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aspeed/smc: Inject errors in DMA checksum

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Emulate read errors in the DMA Checksum Register for high frequencies
and optimistic settings of the Read Timing Compensation Register. This
will help in tuning the SPI timing calibration algorithm. Errors are
only injected when the property "inject_failure" is set to true as
suggested by Philippe.

The values below are those to expect from the first flash device of
the FMC controller of a palmetto-bmc machine.

Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Message-id: 20190904070506.1052-8-clg@kaod.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Cédric Le Goater 2019-09-04 09:05:03 +02:00 • committed by Peter Maydell
parent 0d72c71702
commit 5258c2a69c
2 changed files with 37 additions and 0 deletions
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1
include/hw/ssi/aspeed_smc.h
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@ -88,6 +88,7 @@ typedef struct AspeedSMCState {
uint32_t num_cs;
qemu_irq *cs_lines;
bool inject_failure;
SSIBus *spi;