summaryrefslogtreecommitdiffstats
path: root/sound/soc/blackfin/bf5xx-tdm.c
blob: 125123929f16c28d1e52ca01ebde662196f66253 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
/*
 * File:         sound/soc/blackfin/bf5xx-tdm.c
 * Author:       Barry Song <Barry.Song@analog.com>
 *
 * Created:      Thurs June 04 2009
 * Description:  Blackfin I2S(TDM) CPU DAI driver
 *              Even though TDM mode can be as part of I2S DAI, but there
 *              are so much difference in configuration and data flow,
 *              it's very ugly to integrate I2S and TDM into a module
 *
 * Modified:
 *               Copyright 2009 Analog Devices Inc.
 *
 * Bugs:         Enter bugs at http://blackfin.uclinux.org/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see the file COPYING, or write
 * to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/soc.h>

#include <asm/irq.h>
#include <asm/portmux.h>
#include <linux/mutex.h>
#include <linux/gpio.h>

#include "bf5xx-sport.h"
#include "bf5xx-tdm.h"

static struct bf5xx_tdm_port bf5xx_tdm;
static int sport_num = CONFIG_SND_BF5XX_SPORT_NUM;

static struct sport_param sport_params[2] = {
	{
		.dma_rx_chan    = CH_SPORT0_RX,
		.dma_tx_chan    = CH_SPORT0_TX,
		.err_irq        = IRQ_SPORT0_ERROR,
		.regs           = (struct sport_register *)SPORT0_TCR1,
	},
	{
		.dma_rx_chan    = CH_SPORT1_RX,
		.dma_tx_chan    = CH_SPORT1_TX,
		.err_irq        = IRQ_SPORT1_ERROR,
		.regs           = (struct sport_register *)SPORT1_TCR1,
	}
};

/*
 * Setting the TFS pin selector for SPORT 0 based on whether the selected
 * port id F or G. If the port is F then no conflict should exist for the
 * TFS. When Port G is selected and EMAC then there is a conflict between
 * the PHY interrupt line and TFS.  Current settings prevent the conflict
 * by ignoring the TFS pin when Port G is selected. This allows both
 * codecs and EMAC using Port G concurrently.
 */
#ifdef CONFIG_BF527_SPORT0_PORTG
#define LOCAL_SPORT0_TFS (0)
#else
#define LOCAL_SPORT0_TFS (P_SPORT0_TFS)
#endif

static u16 sport_req[][7] = { {P_SPORT0_DTPRI, P_SPORT0_TSCLK, P_SPORT0_RFS,
	P_SPORT0_DRPRI, P_SPORT0_RSCLK, LOCAL_SPORT0_TFS, 0},
	   {P_SPORT1_DTPRI, P_SPORT1_TSCLK, P_SPORT1_RFS, P_SPORT1_DRPRI,
		   P_SPORT1_RSCLK, P_SPORT1_TFS, 0} };

static int bf5xx_tdm_set_dai_fmt(struct snd_soc_dai *cpu_dai,
	unsigned int fmt)
{
	int ret = 0;

	/* interface format:support TDM,slave mode */
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_DSP_A:
		break;
	default:
		printk(KERN_ERR "%s: Unknown DAI format type\n", __func__);
		ret = -EINVAL;
		break;
	}

	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBM_CFM:
		break;
	case SND_SOC_DAIFMT_CBS_CFS:
	case SND_SOC_DAIFMT_CBM_CFS:
	case SND_SOC_DAIFMT_CBS_CFM:
		ret = -EINVAL;
		break;
	default:
		printk(KERN_ERR "%s: Unknown DAI master type\n", __func__);
		ret = -EINVAL;
		break;
	}

	return ret;
}

static int bf5xx_tdm_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params,
	struct snd_soc_dai *dai)
{
	int ret = 0;

	bf5xx_tdm.tcr2 &= ~0x1f;
	bf5xx_tdm.rcr2 &= ~0x1f;
	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S32_LE:
		bf5xx_tdm.tcr2 |= 31;
		bf5xx_tdm.rcr2 |= 31;
		sport_handle->wdsize = 4;
		break;
		/* at present, we only support 32bit transfer */
	default:
		pr_err("not supported PCM format yet\n");
		return -EINVAL;
		break;
	}

	if (!bf5xx_tdm.configured) {
		/*
		 * TX and RX are not independent,they are enabled at the
		 * same time, even if only one side is running. So, we
		 * need to configure both of them at the time when the first
		 * stream is opened.
		 *
		 * CPU DAI:slave mode.
		 */
		ret = sport_config_rx(sport_handle, bf5xx_tdm.rcr1,
			bf5xx_tdm.rcr2, 0, 0);
		if (ret) {
			pr_err("SPORT is busy!\n");
			return -EBUSY;
		}

		ret = sport_config_tx(sport_handle, bf5xx_tdm.tcr1,
			bf5xx_tdm.tcr2, 0, 0);
		if (ret) {
			pr_err("SPORT is busy!\n");
			return -EBUSY;
		}

		bf5xx_tdm.configured = 1;
	}

	return 0;
}

static void bf5xx_tdm_shutdown(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
{
	/* No active stream, SPORT is allowed to be configured again. */
	if (!dai->active)
		bf5xx_tdm.configured = 0;
}

static int bf5xx_tdm_set_channel_map(struct snd_soc_dai *dai,
		unsigned int tx_num, unsigned int *tx_slot,
		unsigned int rx_num, unsigned int *rx_slot)
{
	int i;
	unsigned int slot;
	unsigned int tx_mapped = 0, rx_mapped = 0;

