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 inline void tegra30_i2s_write(struct tegra30_i2s
*i2s
, u32 reg
, u32 val
)
49 regmap_write(i2s
->regmap
, reg
, val
);
52 static inline u32
tegra30_i2s_read(struct tegra30_i2s
*i2s
, u32 reg
)
55 regmap_read(i2s
->regmap
, reg
, &val
);
59 static int tegra30_i2s_runtime_suspend(struct device
*dev
)
61 struct tegra30_i2s
*i2s
= dev_get_drvdata(dev
);
63 regcache_cache_only(i2s
->regmap
, true);
65 clk_disable_unprepare(i2s
->clk_i2s
);
70 static int tegra30_i2s_runtime_resume(struct device
*dev
)
72 struct tegra30_i2s
*i2s
= dev_get_drvdata(dev
);
75 ret
= clk_prepare_enable(i2s
->clk_i2s
);
77 dev_err(dev
, "clk_enable failed: %d\n", ret
);
81 regcache_cache_only(i2s
->regmap
, false);
86 int tegra30_i2s_startup(struct snd_pcm_substream
*substream
,
87 struct snd_soc_dai
*dai
)
89 struct tegra30_i2s
*i2s
= snd_soc_dai_get_drvdata(dai
);
92 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
93 ret
= tegra30_ahub_allocate_tx_fifo(&i2s
->playback_fifo_cif
,
94 &i2s
->playback_dma_data
.addr
,
95 &i2s
->playback_dma_data
.req_sel
);
96 i2s
->playback_dma_data
.wrap
= 4;
97 i2s
->playback_dma_data
.width
= 32;
98 tegra30_ahub_set_rx_cif_source(i2s
->playback_i2s_cif
,
99 i2s
->playback_fifo_cif
);
101 ret
= tegra30_ahub_allocate_rx_fifo(&i2s
->capture_fifo_cif
,
102 &i2s
->capture_dma_data
.addr
,
103 &i2s
->capture_dma_data
.req_sel
);
104 i2s
->capture_dma_data
.wrap
= 4;
105 i2s
->capture_dma_data
.width
= 32;
106 tegra30_ahub_set_rx_cif_source(i2s
->capture_fifo_cif
,
107 i2s
->capture_i2s_cif
);
113 void tegra30_i2s_shutdown(struct snd_pcm_substream
*substream
,
114 struct snd_soc_dai
*dai
)
116 struct tegra30_i2s
*i2s
= snd_soc_dai_get_drvdata(dai
);
118 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
119 tegra30_ahub_unset_rx_cif_source(i2s
->playback_i2s_cif
);
120 tegra30_ahub_free_tx_fifo(i2s
->playback_fifo_cif
);
122 tegra30_ahub_unset_rx_cif_source(i2s
->capture_fifo_cif
);
123 tegra30_ahub_free_rx_fifo(i2s
->capture_fifo_cif
);
127 static int tegra30_i2s_set_fmt(struct snd_soc_dai
*dai
,
130 struct tegra30_i2s
*i2s
= snd_soc_dai_get_drvdata(dai
);
132 switch (fmt
& SND_SOC_DAIFMT_INV_MASK
) {
133 case SND_SOC_DAIFMT_NB_NF
:
139 i2s
->reg_ctrl
&= ~TEGRA30_I2S_CTRL_MASTER_ENABLE
;
140 switch (fmt
& SND_SOC_DAIFMT_MASTER_MASK
) {
141 case SND_SOC_DAIFMT_CBS_CFS
:
142 i2s
->reg_ctrl
|= TEGRA30_I2S_CTRL_MASTER_ENABLE
;
144 case SND_SOC_DAIFMT_CBM_CFM
