xref: /openbmc/linux/sound/soc/sh/rcar/dvc.c (revision c819e2cf)
1 /*
2  * Renesas R-Car DVC support
3  *
4  * Copyright (C) 2014 Renesas Solutions Corp.
5  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License version 2 as
9  * published by the Free Software Foundation.
10  */
11 #include "rsnd.h"
12 
13 #define RSND_DVC_NAME_SIZE	16
14 
15 #define DVC_NAME "dvc"
16 
17 struct rsnd_dvc {
18 	struct rsnd_dvc_platform_info *info; /* rcar_snd.h */
19 	struct rsnd_mod mod;
20 	struct clk *clk;
21 	struct rsnd_kctrl_cfg_m volume;
22 	struct rsnd_kctrl_cfg_m mute;
23 	struct rsnd_kctrl_cfg_s ren;	/* Ramp Enable */
24 	struct rsnd_kctrl_cfg_s rup;	/* Ramp Rate Up */
25 	struct rsnd_kctrl_cfg_s rdown;	/* Ramp Rate Down */
26 };
27 
28 #define rsnd_mod_to_dvc(_mod)	\
29 	container_of((_mod), struct rsnd_dvc, mod)
30 
31 #define for_each_rsnd_dvc(pos, priv, i)				\
32 	for ((i) = 0;						\
33 	     ((i) < rsnd_dvc_nr(priv)) &&			\
34 	     ((pos) = (struct rsnd_dvc *)(priv)->dvc + i);	\
35 	     i++)
36 
37 static const char const *dvc_ramp_rate[] = {
38 	"128 dB/1 step",	 /* 00000 */
39 	"64 dB/1 step",		 /* 00001 */
40 	"32 dB/1 step",		 /* 00010 */
41 	"16 dB/1 step",		 /* 00011 */
42 	"8 dB/1 step",		 /* 00100 */
43 	"4 dB/1 step",		 /* 00101 */
44 	"2 dB/1 step",		 /* 00110 */
45 	"1 dB/1 step",		 /* 00111 */
46 	"0.5 dB/1 step",	 /* 01000 */
47 	"0.25 dB/1 step",	 /* 01001 */
48 	"0.125 dB/1 step",	 /* 01010 */
49 	"0.125 dB/2 steps",	 /* 01011 */
50 	"0.125 dB/4 steps",	 /* 01100 */
51 	"0.125 dB/8 steps",	 /* 01101 */
52 	"0.125 dB/16 steps",	 /* 01110 */
53 	"0.125 dB/32 steps",	 /* 01111 */
54 	"0.125 dB/64 steps",	 /* 10000 */
55 	"0.125 dB/128 steps",	 /* 10001 */
56 	"0.125 dB/256 steps",	 /* 10010 */
57 	"0.125 dB/512 steps",	 /* 10011 */
58 	"0.125 dB/1024 steps",	 /* 10100 */
59 	"0.125 dB/2048 steps",	 /* 10101 */
60 	"0.125 dB/4096 steps",	 /* 10110 */
61 	"0.125 dB/8192 steps",	 /* 10111 */
62 };
63 
64 static void rsnd_dvc_volume_update(struct rsnd_mod *mod)
65 {
66 	struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
67 	u32 val[RSND_DVC_CHANNELS];
68 	u32 dvucr = 0;
69 	u32 mute = 0;
70 	int i;
71 
72 	for (i = 0; i < dvc->mute.cfg.size; i++)
73 		mute |= (!!dvc->mute.cfg.val[i]) << i;
74 
75 	/* Disable DVC Register access */
76 	rsnd_mod_write(mod, DVC_DVUER, 0);
77 
78 	/* Enable Ramp */
79 	if (dvc->ren.val) {
80 		dvucr |= 0x10;
81 
82 		/* Digital Volume Max */
83 		for (i = 0; i < RSND_DVC_CHANNELS; i++)
84 			val[i] = dvc->volume.cfg.max;
85 
86 		rsnd_mod_write(mod, DVC_VRCTR, 0xff);
87 		rsnd_mod_write(mod, DVC_VRPDR, dvc->rup.val << 8 |
88 					       dvc->rdown.val);
89 		/*
90 		 * FIXME !!
