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12#include <linux/module.h>
13#include <linux/delay.h>
14#include <linux/of_gpio.h>
15#include <linux/clk.h>
16#include <linux/pm_runtime.h>
17#include <linux/mfd/syscon.h>
18#include <linux/regmap.h>
19#include <sound/pcm_params.h>
20#include <sound/dmaengine_pcm.h>
21
22#include "rockchip_spdif.h"
23
24enum rk_spdif_type {
25 RK_SPDIF_RK3066,
26 RK_SPDIF_RK3188,
27 RK_SPDIF_RK3288,
28 RK_SPDIF_RK3366,
29};
30
31#define RK3288_GRF_SOC_CON2 0x24c
32
33struct rk_spdif_dev {
34 struct device *dev;
35
36 struct clk *mclk;
37 struct clk *hclk;
38
39 struct snd_dmaengine_dai_dma_data playback_dma_data;
40
41 struct regmap *regmap;
42};
43
44static const struct of_device_id rk_spdif_match[] __maybe_unused = {
45 { .compatible = "rockchip,rk3066-spdif",
46 .data = (void *)RK_SPDIF_RK3066 },
47 { .compatible = "rockchip,rk3188-spdif",
48 .data = (void *)RK_SPDIF_RK3188 },
49 { .compatible = "rockchip,rk3228-spdif",
50 .data = (void *)RK_SPDIF_RK3366 },
51 { .compatible = "rockchip,rk3288-spdif",
52 .data = (void *)RK_SPDIF_RK3288 },
53 { .compatible = "rockchip,rk3328-spdif",
54 .data = (void *)RK_SPDIF_RK3366 },
55 { .compatible = "rockchip,rk3366-spdif",
56 .data = (void *)RK_SPDIF_RK3366 },
57 { .compatible = "rockchip,rk3368-spdif",
58 .data = (void *)RK_SPDIF_RK3366 },
59 { .compatible = "rockchip,rk3399-spdif",
60 .data = (void *)RK_SPDIF_RK3366 },
61 {},
62};
63MODULE_DEVICE_TABLE(of, rk_spdif_match);
64
65static int __maybe_unused rk_spdif_runtime_suspend(struct device *dev)
66{
67 struct rk_spdif_dev *spdif = dev_get_drvdata(dev);
68
69 regcache_cache_only(spdif->regmap, true);
70 clk_disable_unprepare(spdif->mclk);
71 clk_disable_unprepare(spdif->hclk);
72
73 return 0;
74}
75
76static int __maybe_unused rk_spdif_runtime_resume(struct device *dev)
77{
78 struct rk_spdif_dev *spdif = dev_get_drvdata(dev);
79 int ret;
80
81 ret = clk_prepare_enable(spdif->mclk);
82 if (ret) {
83 dev_err(spdif->dev, "mclk clock enable failed %d\n", ret);
84 return ret;
85 }
86
87 ret = clk_prepare_enable(spdif->hclk);
88 if (ret) {
89 dev_err(spdif->dev, "hclk clock enable failed %d\n", ret);
90 return ret;
91 }
92
93 regcache_cache_only(spdif->regmap, false);
94 regcache_mark_dirty(spdif->regmap);
95
96 ret = regcache_sync(spdif->regmap);
97 if (ret) {
98 clk_disable_unprepare(spdif->mclk);
99 clk_disable_unprepare(spdif->hclk);
100 }
101
102 return ret;
103}
104
105static int rk_spdif_hw_params(struct snd_pcm_substream *substream,
106 struct snd_pcm_hw_params *params,
107 struct snd_soc_dai *dai)
108{
109 struct rk_spdif_dev *spdif = snd_soc_dai_get_drvdata(dai);
110 unsigned int val = SPDIF_CFGR_HALFWORD_ENABLE;
111 int srate, mclk;
112 int ret;
113
114 srate = params_rate(params);
115 mclk = srate * 128;
116
117 switch (params_format(params)) {
118 case SNDRV_PCM_FORMAT_S16_LE:
119 val |= SPDIF_CFGR_VDW_16;
120 break;
121 case SNDRV_PCM_FORMAT_S20_3LE:
122 val |= SPDIF_CFGR_VDW_20;
123 break;
124 case SNDRV_PCM_FORMAT_S24_LE:
125 val |= SPDIF_CFGR_VDW_24;
126 break;
127 default:
128 return -EINVAL;
129 }
130
131
132 ret = clk_set_rate(spdif->mclk, mclk);
133 if (ret != 0) {
134 dev_err(spdif->dev, "Failed to set module clock rate: %d\n",
135 ret);
136 return ret;