:
150 i2s
->reg_ctrl
&= ~(TEGRA30_I2S_CTRL_FRAME_FORMAT_MASK
|
151 TEGRA30_I2S_CTRL_LRCK_MASK
);
152 switch (fmt
& SND_SOC_DAIFMT_FORMAT_MASK
) {
153 case SND_SOC_DAIFMT_DSP_A
:
154 i2s
->reg_ctrl
|= TEGRA30_I2S_CTRL_FRAME_FORMAT_FSYNC
;
155 i2s
->reg_ctrl
|= TEGRA30_I2S_CTRL_LRCK_L_LOW
;
157 case SND_SOC_DAIFMT_DSP_B
:
158 i2s
->reg_ctrl
|= TEGRA30_I2S_CTRL_FRAME_FORMAT_FSYNC
;
159 i2s
->reg_ctrl
|= TEGRA30_I2S_CTRL_LRCK_R_LOW
;
161 case SND_SOC_DAIFMT_I2S
:
162 i2s
->reg_ctrl
|= TEGRA30_I2S_CTRL_FRAME_FORMAT_LRCK
;
163 i2s
->reg_ctrl
|= TEGRA30_I2S_CTRL_LRCK_L_LOW
;
165 case SND_SOC_DAIFMT_RIGHT_J
:
166 i2s
->reg_ctrl
|= TEGRA30_I2S_CTRL_FRAME_FORMAT_LRCK
;
167 i2s
->reg_ctrl
|= TEGRA30_I2S_CTRL_LRCK_L_LOW
;
169 case SND_SOC_DAIFMT_LEFT_J
:
170 i2s
->reg_ctrl
|= TEGRA30_I2S_CTRL_FRAME_FORMAT_LRCK
;
171 i2s
->reg_ctrl
|= TEGRA30_I2S_CTRL_LRCK_L_LOW
;
180 static int tegra30_i2s_hw_params(struct snd_pcm_substream
*substream
,
181 struct snd_pcm_hw_params
*params
,
182 struct snd_soc_dai
*dai
)
184 struct device
*dev
= substream
->pcm
->card
->dev
;
185 struct tegra30_i2s
*i2s
= snd_soc_dai_get_drvdata(dai
);
187 int ret
, sample_size
, srate
, i2sclock
, bitcnt
;
189 if (params_channels(params
) != 2)
192 i2s
->reg_ctrl
&= ~TEGRA30_I2S_CTRL_BIT_SIZE_MASK
;
193 switch (params_format(params
)) {
194 case SNDRV_PCM_FORMAT_S16_LE
:
195 i2s
->reg_ctrl
|= TEGRA30_I2S_CTRL_BIT_SIZE_16
;
202 srate
= params_rate(params
);
204 /* Final "* 2" required by Tegra hardware */
205 i2sclock
= srate
* params_channels(params
) * sample_size
* 2;
207 bitcnt
= (i2sclock
/ (2 * srate
)) - 1;
208 if (bitcnt
< 0 || bitcnt
> TEGRA30_I2S_TIMING_CHANNEL_BIT_COUNT_MASK_US
)
211 ret
= clk_set_rate(i2s
->clk_i2s
, i2sclock
);
213 dev_err(dev
, "Can't set I2S clock rate: %d\n", ret
);
217 val
= bitcnt
<< TEGRA30_I2S_TIMING_CHANNEL_BIT_COUNT_SHIFT
;
219 if (i2sclock
% (2 * srate
))
220 val
|= TEGRA30_I2S_TIMING_NON_SYM_ENABLE
;
222 tegra30_i2s_write(i2s
, TEGRA30_I2S_TIMING
, val
);
224 val
= (0 << TEGRA30_AUDIOCIF_CTRL_FIFO_THRESHOLD_SHIFT
) |
225 (1 << TEGRA30_AUDIOCIF_CTRL_AUDIO_CHANNELS_SHIFT
) |
226 (1 << TEGRA30_AUDIOCIF_CTRL_CLIENT_CHANNELS_SHIFT
) |
227 TEGRA30_AUDIOCIF_CTRL_AUDIO_BITS_16
|
228 TEGRA30_AUDIOCIF_CTRL_CLIENT_BITS_16
;
230 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
231 val
|= TEGRA30_AUDIOCIF_CTRL_DIRECTION_RX
;
232 tegra30_i2s_write(i2s
, TEGRA30_I2S_CIF_RX_CTRL
, val
);
234 val
