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
|
/*
* omap-hdmi.c
*
* OMAP ALSA SoC DAI driver for HDMI audio on OMAP4 processors.
* Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com/
* Authors: Jorge Candelaria <jorge.candelaria@ti.com>
* Ricardo Neri <ricardo.neri@ti.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* 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, 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 <video/omapdss.h>
#include <plat/dma.h>
#include "omap-pcm.h"
#include "omap-hdmi.h"
#define DRV_NAME "omap-hdmi-audio-dai"
struct hdmi_priv {
struct omap_pcm_dma_data dma_params;
struct omap_dss_device *dssdev;
};
static int omap_hdmi_dai_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
int err;
/*
* Make sure that the period bytes are multiple of the DMA packet size.
* Largest packet size we use is 32 32-bit words = 128 bytes
*/
err = snd_pcm_hw_constraint_step(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 128);
if (err < 0)
return err;
return 0;
}
static int omap_hdmi_dai_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
return priv->dssdev->driver->audio_enable(priv->dssdev);
}
static int omap_hdmi_dai_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
int err = 0;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
priv->dma_params.packet_size = 16;
break;
case SNDRV_PCM_FORMAT_S24_LE:
priv->dma_params.packet_size = 32;
break;
default:
err = -EINVAL;
}
priv->dma_params.data_type = OMAP_DMA_DATA_TYPE_S32;
snd_soc_dai_set_dma_data(dai, substream,
&priv->dma_params);
return err;
}
static int omap_hdmi_dai_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
int err = 0;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
err = priv->dssdev->driver->audio_start(priv->dssdev);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
priv->dssdev->driver->audio_stop(priv->dssdev);
break;
default:
err = -EINVAL;
}
return err;
}
static void omap_hdmi_dai_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
priv->dssdev->driver->audio_disable(priv->dssdev);
}
static const struct snd_soc_dai_ops omap_hdmi_dai_ops = {
.startup = omap_hdmi_dai_startup,
.hw_params = omap_hdmi_dai_hw_params,
};
static struct snd_soc_dai_driver omap_hdmi_dai = {
.playback = {
.channels_min = 2,
.channels_max = 2,
.rates = OMAP_HDMI_RATES,
.formats = OMAP_HDMI_FORMATS,
},
.ops = &omap_hdmi_dai_ops,
};
static __devinit int omap_hdmi_probe(struct platform_device *pdev)
{
int ret;
struct resource *hdmi_rsrc;
struct hdmi_priv *hdmi_data;
bool hdmi_dev_found = false;
hdmi_data = devm_kzalloc(&pdev->dev, sizeof(*hdmi_data), GFP_KERNEL);
if (hdmi_data == NULL) {
dev_err(&pdev->dev, "Cannot allocate memory for HDMI data\n");
return -ENOMEM;
}
hdmi_rsrc = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!hdmi_rsrc) {
dev_err(&pdev->dev, "Cannot obtain IORESOURCE_MEM HDMI\n");
return -ENODEV;
}
hdmi_data->dma_params.port_addr = hdmi_rsrc->start
+ OMAP_HDMI_AUDIO_DMA_PORT;
hdmi_rsrc = platform_get_resource(pdev, IORESOURCE_DMA, 0);
if (!hdmi_rsrc) {
dev_err(&pdev->dev, "Cannot obtain IORESOURCE_DMA HDMI\n");
return -ENODEV;
}
hdmi_data->dma_params.dma_req = hdmi_rsrc->start;
hdmi_data->dma_params.name = "HDMI playback";
hdmi_data->dma_params.sync_mode = OMAP_DMA_SYNC_PACKET;
/*
* TODO: We assume that there is only one DSS HDMI device. Future
* OMAP implementations may support more than one HDMI devices and
* we should provided separate audio support for all of them.
*/
/* Find an HDMI device. */
for_each_dss_dev(hdmi_data->dssdev) {
omap_dss_get_device(hdmi_data->dssdev);
if (!hdmi_data->dssdev->driver) {
omap_dss_put_device(hdmi_data->dssdev);
continue;
}
if (hdmi_data->dssdev->type == OMAP_DISPLAY_TYPE_HDMI) {
hdmi_dev_found = true;
break;
}
}
if (!hdmi_dev_found) {
dev_err(&pdev->dev, "no driver for HDMI display found\n");
return -ENODEV;
}
dev_set_drvdata(&pdev->dev, hdmi_data);
ret = snd_soc_register_dai(&pdev->dev, &omap_hdmi_dai);
return ret;
}
static int __devexit omap_hdmi_remove(struct platform_device *pdev)
{
struct hdmi_priv *hdmi_data = dev_get_drvdata(&pdev->dev);
snd_soc_unregister_dai(&pdev->dev);
if (hdmi_data == NULL) {
dev_err(&pdev->dev, "cannot obtain HDMi data\n");
return -ENODEV;
}
omap_dss_put_device(hdmi_data->dssdev);
return 0;
}
static struct platform_driver hdmi_dai_driver = {
.driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
},
.probe = omap_hdmi_probe,
.remove = __devexit_p(omap_hdmi_remove),
};
module_platform_driver(hdmi_dai_driver);
MODULE_AUTHOR("Jorge Candelaria <jorge.candelaria@ti.com>");
MODULE_AUTHOR("Ricardo Neri <ricardo.neri@ti.com>");
MODULE_DESCRIPTION("OMAP HDMI SoC Interface");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRV_NAME);
|
