ASoC: rcar: add rsnd_is_accessible_reg()
[deliverable/linux.git] / sound / soc / sh / rcar / gen.c
CommitLineData
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1/*
2 * Renesas R-Car Gen1 SRU/SSI support
3 *
4 * Copyright (C) 2013 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
13struct rsnd_gen_ops {
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14 int (*probe)(struct platform_device *pdev,
15 struct rcar_snd_info *info,
16 struct rsnd_priv *priv);
17 void (*remove)(struct platform_device *pdev,
18 struct rsnd_priv *priv);
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19 int (*path_init)(struct rsnd_priv *priv,
20 struct rsnd_dai *rdai,
21 struct rsnd_dai_stream *io);
22 int (*path_exit)(struct rsnd_priv *priv,
23 struct rsnd_dai *rdai,
24 struct rsnd_dai_stream *io);
25};
26
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27struct rsnd_gen {
28 void __iomem *base[RSND_BASE_MAX];
29
3337744a 30 struct rsnd_gen_ops *ops;
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31
32 struct regmap *regmap;
33 struct regmap_field *regs[RSND_REG_MAX];
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34};
35
36#define rsnd_priv_to_gen(p) ((struct rsnd_gen *)(p)->gen)
37
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38#define RSND_REG_SET(gen, id, reg_id, offset, _id_offset, _id_size) \
39 [id] = { \
40 .reg = (unsigned int)gen->base[reg_id] + offset, \
41 .lsb = 0, \
42 .msb = 31, \
43 .id_size = _id_size, \
44 .id_offset = _id_offset, \
45 }
46
47/*
48 * basic function
49 */
50static int rsnd_regmap_write32(void *context, const void *_data, size_t count)
51{
52 struct rsnd_priv *priv = context;
53 struct device *dev = rsnd_priv_to_dev(priv);
54 u32 *data = (u32 *)_data;
55 u32 val = data[1];
56 void __iomem *reg = (void *)data[0];
57
58 iowrite32(val, reg);
59
60 dev_dbg(dev, "w %p : %08x\n", reg, val);
61
62 return 0;
63}
64
65static int rsnd_regmap_read32(void *context,
66 const void *_data, size_t reg_size,
67 void *_val, size_t val_size)
68{
69 struct rsnd_priv *priv = context;
70 struct device *dev = rsnd_priv_to_dev(priv);
71 u32 *data = (u32 *)_data;
72 u32 *val = (u32 *)_val;
73 void __iomem *reg = (void *)data[0];
74
75 *val = ioread32(reg);
76
77 dev_dbg(dev, "r %p : %08x\n", reg, *val);
78
79 return 0;
80}
81
82static struct regmap_bus rsnd_regmap_bus = {
83 .write = rsnd_regmap_write32,
84 .read = rsnd_regmap_read32,
85 .reg_format_endian_default = REGMAP_ENDIAN_NATIVE,
86 .val_format_endian_default = REGMAP_ENDIAN_NATIVE,
87};
88
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89static int rsnd_is_accessible_reg(struct rsnd_priv *priv,
90 struct rsnd_gen *gen, enum rsnd_reg reg)
91{
92 if (!gen->regs[reg]) {
93 struct device *dev = rsnd_priv_to_dev(priv);
94
95 dev_err(dev, "unsupported register access %x\n", reg);
96 return 0;
97 }
98
99 return 1;
100}
101
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102u32 rsnd_read(struct rsnd_priv *priv,
103 struct rsnd_mod *mod, enum rsnd_reg reg)
104{
105 struct rsnd_gen *gen = rsnd_priv_to_gen(priv);
106 u32 val;
107
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108 if (!rsnd_is_accessible_reg(priv, gen, reg))
109 return 0;
110
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111 regmap_fields_read(gen->regs[reg], rsnd_mod_id(mod), &val);
112
113 return val;
114}
115
116void rsnd_write(struct rsnd_priv *priv,
117 struct rsnd_mod *mod,
118 enum rsnd_reg reg, u32 data)
119{
120 struct rsnd_gen *gen = rsnd_priv_to_gen(priv);
121
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122 if (!rsnd_is_accessible_reg(priv, gen, reg))
123 return;
124
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125 regmap_fields_write(gen->regs[reg], rsnd_mod_id(mod), data);
126}
127
128void rsnd_bset(struct rsnd_priv *priv, struct rsnd_mod *mod,
129 enum rsnd_reg reg, u32 mask, u32 data)
130{
131 struct rsnd_gen *gen = rsnd_priv_to_gen(priv);
132
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133 if (!rsnd_is_accessible_reg(priv, gen, reg))
134 return;
135
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136 regmap_fields_update_bits(gen->regs[reg], rsnd_mod_id(mod),
137 mask, data);
138}
139
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140static int rsnd_gen_regmap_init(struct rsnd_priv *priv,
141 struct rsnd_gen *gen,
142 struct reg_field *regf)
143{
144 int i;
145 struct device *dev = rsnd_priv_to_dev(priv);
146 struct regmap_config regc;
147
148 memset(&regc, 0, sizeof(regc));
149 regc.reg_bits = 32;
150 regc.val_bits = 32;
151
152 gen->regmap = devm_regmap_init(dev, &rsnd_regmap_bus, priv, &regc);
153 if (IS_ERR(gen->regmap)) {
154 dev_err(dev, "regmap error %ld\n", PTR_ERR(gen->regmap));
155 return PTR_ERR(gen->regmap);
156 }
157
158 for (i = 0; i < RSND_REG_MAX; i++) {
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159 gen->regs[i] = NULL;
160 if (!regf[i].reg)
161 continue;
162
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163 gen->regs[i] = devm_regmap_field_alloc(dev, gen->regmap, regf[i]);
164 if (IS_ERR(gen->regs[i]))
165 return PTR_ERR(gen->regs[i]);
166
167 }
168
169 return 0;
170}
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171/*
172 * Gen2
173 * will be filled in the future
174 */
175
176/*
177 * Gen1
178 */
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179static int rsnd_gen1_path_init(struct rsnd_priv *priv,
180 struct rsnd_dai *rdai,
181 struct rsnd_dai_stream *io)
182{
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183 struct rsnd_mod *mod;
184 int ret;
185 int id;
186
187 /*
188 * Gen1 is created by SRU/SSI, and this SRU is base module of
189 * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU)
190 *
191 * Easy image is..
