2 * tegra30_i2s.c - Tegra30 I2S driver
4 * Author: Stephen Warren <swarren@nvidia.com>
5 * Copyright (c) 2010-2012, NVIDIA CORPORATION. All rights reserved.
7 * Based on code copyright/by:
9 * Copyright (c) 2009-2010, NVIDIA Corporation.
10 * Scott Peterson <speterson@nvidia.com>
12 * Copyright (C) 2010 Google, Inc.
13 * Iliyan Malchev <malchev@google.com>
15 * This program is free software; you can redistribute it and/or modify it
16 * under the terms and conditions of the GNU General Public License,
17 * version 2, as published by the Free Software Foundation.
19 * This program is distributed in the hope it will be useful, but WITHOUT
20 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
21 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
24 * You should have received a copy of the GNU General Public License
25 * along with this program. If not, see <http://www.gnu.org/licenses/>.
28 #include <linux/clk.h>
29 #include <linux/device.h>
31 #include <linux/module.h>
33 #include <linux/platform_device.h>
34 #include <linux/pm_runtime.h>
35 #include <linux/regmap.h>
36 #include <linux/slab.h>
37 #include <sound/core.h>
38 #include <sound/pcm.h>
39 #include <sound/pcm_params.h>
40 #include <sound/soc.h>
42 #include "tegra30_ahub.h"
43 #include "tegra30_i2s.h"
45 #define DRV_NAME "tegra30-i2s"
47 static int tegra30_i2s_runtime_suspend(struct device *dev)
49 struct tegra30_i2s *i2s = dev_get_drvdata(dev);
51 regcache_cache_only(i2s->regmap, true);
53 clk_disable(i2s->clk_i2s);
58 static int tegra30_i2s_runtime_resume(struct device *dev)
60 struct tegra30_i2s *i2s = dev_get_drvdata(dev);
63 ret = clk_enable(i2s->clk_i2s);
65 dev_err(dev, "clk_enable failed: %d\n", ret);
69 regcache_cache_only(i2s->regmap, false);
74 int tegra30_i2s_startup(struct snd_pcm_substream *substream,
75 struct snd_soc_dai *dai)
77 struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
80 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
81 ret = tegra30_ahub_allocate_tx_fifo(&i2s->playback_fifo_cif,
82 &i2s->playback_dma_data.addr,
83 &i2s->playback_dma_data.req_sel);
84 i2s->playback_dma_data.wrap = 4;
85 i2s->playback_dma_data.width = 32;
86 tegra30_ahub_set_rx_cif_source(i2s->playback_i2s_cif,
87 i2s->playback_fifo_cif);
89 ret = tegra30_ahub_allocate_rx_fifo(&i2s->capture_fifo_cif,
90 &i2s->capture_dma_data.addr,
91 &i2s->capture_dma_data.req_sel);
92 i2s->capture_dma_data.wrap = 4;
93 i2s->capture_dma_data.width = 32;
94 tegra30_ahub_set_rx_cif_source(i2s->capture_fifo_cif,
95 i2s->capture_i2s_cif);
101 void tegra30_i2s_shutdown(struct snd_pcm_substream *substream,
102 struct snd_soc_dai *dai)
104 struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
106 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
107 tegra30_ahub_unset_rx_cif_source(i2s->playback_i2s_cif);
108 tegra30_ahub_free_tx_fifo(i2s->playback_fifo_cif);
110 tegra30_ahub_unset_rx_cif_source(i2s->capture_fifo_cif);
111 tegra30_ahub_free_rx_fifo(i2s->capture_fifo_cif);
115 static int tegra30_i2s_set_fmt(struct snd_soc_dai *dai,
118 struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
119 unsigned int mask, val;
121 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
122 case SND_SOC_DAIFMT_NB_NF:
128 mask = TEGRA30_I2S_CTRL_MASTER_ENABLE;
129 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