91 		 * use scale-downed Digital Volume
92 		 * as Volume Ramp
93 		 * 7F FFFF -> 3FF
94 		 */
95 		rsnd_mod_write(mod, DVC_VRDBR,
96 			       0x3ff - (dvc->volume.val[0] >> 13));
97 
98 	} else {
99 		for (i = 0; i < RSND_DVC_CHANNELS; i++)
100 			val[i] = dvc->volume.val[i];
101 	}
102 
103 	/* Enable Digital Volume */
104 	dvucr |= 0x100;
105 	rsnd_mod_write(mod, DVC_VOL0R, val[0]);
106 	rsnd_mod_write(mod, DVC_VOL1R, val[1]);
107 
108 	/*  Enable Mute */
109 	if (mute) {
110 		dvucr |= 0x1;
111 		rsnd_mod_write(mod, DVC_ZCMCR, mute);
112 	}
113 
114 	rsnd_mod_write(mod, DVC_DVUCR, dvucr);
115 
116 	/* Enable DVC Register access */
117 	rsnd_mod_write(mod, DVC_DVUER, 1);
118 }
119 
120 static int rsnd_dvc_probe_gen2(struct rsnd_mod *mod,
121 			       struct rsnd_dai *rdai)
122 {
123 	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
124 	struct device *dev = rsnd_priv_to_dev(priv);
125 
126 	dev_dbg(dev, "%s[%d] (Gen2) is probed\n",
127 		rsnd_mod_name(mod), rsnd_mod_id(mod));
128 
129 	return 0;
130 }
131 
132 static int rsnd_dvc_init(struct rsnd_mod *dvc_mod,
133 			 struct rsnd_dai *rdai)
134 {
135 	struct rsnd_dvc *dvc = rsnd_mod_to_dvc(dvc_mod);
136 	struct rsnd_dai_stream *io = rsnd_mod_to_io(dvc_mod);
137 	struct rsnd_priv *priv = rsnd_mod_to_priv(dvc_mod);
138 	struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io);
139 	struct device *dev = rsnd_priv_to_dev(priv);
140 	int dvc_id = rsnd_mod_id(dvc_mod);
141 	int src_id = rsnd_mod_id(src_mod);
142 	u32 route[] = {
143 		[0] = 0x30000,
144 		[1] = 0x30001,
145 		[2] = 0x40000,
146 		[3] = 0x10000,
147 		[4] = 0x20000,
148 		[5] = 0x40100
149 	};
150 
151 	if (src_id >= ARRAY_SIZE(route)) {
152 		dev_err(dev, "DVC%d isn't connected to SRC%d\n", dvc_id, src_id);
153 		return -EINVAL;
154 	}
155 
156 	clk_prepare_enable(dvc->clk);
157 
158 	/*
159 	 * fixme
160 	 * it doesn't support CTU/MIX
161 	 */
162 	rsnd_mod_write(dvc_mod, CMD_ROUTE_SLCT, route[src_id]);
163 
164 	rsnd_mod_write(dvc_mod, DVC_SWRSR, 0);
165 	rsnd_mod_write(dvc_mod, DVC_SWRSR, 1);
166 
167 	rsnd_mod_write(dvc_mod, DVC_DVUIR, 1);
168 
169 	rsnd_mod_write(dvc_mod, DVC_ADINR, rsnd_get_adinr(dvc_mod));
170 
171 	/* ch0/ch1 Volume */
172 	rsnd_dvc_volume_update(dvc_mod);
173 
174 	rsnd_mod_write(dvc_mod, DVC_DVUIR, 0);
175 
176 	rsnd_adg_set_cmd_timsel_gen2(rdai, dvc_mod, io);
177 
178 	return 0;
179 }
180 
181 static int rsnd_dvc_quit(struct rsnd_mod *mod,
182 			 struct rsnd_dai *rdai)
183 {
184 	struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
185 
186 	clk_disable_unprepare(dvc->clk);
187 
188 	return 0;
189 }
190 
191 static int rsnd_dvc_start(struct rsnd_mod *mod,
192 			  struct rsnd_dai *rdai)
193 {
194 	rsnd_mod_write(mod, CMD_CTRL, 0x10);
195 
196 	return 0;
197 }
198 
199 static int rsnd_dvc_stop(struct rsnd_mod *mod,
200 			 struct rsnd_dai *rdai)
201 {
202 	rsnd_mod_write(mod, CMD_CTRL, 0);
203 
204 	return 0;
205 }
206 
207 static int rsnd_dvc_pcm_new(struct rsnd_mod *mod,
208 			    struct rsnd_dai *rdai,
209 			    struct snd_soc_pcm_runtime *rtd)
210 {
211 	struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
212 	struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
213 	int ret;
214 
215 	/* Volume */
216 	ret = rsnd_kctrl_new_m(mod, rdai, rtd,
217 			rsnd_dai_is_play(rdai, io) ?
218 			"DVC Out Playback Volume" : "DVC In Capture Volume",
219 			rsnd_dvc_volume_update,
220 			&dvc->volume, 0x00800000 - 1);
221 	if (ret < 0)
222 		return ret;
223 
224 	/* Mute */
225 	ret = rsnd_kctrl_new_m(mod, rdai, rtd,
226 			rsnd_dai_is_play(rdai, io) ?
227 			"DVC Out Mute Switch" : "DVC In Mute Switch",
228 			rsnd_dvc_volume_update,
229 			&dvc->mute, 1);
230 	if (ret < 0)
231 		return ret;
232 
233 	/* Ramp */
234 	ret = rsnd_kctrl_new_s(mod, rdai, rtd,
235 			rsnd_dai_is_play(rdai, io) ?
236 			"DVC Out Ramp Switch" : "DVC In Ramp Switch",
237 			rsnd_dvc_volume_update,
238 			&dvc->ren, 1);
239 	if (ret < 0)
240 		return ret;
241 
242 	ret = rsnd_kctrl_new_e(mod, rdai, rtd,
243 			rsnd_dai_is_play(rdai, io) ?