192 * Gen1 SRU = Gen2 SCU + SSIU + etc
193 *
194 * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is
195 * using fixed path.
196 *
197 * Then, SSI id = SCU id here
198 */
199
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200 /* get SSI's ID */
201 mod = rsnd_ssi_mod_get_frm_dai(priv,
202 rsnd_dai_id(priv, rdai),
203 rsnd_dai_is_play(rdai, io));
204 id = rsnd_mod_id(mod);
07539c1d 205
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206 /* SSI */
207 mod = rsnd_ssi_mod_get(priv, id);
208 ret = rsnd_dai_connect(rdai, mod, io);
209 if (ret < 0)
210 return ret;
211
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212 /* SCU */
213 mod = rsnd_scu_mod_get(priv, id);
214 ret = rsnd_dai_connect(rdai, mod, io);
215
216 return ret;
217}
218
219static int rsnd_gen1_path_exit(struct rsnd_priv *priv,
220 struct rsnd_dai *rdai,
221 struct rsnd_dai_stream *io)
222{
223 struct rsnd_mod *mod, *n;
224 int ret = 0;
225
226 /*
227 * remove all mod from rdai
228 */
229 for_each_rsnd_mod(mod, n, io)
230 ret |= rsnd_dai_disconnect(mod);
231
232 return ret;
233}
234
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235/* single address mapping */
236#define RSND_GEN1_S_REG(gen, reg, id, offset) \
237 RSND_REG_SET(gen, RSND_REG_##id, RSND_GEN1_##reg, offset, 0, 9)
07539c1d 238
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239/* multi address mapping */
240#define RSND_GEN1_M_REG(gen, reg, id, offset, _id_offset) \
241 RSND_REG_SET(gen, RSND_REG_##id, RSND_GEN1_##reg, offset, _id_offset, 9)
242
243static int rsnd_gen1_regmap_init(struct rsnd_priv *priv, struct rsnd_gen *gen)
07539c1d 244{
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245 struct reg_field regf[RSND_REG_MAX] = {
246 RSND_GEN1_S_REG(gen, SRU, SRC_ROUTE_SEL, 0x00),
247 RSND_GEN1_S_REG(gen, SRU, SRC_TMG_SEL0, 0x08),
248 RSND_GEN1_S_REG(gen, SRU, SRC_TMG_SEL1, 0x0c),
249 RSND_GEN1_S_REG(gen, SRU, SRC_TMG_SEL2, 0x10),
250 RSND_GEN1_S_REG(gen, SRU, SRC_CTRL, 0xc0),
251 RSND_GEN1_S_REG(gen, SRU, SSI_MODE0, 0xD0),
252 RSND_GEN1_S_REG(gen, SRU, SSI_MODE1, 0xD4),
253 RSND_GEN1_M_REG(gen, SRU, BUSIF_MODE, 0x20, 0x4),
254 RSND_GEN1_M_REG(gen, SRU, BUSIF_ADINR, 0x214, 0x40),
255
256 RSND_GEN1_S_REG(gen, ADG, BRRA, 0x00),
257 RSND_GEN1_S_REG(gen, ADG, BRRB, 0x04),
258 RSND_GEN1_S_REG(gen, ADG, SSICKR, 0x08),
259 RSND_GEN1_S_REG(gen, ADG, AUDIO_CLK_SEL0, 0x0c),
260 RSND_GEN1_S_REG(gen, ADG, AUDIO_CLK_SEL1, 0x10),
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261
262 RSND_GEN1_M_REG(gen, SSI, SSICR, 0x00, 0x40),
263 RSND_GEN1_M_REG(gen, SSI, SSISR, 0x04, 0x40),
264 RSND_GEN1_M_REG(gen, SSI, SSITDR, 0x08, 0x40),
265 RSND_GEN1_M_REG(gen, SSI, SSIRDR, 0x0c, 0x40),
266 RSND_GEN1_M_REG(gen, SSI, SSIWSR, 0x20, 0x40),
267 };
268
c1e6cc5e 269 return rsnd_gen_regmap_init(priv, gen, regf);
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270}
271
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272static int rsnd_gen1_probe(struct platform_device *pdev,
273 struct rcar_snd_info *info,
274 struct rsnd_priv *priv)
275{
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276 struct device *dev = rsnd_priv_to_dev(priv);
277 struct rsnd_gen *gen = rsnd_priv_to_gen(priv);
278 struct resource *sru_res;
dfc9403b 279 struct resource *adg_res;
ae5c3223 280 struct resource *ssi_res;
55e5b6fd 281 int ret;
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282
283 /*
284 * map address
285 */
286 sru_res = platform_get_resource(pdev, IORESOURCE_MEM, RSND_GEN1_SRU);
