xref: /kernel/linux/linux-5.10/sound/soc/sh/rcar/ctu.c (revision 8c2ecf20) 
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
72struct 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
95static 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
101static 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
107static 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
114static 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
151static 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
170static 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
187static 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
198static 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
215	/* ROW0 */
216	ret = rsnd_kctrl_new_m(mod, io, rtd, "CTU SV0",
217			       rsnd_kctrl_accept_anytime,
218			       NULL,
219			       &ctu->sv[0], RSND_MAX_CHANNELS,
220			       0x00FFFFFF);
221	if (ret < 0)
222		return ret;
223
224	/* ROW1 */
225	ret = rsnd_kctrl_new_m(mod, io, rtd, "CTU SV1",
226			       rsnd_kctrl_accept_anytime,
227			       NULL,
228			       &ctu->sv[1], RSND_MAX_CHANNELS,
229			       0x00FFFFFF);
230	if (ret < 0)
231		return ret;
232
233	/* ROW2 */
234	ret = rsnd_kctrl_new_m(mod, io, rtd, "CTU SV2",
235			       rsnd_kctrl_accept_anytime,
236			       NULL,
237			       &ctu->sv[2], RSND_MAX_CHANNELS,
238			       0x00FFFFFF);
239	if (ret < 0)
240		return ret;
241
242	/* ROW3 */
243	ret = rsnd_kctrl_new_m(mod, io, rtd, "CTU SV3",
244			       rsnd_kctrl_accept_anytime,
245			       NULL,
246			       &ctu->sv[3], RSND_MAX_CHANNELS,
247			       0x00FFFFFF);
248	if (ret < 0)
249		return ret;
250
251	/* Reset */
252	ret = rsnd_kctrl_new_s(mod, io, rtd, "CTU Reset",
253			       rsnd_kctrl_accept_anytime,
254			       rsnd_ctu_value_reset,
255			       &ctu->reset, 1);
256
257	rsnd_flags_set(ctu, KCTRL_INITIALIZED);
258
259	return ret;
260}
261
262static int rsnd_ctu_id(struct rsnd_mod *mod)
263{
264	/*
265	 * ctu00: -> 0, ctu01: -> 0, ctu02: -> 0, ctu03: -> 0
266	 * ctu10: -> 1, ctu11: -> 1, ctu12: -> 1, ctu13: -> 1
267	 */
268	return mod->id / 4;
269}
270
271static int rsnd_ctu_id_sub(struct rsnd_mod *mod)
272{
273	/*
274	 * ctu00: -> 0, ctu01: -> 1, ctu02: -> 2, ctu03: -> 3
275	 * ctu10: -> 0, ctu11: -> 1, ctu12: -> 2, ctu13: -> 3
276	 */
277	return mod->id % 4;
278}
279
280static struct rsnd_mod_ops rsnd_ctu_ops = {
281	.name		= CTU_NAME,
282	.probe		= rsnd_ctu_probe_,
283	.init		= rsnd_ctu_init,
284	.quit		= rsnd_ctu_quit,
285	.pcm_new	= rsnd_ctu_pcm_new,
286	.get_status	= rsnd_mod_get_status,
287	.id		= rsnd_ctu_id,
288	.id_sub		= rsnd_ctu_id_sub,
289	.id_cmd		= rsnd_mod_id_raw,
290};
291
292struct rsnd_mod *rsnd_ctu_mod_get(struct rsnd_priv *priv, int id)
293{
294	if (WARN_ON(id < 0 || id >= rsnd_ctu_nr(priv)))
295		id = 0;
296
297	return rsnd_mod_get(rsnd_ctu_get(priv, id));
298}
299
300int rsnd_ctu_probe(struct rsnd_priv *priv)
301{
302	struct device_node *node;
303	struct device_node *np;
304	struct device *dev = rsnd_priv_to_dev(priv);
305	struct rsnd_ctu *ctu;
306	struct clk *clk;
307	char name[CTU_NAME_SIZE];
308	int i, nr, ret;
309
310	/* This driver doesn't support Gen1 at this point */
311	if (rsnd_is_gen1(priv))
312		return 0;
313
314	node = rsnd_ctu_of_node(priv);
315	if (!node)
316		return 0; /* not used is not error */
317
318	nr = of_get_child_count(node);
319	if (!nr) {
320		ret = -EINVAL;
321		goto rsnd_ctu_probe_done;
322	}
323
324	ctu = devm_kcalloc(dev, nr, sizeof(*ctu), GFP_KERNEL);
325	if (!ctu) {
326		ret = -ENOMEM;
327		goto rsnd_ctu_probe_done;
328	}
329
330	priv->ctu_nr	= nr;
331	priv->ctu	= ctu;
332
333	i = 0;
334	ret = 0;
335	for_each_child_of_node(node, np) {
336		ctu = rsnd_ctu_get(priv, i);
337
338		/*
339		 * CTU00, CTU01, CTU02, CTU03 => CTU0
340		 * CTU10, CTU11, CTU12, CTU13 => CTU1
341		 */
342		snprintf(name, CTU_NAME_SIZE, "%s.%d",
343			 CTU_NAME, i / 4);
344
345		clk = devm_clk_get(dev, name);
346		if (IS_ERR(clk)) {
347			ret = PTR_ERR(clk);
348			of_node_put(np);
349			goto rsnd_ctu_probe_done;
350		}
351
352		ret = rsnd_mod_init(priv, rsnd_mod_get(ctu), &rsnd_ctu_ops,
353				    clk, RSND_MOD_CTU, i);
354		if (ret) {
355			of_node_put(np);
356			goto rsnd_ctu_probe_done;
357		}
358
359		i++;
360	}
361
362
363rsnd_ctu_probe_done:
364	of_node_put(node);
365
366	return ret;
367}
368
369void rsnd_ctu_remove(struct rsnd_priv *priv)
370{
371	struct rsnd_ctu *ctu;
372	int i;
373
374	for_each_rsnd_ctu(ctu, priv, i) {
375		rsnd_mod_quit(rsnd_mod_get(ctu));
376	}
377}
378