4 * (c) 2010 Arnaud Patard <apatard@mandriva.com>
5 * (c) 2010 Arnaud Patard <arnaud.patard@rtp-net.org>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
13 #include <linux/init.h>
14 #include <linux/module.h>
15 #include <linux/platform_device.h>
17 #include <linux/slab.h>
18 #include <linux/mbus.h>
19 #include <linux/delay.h>
20 #include <linux/clk.h>
21 #include <sound/pcm.h>
22 #include <sound/pcm_params.h>
23 #include <sound/soc.h>
24 #include <linux/platform_data/asoc-kirkwood.h>
29 #define DRV_NAME "mvebu-audio"
31 #define KIRKWOOD_I2S_FORMATS \
32 (SNDRV_PCM_FMTBIT_S16_LE | \
33 SNDRV_PCM_FMTBIT_S24_LE | \
34 SNDRV_PCM_FMTBIT_S32_LE)
36 static int kirkwood_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
39 struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(cpu_dai);
43 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
44 case SND_SOC_DAIFMT_RIGHT_J:
45 mask = KIRKWOOD_I2S_CTL_RJ;
47 case SND_SOC_DAIFMT_LEFT_J:
48 mask = KIRKWOOD_I2S_CTL_LJ;
50 case SND_SOC_DAIFMT_I2S:
51 mask = KIRKWOOD_I2S_CTL_I2S;
58 * Set same format for playback and record
59 * This avoids some troubles.
61 value = readl(priv->io+KIRKWOOD_I2S_PLAYCTL);
62 value &= ~KIRKWOOD_I2S_CTL_JUST_MASK;
64 writel(value, priv->io+KIRKWOOD_I2S_PLAYCTL);
66 value = readl(priv->io+KIRKWOOD_I2S_RECCTL);
67 value &= ~KIRKWOOD_I2S_CTL_JUST_MASK;
69 writel(value, priv->io+KIRKWOOD_I2S_RECCTL);
74 static inline void kirkwood_set_dco(void __iomem *io, unsigned long rate)
78 value = KIRKWOOD_DCO_CTL_OFFSET_0;
82 value |= KIRKWOOD_DCO_CTL_FREQ_11;
85 value |= KIRKWOOD_DCO_CTL_FREQ_12;
88 value |= KIRKWOOD_DCO_CTL_FREQ_24;
91 writel(value, io + KIRKWOOD_DCO_CTL);
93 /* wait for dco locked */
96 value = readl(io + KIRKWOOD_DCO_SPCR_STATUS);
97 value &= KIRKWOOD_DCO_SPCR_STATUS_DCO_LOCK;
101 static void kirkwood_set_rate(struct snd_soc_dai *dai,
102 struct kirkwood_dma_data *priv, unsigned long rate)
106 if (IS_ERR(priv->extclk)) {
107 /* use internal dco for the supported rates
108 * defined in kirkwood_i2s_dai */
109 dev_dbg(dai->dev, "%s: dco set rate = %lu\n",
111 kirkwood_set_dco(priv->io, rate);
113 clks_ctrl = KIRKWOOD_MCLK_SOURCE_DCO;
115 /* use the external clock for the other rates
116 * defined in kirkwood_i2s_dai_extclk */
117 dev_dbg(dai->dev, "%s: extclk set rate = %lu -> %lu\n",
118 __func__, rate, 256 * rate);
119 clk_set_rate(priv->extclk, 256 * rate);
121 clks_ctrl = KIRKWOOD_MCLK_SOURCE_EXTCLK;
123 writel(clks_ctrl, priv->io + KIRKWOOD_CLOCKS_CTRL);
126 static int kirkwood_i2s_startup(struct snd_pcm_substream *substream,
127 struct snd_soc_dai *dai)
129 struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
131 snd_soc_dai_set_dma_data(dai, substream, priv);
135 static int kirkwood_i2s_hw_params(struct snd_pcm_substream *substream,
136 struct snd_pcm_hw_params *params,
137 struct snd_soc_dai *dai)
139 struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
140 uint32_t ctl_play, ctl_rec;
141 unsigned int i2s_reg;
142 unsigned long i2s_value;
144 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
145 i2s_reg = KIRKWOOD_I2S_PLAYCTL;
147 i2s_reg = KIRKWOOD_I2S_RECCTL;
150 kirkwood_set_rate(dai, priv, params_rate(params));
152 i2s_value = readl(priv->io+i2s_reg);
153 i2s_value &= ~KIRKWOOD_I2S_CTL_SIZE_MASK;
156 * Size settings in play/rec i2s control regs and play/rec control
157 * regs must be the same.