130 case SND_SOC_DAIFMT_CBS_CFS:
131 val = TEGRA30_I2S_CTRL_MASTER_ENABLE;
133 case SND_SOC_DAIFMT_CBM_CFM:
139 mask |= TEGRA30_I2S_CTRL_FRAME_FORMAT_MASK |
140 TEGRA30_I2S_CTRL_LRCK_MASK;
141 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
142 case SND_SOC_DAIFMT_DSP_A:
143 val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_FSYNC;
144 val |= TEGRA30_I2S_CTRL_LRCK_L_LOW;
146 case SND_SOC_DAIFMT_DSP_B:
147 val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_FSYNC;
148 val |= TEGRA30_I2S_CTRL_LRCK_R_LOW;
150 case SND_SOC_DAIFMT_I2S:
151 val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_LRCK;
152 val |= TEGRA30_I2S_CTRL_LRCK_L_LOW;
154 case SND_SOC_DAIFMT_RIGHT_J:
155 val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_LRCK;
156 val |= TEGRA30_I2S_CTRL_LRCK_L_LOW;
158 case SND_SOC_DAIFMT_LEFT_J:
159 val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_LRCK;
160 val |= TEGRA30_I2S_CTRL_LRCK_L_LOW;
166 pm_runtime_get_sync(dai->dev);
167 regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL, mask, val);
168 pm_runtime_put(dai->dev);
173 static int tegra30_i2s_hw_params(struct snd_pcm_substream *substream,
174 struct snd_pcm_hw_params *params,
175 struct snd_soc_dai *dai)
177 struct device *dev = dai->dev;
178 struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
179 unsigned int mask, val, reg;
180 int ret, sample_size, srate, i2sclock, bitcnt;
182 if (params_channels(params) != 2)
185 mask = TEGRA30_I2S_CTRL_BIT_SIZE_MASK;
186 switch (params_format(params)) {
187 case SNDRV_PCM_FORMAT_S16_LE:
188 val = TEGRA30_I2S_CTRL_BIT_SIZE_16;
195 regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL, mask, val);
197 srate = params_rate(params);
199 /* Final "* 2" required by Tegra hardware */
200 i2sclock = srate * params_channels(params) * sample_size * 2;
202 bitcnt = (i2sclock / (2 * srate)) - 1;
203 if (bitcnt < 0 || bitcnt > TEGRA30_I2S_TIMING_CHANNEL_BIT_COUNT_MASK_US)
206 ret = clk_set_rate(i2s->clk_i2s, i2sclock);
208 dev_err(dev, "Can't set I2S clock rate: %d\n", ret);
212 val = bitcnt << TEGRA30_I2S_TIMING_CHANNEL_BIT_COUNT_SHIFT;
214 if (i2sclock % (2 * srate))
215 val |= TEGRA30_I2S_TIMING_NON_SYM_ENABLE;
217 regmap_write(i2s->regmap, TEGRA30_I2S_TIMING, val);
219 val = (0 << TEGRA30_AUDIOCIF_CTRL_FIFO_THRESHOLD_SHIFT) |
220 (1 << TEGRA30_AUDIOCIF_CTRL_AUDIO_CHANNELS_SHIFT) |
221 (1 << TEGRA30_AUDIOCIF_CTRL_CLIENT_CHANNELS_SHIFT) |
222 TEGRA30_AUDIOCIF_CTRL_AUDIO_BITS_16 |
223 TEGRA30_AUDIOCIF_CTRL_CLIENT_BITS_16;
225 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
226 val |= TEGRA30_AUDIOCIF_CTRL_DIRECTION_RX;
227 reg = TEGRA30_I2S_CIF_RX_CTRL;
229 val |= TEGRA30_AUDIOCIF_CTRL_DIRECTION_TX;
230 reg = TEGRA30_I2S_CIF_RX_CTRL;
233 regmap_write(i2s->regmap, reg, val);
235 val = (1 << TEGRA30_I2S_OFFSET_RX_DATA_OFFSET_SHIFT) |
236 (1 << TEGRA30_I2S_OFFSET_TX_DATA_OFFSET_SHIFT);
237 regmap_write(i2s->regmap, TEGRA30_I2S_OFFSET, val);
242 static void tegra30_i2s_start_playback(struct tegra30_i2s *i2s)
244 tegra30_ahub_enable_tx_fifo(i2s->playback_fifo_cif);
245 regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL,
246 TEGRA30_I2S_CTRL_XFER_EN_TX,
247 TEGRA30_I2S_CTRL_XFER_EN_TX);
250 static void tegra30_i2s_stop_playback(struct tegra30_i2s *i2s)
252 tegra30_ahub_disable_tx_fifo(i2s->playback_fifo_cif);
