Merge commit 'linux-pnfs/nfs41-for-2.6.31' into nfsv41-for-2.6.31
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / sound / soc / blackfin / bf5xx-i2s.c
blob964824419678bfe361b77bab3ce538eb7af6bc38
1 /*
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
8 * Modified:
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>
39 #include <asm/irq.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 {
48 u16 tcr1;
49 u16 rcr1;
50 u16 tcr2;
51 u16 rcr2;
52 int counter;
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)
83 #else
84 #define LOCAL_SPORT0_TFS (0)
85 #endif
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,
93 unsigned int fmt)
95 int ret = 0;
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;
104 break;
105 case SND_SOC_DAIFMT_DSP_A:
106 bf5xx_i2s.tcr1 |= TFSR;
107 bf5xx_i2s.rcr1 |= RFSR;
108 break;
109 case SND_SOC_DAIFMT_LEFT_J:
110 ret = -EINVAL;
111 break;
112 default:
113 printk(KERN_ERR "%s: Unknown DAI format type\n", __func__);
114 ret = -EINVAL;
115 break;
118 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
119 case SND_SOC_DAIFMT_CBM_CFM:
120 break;
121 case SND_SOC_DAIFMT_CBS_CFS:
122 case SND_SOC_DAIFMT_CBM_CFS:
123 case SND_SOC_DAIFMT_CBS_CFM:
124 ret = -EINVAL;
125 break;
126 default:
127 printk(KERN_ERR "%s: Unknown DAI master type\n", __func__);
128 ret = -EINVAL;
129 break;
132 return ret;
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*/
141 bf5xx_i2s.counter++;
142 return 0;
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)
149 int ret = 0;
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;
158 break;
159 case SNDRV_PCM_FORMAT_S24_LE:
160 bf5xx_i2s.tcr2 |= 23;
161 bf5xx_i2s.rcr2 |= 23;
162 sport_handle->wdsize = 3;
163 break;
164 case SNDRV_PCM_FORMAT_S32_LE:
165 bf5xx_i2s.tcr2 |= 31;
166 bf5xx_i2s.rcr2 |= 31;
167 sport_handle->wdsize = 4;
168 break;
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
176 * stream is opened.
178 * CPU DAI:slave mode.
180 ret = sport_config_rx(sport_handle, bf5xx_i2s.rcr1,
181 bf5xx_i2s.rcr2, 0, 0);
182 if (ret) {
183 pr_err("SPORT is busy!\n");
184 return -EBUSY;
187 ret = sport_config_tx(sport_handle, bf5xx_i2s.tcr1,
188 bf5xx_i2s.tcr2, 0, 0);
189 if (ret) {
190 pr_err("SPORT is busy!\n");
191 return -EBUSY;
195 return 0;
198 static void bf5xx_i2s_shutdown(struct snd_pcm_substream *substream,
199 struct snd_soc_dai *dai)
201 pr_debug("%s enter\n", __func__);
202 bf5xx_i2s.counter--;
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");
211 return -EFAULT;
214 /* request DMA for SPORT */
215 sport_handle = sport_init(&sport_params[sport_num], 4, \
216 2 * sizeof(u32), NULL);
217 if (!sport_handle) {
218 peripheral_free_list(&sport_req[sport_num][0]);
219 return -ENODEV;
222 return 0;
225 static void bf5xx_i2s_remove(struct snd_soc_dai *dai)
227 pr_debug("%s enter\n", __func__);
228 peripheral_free_list(&sport_req[sport_num][0]);
231 #ifdef CONFIG_PM
232 static int bf5xx_i2s_suspend(struct snd_soc_dai *dai)
234 struct sport_device *sport =
235 (struct sport_device *)dai->private_data;
237 pr_debug("%s : sport %d\n", __func__, dai->id);
238 if (!dai->active)
239 return 0;
240 if (dai->capture.active)
241 sport_rx_stop(sport);
242 if (dai->playback.active)
243 sport_tx_stop(sport);
244 return 0;
247 static int bf5xx_i2s_resume(struct platform_device *pdev,
248 struct snd_soc_dai *dai)
250 int ret;
251 struct sport_device *sport =
252 (struct sport_device *)dai->private_data;
254 pr_debug("%s : sport %d\n", __func__, dai->id);
255 if (!dai->active)
256 return 0;
258 ret = sport_config_rx(sport_handle, RFSR | RCKFE, RSFSE|0x1f, 0, 0);
259 if (ret) {
260 pr_err("SPORT is busy!\n");
261 return -EBUSY;
264 ret = sport_config_tx(sport_handle, TFSR | TCKFE, TSFSE|0x1f, 0, 0);
265 if (ret) {
266 pr_err("SPORT is busy!\n");
267 return -EBUSY;
270 if (dai->capture.active)
271 sport_rx_start(sport);
272 if (dai->playback.active)
273 sport_tx_start(sport);
274 return 0;
277 #else
278 #define bf5xx_i2s_suspend NULL
279 #define bf5xx_i2s_resume NULL
280 #endif
282 #define BF5XX_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
283 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
284 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \
285 SNDRV_PCM_RATE_96000)
287 #define BF5XX_I2S_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |\
288 SNDRV_PCM_FMTBIT_S32_LE)
290 static struct snd_soc_dai_ops bf5xx_i2s_dai_ops = {
291 .startup = bf5xx_i2s_startup,
292 .shutdown = bf5xx_i2s_shutdown,
293 .hw_params = bf5xx_i2s_hw_params,
294 .set_fmt = bf5xx_i2s_set_dai_fmt,
297 struct snd_soc_dai bf5xx_i2s_dai = {
298 .name = "bf5xx-i2s",
299 .id = 0,
300 .probe = bf5xx_i2s_probe,
301 .remove = bf5xx_i2s_remove,
302 .suspend = bf5xx_i2s_suspend,
303 .resume = bf5xx_i2s_resume,
304 .playback = {
305 .channels_min = 1,
306 .channels_max = 2,
307 .rates = BF5XX_I2S_RATES,
308 .formats = BF5XX_I2S_FORMATS,},
309 .capture = {
310 .channels_min = 1,
311 .channels_max = 2,
312 .rates = BF5XX_I2S_RATES,
313 .formats = BF5XX_I2S_FORMATS,},
314 .ops = &bf5xx_i2s_dai_ops,
316 EXPORT_SYMBOL_GPL(bf5xx_i2s_dai);
318 static int __init bfin_i2s_init(void)
320 return snd_soc_register_dai(&bf5xx_i2s_dai);
322 module_init(bfin_i2s_init);
324 static void __exit bfin_i2s_exit(void)
326 snd_soc_unregister_dai(&bf5xx_i2s_dai);
328 module_exit(bfin_i2s_exit);
330 /* Module information */
331 MODULE_AUTHOR("Cliff Cai");
332 MODULE_DESCRIPTION("I2S driver for ADI Blackfin");
333 MODULE_LICENSE("GPL");