159 switch (params_format(params)) {
160 case SNDRV_PCM_FORMAT_S16_LE:
161 i2s_value |= KIRKWOOD_I2S_CTL_SIZE_16;
162 ctl_play = KIRKWOOD_PLAYCTL_SIZE_16_C |
163 KIRKWOOD_PLAYCTL_I2S_EN |
164 KIRKWOOD_PLAYCTL_SPDIF_EN;
165 ctl_rec = KIRKWOOD_RECCTL_SIZE_16_C |
166 KIRKWOOD_RECCTL_I2S_EN |
167 KIRKWOOD_RECCTL_SPDIF_EN;
170 * doesn't work... S20_3LE != kirkwood 20bit format ?
172 case SNDRV_PCM_FORMAT_S20_3LE:
173 i2s_value |= KIRKWOOD_I2S_CTL_SIZE_20;
174 ctl_play = KIRKWOOD_PLAYCTL_SIZE_20 |
175 KIRKWOOD_PLAYCTL_I2S_EN;
176 ctl_rec = KIRKWOOD_RECCTL_SIZE_20 |
177 KIRKWOOD_RECCTL_I2S_EN;
180 case SNDRV_PCM_FORMAT_S24_LE:
181 i2s_value |= KIRKWOOD_I2S_CTL_SIZE_24;
182 ctl_play = KIRKWOOD_PLAYCTL_SIZE_24 |
183 KIRKWOOD_PLAYCTL_I2S_EN |
184 KIRKWOOD_PLAYCTL_SPDIF_EN;
185 ctl_rec = KIRKWOOD_RECCTL_SIZE_24 |
186 KIRKWOOD_RECCTL_I2S_EN |
187 KIRKWOOD_RECCTL_SPDIF_EN;
189 case SNDRV_PCM_FORMAT_S32_LE:
190 i2s_value |= KIRKWOOD_I2S_CTL_SIZE_32;
191 ctl_play = KIRKWOOD_PLAYCTL_SIZE_32 |
192 KIRKWOOD_PLAYCTL_I2S_EN;
193 ctl_rec = KIRKWOOD_RECCTL_SIZE_32 |
194 KIRKWOOD_RECCTL_I2S_EN;
200 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
201 if (params_channels(params) == 1)
202 ctl_play |= KIRKWOOD_PLAYCTL_MONO_BOTH;
204 ctl_play |= KIRKWOOD_PLAYCTL_MONO_OFF;
206 priv->ctl_play &= ~(KIRKWOOD_PLAYCTL_MONO_MASK |
207 KIRKWOOD_PLAYCTL_ENABLE_MASK |
208 KIRKWOOD_PLAYCTL_SIZE_MASK);
209 priv->ctl_play |= ctl_play;
211 priv->ctl_rec &= ~KIRKWOOD_RECCTL_SIZE_MASK;
212 priv->ctl_rec |= ctl_rec;
215 writel(i2s_value, priv->io+i2s_reg);
220 static int kirkwood_i2s_play_trigger(struct snd_pcm_substream *substream,
221 int cmd, struct snd_soc_dai *dai)
223 struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
226 ctl = readl(priv->io + KIRKWOOD_PLAYCTL);
227 if (ctl & KIRKWOOD_PLAYCTL_PAUSE) {
228 unsigned timeout = 5000;
230 * The Armada510 spec says that if we enter pause mode, the
231 * busy bit must be read back as clear _twice_. Make sure
232 * we respect that otherwise we get DMA underruns.
