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These are brief instructions on how to add support for CF adapters to
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custom designed PXA boards. You need to set the parameters in the
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config file. This should work for most implementations especially if you
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follow the connections of the standard lubbock. Anyway just the block
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marked memory configuration should be touched since the other parameters
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are imposed by the PXA architecture.
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EDIT 2010-07-01: in common/cmd_ide.c, having CONFIG_PXA_PCMCIA defined
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would cause looping on inw()/outw() rather than using insw()/outsw(),
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thus making sure IDE / ATA bytes are properly swapped. This behaviour
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is now controlled by CONFIG_IDE_SWAP_IO, therefore PXA boards with
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PCMCIA should #define CONFIG_IDE_SWAP_IO.
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#define CONFIG_IDE_SWAP_IO
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#define CONFIG_PXA_PCMCIA 1
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#define CONFIG_PXA_IDE 1
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#define CONFIG_PCMCIA_SLOT_A 1
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/* just to keep build system happy */
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#define CONFIG_SYS_PCMCIA_MEM_ADDR 0x28000000
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#define CONFIG_SYS_PCMCIA_MEM_SIZE 0x10000000
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#define CONFIG_SYS_MECR_VAL 0x00000000
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#define CONFIG_SYS_MCMEM0_VAL 0x00004204
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#define CONFIG_SYS_MCMEM1_VAL 0x00000000
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#define CONFIG_SYS_MCATT0_VAL 0x00010504
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#define CONFIG_SYS_MCATT1_VAL 0x00000000
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#define CONFIG_SYS_MCIO0_VAL 0x00008407
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#define CONFIG_SYS_MCIO1_VAL 0x00000000
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/* memory configuration */
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#define CONFIG_SYS_IDE_MAXBUS 1
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/* max. 1 IDE bus */
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#define CONFIG_SYS_IDE_MAXDEVICE 1
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/* max. 1 drive per IDE bus */
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#define CONFIG_SYS_ATA_IDE0_OFFSET 0x0000
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#define CONFIG_SYS_ATA_BASE_ADDR 0x20000000
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/* Offset for data I/O */
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#define CONFIG_SYS_ATA_DATA_OFFSET 0x1f0
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/* Offset for normal register accesses */
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#define CONFIG_SYS_ATA_REG_OFFSET 0x1f0
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/* Offset for alternate registers */
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#define CONFIG_SYS_ATA_ALT_OFFSET 0x3f0
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Another important point is that maybe you have to power the pcmcia
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subsystem. This is very board specific, for an example on how to
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do it please search for CONFIG_EXADRON1 in cmd_pcmcia.c
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