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ARM: OMAP: Merge board specific files from N800 tree
[linux-2.6-omap-h63xx.git] / arch / arm / mach-omap2 / board-n800-dsp.c
1 /*
2  * linux/arch/arm/mach-omap2/board-n800-dsp.c
3  *
4  * Copyright (C) 2006 Nokia Corporation.
5  *
6  * Contact: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License
10  * version 2 as published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20  * 02110-1301 USA
21  *
22  */
23
24 #include <linux/kernel.h>
25 #include <linux/device.h>
26 #include <linux/list.h>
27 #include <linux/err.h>
28 #include <linux/clk.h>
29
30 #include <asm/io.h>
31 #include <asm/arch/clock.h>
32 #include <asm/arch/board.h>
33
34 #include "../plat-omap/dsp/dsp_common.h"
35
36 #if     defined(CONFIG_OMAP_DSP)
37
38 /*
39  * dsp peripheral device: AUDIO
40  */
41 static struct dsp_kfunc_device n800_audio_device = {
42         .name    = "audio",
43         .type    = DSP_KFUNC_DEV_TYPE_AUDIO,
44         .enable  = n800_audio_enable,
45         .disable = n800_audio_disable,
46 };
47
48 /*
49  * dsp peripheral device: TIMER
50  */
51 static int dsp_timer_probe(struct dsp_kfunc_device *kdev)
52 {
53         char clockname[20];
54
55         strcpy(clockname, kdev->name);
56         strcat(clockname, "_fck");
57
58         kdev->fck = clk_get(NULL, clockname);
59         if (IS_ERR(kdev->fck)) {
60                 printk(KERN_ERR "couldn't acquire %s\n", clockname);
61                 return PTR_ERR(kdev->fck);
62         }
63         pr_debug("%s probed successfully\n", clockname);
64
65         strcpy(clockname, kdev->name);
66         strcat(clockname, "_ick");
67         kdev->ick = clk_get(NULL, clockname);
68         if (IS_ERR(kdev->ick)) {
69                 printk(KERN_ERR "couldn't acquire %s\n", clockname);
70                 goto fail;
71         }
72         pr_debug("%s probed successfully\n", clockname);
73
74         return 0;
75  fail:
76         clk_put(kdev->fck);
77
78         return PTR_ERR(kdev->ick);
79 }
80
81 static int dsp_timer_remove(struct dsp_kfunc_device *kdev)
82 {
83         clk_put(kdev->ick);
84         clk_put(kdev->fck);
85         pr_debug("%s removed successfully\n", kdev->name);
86         return 0;
87 }
88
89 static int dsp_timer_enable(struct dsp_kfunc_device *kdev, int stage)
90 {
91         pr_debug("%s enabled(%d)\n", kdev->name, stage);
92
93         mutex_lock(&kdev->lock);
94
95         if (kdev->enabled)
96                 goto out;
97         kdev->enabled = 1;
98
99         clk_enable(kdev->fck);
100         clk_enable(kdev->ick);
101  out:
102         mutex_unlock(&kdev->lock);
103
104         return 0;
105 }
106
107 static int dsp_timer_disable(struct dsp_kfunc_device *kdev, int stage)
108 {
109         pr_debug("%s disabled(%d)\n", kdev->name, stage);
110
111         mutex_lock(&kdev->lock);
112
113         if (kdev->enabled == 0)
114                 goto out;
115         kdev->enabled = 0;
116
117         clk_disable(kdev->ick);
118         clk_disable(kdev->fck);
119  out:
120         mutex_unlock(&kdev->lock);
121
122         return 0;
123 }
124
125 static struct dsp_kfunc_device n800_timer_device = {
126         .name    = "gpt5",
127         .type    = DSP_KFUNC_DEV_TYPE_COMMON,
128         .probe   = dsp_timer_probe,
129         .remove  = dsp_timer_remove,
130         .enable  = dsp_timer_enable,
131         .disable = dsp_timer_disable,
132 };
133
134 static struct dsp_kfunc_device *n800_kfunc_dev[] = {
135         &n800_audio_device,
136         &n800_timer_device,
137 };
138
139 void __init n800_dsp_init(void)
140 {
141         int i, ret;
142         struct dsp_kfunc_device **p = n800_kfunc_dev;
143
144         for (i = 0; i < ARRAY_SIZE(n800_kfunc_dev); i++) {
145                 ret = dsp_kfunc_device_register(p[i]);
146                 if (ret) {
147                         printk(KERN_ERR
148                                "KFUNC device registration failed: %s\n",
149                                p[i]->name);
150                 }
151         }
152 }
153
154 #else
155 void __init n800_dsp_init(void) { }
156 #endif  /* CONFIG_OMAP_DSP */