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23#include <linux/init.h>
24#include <linux/module.h>
25#include <linux/device.h>
26#include <linux/slab.h>
27#include <linux/delay.h>
28#include <linux/io.h>
29#include <linux/clk.h>
30
31#include <sound/pcm.h>
32
33#include <linux/mfd/davinci_voicecodec.h>
34
35u32 davinci_vc_read(struct davinci_vc *davinci_vc, int reg)
36{
37 return __raw_readl(davinci_vc->base + reg);
38}
39
40void davinci_vc_write(struct davinci_vc *davinci_vc,
41 int reg, u32 val)
42{
43 __raw_writel(val, davinci_vc->base + reg);
44}
45
46static int __init davinci_vc_probe(struct platform_device *pdev)
47{
48 struct davinci_vc *davinci_vc;
49 struct resource *res;
50 struct mfd_cell *cell = NULL;
51 int ret;
52
53 davinci_vc = devm_kzalloc(&pdev->dev,
54 sizeof(struct davinci_vc), GFP_KERNEL);
55 if (!davinci_vc) {
56 dev_dbg(&pdev->dev,
57 "could not allocate memory for private data\n");
58 return -ENOMEM;
59 }
60
61 davinci_vc->clk = devm_clk_get(&pdev->dev, NULL);
62 if (IS_ERR(davinci_vc->clk)) {
63 dev_dbg(&pdev->dev,
64 "could not get the clock for voice codec\n");
65 return -ENODEV;
66 }
67 clk_enable(davinci_vc->clk);
68
69 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
70
71 davinci_vc->base = devm_ioremap_resource(&pdev->dev, res);
72 if (IS_ERR(davinci_vc->base)) {
73 ret = PTR_ERR(davinci_vc->base);
74 goto fail;
75 }
76
77 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
78 if (!res) {
79 dev_err(&pdev->dev, "no DMA resource\n");
80 ret = -ENXIO;
81 goto fail;
82 }
83
84 davinci_vc->davinci_vcif.dma_tx_channel = res->start;
85 davinci_vc->davinci_vcif.dma_tx_addr =
86 (dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_WFIFO);
87
88 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
89 if (!res) {
90 dev_err(&pdev->dev, "no DMA resource\n");
91 ret = -ENXIO;
92 goto fail;
93 }
94
95 davinci_vc->davinci_vcif.dma_rx_channel = res->start;
96 davinci_vc->davinci_vcif.dma_rx_addr =
97 (dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_RFIFO);
98
99 davinci_vc->dev = &pdev->dev;
100 davinci_vc->pdev = pdev;
101
102
103 cell = &davinci_vc->cells[DAVINCI_VC_VCIF_CELL];
104 cell->name = "davinci-vcif";
105 cell->platform_data = davinci_vc;
106 cell->pdata_size = sizeof(*davinci_vc);
107
108
109 cell = &davinci_vc->cells[DAVINCI_VC_CQ93VC_CELL];
110 cell->name = "cq93vc-codec";
111 cell->platform_data = davinci_vc;
112 cell->pdata_size = sizeof(*davinci_vc);
113
114 ret = mfd_add_devices(&pdev->dev, pdev->id, davinci_vc->cells,
115 DAVINCI_VC_CELLS, NULL, 0, NULL);
116 if (ret != 0) {
117 dev_err(&pdev->dev, "fail to register client devices\n");
118 goto fail;
119 }
120
121 return 0;
122
123fail:
124 clk_disable(davinci_vc->clk);
125
126 return ret;
127}
128
129static int davinci_vc_remove(struct platform_device *pdev)
130{
131 struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
132
133 mfd_remove_devices(&pdev->dev);
134
135 clk_disable(davinci_vc->clk);
136
137 return 0;
138}
139
140static struct platform_driver davinci_vc_driver = {
141 .driver = {
142 .name = "davinci_voicecodec",
143 .owner = THIS_MODULE,
144 },
145 .remove = davinci_vc_remove,
146};
147
148module_platform_driver_probe(davinci_vc_driver, davinci_vc_probe);
149
150MODULE_AUTHOR("Miguel Aguilar");
151MODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface");
152MODULE_LICENSE("GPL");
153