236 ctl = readl(priv->io + KIRKWOOD_PLAYCTL);
237 if (!((ctl | value) & KIRKWOOD_PLAYCTL_PLAY_BUSY))
242 if ((ctl | value) & KIRKWOOD_PLAYCTL_PLAY_BUSY)
243 dev_notice(dai->dev, "timed out waiting for busy to deassert: %08x\n",
248 ctl &= ~KIRKWOOD_PLAYCTL_SPDIF_EN; /* i2s */
250 ctl &= ~KIRKWOOD_PLAYCTL_I2S_EN; /* spdif */
253 case SNDRV_PCM_TRIGGER_START:
255 ctl = priv->ctl_play;
256 value = ctl & ~KIRKWOOD_PLAYCTL_ENABLE_MASK;
257 writel(value, priv->io + KIRKWOOD_PLAYCTL);
259 /* enable interrupts */
260 value = readl(priv->io + KIRKWOOD_INT_MASK);
261 value |= KIRKWOOD_INT_CAUSE_PLAY_BYTES;
262 writel(value, priv->io + KIRKWOOD_INT_MASK);
264 /* enable playback */
265 writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
268 case SNDRV_PCM_TRIGGER_STOP:
269 /* stop audio, disable interrupts */
270 ctl |= KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE |
271 KIRKWOOD_PLAYCTL_SPDIF_MUTE;
272 writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
274 value = readl(priv->io + KIRKWOOD_INT_MASK);
275 value &= ~KIRKWOOD_INT_CAUSE_PLAY_BYTES;
276 writel(value, priv->io + KIRKWOOD_INT_MASK);
278 /* disable all playbacks */
279 ctl &= ~KIRKWOOD_PLAYCTL_ENABLE_MASK;
280 writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
283 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
284 case SNDRV_PCM_TRIGGER_SUSPEND:
285 ctl |= KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE |
286 KIRKWOOD_PLAYCTL_SPDIF_MUTE;
287 writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
290 case SNDRV_PCM_TRIGGER_RESUME:
291 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
292 ctl &= ~(KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE |
293 KIRKWOOD_PLAYCTL_SPDIF_MUTE);
294 writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
304 static int kirkwood_i2s_rec_trigger(struct snd_pcm_substream *substream,
305 int cmd, struct snd_soc_dai *dai)
307 struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
310 value = readl(priv->io + KIRKWOOD_RECCTL);
313 case SNDRV_PCM_TRIGGER_START:
317 ctl &= ~KIRKWOOD_RECCTL_SPDIF_EN; /* i2s */
319 ctl &= ~KIRKWOOD_RECCTL_I2S_EN; /* spdif */
321 value = ctl & ~(KIRKWOOD_RECCTL_I2S_EN |
322 KIRKWOOD_RECCTL_SPDIF_EN);
323 writel(value, priv->io + KIRKWOOD_RECCTL);
325 /* enable interrupts */
326 value = readl(priv->io + KIRKWOOD_INT_MASK);
327 value |= KIRKWOOD_INT_CAUSE_REC_BYTES;
328 writel(value, priv->io + KIRKWOOD_INT_MASK);
331 writel(ctl, priv->io + KIRKWOOD_RECCTL);
334 case SNDRV_PCM_TRIGGER_STOP:
335 /* stop audio, disable interrupts */
336 value = readl(priv->io + KIRKWOOD_RECCTL);
337 value |= KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE;
338 writel(value, priv->io + KIRKWOOD_RECCTL);
340 value = readl(priv->io + KIRKWOOD_INT_MASK);
341 value &= ~KIRKWOOD_INT_CAUSE_REC_BYTES;
342 writel(value, priv->io + KIRKWOOD_INT_MASK);
344 /* disable all records */
345 value = readl(priv->io + KIRKWOOD_RECCTL);
346 value &= ~(KIRKWOOD_RECCTL_I2S_EN | KIRKWOOD_RECCTL_SPDIF_EN);
347 writel(value, priv->io + KIRKWOOD_RECCTL);
350 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
351 case SNDRV_PCM_TRIGGER_SUSPEND:
352 value = readl(priv->io + KIRKWOOD_RECCTL);
