[Blackfin] arch: Fix bug to Enable kernel to build for bf548 with PM.
[linux-2.6.git] / arch / blackfin / mach-common / pm.c
1 /*
2  * File:         arch/blackfin/mach-common/pm.c
3  * Based on:     arm/mach-omap/pm.c
4  * Author:       Cliff Brake <cbrake@accelent.com> Copyright (c) 2001
5  *
6  * Created:      2001
7  * Description:  Power management for the bfin
8  *
9  * Modified:     Nicolas Pitre - PXA250 support
10  *                Copyright (c) 2002 Monta Vista Software, Inc.
11  *               David Singleton - OMAP1510
12  *                Copyright (c) 2002 Monta Vista Software, Inc.
13  *               Dirk Behme <dirk.behme@de.bosch.com> - OMAP1510/1610
14  *                Copyright 2004
15  *               Copyright 2004-2006 Analog Devices Inc.
16  *
17  * Bugs:         Enter bugs at http://blackfin.uclinux.org/
18  *
19  * This program is free software; you can redistribute it and/or modify
20  * it under the terms of the GNU General Public License as published by
21  * the Free Software Foundation; either version 2 of the License, or
22  * (at your option) any later version.
23  *
24  * This program is distributed in the hope that it will be useful,
25  * but WITHOUT ANY WARRANTY; without even the implied warranty of
26  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
27  * GNU General Public License for more details.
28  *
29  * You should have received a copy of the GNU General Public License
30  * along with this program; if not, see the file COPYING, or write
31  * to the Free Software Foundation, Inc.,
32  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
33  */
34
35 #include <linux/suspend.h>
36 #include <linux/sched.h>
37 #include <linux/proc_fs.h>
38 #include <linux/io.h>
39 #include <linux/irq.h>
40
41 #include <asm/dpmc.h>
42 #include <asm/gpio.h>
43
44 #ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_H
45 #define WAKEUP_TYPE     PM_WAKE_HIGH
46 #endif
47
48 #ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_L
49 #define WAKEUP_TYPE     PM_WAKE_LOW
50 #endif
51
52 #ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_EDGE_F
53 #define WAKEUP_TYPE     PM_WAKE_FALLING
54 #endif
55
56 #ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_EDGE_R
57 #define WAKEUP_TYPE     PM_WAKE_RISING
58 #endif
59
60 #ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_EDGE_B
61 #define WAKEUP_TYPE     PM_WAKE_BOTH_EDGES
62 #endif
63
64 void bfin_pm_suspend_standby_enter(void)
65 {
66 #ifdef CONFIG_PM_WAKEUP_BY_GPIO
67         gpio_pm_wakeup_request(CONFIG_PM_WAKEUP_GPIO_NUMBER, WAKEUP_TYPE);
68 #endif
69
70 #if defined(CONFIG_PM_WAKEUP_BY_GPIO) || defined(CONFIG_PM_WAKEUP_GPIO_API)
71         {
72                 u32 flags;
73
74                 local_irq_save(flags);
75
76                 sleep_deeper(gpio_pm_setup()); /*Goto Sleep*/
77
78                 gpio_pm_restore();
79
80 #if defined(CONFIG_BF54x) || defined(CONFIG_BF52x)
81                 bfin_write_SIC_IWR0(IWR_ENABLE_ALL);
82                 bfin_write_SIC_IWR1(IWR_ENABLE_ALL);
83 # ifdef CONFIG_BF54x
84                 bfin_write_SIC_IWR2(IWR_ENABLE_ALL);
85 # endif
86 #else
87                 bfin_write_SIC_IWR(IWR_ENABLE_ALL);
88 #endif
89
90                 local_irq_restore(flags);
91         }
92 #endif
93
94 #if defined(CONFIG_PM_WAKEUP_GPIO_BY_SIC_IWR)
95         sleep_deeper(CONFIG_PM_WAKEUP_SIC_IWR);
96 # if defined(CONFIG_BF54x) || defined(CONFIG_BF52x)
97         bfin_write_SIC_IWR0(IWR_ENABLE_ALL);
98         bfin_write_SIC_IWR1(IWR_ENABLE_ALL);
99 #  ifdef CONFIG_BF54x
100         bfin_write_SIC_IWR2(IWR_ENABLE_ALL);
101 #  endif
102 # else
103         bfin_write_SIC_IWR(IWR_ENABLE_ALL);
104 # endif
105 #endif                          /* CONFIG_PM_WAKEUP_GPIO_BY_SIC_IWR */
106 }
107
108 /*
109  *      bfin_pm_valid - Tell the PM core that we only support the standby sleep
110  *                      state
111  *      @state:         suspend state we're checking.
112  *
113  */
114 static int bfin_pm_valid(suspend_state_t state)
115 {
116         return (state == PM_SUSPEND_STANDBY);
117 }
118
119 /*
120  *      bfin_pm_enter - Actually enter a sleep state.
121  *      @state:         State we're entering.
122  *
123  */
124 static int bfin_pm_enter(suspend_state_t state)
125 {
126         switch (state) {
127         case PM_SUSPEND_STANDBY:
128                 bfin_pm_suspend_standby_enter();
129                 break;
130
131         case PM_SUSPEND_MEM:
132                 return -ENOTSUPP;
133
134         default:
135                 return -EINVAL;
136         }
137
138         return 0;
139 }
140
141 struct platform_suspend_ops bfin_pm_ops = {
142         .enter = bfin_pm_enter,
143         .valid  = bfin_pm_valid,
144 };
145
146 static int __init bfin_pm_init(void)
147 {
148         suspend_set_ops(&bfin_pm_ops);
149         return 0;
150 }
151
152 __initcall(bfin_pm_init);