	if ((tx_num > BFIN_TDM_DAI_MAX_SLOTS) ||
			(rx_num > BFIN_TDM_DAI_MAX_SLOTS))
		return -EINVAL;

	for (i = 0; i < tx_num; i++) {
		slot = tx_slot[i];
		if ((slot < BFIN_TDM_DAI_MAX_SLOTS) &&
				(!(tx_mapped & (1 << slot)))) {
			bf5xx_tdm.tx_map[i] = slot;
			tx_mapped |= 1 << slot;
		} else
			return -EINVAL;
	}
	for (i = 0; i < rx_num; i++) {
		slot = rx_slot[i];
		if ((slot < BFIN_TDM_DAI_MAX_SLOTS) &&
				(!(rx_mapped & (1 << slot)))) {
			bf5xx_tdm.rx_map[i] = slot;
			rx_mapped |= 1 << slot;
		} else
			return -EINVAL;
	}

	return 0;
}

#ifdef CONFIG_PM
static int bf5xx_tdm_suspend(struct snd_soc_dai *dai)
{
	struct sport_device *sport = dai->private_data;

	if (!dai->active)
		return 0;
	if (dai->capture_active)
		sport_rx_stop(sport);
	if (dai->playback_active)
		sport_tx_stop(sport);
	return 0;
}

static int bf5xx_tdm_resume(struct snd_soc_dai *dai)
{
	int ret;
	struct sport_device *sport = snd_soc_dai_get_drvdata(dai);

	if (!dai->active)
		return 0;

	ret = sport_set_multichannel(sport, 8, 0xFF, 1);
	if (ret) {
		pr_err("SPORT is busy!\n");
		ret = -EBUSY;
	}

	ret = sport_config_rx(sport, IRFS, 0x1F, 0, 0);
	if (ret) {
		pr_err("SPORT is busy!\n");
		ret = -EBUSY;
	}

	ret = sport_config_tx(sport, ITFS, 0x1F, 0, 0);
	if (ret) {
		pr_err("SPORT is busy!\n");
		ret = -EBUSY;
	}

	return 0;
}

#else
#define bf5xx_tdm_suspend      NULL
#define bf5xx_tdm_resume       NULL
#endif

static struct snd_soc_dai_ops bf5xx_tdm_dai_ops = {
	.hw_params      = bf5xx_tdm_hw_params,
	.set_fmt        = bf5xx_tdm_set_dai_fmt,
	.shutdown       = bf5xx_tdm_shutdown,
	.set_channel_map   = bf5xx_tdm_set_channel_map,
};

static struct snd_soc_dai_driver bf5xx_tdm_dai = {
	.suspend = bf5xx_tdm_suspend,
	.resume = bf5xx_tdm_resume,
	.playback = {
		.channels_min = 2,
		.channels_max = 8,
		.rates = SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S32_LE,},
	.capture = {
		.channels_min = 2,
		.channels_max = 8,
		.rates = SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S32_LE,},
	.ops = &bf5xx_tdm_dai_ops,
};

static int __devinit bfin_tdm_probe(struct platform_device *pdev)
{
	int ret = 0;

	if (peripheral_request_list(&sport_req[sport_num][0], "soc-audio")) {
		pr_err("Requesting Peripherals failed\n");
		return -EFAULT;
	}

	/* request DMA for SPORT */
	sport_handle = sport_init(&sport_params[sport_num], 4, \
		8 * sizeof(u32), NULL);
	if (!sport_handle) {
		peripheral_free_list(&sport_req[sport_num][0]);
		return -ENODEV;
	}

	/* SPORT works in TDM mode */
	ret = sport_set_multichannel(sport_handle, 8, 0xFF, 1);
	if (ret) {
		pr_err("SPORT is busy!\n");
		ret = -EBUSY;
		goto sport_config_err;
	}

	ret = sport_config_rx(sport_handle, IRFS, 0x1F, 0, 0);
	if (ret) {
		pr_err("SPORT is busy!\n");
		ret = -EBUSY;
		goto sport_config_err;
	}

	ret = sport_config_tx(sport_handle, ITFS, 0x1F, 0, 0);
	if (ret) {
		pr_err("SPORT is busy!\n");
		ret = -EBUSY;
		goto sport_config_err;
	}

	ret = snd_soc_register_dai(&pdev->dev, &bf5xx_tdm_dai);
	if (ret) {
		pr_err("Failed to register DAI: %d\n", ret);
		goto sport_config_err;
	}

	sport_handle->private_data = &bf5xx_tdm;
	return 0;

sport_config_err:
	peripheral_free_list(&sport_req[sport_num][0]);
	return ret;
}

static int __devexit bfin_tdm_remove(struct platform_device *pdev)
{
	peripheral_free_list(&sport_req[sport_num][0]);
	snd_soc_unregister_dai(&pdev->dev);

	return 0;
}

static struct platform_driver bfin_tdm_driver = {
	.probe  = bfin_tdm_probe,
	.remove = __devexit_p(bfin_tdm_remove),
	.driver = {
		.name   = "bfin-tdm",
		.owner  = THIS_MODULE,
	},
};

static int __init bfin_tdm_init(void)
{
	return platform_driver_register(&bfin_tdm_driver);
}
module_init(bfin_tdm_init);

static void __exit bfin_tdm_exit(void)
{
	platform_driver_unregister(&bfin_tdm_driver);
}
module_exit(bfin_tdm_exit);

/* Module information */
MODULE_AUTHOR("Barry Song");
MODULE_DESCRIPTION("TDM driver for ADI Blackfin");
MODULE_LICENSE("GPL");