2 * File: sound/soc/blackfin/bf5xx-i2s.c
3 * Author: Cliff Cai <Cliff.Cai@analog.com>
5 * Created: Tue June 06 2008
6 * Description: Blackfin I2S CPU DAI driver
9 * Copyright 2008 Analog Devices Inc.
11 * Bugs: Enter bugs at http://blackfin.uclinux.org/
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, see the file COPYING, or write
25 * to the Free Software Foundation, Inc.,
26 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
29 #include <linux/init.h>
30 #include <linux/module.h>
31 #include <linux/device.h>
32 #include <linux/delay.h>
33 #include <sound/core.h>
34 #include <sound/pcm.h>
35 #include <sound/pcm_params.h>
36 #include <sound/initval.h>
37 #include <sound/soc.h>
40 #include <asm/portmux.h>
41 #include <linux/mutex.h>
42 #include <linux/gpio.h>
44 #include "bf5xx-sport.h"
45 #include "bf5xx-i2s-pcm.h"
47 struct bf5xx_i2s_port {
58 struct bf5xx_i2s_pcm_data tx_dma_data;
59 struct bf5xx_i2s_pcm_data rx_dma_data;
62 static int bf5xx_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
65 struct sport_device *sport_handle = snd_soc_dai_get_drvdata(cpu_dai);
66 struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
69 /* interface format:support I2S,slave mode */
70 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
71 case SND_SOC_DAIFMT_I2S:
72 bf5xx_i2s->tcr1 |= TFSR | TCKFE;
73 bf5xx_i2s->rcr1 |= RFSR | RCKFE;
74 bf5xx_i2s->tcr2 |= TSFSE;
75 bf5xx_i2s->rcr2 |= RSFSE;
77 case SND_SOC_DAIFMT_DSP_A:
78 bf5xx_i2s->tcr1 |= TFSR;
79 bf5xx_i2s->rcr1 |= RFSR;
81 case SND_SOC_DAIFMT_LEFT_J:
85 dev_err(cpu_dai->dev, "%s: Unknown DAI format type\n",
91 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
92 case SND_SOC_DAIFMT_CBM_CFM:
94 case SND_SOC_DAIFMT_CBS_CFS:
95 case SND_SOC_DAIFMT_CBM_CFS:
96 case SND_SOC_DAIFMT_CBS_CFM:
100 dev_err(cpu_dai->dev, "%s: Unknown DAI master type\n",
109 static int bf5xx_i2s_hw_params(struct snd_pcm_substream *substream,
110 struct snd_pcm_hw_params *params,
111 struct snd_soc_dai *dai)
113 struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
114 struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
117 bf5xx_i2s->tcr2 &= ~0x1f;
118 bf5xx_i2s->rcr2 &= ~0x1f;
119 switch (params_format(params)) {
120 case SNDRV_PCM_FORMAT_S8:
121 bf5xx_i2s->tcr2 |= 7;
122 bf5xx_i2s->rcr2 |= 7;
123 sport_handle->wdsize = 1;
124 case SNDRV_PCM_FORMAT_S16_LE:
125 bf5xx_i2s->tcr2 |= 15;
126 bf5xx_i2s->rcr2 |= 15;
127 sport_handle->wdsize = 2;
129 case SNDRV_PCM_FORMAT_S24_LE:
130 bf5xx_i2s->tcr2 |= 23;
131 bf5xx_i2s->rcr2 |= 23;
132 sport_handle->wdsize = 3;
134 case SNDRV_PCM_FORMAT_S32_LE:
135 bf5xx_i2s->tcr2 |= 31;
136 bf5xx_i2s->rcr2 |= 31;
137 sport_handle->wdsize = 4;
141 if (!bf5xx_i2s->configured) {
143 * TX and RX are not independent,they are enabled at the
144 * same time, even if only one side is running. So, we
145 * need to configure both of them at the time when the first
148 * CPU DAI:slave mode.
