diff options
| author | Jan Dąbroś <jsd@semihalf.com> | 2016-03-09 09:14:32 +0100 |
|---|---|---|
| committer | Leif Lindholm <leif.lindholm@linaro.org> | 2016-07-11 18:23:57 +0100 |
| commit | ed1de1a7d0961ebe996102a2f2f41ebfedcd0d4f (patch) | |
| tree | c4c0307aec2ebef635800bb590f1a58edf4ebd20 /Documentation | |
| parent | 7e19f5e7a36584493547382c0ad20e3658016d9d (diff) | |
Platforms/Marvell: Create MppLib
- Create Mpp Library, which allows to set MPP on board.
- Create Platforms/Marvell/Marvell.dec file, which holds PCDs' declaration.
- Export configuration capabilities via PCDs.
- Prepare porting guide document
Because GetMppPcd has to be adjusted to possible 8 MPP registers,
although unused, additional PcdChip<X>MppSel are added in order to
satisfy preprocessor demands. For the same reason there are MPP
PCDs for all of 4 possible chips.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jan Dabros <jsd@semihalf.com>
Signed-off-by: Marcin Wojtas <mw@semihalf.com>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/Marvell/PortingGuide/Mpp.txt | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/Documentation/Marvell/PortingGuide/Mpp.txt b/Documentation/Marvell/PortingGuide/Mpp.txt new file mode 100644 index 0000000..3e36b5f --- /dev/null +++ b/Documentation/Marvell/PortingGuide/Mpp.txt @@ -0,0 +1,48 @@ +MPP configuration
+-----------------
+Multi-Purpose Ports (MPP) are configurable through platform PCDs.
+In order to set desired pin multiplexing, .dsc file needs to be modified.
+(OpenPlatformPkg/Platforms/Marvell/Armada/{platform_name}.dsc - please refer to
+Documentation/Build.txt for currently supported {platftorm_name} )
+Following PCDs are available:
+
+ gMarvellTokenSpaceGuid.PcdMppChipCount
+
+Indicates how many different chips are placed on board. So far up to 4 chips
+are supported.
+
+Every MPP PCD has <Num> part where
+ <Num> stands for chip ID (order is not important, but configuration will be
+ set for first PcdMppChipCount chips).
+
+Below is example for the first chip (Chip0).
+
+ gMarvellTokenSpaceGuid.PcdChip0MppReverseFlag
+
+Indicates that register order is reversed. (Needs to be used only for AP806-Z1)
+
+ gMarvellTokenSpaceGuid.PcdChip0MppBaseAddress
+
+This is base address for MPP configuration register.
+
+ gMarvellTokenSpaceGuid.PcdChip0MppPinCount
+
+Defines how many MPP pins are available.
+
+ gMarvellTokenSpaceGuid.PcdChip0MppSel0
+ gMarvellTokenSpaceGuid.PcdChip0MppSel1
+ gMarvellTokenSpaceGuid.PcdChip0MppSel2
+
+This registers defines functions of 10 pins in ascending order.
+
+Examples
+--------
+#APN806-A0 MPP SET
+ gMarvellTokenSpaceGuid.PcdChip0MppReverseFlag|FALSE
+ gMarvellTokenSpaceGuid.PcdChip0MppBaseAddress|0xF06F4000
+ gMarvellTokenSpaceGuid.PcdChip0MppRegCount|3
+ gMarvellTokenSpaceGuid.PcdChip0MppSel0|{ 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x0 }
+ gMarvellTokenSpaceGuid.PcdChip0MppSel1|{ 0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 }
+
+Set pin 6 and 7 to 0xa function:
+ gMarvellTokenSpaceGuid.PcdChip0MppSel0|{ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xa, 0xa, 0x0, 0x0 }
|