353 value |= KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE;
354 writel(value, priv->io + KIRKWOOD_RECCTL);
357 case SNDRV_PCM_TRIGGER_RESUME:
358 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
359 value = readl(priv->io + KIRKWOOD_RECCTL);
360 value &= ~(KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE);
361 writel(value, priv->io + KIRKWOOD_RECCTL);
371 static int kirkwood_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
372 struct snd_soc_dai *dai)
374 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
375 return kirkwood_i2s_play_trigger(substream, cmd, dai);
377 return kirkwood_i2s_rec_trigger(substream, cmd, dai);
382 static int kirkwood_i2s_init(struct kirkwood_dma_data *priv)
385 unsigned int reg_data;
387 /* put system in a "safe" state : */
388 /* disable audio interrupts */
389 writel(0xffffffff, priv->io + KIRKWOOD_INT_CAUSE);
390 writel(0, priv->io + KIRKWOOD_INT_MASK);
392 reg_data = readl(priv->io + 0x1200);
393 reg_data &= (~(0x333FF8));
394 reg_data |= 0x111D18;
395 writel(reg_data, priv->io + 0x1200);
399 reg_data = readl(priv->io + 0x1200);
400 reg_data &= (~(0x333FF8));
401 reg_data |= 0x111D18;
402 writel(reg_data, priv->io + 0x1200);
404 /* disable playback/record */
405 value = readl(priv->io + KIRKWOOD_PLAYCTL);
406 value &= ~KIRKWOOD_PLAYCTL_ENABLE_MASK;
407 writel(value, priv->io + KIRKWOOD_PLAYCTL);
409 value = readl(priv->io + KIRKWOOD_RECCTL);
410 value &= ~(KIRKWOOD_RECCTL_I2S_EN | KIRKWOOD_RECCTL_SPDIF_EN);
411 writel(value, priv->io + KIRKWOOD_RECCTL);
417 static const struct snd_soc_dai_ops kirkwood_i2s_dai_ops = {
418 .startup = kirkwood_i2s_startup,
419 .trigger = kirkwood_i2s_trigger,
420 .hw_params = kirkwood_i2s_hw_params,
421 .set_fmt = kirkwood_i2s_set_fmt,
424 static struct snd_soc_dai_driver kirkwood_i2s_dai[2] = {
431 .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
432 SNDRV_PCM_RATE_96000,
433 .formats = KIRKWOOD_I2S_FORMATS,
438 .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
439 SNDRV_PCM_RATE_96000,
440 .formats = KIRKWOOD_I2S_FORMATS,
442 .ops = &kirkwood_i2s_dai_ops,
450 .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
451 SNDRV_PCM_RATE_96000,
452 .formats = KIRKWOOD_I2S_FORMATS,
457 .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
458 SNDRV_PCM_RATE_96000,
459 .formats = KIRKWOOD_I2S_FORMATS,
461 .ops = &kirkwood_i2s_dai_ops,
465 static struct snd_soc_dai_driver kirkwood_i2s_dai_extclk[2] = {
472 .rates = SNDRV_PCM_RATE_8000_192000 |
473 SNDRV_PCM_RATE_CONTINUOUS |
475 .formats = KIRKWOOD_I2S_FORMATS,
480 .rates = SNDRV_PCM_RATE_8000_192000 |
481 SNDRV_PCM_RATE_CONTINUOUS |
483 .formats = KIRKWOOD_I2S_FORMATS,
485 .ops = &kirkwood_i2s_dai_ops,
493 .rates = SNDRV_PCM_RATE_8000_192000 |
494 SNDRV_PCM_RATE_CONTINUOUS |
496 .formats = KIRKWOOD_I2S_FORMATS,
501 .rates = SNDRV_PCM_RATE_8000_192000 |
502 SNDRV_PCM_RATE_CONTINUOUS |
504 .formats = KIRKWOOD_I2S_FORMATS,
506 .ops = &kirkwood_i2s_dai_ops,
510 static const struct snd_soc_component_driver kirkwood_i2s_component = {
514 static int kirkwood_i2s_dev_probe(struct platform_device *pdev)
516 struct kirkwood_asoc_platform_data *data = pdev->dev.platform_data;
517 struct snd_soc_dai_driver *soc_dai = kirkwood_i2s_dai;