253 regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL,
254 TEGRA30_I2S_CTRL_XFER_EN_TX, 0);
257 static void tegra30_i2s_start_capture(struct tegra30_i2s *i2s)
259 tegra30_ahub_enable_rx_fifo(i2s->capture_fifo_cif);
260 regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL,
261 TEGRA30_I2S_CTRL_XFER_EN_RX,
262 TEGRA30_I2S_CTRL_XFER_EN_RX);
265 static void tegra30_i2s_stop_capture(struct tegra30_i2s *i2s)
267 tegra30_ahub_disable_rx_fifo(i2s->capture_fifo_cif);
268 regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL,
269 TEGRA30_I2S_CTRL_XFER_EN_RX, 0);
272 static int tegra30_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
273 struct snd_soc_dai *dai)
275 struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
278 case SNDRV_PCM_TRIGGER_START:
279 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
280 case SNDRV_PCM_TRIGGER_RESUME:
281 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
282 tegra30_i2s_start_playback(i2s);
284 tegra30_i2s_start_capture(i2s);
286 case SNDRV_PCM_TRIGGER_STOP:
287 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
288 case SNDRV_PCM_TRIGGER_SUSPEND:
289 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
290 tegra30_i2s_stop_playback(i2s);
292 tegra30_i2s_stop_capture(i2s);
301 static int tegra30_i2s_probe(struct snd_soc_dai *dai)
303 struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
305 dai->capture_dma_data = &i2s->capture_dma_data;
306 dai->playback_dma_data = &i2s->playback_dma_data;
311 static struct snd_soc_dai_ops tegra30_i2s_dai_ops = {
312 .startup = tegra30_i2s_startup,
313 .shutdown = tegra30_i2s_shutdown,
314 .set_fmt = tegra30_i2s_set_fmt,
315 .hw_params = tegra30_i2s_hw_params,
316 .trigger = tegra30_i2s_trigger,
319 static const struct snd_soc_dai_driver tegra30_i2s_dai_template = {
320 .probe = tegra30_i2s_probe,
322 .stream_name = "Playback",
325 .rates = SNDRV_PCM_RATE_8000_96000,
326 .formats = SNDRV_PCM_FMTBIT_S16_LE,
329 .stream_name = "Capture",
332 .rates = SNDRV_PCM_RATE_8000_96000,
333 .formats = SNDRV_PCM_FMTBIT_S16_LE,
335 .ops = &tegra30_i2s_dai_ops,
336 .symmetric_rates = 1,
339 static bool tegra30_i2s_wr_rd_reg(struct device *dev, unsigned int reg)
342 case TEGRA30_I2S_CTRL:
343 case TEGRA30_I2S_TIMING:
344 case TEGRA30_I2S_OFFSET:
345 case TEGRA30_I2S_CH_CTRL:
346 case TEGRA30_I2S_SLOT_CTRL:
347 case TEGRA30_I2S_CIF_RX_CTRL:
348 case TEGRA30_I2S_CIF_TX_CTRL:
349 case TEGRA30_I2S_FLOWCTL:
350 case TEGRA30_I2S_TX_STEP:
351 case TEGRA30_I2S_FLOW_STATUS:
352 case TEGRA30_I2S_FLOW_TOTAL:
353 case TEGRA30_I2S_FLOW_OVER:
354 case TEGRA30_I2S_FLOW_UNDER:
355 case TEGRA30_I2S_LCOEF_1_4_0:
356 case TEGRA30_I2S_LCOEF_1_4_1:
357 case TEGRA30_I2S_LCOEF_1_4_2:
358 case TEGRA30_I2S_LCOEF_1_4_3:
359 case TEGRA30_I2S_LCOEF_1_4_4:
360 case TEGRA30_I2S_LCOEF_1_4_5:
361 case TEGRA30_I2S_LCOEF_2_4_0:
362 case TEGRA30_I2S_LCOEF_2_4_1:
363 case TEGRA30_I2S_LCOEF_2_4_2:
370 static bool tegra30_i2s_volatile_reg(struct device *dev, unsigned int reg)
373 case TEGRA30_I2S_FLOW_STATUS:
374 case TEGRA30_I2S_FLOW_TOTAL:
375 case TEGRA30_I2S_FLOW_OVER:
376 case TEGRA30_I2S_FLOW_UNDER:
383 static const struct regmap_config tegra30_i2s_regmap_config = {
387 .max_register = TEGRA30_I2S_LCOEF_2_4_2,
388 .writeable_reg = tegra30_i2s_wr_rd_reg,
