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
|
/*
* DaVinci Voice Codec Core Interface for TI platforms
*
* Copyright (C) 2010 Texas Instruments, Inc
*
* Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <sound/pcm.h>
#include <linux/mfd/davinci_voicecodec.h>
u32 davinci_vc_read(struct davinci_vc *davinci_vc, int reg)
{
return __raw_readl(davinci_vc->base + reg);
}
void davinci_vc_write(struct davinci_vc *davinci_vc,
int reg, u32 val)
{
__raw_writel(val, davinci_vc->base + reg);
}
static int __init davinci_vc_probe(struct platform_device *pdev)
{
struct davinci_vc *davinci_vc;
struct resource *res, *mem;
struct mfd_cell *cell = NULL;
int ret;
davinci_vc = kzalloc(sizeof(struct davinci_vc), GFP_KERNEL);
if (!davinci_vc) {
dev_dbg(&pdev->dev,
"could not allocate memory for private data\n");
return -ENOMEM;
}
davinci_vc->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(davinci_vc->clk)) {
dev_dbg(&pdev->dev,
"could not get the clock for voice codec\n");
ret = -ENODEV;
goto fail1;
}
clk_enable(davinci_vc->clk);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "no mem resource\n");
ret = -ENODEV;
goto fail2;
}
davinci_vc->pbase = res->start;
davinci_vc->base_size = resource_size(res);
mem = request_mem_region(davinci_vc->pbase, davinci_vc->base_size,
pdev->name);
if (!mem) {
dev_err(&pdev->dev, "VCIF region already claimed\n");
ret = -EBUSY;
goto fail2;
}
davinci_vc->base = ioremap(davinci_vc->pbase, davinci_vc->base_size);
if (!davinci_vc->base) {
dev_err(&pdev->dev, "can't ioremap mem resource.\n");
ret = -ENOMEM;
goto fail3;
}
res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
if (!res) {
dev_err(&pdev->dev, "no DMA resource\n");
ret = -ENXIO;
goto fail4;
}
davinci_vc->davinci_vcif.dma_tx_channel = res->start;
davinci_vc->davinci_vcif.dma_tx_addr =
(dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_WFIFO);
res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
if (!res) {
dev_err(&pdev->dev, "no DMA resource\n");
ret = -ENXIO;
goto fail4;
}
davinci_vc->davinci_vcif.dma_rx_channel = res->start;
davinci_vc->davinci_vcif.dma_rx_addr =
(dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_RFIFO);
davinci_vc->dev = &pdev->dev;
davinci_vc->pdev = pdev;
/* Voice codec interface client */
cell = &davinci_vc->cells[DAVINCI_VC_VCIF_CELL];
cell->name = "davinci_vcif";
cell->driver_data = davinci_vc;
/* Voice codec CQ93VC client */
cell = &davinci_vc->cells[DAVINCI_VC_CQ93VC_CELL];
cell->name = "cq93vc";
cell->driver_data = davinci_vc;
ret = mfd_add_devices(&pdev->dev, pdev->id, davinci_vc->cells,
DAVINCI_VC_CELLS, NULL, 0);
if (ret != 0) {
dev_err(&pdev->dev, "fail to register client devices\n");
goto fail4;
}
return 0;
fail4:
iounmap(davinci_vc->base);
fail3:
release_mem_region(davinci_vc->pbase, davinci_vc->base_size);
fail2:
clk_disable(davinci_vc->clk);
clk_put(davinci_vc->clk);
davinci_vc->clk = NULL;
fail1:
kfree(davinci_vc);
return ret;
}
static int __devexit davinci_vc_remove(struct platform_device *pdev)
{
struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
mfd_remove_devices(&pdev->dev);
iounmap(davinci_vc->base);
release_mem_region(davinci_vc->pbase, davinci_vc->base_size);
clk_disable(davinci_vc->clk);
clk_put(davinci_vc->clk);
davinci_vc->clk = NULL;
kfree(davinci_vc);
return 0;
}
static struct platform_driver davinci_vc_driver = {
.driver = {
.name = "davinci_voicecodec",
.owner = THIS_MODULE,
},
.remove = __devexit_p(davinci_vc_remove),
};
static int __init davinci_vc_init(void)
{
return platform_driver_probe(&davinci_vc_driver, davinci_vc_probe);
}
module_init(davinci_vc_init);
static void __exit davinci_vc_exit(void)
{
platform_driver_unregister(&davinci_vc_driver);
}
module_exit(davinci_vc_exit);
MODULE_AUTHOR("Miguel Aguilar");
MODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface");
MODULE_LICENSE("GPL");
|