518 struct kirkwood_dma_data *priv;
519 struct resource *mem;
520 struct device_node *np = pdev->dev.of_node;
523 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
525 dev_err(&pdev->dev, "allocation failed\n");
528 dev_set_drvdata(&pdev->dev, priv);
530 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
531 priv->io = devm_ioremap_resource(&pdev->dev, mem);
532 if (IS_ERR(priv->io))
533 return PTR_ERR(priv->io);
535 priv->irq = platform_get_irq(pdev, 0);
536 if (priv->irq <= 0) {
537 dev_err(&pdev->dev, "platform_get_irq failed\n");
542 priv->burst = 128; /* might be 32 or 128 */
544 priv->burst = data->burst;
546 dev_err(&pdev->dev, "no DT nor platform data ?!\n");
550 priv->clk = devm_clk_get(&pdev->dev, np ? "internal" : NULL);
551 if (IS_ERR(priv->clk)) {
552 dev_err(&pdev->dev, "no clock\n");
553 return PTR_ERR(priv->clk);
556 err = clk_prepare_enable(priv->clk);
560 priv->extclk = devm_clk_get(&pdev->dev, "extclk");
561 if (IS_ERR(priv->extclk)) {
562 if (PTR_ERR(priv->extclk) == -EPROBE_DEFER)
563 return -EPROBE_DEFER;
565 if (priv->extclk == priv->clk) {
566 devm_clk_put(&pdev->dev, priv->extclk);
567 priv->extclk = ERR_PTR(-EINVAL);
569 dev_info(&pdev->dev, "found external clock\n");
570 clk_prepare_enable(priv->extclk);
571 soc_dai = kirkwood_i2s_dai_extclk;
575 /* Some sensible defaults - this reflects the powerup values */
576 priv->ctl_play = KIRKWOOD_PLAYCTL_SIZE_24;
577 priv->ctl_rec = KIRKWOOD_RECCTL_SIZE_24;
579 /* Select the burst size */
580 if (priv->burst == 32) {
581 priv->ctl_play |= KIRKWOOD_PLAYCTL_BURST_32;
582 priv->ctl_rec |= KIRKWOOD_RECCTL_BURST_32;
584 priv->ctl_play |= KIRKWOOD_PLAYCTL_BURST_128;
585 priv->ctl_rec |= KIRKWOOD_RECCTL_BURST_128;
588 err = snd_soc_register_component(&pdev->dev, &kirkwood_i2s_component,
591 dev_err(&pdev->dev, "snd_soc_register_component failed\n");
595 err = snd_soc_register_platform(&pdev->dev, &kirkwood_soc_platform);
597 dev_err(&pdev->dev, "snd_soc_register_platform failed\n");
601 kirkwood_i2s_init(priv);
605 snd_soc_unregister_component(&pdev->dev);
607 if (!IS_ERR(priv->extclk))
608 clk_disable_unprepare(priv->extclk);
609 clk_disable_unprepare(priv->clk);
614 static int kirkwood_i2s_dev_remove(struct platform_device *pdev)
616 struct kirkwood_dma_data *priv = dev_get_drvdata(&pdev->dev);
618 snd_soc_unregister_platform(&pdev->dev);
619 snd_soc_unregister_component(&pdev->dev);
621 if (!IS_ERR(priv->extclk))
622 clk_disable_unprepare(priv->extclk);
623 clk_disable_unprepare(priv->clk);
629 static struct of_device_id mvebu_audio_of_match[] = {
630 { .compatible = "marvell,kirkwood-audio" },
631 { .compatible = "marvell,dove-audio" },
634 MODULE_DEVICE_TABLE(of, mvebu_audio_of_match);
637 static struct platform_driver kirkwood_i2s_driver = {
638 .probe = kirkwood_i2s_dev_probe,
639 .remove = kirkwood_i2s_dev_remove,
642 .owner = THIS_MODULE,
643 .of_match_table = of_match_ptr(mvebu_audio_of_match),
647 module_platform_driver(kirkwood_i2s_driver);
649 /* Module information */
650 MODULE_AUTHOR("Arnaud Patard, <arnaud.patard@rtp-net.org>");
651 MODULE_DESCRIPTION("Kirkwood I2S SoC Interface");
652 MODULE_LICENSE("GPL");
653 MODULE_ALIAS("platform:mvebu-audio");