aboutsummaryrefslogtreecommitdiff
path: root/drivers/mfd/davinci_voicecodec.c
blob: e5c8bc998eb4e4fb558a2437408f7d491077c42f (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
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * DaVinci Voice Codec Core Interface for TI platforms
 *
 * Copyright (C) 2010 Texas Instruments, Inc
 *
 * Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
 */

#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 <linux/regmap.h>

#include <sound/pcm.h>

#include <linux/mfd/davinci_voicecodec.h>

static const struct regmap_config davinci_vc_regmap = {
	.reg_bits = 32,
	.val_bits = 32,
};

static int __init davinci_vc_probe(struct platform_device *pdev)
{
	struct davinci_vc *davinci_vc;
	struct resource *res;
	struct mfd_cell *cell = NULL;
	dma_addr_t fifo_base;
	int ret;

	davinci_vc = devm_kzalloc(&pdev->dev,
				  sizeof(struct davinci_vc), GFP_KERNEL);
	if (!davinci_vc)
		return -ENOMEM;

	davinci_vc->clk = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(davinci_vc->clk)) {
		dev_dbg(&pdev->dev,
			    "could not get the clock for voice codec\n");
		return -ENODEV;
	}
	clk_enable(davinci_vc->clk);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	fifo_base = (dma_addr_t)res->start;
	davinci_vc->base = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(davinci_vc->base)) {
		ret = PTR_ERR(davinci_vc->base);
		goto fail;
	}

	davinci_vc->regmap = devm_regmap_init_mmio(&pdev->dev,
						   davinci_vc->base,
						   &davinci_vc_regmap);
	if (IS_ERR(davinci_vc->regmap)) {
		ret = PTR_ERR(davinci_vc->regmap);
		goto fail;
	}

	res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
	if (!res) {
		dev_err(&pdev->dev, "no DMA resource\n");
		ret = -ENXIO;
		goto fail;
	}

	davinci_vc->davinci_vcif.dma_tx_channel = res->start;
	davinci_vc->davinci_vcif.dma_tx_addr = fifo_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 fail;
	}

	davinci_vc->davinci_vcif.dma_rx_channel = res->start;
	davinci_vc->davinci_vcif.dma_rx_addr = fifo_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->platform_data = davinci_vc;
	cell->pdata_size = sizeof(*davinci_vc);

	/* Voice codec CQ93VC client */
	cell = &davinci_vc->cells[DAVINCI_VC_CQ93VC_CELL];
	cell->name = "cq93vc-codec";
	cell->platform_data = davinci_vc;
	cell->pdata_size = sizeof(*davinci_vc);

	ret = mfd_add_devices(&pdev->dev, pdev->id, davinci_vc->cells,
			      DAVINCI_VC_CELLS, NULL, 0, NULL);
	if (ret != 0) {
		dev_err(&pdev->dev, "fail to register client devices\n");
		goto fail;
	}

	return 0;

fail:
	clk_disable(davinci_vc->clk);

	return ret;
}

static int davinci_vc_remove(struct platform_device *pdev)
{
	struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);

	mfd_remove_devices(&pdev->dev);

	clk_disable(davinci_vc->clk);

	return 0;
}

static struct platform_driver davinci_vc_driver = {
	.driver	= {
		.name = "davinci_voicecodec",
	},
	.remove	= davinci_vc_remove,
};

module_platform_driver_probe(davinci_vc_driver, davinci_vc_probe);

MODULE_AUTHOR("Miguel Aguilar");
MODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface");
MODULE_LICENSE("GPL");