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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> |
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 | |
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; |
49 | struct resource *res, *mem; |
50 | struct mfd_cell *cell = NULL; |
51 | int ret; |
52 | |
53 | davinci_vc = kzalloc(sizeof(struct davinci_vc), GFP_KERNEL); |
54 | if (!davinci_vc) { |
55 | dev_dbg(&pdev->dev, |
56 | "could not allocate memory for private data\n"); |
57 | return -ENOMEM; |
58 | } |
59 | |
60 | davinci_vc->clk = clk_get(&pdev->dev, NULL); |
61 | if (IS_ERR(davinci_vc->clk)) { |
62 | dev_dbg(&pdev->dev, |
63 | "could not get the clock for voice codec\n"); |
64 | ret = -ENODEV; |
65 | goto fail1; |
66 | } |
67 | clk_enable(davinci_vc->clk); |
68 | |
69 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
70 | if (!res) { |
71 | dev_err(&pdev->dev, "no mem resource\n"); |
72 | ret = -ENODEV; |
73 | goto fail2; |
74 | } |
75 | |
76 | davinci_vc->pbase = res->start; |
77 | davinci_vc->base_size = resource_size(res); |
78 | |
79 | mem = request_mem_region(davinci_vc->pbase, davinci_vc->base_size, |
80 | pdev->name); |
81 | if (!mem) { |
82 | dev_err(&pdev->dev, "VCIF region already claimed\n"); |
83 | ret = -EBUSY; |
84 | goto fail2; |
85 | } |
86 | |
87 | davinci_vc->base = ioremap(davinci_vc->pbase, davinci_vc->base_size); |
88 | if (!davinci_vc->base) { |
89 | dev_err(&pdev->dev, "can't ioremap mem resource.\n"); |
90 | ret = -ENOMEM; |
91 | goto fail3; |
92 | } |
93 | |
94 | res = platform_get_resource(pdev, IORESOURCE_DMA, 0); |
95 | if (!res) { |
96 | dev_err(&pdev->dev, "no DMA resource\n"); |
97 | ret = -ENXIO; |
98 | goto fail4; |
99 | } |
100 | |
101 | davinci_vc->davinci_vcif.dma_tx_channel = res->start; |
102 | davinci_vc->davinci_vcif.dma_tx_addr = |
103 | (dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_WFIFO); |
104 | |
105 | res = platform_get_resource(pdev, IORESOURCE_DMA, 1); |
106 | if (!res) { |
107 | dev_err(&pdev->dev, "no DMA resource\n"); |
108 | ret = -ENXIO; |
109 | goto fail4; |
110 | } |
111 | |
112 | davinci_vc->davinci_vcif.dma_rx_channel = res->start; |
113 | davinci_vc->davinci_vcif.dma_rx_addr = |
114 | (dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_RFIFO); |
115 | |
116 | davinci_vc->dev = &pdev->dev; |
117 | davinci_vc->pdev = pdev; |
118 | |
119 | /* Voice codec interface client */ |
120 | cell = &davinci_vc->cells[DAVINCI_VC_VCIF_CELL]; |
121 | cell->name = "davinci-vcif"; |
122 | cell->platform_data = davinci_vc; |
123 | cell->pdata_size = sizeof(*davinci_vc); |
124 | |
125 | /* Voice codec CQ93VC client */ |
126 | cell = &davinci_vc->cells[DAVINCI_VC_CQ93VC_CELL]; |
127 | cell->name = "cq93vc-codec"; |
128 | cell->platform_data = davinci_vc; |
129 | cell->pdata_size = sizeof(*davinci_vc); |
130 | |
131 | ret = mfd_add_devices(&pdev->dev, pdev->id, davinci_vc->cells, |
132 | DAVINCI_VC_CELLS, NULL, 0, NULL); |
133 | if (ret != 0) { |
134 | dev_err(&pdev->dev, "fail to register client devices\n"); |
135 | goto fail4; |
136 | } |
137 | |
138 | return 0; |
139 | |
140 | fail4: |
141 | iounmap(davinci_vc->base); |
142 | fail3: |
143 | release_mem_region(davinci_vc->pbase, davinci_vc->base_size); |
144 | fail2: |
145 | clk_disable(davinci_vc->clk); |
146 | clk_put(davinci_vc->clk); |
147 | davinci_vc->clk = NULL; |
148 | fail1: |
149 | kfree(davinci_vc); |
150 | |
151 | return ret; |
152 | } |
153 | |
154 | static int davinci_vc_remove(struct platform_device *pdev) |
155 | { |
156 | struct davinci_vc *davinci_vc = platform_get_drvdata(pdev); |
157 | |
158 | mfd_remove_devices(&pdev->dev); |
159 | |
160 | iounmap(davinci_vc->base); |
161 | release_mem_region(davinci_vc->pbase, davinci_vc->base_size); |
162 | |
163 | clk_disable(davinci_vc->clk); |
164 | clk_put(davinci_vc->clk); |
165 | davinci_vc->clk = NULL; |
166 | |
167 | kfree(davinci_vc); |
168 | |
169 | return 0; |
170 | } |
171 | |
172 | static struct platform_driver davinci_vc_driver = { |
173 | .driver = { |
174 | .name = "davinci_voicecodec", |
175 | .owner = THIS_MODULE, |
176 | }, |
177 | .remove = davinci_vc_remove, |
178 | }; |
179 | |
180 | static int __init davinci_vc_init(void) |
181 | { |
182 | return platform_driver_probe(&davinci_vc_driver, davinci_vc_probe); |
183 | } |
184 | module_init(davinci_vc_init); |
185 | |
186 | static void __exit davinci_vc_exit(void) |
187 | { |
188 | platform_driver_unregister(&davinci_vc_driver); |
189 | } |
190 | module_exit(davinci_vc_exit); |
191 | |
192 | MODULE_AUTHOR("Miguel Aguilar"); |
193 | MODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface"); |
194 | MODULE_LICENSE("GPL"); |
195 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
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