137 }
138
139 ret = regmap_update_bits(spdif->regmap, SPDIF_CFGR,
140 SPDIF_CFGR_CLK_DIV_MASK | SPDIF_CFGR_HALFWORD_ENABLE |
141 SDPIF_CFGR_VDW_MASK,
142 val);
143
144 return ret;
145}
146
147static int rk_spdif_trigger(struct snd_pcm_substream *substream,
148 int cmd, struct snd_soc_dai *dai)
149{
150 struct rk_spdif_dev *spdif = snd_soc_dai_get_drvdata(dai);
151 int ret;
152
153 switch (cmd) {
154 case SNDRV_PCM_TRIGGER_START:
155 case SNDRV_PCM_TRIGGER_RESUME:
156 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
157 ret = regmap_update_bits(spdif->regmap, SPDIF_DMACR,
158 SPDIF_DMACR_TDE_ENABLE |
159 SPDIF_DMACR_TDL_MASK,
160 SPDIF_DMACR_TDE_ENABLE |
161 SPDIF_DMACR_TDL(16));
162
163 if (ret != 0)
164 return ret;
165
166 ret = regmap_update_bits(spdif->regmap, SPDIF_XFER,
167 SPDIF_XFER_TXS_START,
168 SPDIF_XFER_TXS_START);
169 break;
170 case SNDRV_PCM_TRIGGER_SUSPEND:
171 case SNDRV_PCM_TRIGGER_STOP:
172 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
173 ret = regmap_update_bits(spdif->regmap, SPDIF_DMACR,
174 SPDIF_DMACR_TDE_ENABLE,
175 SPDIF_DMACR_TDE_DISABLE);
176
177 if (ret != 0)
178 return ret;
179
180 ret = regmap_update_bits(spdif->regmap, SPDIF_XFER,
181 SPDIF_XFER_TXS_START,
182 SPDIF_XFER_TXS_STOP);
183 break;
184 default:
185 ret = -EINVAL;
186 break;
187 }
188
189 return ret;
190}
191
192static int rk_spdif_dai_probe(struct snd_soc_dai *dai)
193{
194 struct rk_spdif_dev *spdif = snd_soc_dai_get_drvdata(dai);
195
196 dai->playback_dma_data = &spdif->playback_dma_data;
197
198 return 0;
199}
200
201static const struct snd_soc_dai_ops rk_spdif_dai_ops = {
202 .hw_params = rk_spdif_hw_params,
203 .trigger = rk_spdif_trigger,
204};
205
206static struct snd_soc_dai_driver rk_spdif_dai = {
207 .probe = rk_spdif_dai_probe,
208 .playback = {
209 .stream_name = "Playback",
210 .channels_min = 2,
211 .channels_max = 2,
212 .rates = (SNDRV_PCM_RATE_32000 |
213 SNDRV_PCM_RATE_44100 |
214 SNDRV_PCM_RATE_48000 |
215 SNDRV_PCM_RATE_96000 |
216 SNDRV_PCM_RATE_192000),
217 .formats = (SNDRV_PCM_FMTBIT_S16_LE |
218 SNDRV_PCM_FMTBIT_S20_3LE |
219 SNDRV_PCM_FMTBIT_S24_LE),
220 },
221 .ops = &rk_spdif_dai_ops,
222};
223
224static const struct snd_soc_component_driver rk_spdif_component = {
225 .name = "rockchip-spdif",
226};
227
228static bool rk_spdif_wr_reg(struct device *dev, unsigned int reg)
229{
230 switch (reg) {
231 case SPDIF_CFGR:
232 case SPDIF_DMACR:
233 case SPDIF_INTCR:
234 case SPDIF_XFER:
235 case SPDIF_SMPDR:
236 return true;
237 default:
238 return false;
239 }
240}
241
242static bool rk_spdif_rd_reg(struct device *dev, unsigned int reg)
243{
244 switch (reg) {
245 case SPDIF_CFGR:
246 case SPDIF_SDBLR:
247 case SPDIF_INTCR:
248 case SPDIF_INTSR:
249 case SPDIF_XFER:
250 return true;
251 default:
252 return false;
253 }
254}
255
256static bool rk_spdif_volatile_reg(struct device *dev, unsigned int reg)
257{
258 switch (reg) {
259 case SPDIF_INTSR:
260 case SPDIF_SDBLR:
261 return true;
262 default:
263 return false;
264 }
265}
266
267static const struct regmap_config rk_spdif_regmap_config = {
268 .reg_bits = 32,
269 .reg_stride = 4,
270 .val_bits = 32,
271 .max_register = SPDIF_SMPDR,
272 .writeable_reg = rk_spdif_wr_reg,
273 .readable_reg = rk_spdif_rd_reg,