|= TEGRA30_AUDIOCIF_CTRL_DIRECTION_TX
;
235 tegra30_i2s_write(i2s
, TEGRA30_I2S_CIF_TX_CTRL
, val
);
238 val
= (1 << TEGRA30_I2S_OFFSET_RX_DATA_OFFSET_SHIFT
) |
239 (1 << TEGRA30_I2S_OFFSET_TX_DATA_OFFSET_SHIFT
);
240 tegra30_i2s_write(i2s
, TEGRA30_I2S_OFFSET
, val
);
245 static void tegra30_i2s_start_playback(struct tegra30_i2s
*i2s
)
247 tegra30_ahub_enable_tx_fifo(i2s
->playback_fifo_cif
);
248 i2s
->reg_ctrl
|= TEGRA30_I2S_CTRL_XFER_EN_TX
;
249 tegra30_i2s_write(i2s
, TEGRA30_I2S_CTRL
, i2s
->reg_ctrl
);
252 static void tegra30_i2s_stop_playback(struct tegra30_i2s
*i2s
)
254 tegra30_ahub_disable_tx_fifo(i2s
->playback_fifo_cif
);
255 i2s
->reg_ctrl
&= ~TEGRA30_I2S_CTRL_XFER_EN_TX
;
256 tegra30_i2s_write(i2s
, TEGRA30_I2S_CTRL
, i2s
->reg_ctrl
);
259 static void tegra30_i2s_start_capture(struct tegra30_i2s
*i2s
)
261 tegra30_ahub_enable_rx_fifo(i2s
->capture_fifo_cif
);
262 i2s
->reg_ctrl
|= TEGRA30_I2S_CTRL_XFER_EN_RX
;
263 tegra30_i2s_write(i2s
, TEGRA30_I2S_CTRL
, i2s
->reg_ctrl
);
266 static void tegra30_i2s_stop_capture(struct tegra30_i2s
*i2s
)
268 tegra30_ahub_disable_rx_fifo(i2s
->capture_fifo_cif
);
269 i2s
->reg_ctrl
&= ~TEGRA30_I2S_CTRL_XFER_EN_RX
;
270 tegra30_i2s_write(i2s
, TEGRA30_I2S_CTRL
, i2s
->reg_ctrl
);
273 static int tegra30_i2s_trigger(struct snd_pcm_substream
*substream
, int cmd
,
274 struct snd_soc_dai
*dai
)
276 struct tegra30_i2s
*i2s
= snd_soc_dai_get_drvdata(dai
);
279 case SNDRV_PCM_TRIGGER_START
:
280 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE
:
281 case SNDRV_PCM_TRIGGER_RESUME
:
282 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
283 tegra30_i2s_start_playback(i2s
);
285 tegra30_i2s_start_capture(i2s
);
287 case SNDRV_PCM_TRIGGER_STOP
:
288 case SNDRV_PCM_TRIGGER_PAUSE_PUSH
:
289 case SNDRV_PCM_TRIGGER_SUSPEND
:
290 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
291 tegra30_i2s_stop_playback(i2s
);
293 tegra30_i2s_stop_capture(i2s
);
302 static int tegra30_i2s_probe(struct snd_soc_dai
*dai
)
304 struct tegra30_i2s
*i2s
= snd_soc_dai_get_drvdata(dai
);
306 dai
->capture_dma_data
= &i2s
->capture_dma_data
;
307 dai
->playback_dma_data
= &i2s
->playback_dma_data
;
312 static struct snd_soc_dai_ops tegra30_i2s_dai_ops
= {
313 .startup
= tegra30_i2s_startup
,
314 .shutdown
= tegra30_i2s_shutdown
,
315 .set_fmt
= tegra30_i2s_set_fmt
,
316 .hw_params
= tegra30_i2s_hw_params
,
317 .trigger
= tegra30_i2s_trigger
,
320 static const struct snd_soc_dai_driver tegra30_i2s_dai_template
