1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // Copyright (c) 2020 BayLibre, SAS.
4 // Author: Jerome Brunet <jbrunet@baylibre.com>
5
6 #include <linux/bitfield.h>
7 #include <linux/clk.h>
8 #include <linux/module.h>
9 #include <linux/of_platform.h>
10 #include <linux/regmap.h>
11 #include <linux/reset.h>
12 #include <sound/soc.h>
13 #include <sound/soc-dai.h>
14
15 #include <dt-bindings/sound/meson-aiu.h>
16 #include "aiu.h"
17 #include "aiu-fifo.h"
18
19 #define AIU_I2S_MISC_958_SRC_SHIFT 3
20
21 static const char * const aiu_spdif_encode_sel_texts[] = {
22 "SPDIF", "I2S",
23 };
24
25 static SOC_ENUM_SINGLE_DECL(aiu_spdif_encode_sel_enum, AIU_I2S_MISC,
26 AIU_I2S_MISC_958_SRC_SHIFT,
27 aiu_spdif_encode_sel_texts);
28
29 static const struct snd_kcontrol_new aiu_spdif_encode_mux =
30 SOC_DAPM_ENUM("SPDIF Buffer Src", aiu_spdif_encode_sel_enum);
31
32 static const struct snd_soc_dapm_widget aiu_cpu_dapm_widgets[] = {
33 SND_SOC_DAPM_MUX("SPDIF SRC SEL", SND_SOC_NOPM, 0, 0,
34 &aiu_spdif_encode_mux),
35 };
36
37 static const struct snd_soc_dapm_route aiu_cpu_dapm_routes[] = {
38 { "I2S Encoder Playback", NULL, "I2S FIFO Playback" },
39 { "SPDIF SRC SEL", "SPDIF", "SPDIF FIFO Playback" },
40 { "SPDIF SRC SEL", "I2S", "I2S FIFO Playback" },
41 { "SPDIF Encoder Playback", NULL, "SPDIF SRC SEL" },
42 };
43
aiu_of_xlate_dai_name(struct snd_soc_component * component,const struct of_phandle_args * args,const char ** dai_name,unsigned int component_id)44 int aiu_of_xlate_dai_name(struct snd_soc_component *component,
45 const struct of_phandle_args *args,
46 const char **dai_name,
47 unsigned int component_id)
48 {
49 struct snd_soc_dai *dai;
50 int id;
51
52 if (args->args_count != 2)
53 return -EINVAL;
54
55 if (args->args[0] != component_id)
56 return -EINVAL;
57
58 id = args->args[1];
59
60 if (id < 0 || id >= component->num_dai)
61 return -EINVAL;
62
63 for_each_component_dais(component, dai) {
64 if (id == 0)
65 break;
66 id--;
67 }
68
69 *dai_name = dai->driver->name;
70
71 return 0;
72 }
73
aiu_cpu_of_xlate_dai_name(struct snd_soc_component * component,const struct of_phandle_args * args,const char ** dai_name)74 static int aiu_cpu_of_xlate_dai_name(struct snd_soc_component *component,
75 const struct of_phandle_args *args,
76 const char **dai_name)
77 {
78 return aiu_of_xlate_dai_name(component, args, dai_name, AIU_CPU);
79 }
80
aiu_cpu_component_probe(struct snd_soc_component * component)81 static int aiu_cpu_component_probe(struct snd_soc_component *component)
82 {
83 struct aiu *aiu = snd_soc_component_get_drvdata(component);
84
85 /* Required for the SPDIF Source control operation */
86 return clk_prepare_enable(aiu->i2s.clks[PCLK].clk);
87 }
88
aiu_cpu_component_remove(struct snd_soc_component * component)89 static void aiu_cpu_component_remove(struct snd_soc_component *component)
90 {
91 struct aiu *aiu = snd_soc_component_get_drvdata(component);
92
93 clk_disable_unprepare(aiu->i2s.clks[PCLK].clk);
94 }
95
96 static const struct snd_soc_component_driver aiu_cpu_component = {
97 .name = "AIU CPU",
98 .dapm_widgets = aiu_cpu_dapm_widgets,
99 .num_dapm_widgets = ARRAY_SIZE(aiu_cpu_dapm_widgets),
100 .dapm_routes = aiu_cpu_dapm_routes,
101 .num_dapm_routes = ARRAY_SIZE(aiu_cpu_dapm_routes),
102 .of_xlate_dai_name = aiu_cpu_of_xlate_dai_name,
103 .pointer = aiu_fifo_pointer,
104 .probe = aiu_cpu_component_probe,
105 .remove = aiu_cpu_component_remove,
