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-The U-Boot Driver Model Project
-===============================
-PCMCIA analysis
-===============
-Viktor Krivak <viktor.krivak@gmail.com>
-2012-03-17
-
-I) Overview
------------
-
-  U-boot implements only 2 methods to interoperate with pcmcia. One to turn
-  device on and other to turn device off. Names of these methods are usually
-  pcmcia_on() and pcmcia_off() without any parameters. Some files in driver
-  directory implements only internal API. These methods aren't used outside
-  driver directory and they are not converted to new driver model.
-
-II) Approach
------------
-
-  1) New API
-  ----------
-
-    Current API is preserved and all internal methods are hiden.
-
-    struct ops {
-      void (*pcmcia_on)(struct instance *i);
-      void (*pcmcia_off)(struct instance *i);
-    }
-
-  2) Conversion
-  -------------
-
-    In header file pcmcia.h are some other variables which are used for
-    additional configuration. But all have to be moved to platform data or to
-    specific driver implementation.
-
-  3) Platform data
-  ----------------
-
-    Many boards have custom implementation of internal API. Pointers to these
-    methods are stored in platform_data. But the most implementations for Intel
-    82365 and compatible PC Card controllers and Yenta-compatible
-    PCI-to-CardBus controllers implement whole API per board. In these cases
-    pcmcia_on() and pcmcia_off() behave only as wrappers and call specific
-    board methods.
-
-III) Analysis of in-tree drivers
---------------------------------
-
-  i82365.c
-  --------
-    Driver methods have different name i82365_init() and i82365_exit but
-    all functionality is the same. Board files board/atc/ti113x.c and
-    board/cpc45/pd67290.c use their own implementation of these method.
-    In this case all methods in driver behave only as wrappers.
-
-  marubun_pcmcia.c
-  ----------------
-    Meets standard API behaviour. Simple conversion.
-
-  mpc8xx_pcmcia.c
-  ---------------
-    Meets standard API behaviour. Simple conversion.
-
-  rpx_pcmcia.c
-  ------------
-    Implements only internal API used in other drivers. Non of methods
-    implemented here are used outside driver model.
-
-  ti_pci1410a.c
-  -------------
-    Has different API but methods in this file are never called. Probably
-    dead code.
-
-  tqm8xx_pcmcia.c
-  ---------------
-    Implements only internal API used in other drivers. Non of methods
-    implemented here are used outside driver model.