= {
321 .probe
= tegra30_i2s_probe
,
325 .rates
= SNDRV_PCM_RATE_8000_96000
,
326 .formats
= SNDRV_PCM_FMTBIT_S16_LE
,
331 .rates
= SNDRV_PCM_RATE_8000_96000
,
332 .formats
= SNDRV_PCM_FMTBIT_S16_LE
,
334 .ops
= &tegra30_i2s_dai_ops
,
335 .symmetric_rates
= 1,
338 static bool tegra30_i2s_wr_rd_reg(struct device
*dev
, unsigned int reg
)
341 case TEGRA30_I2S_CTRL
:
342 case TEGRA30_I2S_TIMING
:
343 case TEGRA30_I2S_OFFSET
:
344 case TEGRA30_I2S_CH_CTRL
:
345 case TEGRA30_I2S_SLOT_CTRL
:
346 case TEGRA30_I2S_CIF_RX_CTRL
:
347 case TEGRA30_I2S_CIF_TX_CTRL
:
348 case TEGRA30_I2S_FLOWCTL
:
349 case TEGRA30_I2S_TX_STEP
:
350 case TEGRA30_I2S_FLOW_STATUS
:
351 case TEGRA30_I2S_FLOW_TOTAL
:
352 case TEGRA30_I2S_FLOW_OVER
:
353 case TEGRA30_I2S_FLOW_UNDER
:
354 case TEGRA30_I2S_LCOEF_1_4_0
:
355 case TEGRA30_I2S_LCOEF_1_4_1
:
356 case TEGRA30_I2S_LCOEF_1_4_2
:
357 case TEGRA30_I2S_LCOEF_1_4_3
:
358 case TEGRA30_I2S_LCOEF_1_4_4
:
359 case TEGRA30_I2S_LCOEF_1_4_5
:
360 case TEGRA30_I2S_LCOEF_2_4_0
:
361 case TEGRA30_I2S_LCOEF_2_4_1
:
362 case TEGRA30_I2S_LCOEF_2_4_2
:
369 static bool tegra30_i2s_volatile_reg(struct device
*dev
, unsigned int reg
)
372 case TEGRA30_I2S_FLOW_STATUS
:
373 case TEGRA30_I2S_FLOW_TOTAL
:
374 case TEGRA30_I2S_FLOW_OVER
:
375 case TEGRA30_I2S_FLOW_UNDER
:
382 static const struct regmap_config tegra30_i2s_regmap_config
= {
386 .max_register
= TEGRA30_I2S_LCOEF_2_4_2
,
387 .writeable_reg
= tegra30_i2s_wr_rd_reg
,
388 .readable_reg
= tegra30_i2s_wr_rd_reg
,
389 .volatile_reg
= tegra30_i2s_volatile_reg
,
390 .cache_type
= REGCACHE_RBTREE
,
393 static __devinit
int tegra30_i2s_platform_probe(struct platform_device
*pdev
)
395 struct tegra30_i2s
*i2s
;
397 struct resource
*mem
, *memregion
;
401 i2s
= devm_kzalloc(&pdev
->dev
, sizeof(struct tegra30_i2s
), GFP_KERNEL
);
403 dev_err(&pdev
->dev
, "Can't allocate tegra30_i2s\n");
407 dev_set_drvdata(&pdev
->dev
, i2s
);
409 i2s
->dai
= tegra30_i2s_dai_template
;
410 i2s
->dai
.name
= dev_name(&pdev
->dev
);
412 ret
= of_property_read_u32_array(pdev
->dev
.of_node
,
413 "nvidia,ahub-cif-ids", cif_ids
,
414 ARRAY_SIZE(cif_ids
));
418 i2s
->playback_i2s_cif
= cif_ids
[0];
419 i2s
->capture_i2s_cif
= cif_ids
[1];
421 i2s
->clk_i2s
= clk_get(&pdev
->dev
, NULL
);
422 if (IS_ERR(i2s
->clk_i2s
)) {
423 dev_err(&pdev
->dev
, "Can't retrieve i2s clock\n");
424 ret
= PTR_ERR(i2s
->clk_i2s
);
428 mem
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