244 			"DVC Out Ramp Up Rate" : "DVC In Ramp Up Rate",
245 			&dvc->rup,
246 			rsnd_dvc_volume_update,
247 			dvc_ramp_rate, ARRAY_SIZE(dvc_ramp_rate));
248 	if (ret < 0)
249 		return ret;
250 
251 	ret = rsnd_kctrl_new_e(mod, rdai, rtd,
252 			rsnd_dai_is_play(rdai, io) ?
253 			"DVC Out Ramp Down Rate" : "DVC In Ramp Down Rate",
254 			&dvc->rdown,
255 			rsnd_dvc_volume_update,
256 			dvc_ramp_rate, ARRAY_SIZE(dvc_ramp_rate));
257 
258 	if (ret < 0)
259 		return ret;
260 
261 	return 0;
262 }
263 
264 static struct rsnd_mod_ops rsnd_dvc_ops = {
265 	.name		= DVC_NAME,
266 	.probe		= rsnd_dvc_probe_gen2,
267 	.init		= rsnd_dvc_init,
268 	.quit		= rsnd_dvc_quit,
269 	.start		= rsnd_dvc_start,
270 	.stop		= rsnd_dvc_stop,
271 	.pcm_new	= rsnd_dvc_pcm_new,
272 };
273 
274 struct rsnd_mod *rsnd_dvc_mod_get(struct rsnd_priv *priv, int id)
275 {
276 	if (WARN_ON(id < 0 || id >= rsnd_dvc_nr(priv)))
277 		id = 0;
278 
279 	return &((struct rsnd_dvc *)(priv->dvc) + id)->mod;
280 }
281 
282 static void rsnd_of_parse_dvc(struct platform_device *pdev,
283 			      const struct rsnd_of_data *of_data,
284 			      struct rsnd_priv *priv)
285 {
286 	struct device_node *node;
287 	struct rsnd_dvc_platform_info *dvc_info;
288 	struct rcar_snd_info *info = rsnd_priv_to_info(priv);
289 	struct device *dev = &pdev->dev;
290 	int nr;
291 
292 	if (!of_data)
293 		return;
294 
295 	node = of_get_child_by_name(dev->of_node, "rcar_sound,dvc");
296 	if (!node)
297 		return;
298 
299 	nr = of_get_child_count(node);
300 	if (!nr)
301 		goto rsnd_of_parse_dvc_end;
302 
303 	dvc_info = devm_kzalloc(dev,
304 				sizeof(struct rsnd_dvc_platform_info) * nr,
305 				GFP_KERNEL);
306 	if (!dvc_info) {
307 		dev_err(dev, "dvc info allocation error\n");
308 		goto rsnd_of_parse_dvc_end;
309 	}
310 
311 	info->dvc_info		= dvc_info;
312 	info->dvc_info_nr	= nr;
313 
314 rsnd_of_parse_dvc_end:
315 	of_node_put(node);
316 }
317 
318 int rsnd_dvc_probe(struct platform_device *pdev,
319 		   const struct rsnd_of_data *of_data,
320 		   struct rsnd_priv *priv)
321 {
322 	struct rcar_snd_info *info = rsnd_priv_to_info(priv);
323 	struct device *dev = rsnd_priv_to_dev(priv);
324 	struct rsnd_dvc *dvc;
325 	struct clk *clk;
326 	char name[RSND_DVC_NAME_SIZE];
327 	int i, nr;
328 
329 	rsnd_of_parse_dvc(pdev, of_data, priv);
330 
331 	nr = info->dvc_info_nr;
332 	if (!nr)
333 		return 0;
334 
335 	/* This driver doesn't support Gen1 at this point */
336 	if (rsnd_is_gen1(priv)) {
337 		dev_warn(dev, "CMD is not supported on Gen1\n");
338 		return -EINVAL;
339 	}
340 
341 	dvc	= devm_kzalloc(dev, sizeof(*dvc) * nr, GFP_KERNEL);
342 	if (!dvc) {
343 		dev_err(dev, "CMD allocate failed\n");
344 		return -ENOMEM;
345 	}
346 
347 	priv->dvc_nr	= nr;
348 	priv->dvc	= dvc;
349 
350 	for_each_rsnd_dvc(dvc, priv, i) {
351 		snprintf(name, RSND_DVC_NAME_SIZE, "%s.%d",
352 			 DVC_NAME, i);
353 
354 		clk = devm_clk_get(dev, name);
355 		if (IS_ERR(clk))
356 			return PTR_ERR(clk);
357 
358 		dvc->info = &info->dvc_info[i];
359 		dvc->clk  = clk;
360 
361 		rsnd_mod_init(priv, &dvc->mod, &rsnd_dvc_ops, RSND_MOD_DVC, i);
362 
363 		dev_dbg(dev, "CMD%d probed\n", i);
364 	}
365 
366 	return 0;
367 }
368