150 bf5xx_i2s->configured = 1;
151 ret = sport_config_rx(sport_handle, bf5xx_i2s->rcr1,
152 bf5xx_i2s->rcr2, 0, 0);
154 dev_err(dai->dev, "SPORT is busy!\n");
158 ret = sport_config_tx(sport_handle, bf5xx_i2s->tcr1,
159 bf5xx_i2s->tcr2, 0, 0);
161 dev_err(dai->dev, "SPORT is busy!\n");
169 static void bf5xx_i2s_shutdown(struct snd_pcm_substream *substream,
170 struct snd_soc_dai *dai)
172 struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
173 struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
175 dev_dbg(dai->dev, "%s enter\n", __func__);
176 /* No active stream, SPORT is allowed to be configured again. */
178 bf5xx_i2s->configured = 0;
181 static int bf5xx_i2s_set_channel_map(struct snd_soc_dai *dai,
182 unsigned int tx_num, unsigned int *tx_slot,
183 unsigned int rx_num, unsigned int *rx_slot)
185 struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
186 struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
187 unsigned int tx_mapped = 0, rx_mapped = 0;
191 if ((tx_num > BFIN_TDM_DAI_MAX_SLOTS) ||
192 (rx_num > BFIN_TDM_DAI_MAX_SLOTS))
195 for (i = 0; i < tx_num; i++) {
197 if ((slot < BFIN_TDM_DAI_MAX_SLOTS) &&
198 (!(tx_mapped & (1 << slot)))) {
199 bf5xx_i2s->tx_dma_data.map[i] = slot;
200 tx_mapped |= 1 << slot;
204 for (i = 0; i < rx_num; i++) {
206 if ((slot < BFIN_TDM_DAI_MAX_SLOTS) &&
207 (!(rx_mapped & (1 << slot)))) {
208 bf5xx_i2s->rx_dma_data.map[i] = slot;
209 rx_mapped |= 1 << slot;
217 static int bf5xx_i2s_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
218 unsigned int rx_mask, int slots, int width)
220 struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
221 struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
223 if (slots % 8 != 0 || slots > 8)
229 bf5xx_i2s->slots = slots;
230 bf5xx_i2s->tx_mask = tx_mask;
231 bf5xx_i2s->rx_mask = rx_mask;
233 bf5xx_i2s->tx_dma_data.tdm_mode = slots != 0;
234 bf5xx_i2s->rx_dma_data.tdm_mode = slots != 0;
236 return sport_set_multichannel(sport_handle, slots, tx_mask, rx_mask, 0);
240 static int bf5xx_i2s_suspend(struct snd_soc_dai *dai)
242 struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
244 dev_dbg(dai->dev, "%s : sport %d\n", __func__, dai->id);
246 if (dai->capture_active)
247 sport_rx_stop(sport_handle);
248 if (dai->playback_active)
249 sport_tx_stop(sport_handle);
253 static int bf5xx_i2s_resume(struct snd_soc_dai *dai)
255 struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
256 struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
259 dev_dbg(dai->dev, "%s : sport %d\n", __func__, dai->id);
261 ret = sport_config_rx(sport_handle, bf5xx_i2s->rcr1,
262 bf5xx_i2s->rcr2, 0, 0);
264 dev_err(dai->dev, "SPORT is busy!\n");
268 ret = sport_config_tx(sport_handle, bf5xx_i2s->tcr1,
269 bf5xx_i2s->tcr2, 0, 0);
271 dev_err(dai->dev, "SPORT is busy!\n");
275 return sport_set_multichannel(sport_handle, bf5xx_i2s->slots,
276 bf5xx_i2s->tx_mask, bf5xx_i2s->rx_mask, 0);
280 #define bf5xx_i2s_suspend NULL
281 #define bf5xx_i2s_resume NULL
284 static int bf5xx_i2s_dai_probe(struct snd_soc_dai *dai)
286 struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
287 struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
290 for (i = 0; i < BFIN_TDM_DAI_MAX_SLOTS; i++) {
291 bf5xx_i2s->tx_dma_data.map[i] = i;
292 bf5xx_i2s->rx_dma_data.map[i] = i;
295 dai->playback_dma_data = &bf5xx_i2s->tx_dma_data;
296 dai->capture_dma_data = &bf5xx_i2s->rx_dma_data;
301 #define BF5XX_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
302 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
303 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \
304 SNDRV_PCM_RATE_96000)
306 #define BF5XX_I2S_FORMATS \
307 (SNDRV_PCM_FMTBIT_S8 | \
308 SNDRV_PCM_FMTBIT_S16_LE | \
309 SNDRV_PCM_FMTBIT_S24_LE | \
310 SNDRV_PCM_FMTBIT_S32_LE)
312 static const struct snd_soc_dai_ops bf5xx_i2s_dai_ops = {
313 .shutdown = bf5xx_i2s_shutdown,
314 .hw_params = bf5xx_i2s_hw_params,
315 .set_fmt = bf5xx_i2s_set_dai_fmt,
316 .set_tdm_slot = bf5xx_i2s_set_tdm_slot,
317 .set_channel_map = bf5xx_i2s_set_channel_map,
320 static struct snd_soc_dai_driver bf5xx_i2s_dai = {
321 .probe = bf5xx_i2s_dai_probe,
322 .suspend = bf5xx_i2s_suspend,
323 .resume = bf5xx_i2s_resume,
327 .rates = BF5XX_I2S_RATES,
328 .formats = BF5XX_I2S_FORMATS,},
332 .rates = BF5XX_I2S_RATES,
333 .formats = BF5XX_I2S_FORMATS,},
334 .ops = &bf5xx_i2s_dai_ops,
337 static const struct snd_soc_component_driver bf5xx_i2s_component = {
341 static int bf5xx_i2s_probe(struct platform_device *pdev)
343 struct sport_device *sport_handle;
346 /* configure SPORT for I2S */
347 sport_handle = sport_init(pdev, 4, 8 * sizeof(u32),
348 sizeof(struct bf5xx_i2s_port));
352 /* register with the ASoC layers */
353 ret = snd_soc_register_component(&pdev->dev, &bf5xx_i2s_component,
356 dev_err(&pdev->dev, "Failed to register DAI: %d\n", ret);
357 sport_done(sport_handle);
364 static int bf5xx_i2s_remove(struct platform_device *pdev)
366 struct sport_device *sport_handle = platform_get_drvdata(pdev);
368 dev_dbg(&pdev->dev, "%s enter\n", __func__);
370 snd_soc_unregister_component(&pdev->dev);
371 sport_done(sport_handle);
376 static struct platform_driver bfin_i2s_driver = {
377 .probe = bf5xx_i2s_probe,
378 .remove = bf5xx_i2s_remove,
381 .owner = THIS_MODULE,
385 module_platform_driver(bfin_i2s_driver);
387 /* Module information */
388 MODULE_AUTHOR("Cliff Cai");
389 MODULE_DESCRIPTION("I2S driver for ADI Blackfin");
390 MODULE_LICENSE("GPL");