1. 05 Feb, 2008 1 commit
    • Carlos Corbacho's avatar
      ACPI: WMI: Add ACPI-WMI mapping driver · bff431e4
      Carlos Corbacho authored
      The following is an implementation of the Windows Management
      Instrumentation (WMI) ACPI interface mapper (PNP0C14).
      
      What it does:
      
      Parses the _WDG method and exports functions to process WMI method calls,
      data block query/ set commands (both based on GUID) and does basic event
      handling.
      
      How: WMI presents an in kernel interface here (essentially, a minimal
      wrapper around ACPI)
      
      (const char *guid assume the 36 character ASCII representation of
      a GUID - e.g. 67C3371D-95A3-4C37-BB61-DD47B491DAAB)
      
      wmi_evaluate_method(const char *guid, u8 instance, u32 method_id,
      const struct acpi_buffer *in, struct acpi_buffer *out)
      
      wmi_query_block(const char *guid, u8 instance,
      struct acpi_buffer *out)
      
      wmi_set_block(const char *guid, u38 instance,
      const struct acpi_buffer *in)
      
      wmi_install_notify_handler(acpi_notify_handler handler);
      
      wmi_remove_notify_handler(void);
      
      wmi_get_event_data(u32 event, struct acpi_buffer *out)
      
      wmi_has_guid(const char guid*)
      
      wmi_has_guid() is a helper function to find if a GUID exists or not on the
      system (a quick and easy way for WMI dependant drivers to see if the
      the method/ block they want exists, since GUIDs are supposed to be unique).
      
      Event handling - allow a WMI based driver to register a notifier handler
      for each GUID with WMI. When a notification is sent to a GUID in WMI, the
      handler registered with WMI is then called (it is left to the caller to
      ask for the WMI event data associated with the GUID, if needed).
      
      What it won't do:
      
      Unicode - The MS article[1] calls for converting between ASCII and Unicode (or
      vice versa) if a GUID is marked as "string". This is left up to the calling
      driver.
      
      Handle a MOF[1] - the WMI mapper just exports methods, data and events to
      userspace. MOF handling is down to userspace.
      
      Userspace interface - this will be added later.
      
      [1] http://www.microsoft.com/whdc/system/pnppwr/wmi/wmi-acpi.mspx
      
      ===
      ChangeLog
      ==
      
      v1 (2007-10-02):
      
      * Initial release
      
      v2 (2007-10-05):
      
      * Cleaned up code - split up super "wmi_evaluate_block" -> each external
        symbol now handles its own ACPI calls, rather than handing off to
        a "super" method (and in turn, is a lot simpler to read)
      * Added a find_guid() symbol - return true if a given GUID exists on
        the system
      * wmi_* functions now return type acpi_status (since they are just
        fancy wrappers around acpi_evaluate_object())
      * Removed extra debug code
      
      v3 (2007-10-27)
      
      * More code clean up - now passes checkpatch.pl
      * Change data block calls - ref MS spec, method ID is not required for
        them, so drop it from the function parameters.
      * Const'ify guid in the function call parameters.
      * Fix _WDG buffer handling - copy the data to our own private structure.
      * Change WMI from tristate to bool - otherwise the external functions are
        not exported in linux/acpi.h if you try to build WMI as a module.
      * Fix more flag comparisons.
      * Add a maintainers entry - since I wrote this, I should take the blame
        for it.
      
      v4 (2007-10-30)
      
      * Add missing brace from after fixing checkpatch errors.
      * Rewrote event handling - allow external drivers to register with WMI to
        handle WMI events
      * Clean up flags and sanitise flag handling
      
      v5 (2007-11-03)
      
      * Add sysfs interface for userspace. Export events over netlink again.
      * Remove module left overs, fully convert to built-in driver.
      * Tweak in-kernel API to use u8 for instance, since this is what the GUID
        blocks use (so instance cannot be greater than u8).
      * Export wmi_get_event_data() for in kernel WMI drivers.
      
      v6 (2007-11-07)
      
      * Split out userspace into a different patch
      
      v7 (2007-11-20)
      
      * Fix driver to handle multiple PNP0C14 devices - store all GUIDs using
        the kernel's built in list functions, and just keep adding to the list
        every time we handle a PNP0C14 devices - GUIDs will always be unique,
        and WMI callers do not know or care about different devices.
      * Change WMI event handler registration to use its' own event handling
        struct; we should not pass an acpi_handle down to any WMI based drivers
        - they should be able to function with only the calls provided in WMI.
      * Update my e-mail address
      
      v8 (2007-11-28)
      
      * Convert back to a module.
      * Update Kconfig to default to building as a module.
      * Remove an erroneous printk.
      * Simply comments for string flag (since we now leave the handling to the
        caller).
      
      v9 (2007-12-07)
      
      * Add back missing MODULE_DEVICE_TABLE for autoloading
      * Checkpatch fixes
      
      v10 (2007-12-12)
      
      * Workaround broken GUIDs declared expensive without a WCxx method.
      * Minor cleanups
      
      v11 (2007-12-17)
      
      * More fixing for broken GUIDs declared expensive without a WCxx method.
      * Add basic EmbeddedControl region handling.
      
      v12 (2007-12-18)
      
      * Changed EC region handling code, as per Alexey's comments.
      
      v13 (2007-12-27)
      
      * Changed event handling so that we can have one event handler registered
        per GUID, as per Matthew Garrett's suggestion.
      
      v14 (2008-01-12)
      
      * Remove ACPI debug statements
      
      v15 (2008-02-01)
      
      * Replace two remaining 'x == NULL' type tests with '!x'
      
      v16 (2008-02-05)
      
      * Change MAINTAINERS entry, as I am not, and never have been, paid to work
        on WMI
      * Remove 'default' line from Kconfig
      Signed-off-by: default avatarCarlos Corbacho <carlos@strangeworlds.co.uk>
      CC: Matthew Garrett <mjg59@srcf.ucam.org>
      CC: Alexey Starikovskiy <aystarik@gmail.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      bff431e4
  2. 19 Nov, 2007 1 commit
  3. 27 Sep, 2007 1 commit
  4. 25 Mar, 2007 1 commit
  5. 21 Mar, 2007 1 commit
  6. 09 Mar, 2007 1 commit
  7. 16 Feb, 2007 1 commit
  8. 13 Feb, 2007 2 commits
  9. 02 Feb, 2007 1 commit
  10. 26 Jan, 2007 1 commit
  11. 15 Dec, 2006 1 commit
  12. 09 Jul, 2006 2 commits
  13. 01 Jul, 2006 1 commit
  14. 28 Jun, 2006 1 commit
  15. 30 Nov, 2005 1 commit
  16. 25 Aug, 2005 1 commit
  17. 24 Aug, 2005 3 commits
  18. 11 Jul, 2005 2 commits
  19. 16 Apr, 2005 1 commit
    • Linus Torvalds's avatar
      Linux-2.6.12-rc2 · 1da177e4
      Linus Torvalds authored
      Initial git repository build. I'm not bothering with the full history,
      even though we have it. We can create a separate "historical" git
      archive of that later if we want to, and in the meantime it's about
      3.2GB when imported into git - space that would just make the early
      git days unnecessarily complicated, when we don't have a lot of good
      infrastructure for it.
      
      Let it rip!
      1da177e4