dfc9403b 287 adg_res = platform_get_resource(pdev, IORESOURCE_MEM, RSND_GEN1_ADG);
ae5c3223 288 ssi_res = platform_get_resource(pdev, IORESOURCE_MEM, RSND_GEN1_SSI);
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289
290 gen->base[RSND_GEN1_SRU] = devm_ioremap_resource(dev, sru_res);
dfc9403b 291 gen->base[RSND_GEN1_ADG] = devm_ioremap_resource(dev, adg_res);
ae5c3223 292 gen->base[RSND_GEN1_SSI] = devm_ioremap_resource(dev, ssi_res);
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293 if (IS_ERR(gen->base[RSND_GEN1_SRU]) ||
294 IS_ERR(gen->base[RSND_GEN1_ADG]) ||
295 IS_ERR(gen->base[RSND_GEN1_SSI]))
07539c1d 296 return -ENODEV;
07539c1d 297
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298 ret = rsnd_gen1_regmap_init(priv, gen);
299 if (ret < 0)
300 return ret;
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301
302 dev_dbg(dev, "Gen1 device probed\n");
303 dev_dbg(dev, "SRU : %08x => %p\n", sru_res->start,
304 gen->base[RSND_GEN1_SRU]);
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305 dev_dbg(dev, "ADG : %08x => %p\n", adg_res->start,
306 gen->base[RSND_GEN1_ADG]);
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307 dev_dbg(dev, "SSI : %08x => %p\n", ssi_res->start,
308 gen->base[RSND_GEN1_SSI]);
07539c1d 309
3337744a 310 return 0;
ae5c3223 311
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312}
313
314static void rsnd_gen1_remove(struct platform_device *pdev,
315 struct rsnd_priv *priv)
316{
317}
318
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319static struct rsnd_gen_ops rsnd_gen1_ops = {
320 .probe = rsnd_gen1_probe,
321 .remove = rsnd_gen1_remove,
322 .path_init = rsnd_gen1_path_init,
323 .path_exit = rsnd_gen1_path_exit,
324};
325
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326/*
327 * Gen
328 */
329int rsnd_gen_path_init(struct rsnd_priv *priv,
330 struct rsnd_dai *rdai,
331 struct rsnd_dai_stream *io)
332{
333 struct rsnd_gen *gen = rsnd_priv_to_gen(priv);
334
335 return gen->ops->path_init(priv, rdai, io);
336}
337
338int rsnd_gen_path_exit(struct rsnd_priv *priv,
339 struct rsnd_dai *rdai,
340 struct rsnd_dai_stream *io)
341{
342 struct rsnd_gen *gen = rsnd_priv_to_gen(priv);
343
344 return gen->ops->path_exit(priv, rdai, io);
345}
346
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347int rsnd_gen_probe(struct platform_device *pdev,
348 struct rcar_snd_info *info,
349 struct rsnd_priv *priv)
350{
351 struct device *dev = rsnd_priv_to_dev(priv);
352 struct rsnd_gen *gen;
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353
354 gen = devm_kzalloc(dev, sizeof(*gen), GFP_KERNEL);
355 if (!gen) {
356 dev_err(dev, "GEN allocate failed\n");
357 return -ENOMEM;
358 }
359
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360 if (rsnd_is_gen1(priv))
361 gen->ops = &rsnd_gen1_ops;
362
363 if (!gen->ops) {
364 dev_err(dev, "unknown generation R-Car sound device\n");
365 return -ENODEV;
366 }
367
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368 priv->gen = gen;
369
072188b6 370 return gen->ops->probe(pdev, info, priv);
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371}
372
373void rsnd_gen_remove(struct platform_device *pdev,
374 struct rsnd_priv *priv)
375{
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376 struct rsnd_gen *gen = rsnd_priv_to_gen(priv);
377
378 gen->ops->remove(pdev, priv);
3337744a 379}
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