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,
74 * Setting the TFS pin selector for SPORT 0 based on whether the selected
75 * port id F or G. If the port is F then no conflict should exist for the
76 * TFS. When Port G is selected and EMAC then there is a conflict between
77 * the PHY interrupt line and TFS. Current settings prevent the conflict
78 * by ignoring the TFS pin when Port G is selected. This allows both
79 * ssm2602 using Port G and EMAC concurrently.
81 #ifdef CONFIG_BF527_SPORT0_PORTF
82 #define LOCAL_SPORT0_TFS (P_SPORT0_TFS)
84 #define LOCAL_SPORT0_TFS (0)
87 static u16 sport_req[][7] = { {P_SPORT0_DTPRI, P_SPORT0_TSCLK, P_SPORT0_RFS,
88 P_SPORT0_DRPRI, P_SPORT0_RSCLK, LOCAL_SPORT0_TFS, 0},
89 {P_SPORT1_DTPRI, P_SPORT1_TSCLK, P_SPORT1_RFS, P_SPORT1_DRPRI,
90 P_SPORT1_RSCLK, P_SPORT1_TFS, 0} };
92 static int bf5xx_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
97 /* interface format:support I2S,slave mode */
98 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
99 case SND_SOC_DAIFMT_I2S:
100 bf5xx_i2s.tcr1 |= TFSR | TCKFE;
101 bf5xx_i2s.rcr1 |= RFSR | RCKFE;
102 bf5xx_i2s.tcr2 |= TSFSE;
103 bf5xx_i2s.rcr2 |= RSFSE;
105 case SND_SOC_DAIFMT_DSP_A:
106 bf5xx_i2s.tcr1 |= TFSR;
107 bf5xx_i2s.rcr1 |= RFSR;
109 case SND_SOC_DAIFMT_LEFT_J:
113 printk(KERN_ERR "%s: Unknown DAI format type\n", __func__);
118 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
119 case SND_SOC_DAIFMT_CBM_CFM:
121 case SND_SOC_DAIFMT_CBS_CFS:
122 case SND_SOC_DAIFMT_CBM_CFS:
123 case SND_SOC_DAIFMT_CBS_CFM:
127 printk(KERN_ERR "%s: Unknown DAI master type\n", __func__);
135 static int bf5xx_i2s_startup(struct snd_pcm_substream *substream,
136 struct snd_soc_dai *dai)
138 pr_debug("%s enter\n", __func__);
140 /*this counter is used for counting how many pcm streams are opened*/
145 static int bf5xx_i2s_hw_params(struct snd_pcm_substream *substream,
146 struct snd_pcm_hw_params *params,
147 struct snd_soc_dai *dai)
151 bf5xx_i2s.tcr2 &= ~0x1f;
152 bf5xx_i2s.rcr2 &= ~0x1f;
153 switch (params_format(params)) {
154 case SNDRV_PCM_FORMAT_S16_LE:
155 bf5xx_i2s.tcr2 |= 15;
156 bf5xx_i2s.rcr2 |= 15;
157 sport_handle->wdsize = 2;
159 case SNDRV_PCM_FORMAT_S24_LE:
160 bf5xx_i2s.tcr2 |= 23;
161 bf5xx_i2s.rcr2 |= 23;
162 sport_handle->wdsize = 3;
164 case SNDRV_PCM_FORMAT_S32_LE:
165 bf5xx_i2s.tcr2 |= 31;
166 bf5xx_i2s.rcr2 |= 31;
167 sport_handle->wdsize = 4;
171 if (bf5xx_i2s.counter == 1) {
173 * TX and RX are not independent,they are enabled at the
174 * same time, even if only one side is running. So, we
175 * need to configure both of them at the time when the first
178 * CPU DAI:slave mode.
180 ret = sport_config_rx(sport_handle, bf5xx_i2s.rcr1,
181 bf5xx_i2s.rcr2, 0, 0);
183 pr_err("SPORT is busy!\n");
187 ret = sport_config_tx(sport_handle, bf5xx_i2s.tcr1,
188 bf5xx_i2s.tcr2, 0, 0);
190 pr_err("SPORT is busy!\n");
198 static void bf5xx_i2s_shutdown(struct snd_pcm_substream *substream,
199 struct snd_soc_dai *dai)
201 pr_debug("%s enter\n", __func__);
205 static int bf5xx_i2s_probe(struct platform_device *pdev,
206 struct snd_soc_dai *dai)
208 pr_debug("%s enter\n", __func__);
209 if (peripheral_request_list(&sport_req[sport_num][0], "soc-audio")) {
210 pr_err("Requesting Peripherals failed\n");
214 /* request DMA for SPORT */
215 sport_handle = sport_init(&sport_params[sport_num], 4, \
216 2 * sizeof(u32), NULL);
218 peripheral_free_list(&sport_req[sport_num][0]);
225 static void bf5xx_i2s_remove(struct platform_device *pdev,
226 struct snd_soc_dai *dai)
228 pr_debug("%s enter\n", __func__);
229 peripheral_free_list(&sport_req[sport_num][0]);
233 static int bf5xx_i2s_suspend(struct platform_device *dev,
234 struct snd_soc_dai *dai)
236 struct sport_device *sport =
237 (struct sport_device *)dai->private_data;
239 pr_debug("%s : sport %d\n", __func__, dai->id);
242 if (dai->capture.active)
243 sport_rx_stop(sport);
244 if (dai->playback.active)
245 sport_tx_stop(sport);
249 static int bf5xx_i2s_resume(struct platform_device *pdev,
250 struct snd_soc_dai *dai)
253 struct sport_device *sport =
254 (struct sport_device *)dai->private_data;
256 pr_debug("%s : sport %d\n", __func__, dai->id);
260 ret = sport_config_rx(sport_handle, RFSR | RCKFE, RSFSE|0x1f, 0, 0);
262 pr_err("SPORT is busy!\n");
266 ret = sport_config_tx(sport_handle, TFSR | TCKFE, TSFSE|0x1f, 0, 0);
268 pr_err("SPORT is busy!\n");
272 if (dai->capture.active)
273 sport_rx_start(sport);
274 if (dai->playback.active)
275 sport_tx_start(sport);
280 #define bf5xx_i2s_suspend NULL
281 #define bf5xx_i2s_resume NULL
284 #define BF5XX_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
285 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
286 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \
287 SNDRV_PCM_RATE_96000)
289 #define BF5XX_I2S_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |\
290 SNDRV_PCM_FMTBIT_S32_LE)
292 struct snd_soc_dai bf5xx_i2s_dai = {
295 .probe = bf5xx_i2s_probe,
296 .remove = bf5xx_i2s_remove,
297 .suspend = bf5xx_i2s_suspend,
298 .resume = bf5xx_i2s_resume,
302 .rates = BF5XX_I2S_RATES,
303 .formats = BF5XX_I2S_FORMATS,},
307 .rates = BF5XX_I2S_RATES,
308 .formats = BF5XX_I2S_FORMATS,},
310 .startup = bf5xx_i2s_startup,
311 .shutdown = bf5xx_i2s_shutdown,
312 .hw_params = bf5xx_i2s_hw_params,
313 .set_fmt = bf5xx_i2s_set_dai_fmt,
316 EXPORT_SYMBOL_GPL(bf5xx_i2s_dai);
318 /* Module information */
319 MODULE_AUTHOR("Cliff Cai");
320 MODULE_DESCRIPTION("I2S driver for ADI Blackfin");
321 MODULE_LICENSE("GPL");