274 .volatile_reg = rk_spdif_volatile_reg,
275 .cache_type = REGCACHE_FLAT,
276};
277
278static int rk_spdif_probe(struct platform_device *pdev)
279{
280 struct device_node *np = pdev->dev.of_node;
281 struct rk_spdif_dev *spdif;
282 const struct of_device_id *match;
283 struct resource *res;
284 void __iomem *regs;
285 int ret;
286
287 match = of_match_node(rk_spdif_match, np);
288 if (match->data == (void *)RK_SPDIF_RK3288) {
289 struct regmap *grf;
290
291 grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
292 if (IS_ERR(grf)) {
293 dev_err(&pdev->dev,
294 "rockchip_spdif missing 'rockchip,grf' \n");
295 return PTR_ERR(grf);
296 }
297
298
299
300
301 regmap_write(grf, RK3288_GRF_SOC_CON2, BIT(1) << 16);
302 }
303
304 spdif = devm_kzalloc(&pdev->dev, sizeof(*spdif), GFP_KERNEL);
305 if (!spdif)
306 return -ENOMEM;
307
308 spdif->hclk = devm_clk_get(&pdev->dev, "hclk");
309 if (IS_ERR(spdif->hclk))
310 return PTR_ERR(spdif->hclk);
311
312 spdif->mclk = devm_clk_get(&pdev->dev, "mclk");
313 if (IS_ERR(spdif->mclk))
314 return PTR_ERR(spdif->mclk);
315
316 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
317 regs = devm_ioremap_resource(&pdev->dev, res);
318 if (IS_ERR(regs))
319 return PTR_ERR(regs);
320
321 spdif->regmap = devm_regmap_init_mmio_clk(&pdev->dev, "hclk", regs,
322 &rk_spdif_regmap_config);
323 if (IS_ERR(spdif->regmap))
324 return PTR_ERR(spdif->regmap);
325
326 spdif->playback_dma_data.addr = res->start + SPDIF_SMPDR;
327 spdif->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
328 spdif->playback_dma_data.maxburst = 4;
329
330 spdif->dev = &pdev->dev;
331 dev_set_drvdata(&pdev->dev, spdif);
332
333 pm_runtime_enable(&pdev->dev);
334 if (!pm_runtime_enabled(&pdev->dev)) {
335 ret = rk_spdif_runtime_resume(&pdev->dev);
336 if (ret)
337 goto err_pm_runtime;
338 }
339
340 ret = devm_snd_soc_register_component(&pdev->dev,
341 &rk_spdif_component,
342 &rk_spdif_dai, 1);
343 if (ret) {
344 dev_err(&pdev->dev, "Could not register DAI\n");
345 goto err_pm_suspend;
346 }
347
348 ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
349 if (ret) {
350 dev_err(&pdev->dev, "Could not register PCM\n");
351 goto err_pm_suspend;
352 }
353
354 return 0;
355
356err_pm_suspend:
357 if (!pm_runtime_status_suspended(&pdev->dev))
358 rk_spdif_runtime_suspend(&pdev->dev);
359err_pm_runtime:
360 pm_runtime_disable(&pdev->dev);
361
362 return ret;
363}
364
365static int rk_spdif_remove(struct platform_device *pdev)
366{
367 pm_runtime_disable(&pdev->dev);
368 if (!pm_runtime_status_suspended(&pdev->dev))
369 rk_spdif_runtime_suspend(&pdev->dev);
370
371 return 0;
372}
373
374static const struct dev_pm_ops rk_spdif_pm_ops = {
375 SET_RUNTIME_PM_OPS(rk_spdif_runtime_suspend, rk_spdif_runtime_resume,
376 NULL)
377};
378
379static struct platform_driver rk_spdif_driver = {
380 .probe = rk_spdif_probe,
381 .remove = rk_spdif_remove,
382 .driver = {
383 .name = "rockchip-spdif",
384 .of_match_table = of_match_ptr(rk_spdif_match),
385 .pm = &rk_spdif_pm_ops,
386 },
387};
388module_platform_driver(rk_spdif_driver);
389
390MODULE_ALIAS("platform:rockchip-spdif");
391MODULE_DESCRIPTION("ROCKCHIP SPDIF transceiver Interface");
392MODULE_AUTHOR("Sjoerd Simons <sjoerd.simons@collabora.co.uk>");
393MODULE_LICENSE("GPL v2");
394
