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ca26308c MA |
1 | /* |
2 | * DaVinci Voice Codec Core Interface for TI platforms | |
3 | * | |
4 | * Copyright (C) 2010 Texas Instruments, Inc | |
5 | * | |
6 | * Author: Miguel Aguilar <miguel.aguilar@ridgerun.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | */ | |
22 | ||
23 | #include <linux/init.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/device.h> | |
8c0d8fa2 | 26 | #include <linux/slab.h> |
ca26308c MA |
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 | ||
35 | u32 davinci_vc_read(struct davinci_vc *davinci_vc, int reg) | |
36 | { | |
37 | return __raw_readl(davinci_vc->base + reg); | |
38 | } | |
39 | ||
40 | void davinci_vc_write(struct davinci_vc *davinci_vc, | |
41 | int reg, u32 val) | |
42 | { | |
43 | __raw_writel(val, davinci_vc->base + reg); | |
44 | } | |
45 | ||
46 | static int __init davinci_vc_probe(struct platform_device *pdev) | |
47 | { | |
48 | struct davinci_vc *davinci_vc; | |
c8eaed45 | 49 | struct resource *res; |
ca26308c MA |
50 | struct mfd_cell *cell = NULL; |
51 | int ret; | |
52 | ||
099053a4 LJ |
53 | davinci_vc = devm_kzalloc(&pdev->dev, |
54 | sizeof(struct davinci_vc), GFP_KERNEL); | |
ca26308c MA |
55 | if (!davinci_vc) { |
56 | dev_dbg(&pdev->dev, | |
57 | "could not allocate memory for private data\n"); | |
58 | return -ENOMEM; | |
59 | } | |
60 | ||
c8eaed45 | 61 | davinci_vc->clk = devm_clk_get(&pdev->dev, NULL); |
ca26308c MA |
62 | if (IS_ERR(davinci_vc->clk)) { |
63 | dev_dbg(&pdev->dev, | |
64 | "could not get the clock for voice codec\n"); | |
099053a4 | 65 | return -ENODEV; |
ca26308c MA |
66 | } |
67 | clk_enable(davinci_vc->clk); | |
68 | ||
69 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
ca26308c | 70 | |
c8eaed45 SK |
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; | |
ca26308c MA |
75 | } |
76 | ||
77 | res = platform_get_resource(pdev, IORESOURCE_DMA, 0); | |
78 | if (!res) { | |
79 | dev_err(&pdev->dev, "no DMA resource\n"); | |
e2bde787 | 80 | ret = -ENXIO; |
c8eaed45 | 81 | goto fail; |
ca26308c MA |
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"); | |
e2bde787 | 91 | ret = -ENXIO; |
c8eaed45 | 92 | goto fail; |
ca26308c MA |
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 | /* Voice codec interface client */ | |
103 | cell = &davinci_vc->cells[DAVINCI_VC_VCIF_CELL]; | |
73ee6524 | 104 | cell->name = "davinci-vcif"; |
cb5811cf SO |
105 | cell->platform_data = davinci_vc; |
106 | cell->pdata_size = sizeof(*davinci_vc); | |
ca26308c MA |
107 | |
108 | /* Voice codec CQ93VC client */ | |
109 | cell = &davinci_vc->cells[DAVINCI_VC_CQ93VC_CELL]; | |
73ee6524 | 110 | cell->name = "cq93vc-codec"; |
cb5811cf SO |
111 | cell->platform_data = davinci_vc; |
112 | cell->pdata_size = sizeof(*davinci_vc); | |
ca26308c MA |
113 | |
114 | ret = mfd_add_devices(&pdev->dev, pdev->id, davinci_vc->cells, | |
0848c94f | 115 | DAVINCI_VC_CELLS, NULL, 0, NULL); |
ca26308c MA |
116 | if (ret != 0) { |
117 | dev_err(&pdev->dev, "fail to register client devices\n"); | |
c8eaed45 | 118 | goto fail; |
ca26308c MA |
119 | } |
120 | ||
121 | return 0; | |
122 | ||
c8eaed45 | 123 | fail: |
ca26308c | 124 | clk_disable(davinci_vc->clk); |
ca26308c MA |
125 | |
126 | return ret; | |
127 | } | |
128 | ||
4740f73f | 129 | static int davinci_vc_remove(struct platform_device *pdev) |
ca26308c MA |
130 | { |
131 | struct davinci_vc *davinci_vc = platform_get_drvdata(pdev); | |
132 | ||
133 | mfd_remove_devices(&pdev->dev); | |
134 | ||
ca26308c | 135 | clk_disable(davinci_vc->clk); |
ca26308c | 136 | |
ca26308c MA |
137 | return 0; |
138 | } | |
139 | ||
140 | static struct platform_driver davinci_vc_driver = { | |
141 | .driver = { | |
142 | .name = "davinci_voicecodec", | |
143 | .owner = THIS_MODULE, | |
144 | }, | |
84449216 | 145 | .remove = davinci_vc_remove, |
ca26308c MA |
146 | }; |
147 | ||
3de764d4 | 148 | module_platform_driver_probe(davinci_vc_driver, davinci_vc_probe); |
ca26308c MA |
149 | |
150 | MODULE_AUTHOR("Miguel Aguilar"); | |
151 | MODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface"); | |
152 | MODULE_LICENSE("GPL"); |