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History

Paul Mackerras 21ed730514 arty_a7: Add litesdcard interface This adds litesdcard.v generated from the litex/litesdcard project, along with logic in top-arty.vhdl to connect it into the system. There is now a DMA wishbone coming in to soc.vhdl which is narrower than the other wishbone masters (it has 32-bit data rather than 64-bit) so there is a widening/narrowing adapter between it and the main wishbone master arbiter. Also, litesdcard generates a non-pipelined wishbone for its DMA connection, which needs to be converted to a pipelined wishbone. We have a latch on both the incoming and outgoing sides of the wishbone in order to help make timing (at the cost of two extra cycles of latency). litesdcard generates an interrupt signal which is wired up to input 3 of the ICS (IRQ 19). Signed-off-by: Paul Mackerras <paulus@ozlabs.org>	4 years ago
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arty	arty_a7: Add litesdcard interface	4 years ago

Paul Mackerras 21ed730514 arty_a7: Add litesdcard interface

This adds litesdcard.v generated from the litex/litesdcard project,
along with logic in top-arty.vhdl to connect it into the system.
There is now a DMA wishbone coming in to soc.vhdl which is narrower
than the other wishbone masters (it has 32-bit data rather than
64-bit) so there is a widening/narrowing adapter between it and the
main wishbone master arbiter.

Also, litesdcard generates a non-pipelined wishbone for its DMA
connection, which needs to be converted to a pipelined wishbone.  We
have a latch on both the incoming and outgoing sides of the wishbone
in order to help make timing (at the cost of two extra cycles of
latency).

litesdcard generates an interrupt signal which is wired up to input 3
of the ICS (IRQ 19).

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>

arty

arty_a7: Add litesdcard interface