106 #ifdef CONFIG_DEBUG_FS
107 .debugfs_prefix = "cpu",
108 #endif
109 };
110
111 static struct snd_soc_dai_driver aiu_cpu_dai_drv[] = {
112 [CPU_I2S_FIFO] = {
113 .name = "I2S FIFO",
114 .playback = {
115 .stream_name = "I2S FIFO Playback",
116 .channels_min = 2,
117 .channels_max = 8,
118 .rates = SNDRV_PCM_RATE_CONTINUOUS,
119 .rate_min = 5512,
120 .rate_max = 192000,
121 .formats = AIU_FORMATS,
122 },
123 .ops = &aiu_fifo_i2s_dai_ops,
124 },
125 [CPU_SPDIF_FIFO] = {
126 .name = "SPDIF FIFO",
127 .playback = {
128 .stream_name = "SPDIF FIFO Playback",
129 .channels_min = 2,
130 .channels_max = 2,
131 .rates = SNDRV_PCM_RATE_CONTINUOUS,
132 .rate_min = 5512,
133 .rate_max = 192000,
134 .formats = AIU_FORMATS,
135 },
136 .ops = &aiu_fifo_spdif_dai_ops,
137 },
138 [CPU_I2S_ENCODER] = {
139 .name = "I2S Encoder",
140 .playback = {
141 .stream_name = "I2S Encoder Playback",
142 .channels_min = 2,
143 .channels_max = 8,
144 .rates = SNDRV_PCM_RATE_8000_192000,
145 .formats = AIU_FORMATS,
146 },
147 .ops = &aiu_encoder_i2s_dai_ops,
148 },
149 [CPU_SPDIF_ENCODER] = {
150 .name = "SPDIF Encoder",
151 .playback = {
152 .stream_name = "SPDIF Encoder Playback",
153 .channels_min = 2,
154 .channels_max = 2,
155 .rates = (SNDRV_PCM_RATE_32000 |
156 SNDRV_PCM_RATE_44100 |
157 SNDRV_PCM_RATE_48000 |
158 SNDRV_PCM_RATE_88200 |
159 SNDRV_PCM_RATE_96000 |
160 SNDRV_PCM_RATE_176400 |
161 SNDRV_PCM_RATE_192000),
162 .formats = AIU_FORMATS,
163 },
164 .ops = &aiu_encoder_spdif_dai_ops,
165 }
166 };
167
168 static const struct regmap_config aiu_regmap_cfg = {
169 .reg_bits = 32,
170 .val_bits = 32,
171 .reg_stride = 4,
172 .max_register = 0x2ac,
173 };
174
aiu_clk_bulk_get(struct device * dev,const char * const * ids,unsigned int num,struct aiu_interface * interface)175 static int aiu_clk_bulk_get(struct device *dev,
176 const char * const *ids,
177 unsigned int num,
178 struct aiu_interface *interface)
179 {
180 struct clk_bulk_data *clks;
181 int i, ret;
182
183 clks = devm_kcalloc(dev, num, sizeof(*clks), GFP_KERNEL);
184 if (!clks)
185 return -ENOMEM;
186
187 for (i = 0; i < num; i++)
188 clks[i].id = ids[i];
189
190 ret = devm_clk_bulk_get(dev, num, clks);
191 if (ret < 0)
192 return ret;
193
194 interface->clks = clks;
195 interface->clk_num = num;
196 return 0;
197 }
198
199 static const char * const aiu_i2s_ids[] = {
200 [PCLK] = "i2s_pclk",
201 [AOCLK] = "i2s_aoclk",
202 [MCLK] = "i2s_mclk",
203 [MIXER] = "i2s_mixer",
204 };
205
206 static const char * const aiu_spdif_ids[] = {
207 [PCLK] = "spdif_pclk",
208 [AOCLK] = "spdif_aoclk",
209 [MCLK] = "spdif_mclk_sel"
210 };
211
aiu_clk_get(struct device * dev)212 static int aiu_clk_get(struct device *dev)
213 {
214 struct aiu *aiu = dev_get_drvdata(dev);
215 struct clk *pclk;
216 int ret;
217
218 pclk = devm_clk_get_enabled(dev, "pclk");
219 if (IS_ERR(pclk))
220 return dev_err_probe(dev, PTR_ERR(pclk), "Can't get the aiu pclk\n");
221
222 aiu->spdif_mclk = devm_clk_get(dev, "spdif_mclk");
223 if (IS_ERR(aiu->spdif_mclk))
224 return dev_err_probe(dev, PTR_ERR(aiu->spdif_mclk),
225 "Can't get the aiu spdif master clock\n");
226
227 ret = aiu_clk_bulk_get(dev, aiu_i2s_ids, ARRAY_SIZE(aiu_i2s_ids),
228 &aiu->i2s);
229 if (ret)
230 return dev_err_probe(dev, ret, "Can't get the i2s clocks\n");
231
232 ret = aiu_clk_bulk_get(dev, aiu_spdif_ids, ARRAY_SIZE(aiu_spdif_ids),
233 &aiu->spdif);
