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
21static const char * const aiu_spdif_encode_sel_texts[] = {
22 "SPDIF", "I2S",
23};
24
25static 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
29static const struct snd_kcontrol_new aiu_spdif_encode_mux =
30 SOC_DAPM_ENUM("SPDIF Buffer Src", aiu_spdif_encode_sel_enum);
31
32static 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
37static 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
44int 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
74static 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
81static int aiu_cpu_component_probe(struct snd_soc_component *component)
82{
83 struct aiu *aiu = snd_soc_component_get_drvdata(c: component);
84
85 /* Required for the SPDIF Source control operation */
86 return clk_prepare_enable(clk: aiu->i2s.clks[PCLK].clk);
87}
88
89static void aiu_cpu_component_remove(struct snd_soc_component *component)
90{
91 struct aiu *aiu = snd_soc_component_get_drvdata(c: component);
92
93 clk_disable_unprepare(clk: aiu->i2s.clks[PCLK].clk);
94}
95
96static 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
111static 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
168static 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
175static 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, n: num, size: 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: num, clks);
191 if (ret < 0)
192 return ret;
193
194 interface->clks = clks;
195 interface->clk_num = num;
196 return 0;
197}
198
199static const char * const aiu_i2s_ids[] = {
200 [PCLK] = "i2s_pclk",
201 [AOCLK] = "i2s_aoclk",
202 [MCLK] = "i2s_mclk",
203 [MIXER] = "i2s_mixer",
204};
205
206static const char * const aiu_spdif_ids[] = {
207 [PCLK] = "spdif_pclk",
208 [AOCLK] = "spdif_aoclk",
209 [MCLK] = "spdif_mclk_sel"
210};
211
212static 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, id: "pclk");
219 if (IS_ERR(ptr: pclk))
220 return dev_err_probe(dev, err: PTR_ERR(ptr: pclk), fmt: "Can't get the aiu pclk\n");
221
222 aiu->spdif_mclk = devm_clk_get(dev, id: "spdif_mclk");
223 if (IS_ERR(ptr: aiu->spdif_mclk))
224 return dev_err_probe(dev, err: PTR_ERR(ptr: aiu->spdif_mclk),
225 fmt: "Can't get the aiu spdif master clock\n");
226
227 ret = aiu_clk_bulk_get(dev, ids: aiu_i2s_ids, ARRAY_SIZE(aiu_i2s_ids),
228 interface: &aiu->i2s);
229 if (ret)
230 return dev_err_probe(dev, err: ret, fmt: "Can't get the i2s clocks\n");
231
232 ret = aiu_clk_bulk_get(dev, ids: aiu_spdif_ids, ARRAY_SIZE(aiu_spdif_ids),
233 interface: &aiu->spdif);
234 if (ret)
235 return dev_err_probe(dev, err: ret, fmt: "Can't get the spdif clocks\n");
236
237 return ret;
238}
239
240static 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, size: 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, data: aiu);
257
258 ret = device_reset(dev);
259 if (ret)
260 return dev_err_probe(dev, err: ret, fmt: "Failed to reset device\n");
261
262 regs = devm_platform_ioremap_resource(pdev, index: 0);
263 if (IS_ERR(ptr: regs))
264 return PTR_ERR(ptr: regs);
265
266 map = devm_regmap_init_mmio(dev, regs, &aiu_regmap_cfg);
267 if (IS_ERR(ptr: map)) {
268 dev_err(dev, "failed to init regmap: %ld\n",
269 PTR_ERR(map));
270 return PTR_ERR(ptr: 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, component_driver: &aiu_cpu_component,
287 dai_drv: 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;
312err:
313 snd_soc_unregister_component(dev);
314 return ret;
315}
316
317static void aiu_remove(struct platform_device *pdev)
318{
319 snd_soc_unregister_component(dev: &pdev->dev);
320}
321
322static const struct aiu_platform_data aiu_gxbb_pdata = {
323 .has_acodec = false,
324 .has_clk_ctrl_more_i2s_div = true,
325};
326
327static const struct aiu_platform_data aiu_gxl_pdata = {
328 .has_acodec = true,
329 .has_clk_ctrl_more_i2s_div = true,
330};
331
332static const struct aiu_platform_data aiu_meson8_pdata = {
333 .has_acodec = false,
334 .has_clk_ctrl_more_i2s_div = false,
335};
336
337static 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};
344MODULE_DEVICE_TABLE(of, aiu_of_match);
345
346static 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};
354module_platform_driver(aiu_pdrv);
355
356MODULE_DESCRIPTION("Meson AIU Driver");
357MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
358MODULE_LICENSE("GPL v2");
359

source code of linux/sound/soc/meson/aiu.c