430 dev_err(&pdev
->dev
, "No memory resource\n");
435 memregion
= devm_request_mem_region(&pdev
->dev
, mem
->start
,
436 resource_size(mem
), DRV_NAME
);
438 dev_err(&pdev
->dev
, "Memory region already claimed\n");
443 regs
= devm_ioremap(&pdev
->dev
, mem
->start
, resource_size(mem
));
445 dev_err(&pdev
->dev
, "ioremap failed\n");
450 i2s
->regmap
= devm_regmap_init_mmio(&pdev
->dev
, regs
,
451 &tegra30_i2s_regmap_config
);
452 if (IS_ERR(i2s
->regmap
)) {
453 dev_err(&pdev
->dev
, "regmap init failed\n");
454 ret
= PTR_ERR(i2s
->regmap
);
457 regcache_cache_only(i2s
->regmap
, true);
459 pm_runtime_enable(&pdev
->dev
);
460 if (!pm_runtime_enabled(&pdev
->dev
)) {
461 ret
= tegra30_i2s_runtime_resume(&pdev
->dev
);
466 ret
= snd_soc_register_dai(&pdev
->dev
, &i2s
->dai
);
468 dev_err(&pdev
->dev
, "Could not register DAI: %d\n", ret
);
473 ret
= tegra_pcm_platform_register(&pdev
->dev
);
475 dev_err(&pdev
->dev
, "Could not register PCM: %d\n", ret
);
476 goto err_unregister_dai
;
482 snd_soc_unregister_dai(&pdev
->dev
);
484 if (!pm_runtime_status_suspended(&pdev
->dev
))
485 tegra30_i2s_runtime_suspend(&pdev
->dev
);
487 pm_runtime_disable(&pdev
->dev
);
489 clk_put(i2s
->clk_i2s
);
494 static int __devexit
tegra30_i2s_platform_remove(struct platform_device
*pdev
)
496 struct tegra30_i2s
*i2s
= dev_get_drvdata(&pdev
->dev
);
498 pm_runtime_disable(&pdev
->dev
);
499 if (!pm_runtime_status_suspended(&pdev
->dev
))
500 tegra30_i2s_runtime_suspend(&pdev
->dev
);
502 tegra_pcm_platform_unregister(&pdev
->dev
);
503 snd_soc_unregister_dai(&pdev
->dev
);
505 clk_put(i2s
->clk_i2s
);
510 static const struct of_device_id tegra30_i2s_of_match
[] __devinitconst
= {
511 { .compatible
= "nvidia,tegra30-i2s", },
515 static const struct dev_pm_ops tegra30_i2s_pm_ops __devinitconst
= {
516 SET_RUNTIME_PM_OPS(tegra30_i2s_runtime_suspend
,
517 tegra30_i2s_runtime_resume
, NULL
)
520 static struct platform_driver tegra30_i2s_driver
= {
523 .owner
= THIS_MODULE
,
524 .of_match_table
= tegra30_i2s_of_match
,
525 .pm
= &tegra30_i2s_pm_ops
,
527 .probe
= tegra30_i2s_platform_probe
,
528 .remove
= __devexit_p(tegra30_i2s_platform_remove
),
530 module_platform_driver(tegra30_i2s_driver
);
532 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
533 MODULE_DESCRIPTION("Tegra30 I2S ASoC driver");
534 MODULE_LICENSE("GPL");
535 MODULE_ALIAS("platform:" DRV_NAME
);
536 MODULE_DEVICE_TABLE(of
, tegra30_i2s_of_match
);