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Add EM100 'hyper term' spi console support in ramstage & smm

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The EM100Pro allows the debug console to be sent over the SPI bus.
This is not yet working in romstage due to the use of static variables
in the SPI driver code.  It is also not working on chipsets that have
SPI write buffers of less than 10 characters due to the 9 byte
command/header length specified by the EM100 protocol.

While this currently works only with the EM100, it seems like it would
be useful on any logic analyzer with SPI debug - just filter on command
bytes of 0x11.

Change-Id: Icd42ccd96cab0a10a4e70f4b02ecf9de8169564b
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: http://review.coreboot.org/11743
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Martin Roth 2015-09-28 15:27:24 -06:00
commit 3a54318856
12 changed files with 169 additions and 0 deletions
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3
src/console/console.c
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@ -24,6 +24,7 @@
#include <console/streams.h>
#include <console/uart.h>
#include <console/usb.h>
#include <console/spi.h>
#include <rules.h>
void console_hw_init(void)
@ -35,6 +36,7 @@ void console_hw_init(void)
__uart_init();
__ne2k_init();
__usbdebug_init();
__spiconsole_init();
}
void console_tx_byte(unsigned char byte)
@ -54,6 +56,7 @@ void console_tx_byte(unsigned char byte)
__uart_tx_byte(byte);
__ne2k_tx_byte(byte);
__usb_tx_byte(byte);
__spiconsole_tx_byte(byte);
}
void console_tx_flush(void)