arch/arm/mach-omap2/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  * This type of functionality should be implemented as a proper
  17  * omap_bus/omap_device in Linux.
  18  *
  19  * omap_device differs from omap_hwmod in that it includes external
  20  * (e.g., board- and system-level) integration details.  omap_hwmod
  21  * stores hardware data that is invariant for a given OMAP chip.
  22  */
  23 #ifndef __ARCH_ARM_PLAT_OMAP_INCLUDE_MACH_OMAP_DEVICE_H
  24 #define __ARCH_ARM_PLAT_OMAP_INCLUDE_MACH_OMAP_DEVICE_H
  25
  26 #include <linux/kernel.h>
  27 #include <linux/platform_device.h>
  28
  29 #include "omap_hwmod.h"
  30
  31 extern struct dev_pm_domain omap_device_pm_domain;
  32 extern struct dev_pm_domain omap_device_fail_pm_domain;
  33
  34 /* omap_device._state values */
  35 #define OMAP_DEVICE_STATE_UNKNOWN       0
  36 #define OMAP_DEVICE_STATE_ENABLED       1
  37 #define OMAP_DEVICE_STATE_IDLE          2
  38 #define OMAP_DEVICE_STATE_SHUTDOWN      3
  39
  40 /* omap_device.flags values */
  41 #define OMAP_DEVICE_SUSPENDED           BIT(0)
  42
  43 /**
  44  * struct omap_device - omap_device wrapper for platform_devices
  45  * @pdev: platform_device
  46  * @hwmods: (one .. many per omap_device)
  47  * @hwmods_cnt: ARRAY_SIZE() of @hwmods
  48  * @_state: one of OMAP_DEVICE_STATE_* (see above)
  49  * @flags: device flags
  50  * @_driver_status: one of BUS_NOTIFY_*_DRIVER from <linux/device.h>
  51  *
  52  * Integrates omap_hwmod data into Linux platform_device.
  53  *
  54  * Field names beginning with underscores are for the internal use of
  55  * the omap_device code.
  56  *
  57  */
  58 struct omap_device {
  59         struct platform_device          *pdev;
  60         struct omap_hwmod               **hwmods;
  61         unsigned long                   _driver_status;
  62         u8                              hwmods_cnt;
  63         u8                              _state;
  64         u8                              flags;
  65 };
  66
  67 /* Device driver interface (call via platform_data fn ptrs) */
  68
  69 int omap_device_enable(struct platform_device *pdev);
  70 int omap_device_idle(struct platform_device *pdev);
  71
  72 /* Core code interface */
  73
  74 struct platform_device *omap_device_build(const char *pdev_name, int pdev_id,
  75                                           struct omap_hwmod *oh, void *pdata,
  76                                           int pdata_len);
  77
  78 struct omap_device *omap_device_alloc(struct platform_device *pdev,
  79                                       struct omap_hwmod **ohs, int oh_cnt);
  80 void omap_device_delete(struct omap_device *od);
  81 int omap_device_register(struct platform_device *pdev);
  82
  83 struct device *omap_device_get_by_hwmod_name(const char *oh_name);
  84
  85 /* OMAP PM interface */
  86 int omap_device_get_context_loss_count(struct platform_device *pdev);
  87
  88 /* Other */
  89
  90 int omap_device_assert_hardreset(struct platform_device *pdev,
  91                                  const char *name);
  92 int omap_device_deassert_hardreset(struct platform_device *pdev,
  93                                  const char *name);
  94
  95 /* Get omap_device pointer from platform_device pointer */
  96 static inline struct omap_device *to_omap_device(struct platform_device *pdev)
  97 {
  98         return pdev ? pdev->archdata.od : NULL;
  99 }
 100 #endif