Merge branch 'fixes' of http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur...
[pandora-kernel.git] / arch / arm / plat-omap / include / plat / omap_device.h
1 /*
2  * omap_device headers
3  *
4  * Copyright (C) 2009 Nokia Corporation
5  * Paul Walmsley
6  *
7  * Developed in collaboration with (alphabetical order): Benoit
8  * Cousson, Kevin Hilman, Tony Lindgren, Rajendra Nayak, Vikram
9  * Pandita, Sakari Poussa, Anand Sawant, Santosh Shilimkar, Richard
10  * Woodruff
11  *
12  * This program is free software; you can redistribute it and/or modify
13  * it under the terms of the GNU General Public License version 2 as
14  * published by the Free Software Foundation.
15  *
16  * Eventually this type of functionality should either be
17  * a) implemented via arch-specific pointers in platform_device
18  * or
19  * b) implemented as a proper omap_bus/omap_device in Linux, no more
20  *    platform_device
21  *
22  * omap_device differs from omap_hwmod in that it includes external
23  * (e.g., board- and system-level) integration details.  omap_hwmod
24  * stores hardware data that is invariant for a given OMAP chip.
25  *
26  * To do:
27  * - GPIO integration
28  * - regulator integration
29  *
30  */
31 #ifndef __ARCH_ARM_PLAT_OMAP_INCLUDE_MACH_OMAP_DEVICE_H
32 #define __ARCH_ARM_PLAT_OMAP_INCLUDE_MACH_OMAP_DEVICE_H
33
34 #include <linux/kernel.h>
35 #include <linux/platform_device.h>
36
37 #include <plat/omap_hwmod.h>
38
39 extern struct device omap_device_parent;
40
41 /* omap_device._state values */
42 #define OMAP_DEVICE_STATE_UNKNOWN       0
43 #define OMAP_DEVICE_STATE_ENABLED       1
44 #define OMAP_DEVICE_STATE_IDLE          2
45 #define OMAP_DEVICE_STATE_SHUTDOWN      3
46
47 /* omap_device.flags values */
48 #define OMAP_DEVICE_SUSPENDED BIT(0)
49 #define OMAP_DEVICE_NO_IDLE_ON_SUSPEND BIT(1)
50
51 /**
52  * struct omap_device - omap_device wrapper for platform_devices
53  * @pdev: platform_device
54  * @hwmods: (one .. many per omap_device)
55  * @hwmods_cnt: ARRAY_SIZE() of @hwmods
56  * @pm_lats: ptr to an omap_device_pm_latency table
57  * @pm_lats_cnt: ARRAY_SIZE() of what is passed to @pm_lats
58  * @pm_lat_level: array index of the last odpl entry executed - -1 if never
59  * @dev_wakeup_lat: dev wakeup latency in nanoseconds
60  * @_dev_wakeup_lat_limit: dev wakeup latency limit in nsec - set by OMAP PM
61  * @_state: one of OMAP_DEVICE_STATE_* (see above)
62  * @flags: device flags
63  *
64  * Integrates omap_hwmod data into Linux platform_device.
65  *
66  * Field names beginning with underscores are for the internal use of
67  * the omap_device code.
68  *
69  */
70 struct omap_device {
71         struct platform_device          *pdev;
72         struct omap_hwmod               **hwmods;
73         struct omap_device_pm_latency   *pm_lats;
74         u32                             dev_wakeup_lat;
75         u32                             _dev_wakeup_lat_limit;
76         u8                              pm_lats_cnt;
77         s8                              pm_lat_level;
78         u8                              hwmods_cnt;
79         u8                              _state;
80         u8                              flags;
81 };
82
83 /* Device driver interface (call via platform_data fn ptrs) */
84
85 int omap_device_enable(struct platform_device *pdev);
86 int omap_device_idle(struct platform_device *pdev);
87 int omap_device_shutdown(struct platform_device *pdev);
88
89 /* Core code interface */
90
91 struct platform_device *omap_device_build(const char *pdev_name, int pdev_id,
92                                       struct omap_hwmod *oh, void *pdata,
93                                       int pdata_len,
94                                       struct omap_device_pm_latency *pm_lats,
95                                       int pm_lats_cnt, int is_early_device);
96
97 struct platform_device *omap_device_build_ss(const char *pdev_name, int pdev_id,
98                                          struct omap_hwmod **oh, int oh_cnt,
99                                          void *pdata, int pdata_len,
100                                          struct omap_device_pm_latency *pm_lats,
101                                          int pm_lats_cnt, int is_early_device);
102
103 void __iomem *omap_device_get_rt_va(struct omap_device *od);
104 struct device *omap_device_get_by_hwmod_name(const char *oh_name);
105
106 /* OMAP PM interface */
107 int omap_device_align_pm_lat(struct platform_device *pdev,
108                              u32 new_wakeup_lat_limit);
109 struct powerdomain *omap_device_get_pwrdm(struct omap_device *od);
110 int omap_device_get_context_loss_count(struct platform_device *pdev);
111
112 /* Other */
113
114 int omap_device_idle_hwmods(struct omap_device *od);
115 int omap_device_enable_hwmods(struct omap_device *od);
116
117 int omap_device_disable_clocks(struct omap_device *od);
118 int omap_device_enable_clocks(struct omap_device *od);
119
120 /*
121  * Entries should be kept in latency order ascending
122  *
123  * deact_lat is the maximum number of microseconds required to complete
124  * deactivate_func() at the device's slowest OPP.
125  *
126  * act_lat is the maximum number of microseconds required to complete
127  * activate_func() at the device's slowest OPP.
128  *
129  * This will result in some suboptimal power management decisions at fast
130  * OPPs, but avoids having to recompute all device power management decisions
131  * if the system shifts from a fast OPP to a slow OPP (in order to meet
132  * latency requirements).
133  *
134  * XXX should deactivate_func/activate_func() take platform_device pointers
135  * rather than omap_device pointers?
136  */
137 struct omap_device_pm_latency {
138         u32 deactivate_lat;
139         u32 deactivate_lat_worst;
140         int (*deactivate_func)(struct omap_device *od);
141         u32 activate_lat;
142         u32 activate_lat_worst;
143         int (*activate_func)(struct omap_device *od);
144         u32 flags;
145 };
146
147 #define OMAP_DEVICE_LATENCY_AUTO_ADJUST BIT(1)
148
149 /* Get omap_device pointer from platform_device pointer */
150 static inline struct omap_device *to_omap_device(struct platform_device *pdev)
151 {
152         return pdev ? pdev->archdata.od : NULL;
153 }
154
155 static inline
156 void omap_device_disable_idle_on_suspend(struct platform_device *pdev)
157 {
158         struct omap_device *od = to_omap_device(pdev);
159
160         od->flags |= OMAP_DEVICE_NO_IDLE_ON_SUSPEND;
161 }
162
163 #endif