234 if (ret)
235 return dev_err_probe(dev, ret, "Can't get the spdif clocks\n");
236
237 return ret;
238 }
239
aiu_probe(struct platform_device * pdev)240 static int aiu_probe(struct platform_device *pdev)
241 {
242 struct device *dev = &pdev->dev;
243 void __iomem *regs;
244 struct regmap *map;
245 struct aiu *aiu;
246 int ret;
247
248 aiu = devm_kzalloc(dev, sizeof(*aiu), GFP_KERNEL);
249 if (!aiu)
250 return -ENOMEM;
251
252 aiu->platform = device_get_match_data(dev);
253 if (!aiu->platform)
254 return -ENODEV;
255
256 platform_set_drvdata(pdev, aiu);
257
258 ret = device_reset(dev);
259 if (ret)
260 return dev_err_probe(dev, ret, "Failed to reset device\n");
261
262 regs = devm_platform_ioremap_resource(pdev, 0);
263 if (IS_ERR(regs))
264 return PTR_ERR(regs);
265
266 map = devm_regmap_init_mmio(dev, regs, &aiu_regmap_cfg);
267 if (IS_ERR(map)) {
268 dev_err(dev, "failed to init regmap: %ld\n",
269 PTR_ERR(map));
270 return PTR_ERR(map);
271 }
272
273 aiu->i2s.irq = platform_get_irq_byname(pdev, "i2s");
274 if (aiu->i2s.irq < 0)
275 return aiu->i2s.irq;
276
277 aiu->spdif.irq = platform_get_irq_byname(pdev, "spdif");
278 if (aiu->spdif.irq < 0)
279 return aiu->spdif.irq;
280
281 ret = aiu_clk_get(dev);
282 if (ret)
283 return ret;
284
285 /* Register the cpu component of the aiu */
286 ret = snd_soc_register_component(dev, &aiu_cpu_component,
287 aiu_cpu_dai_drv,
288 ARRAY_SIZE(aiu_cpu_dai_drv));
289 if (ret) {
290 dev_err(dev, "Failed to register cpu component\n");
291 return ret;
292 }
293
294 /* Register the hdmi codec control component */
295 ret = aiu_hdmi_ctrl_register_component(dev);
296 if (ret) {
297 dev_err(dev, "Failed to register hdmi control component\n");
298 goto err;
299 }
300
301 /* Register the internal dac control component on gxl */
302 if (aiu->platform->has_acodec) {
303 ret = aiu_acodec_ctrl_register_component(dev);
304 if (ret) {
305 dev_err(dev,
306 "Failed to register acodec control component\n");
307 goto err;
308 }
309 }
310
311 return 0;
312 err:
313 snd_soc_unregister_component(dev);
314 return ret;
315 }
316
aiu_remove(struct platform_device * pdev)317 static void aiu_remove(struct platform_device *pdev)
318 {
319 snd_soc_unregister_component(&pdev->dev);
320 }
321
322 static const struct aiu_platform_data aiu_gxbb_pdata = {
323 .has_acodec = false,
324 .has_clk_ctrl_more_i2s_div = true,
325 };
326
327 static const struct aiu_platform_data aiu_gxl_pdata = {
328 .has_acodec = true,
329 .has_clk_ctrl_more_i2s_div = true,
330 };
331
332 static const struct aiu_platform_data aiu_meson8_pdata = {
333 .has_acodec = false,
334 .has_clk_ctrl_more_i2s_div = false,
335 };
336
337 static const struct of_device_id aiu_of_match[] = {
338 { .compatible = "amlogic,aiu-gxbb", .data = &aiu_gxbb_pdata },
339 { .compatible = "amlogic,aiu-gxl", .data = &aiu_gxl_pdata },
340 { .compatible = "amlogic,aiu-meson8", .data = &aiu_meson8_pdata },
341 { .compatible = "amlogic,aiu-meson8b", .data = &aiu_meson8_pdata },
342 {}
343 };
344 MODULE_DEVICE_TABLE(of, aiu_of_match);
345
346 static struct platform_driver aiu_pdrv = {
347 .probe = aiu_probe,
348 .remove_new = aiu_remove,
349 .driver = {
350 .name = "meson-aiu",
351 .of_match_table = aiu_of_match,
352 },
353 };
354 module_platform_driver(aiu_pdrv);
355
356 MODULE_DESCRIPTION("Meson AIU Driver");
357 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
358 MODULE_LICENSE("GPL v2");
359