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.h"
47 struct bf5xx_i2s_port {
55 static struct bf5xx_i2s_port bf5xx_i2s;
56 static int sport_num = CONFIG_SND_BF5XX_SPORT_NUM;
58 static struct sport_param sport_params[2] = {
60 .dma_rx_chan = CH_SPORT0_RX,
61 .dma_tx_chan = CH_SPORT0_TX,
62 .err_irq = IRQ_SPORT0_ERROR,
63 .regs = (struct sport_register *)SPORT0_TCR1,
66 .dma_rx_chan = CH_SPORT1_RX,
67 .dma_tx_chan = CH_SPORT1_TX,
68 .err_irq = IRQ_SPORT1_ERROR,
69 .regs = (struct sport_register *)SPORT1_TCR1,
73 static int bf5xx_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
78 /* interface format:support I2S,slave mode */
79 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
80 case SND_SOC_DAIFMT_I2S:
82 case SND_SOC_DAIFMT_LEFT_J:
90 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
91 case SND_SOC_DAIFMT_CBS_CFS:
94 case SND_SOC_DAIFMT_CBM_CFS:
97 case SND_SOC_DAIFMT_CBM_CFM:
99 case SND_SOC_DAIFMT_CBS_CFM:
110 static int bf5xx_i2s_startup(struct snd_pcm_substream *substream)
112 pr_debug("%s enter\n", __func__);
114 /*this counter is used for counting how many pcm streams are opened*/
119 static int bf5xx_i2s_hw_params(struct snd_pcm_substream *substream,
120 struct snd_pcm_hw_params *params)
124 bf5xx_i2s.tcr2 &= ~0x1f;
125 bf5xx_i2s.rcr2 &= ~0x1f;
126 switch (params_format(params)) {
127 case SNDRV_PCM_FORMAT_S16_LE:
128 bf5xx_i2s.tcr2 |= 15;
129 bf5xx_i2s.rcr2 |= 15;
131 case SNDRV_PCM_FORMAT_S24_LE:
132 bf5xx_i2s.tcr2 |= 23;
133 bf5xx_i2s.rcr2 |= 23;
135 case SNDRV_PCM_FORMAT_S32_LE:
136 bf5xx_i2s.tcr2 |= 31;
137 bf5xx_i2s.rcr2 |= 31;
141 if (bf5xx_i2s.counter == 1) {
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 format:I2S, slave mode.
150 ret = sport_config_rx(sport_handle, RFSR | RCKFE,
151 RSFSE|bf5xx_i2s.rcr2, 0, 0);
153 pr_err("SPORT is busy!\n");
157 ret = sport_config_tx(sport_handle, TFSR | TCKFE,
158 TSFSE|bf5xx_i2s.tcr2, 0, 0);
160 pr_err("SPORT is busy!\n");
168 static void bf5xx_i2s_shutdown(struct snd_pcm_substream *substream)
170 pr_debug("%s enter\n", __func__);
174 static int bf5xx_i2s_probe(struct platform_device *pdev,
175 struct snd_soc_dai *dai)
177 u16 sport_req[][7] = {
178 { P_SPORT0_DTPRI, P_SPORT0_TSCLK, P_SPORT0_RFS,
179 P_SPORT0_DRPRI, P_SPORT0_RSCLK, 0},
180 { P_SPORT1_DTPRI, P_SPORT1_TSCLK, P_SPORT1_RFS,
181 P_SPORT1_DRPRI, P_SPORT1_RSCLK, 0},
184 pr_debug("%s enter\n", __func__);
185 if (peripheral_request_list(&sport_req[sport_num][0], "soc-audio")) {
186 pr_err("Requesting Peripherals failed\n");
190 /* request DMA for SPORT */
191 sport_handle = sport_init(&sport_params[sport_num], 4, \
192 2 * sizeof(u32), NULL);
194 peripheral_free_list(&sport_req[sport_num][0]);
202 static int bf5xx_i2s_suspend(struct platform_device *dev,
203 struct snd_soc_dai *dai)
205 struct sport_device *sport =
206 (struct sport_device *)dai->private_data;
208 pr_debug("%s : sport %d\n", __func__, dai->id);
211 if (dai->capture.active)
212 sport_rx_stop(sport);
213 if (dai->playback.active)
214 sport_tx_stop(sport);
218 static int bf5xx_i2s_resume(struct platform_device *pdev,
219 struct snd_soc_dai *dai)
222 struct sport_device *sport =
223 (struct sport_device *)dai->private_data;
225 pr_debug("%s : sport %d\n", __func__, dai->id);
229 ret = sport_config_rx(sport_handle, RFSR | RCKFE, RSFSE|0x1f, 0, 0);
231 pr_err("SPORT is busy!\n");
235 ret = sport_config_tx(sport_handle, TFSR | TCKFE, TSFSE|0x1f, 0, 0);
237 pr_err("SPORT is busy!\n");
241 if (dai->capture.active)
242 sport_rx_start(sport);
243 if (dai->playback.active)
244 sport_tx_start(sport);
249 #define bf5xx_i2s_suspend NULL
250 #define bf5xx_i2s_resume NULL
253 #define BF5XX_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
254 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
255 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \
256 SNDRV_PCM_RATE_96000)
258 #define BF5XX_I2S_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |\
259 SNDRV_PCM_FMTBIT_S32_LE)
261 struct snd_soc_dai bf5xx_i2s_dai = {
264 .type = SND_SOC_DAI_I2S,
265 .probe = bf5xx_i2s_probe,
266 .suspend = bf5xx_i2s_suspend,
267 .resume = bf5xx_i2s_resume,
271 .rates = BF5XX_I2S_RATES,
272 .formats = BF5XX_I2S_FORMATS,},
276 .rates = BF5XX_I2S_RATES,
277 .formats = BF5XX_I2S_FORMATS,},
279 .startup = bf5xx_i2s_startup,
280 .shutdown = bf5xx_i2s_shutdown,
281 .hw_params = bf5xx_i2s_hw_params,},
283 .set_fmt = bf5xx_i2s_set_dai_fmt,
286 EXPORT_SYMBOL_GPL(bf5xx_i2s_dai);
288 /* Module information */
289 MODULE_AUTHOR("Cliff Cai");
290 MODULE_DESCRIPTION("I2S driver for ADI Blackfin");
291 MODULE_LICENSE("GPL");