389 .readable_reg = tegra30_i2s_wr_rd_reg,
390 .volatile_reg = tegra30_i2s_volatile_reg,
391 .cache_type = REGCACHE_RBTREE,
394 static __devinit int tegra30_i2s_platform_probe(struct platform_device *pdev)
396 struct tegra30_i2s *i2s;
398 struct resource *mem, *memregion;
402 i2s = devm_kzalloc(&pdev->dev, sizeof(struct tegra30_i2s), GFP_KERNEL);
404 dev_err(&pdev->dev, "Can't allocate tegra30_i2s\n");
408 dev_set_drvdata(&pdev->dev, i2s);
410 i2s->dai = tegra30_i2s_dai_template;
411 i2s->dai.name = dev_name(&pdev->dev);
413 ret = of_property_read_u32_array(pdev->dev.of_node,
414 "nvidia,ahub-cif-ids", cif_ids,
415 ARRAY_SIZE(cif_ids));
419 i2s->playback_i2s_cif = cif_ids[0];
420 i2s->capture_i2s_cif = cif_ids[1];
422 i2s->clk_i2s = clk_get(&pdev->dev, NULL);
423 if (IS_ERR(i2s->clk_i2s)) {
424 dev_err(&pdev->dev, "Can't retrieve i2s clock\n");
425 ret = PTR_ERR(i2s->clk_i2s);
429 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
431 dev_err(&pdev->dev, "No memory resource\n");
436 memregion = devm_request_mem_region(&pdev->dev, mem->start,
437 resource_size(mem), DRV_NAME);
439 dev_err(&pdev->dev, "Memory region already claimed\n");
444 regs = devm_ioremap(&pdev->dev, mem->start, resource_size(mem));
446 dev_err(&pdev->dev, "ioremap failed\n");
451 i2s->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
452 &tegra30_i2s_regmap_config);
453 if (IS_ERR(i2s->regmap)) {
454 dev_err(&pdev->dev, "regmap init failed\n");
455 ret = PTR_ERR(i2s->regmap);
458 regcache_cache_only(i2s->regmap, true);
460 pm_runtime_enable(&pdev->dev);
461 if (!pm_runtime_enabled(&pdev->dev)) {
462 ret = tegra30_i2s_runtime_resume(&pdev->dev);
467 ret = snd_soc_register_dai(&pdev->dev, &i2s->dai);
469 dev_err(&pdev->dev, "Could not register DAI: %d\n", ret);
474 ret = tegra_pcm_platform_register(&pdev->dev);
476 dev_err(&pdev->dev, "Could not register PCM: %d\n", ret);
477 goto err_unregister_dai;
483 snd_soc_unregister_dai(&pdev->dev);
485 if (!pm_runtime_status_suspended(&pdev->dev))
486 tegra30_i2s_runtime_suspend(&pdev->dev);
488 pm_runtime_disable(&pdev->dev);
490 clk_put(i2s->clk_i2s);
495 static int __devexit tegra30_i2s_platform_remove(struct platform_device *pdev)
497 struct tegra30_i2s *i2s = dev_get_drvdata(&pdev->dev);
499 pm_runtime_disable(&pdev->dev);
500 if (!pm_runtime_status_suspended(&pdev->dev))
501 tegra30_i2s_runtime_suspend(&pdev->dev);
503 tegra_pcm_platform_unregister(&pdev->dev);
504 snd_soc_unregister_dai(&pdev->dev);
506 clk_put(i2s->clk_i2s);
511 static const struct of_device_id tegra30_i2s_of_match[] __devinitconst = {
512 { .compatible = "nvidia,tegra30-i2s", },
516 static const struct dev_pm_ops tegra30_i2s_pm_ops __devinitconst = {
517 SET_RUNTIME_PM_OPS(tegra30_i2s_runtime_suspend,
518 tegra30_i2s_runtime_resume, NULL)
521 static struct platform_driver tegra30_i2s_driver = {
524 .owner = THIS_MODULE,
525 .of_match_table = tegra30_i2s_of_match,
526 .pm = &tegra30_i2s_pm_ops,
528 .probe = tegra30_i2s_platform_probe,
529 .remove = __devexit_p(tegra30_i2s_platform_remove),
531 module_platform_driver(tegra30_i2s_driver);
533 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
534 MODULE_DESCRIPTION("Tegra30 I2S ASoC driver");
535 MODULE_LICENSE("GPL");
536 MODULE_ALIAS("platform:" DRV_NAME);
537 MODULE_DEVICE_TABLE(of, tegra30_i2s_of_match);