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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
parent f35f5ff3cd
commit 3a54318856
12 changed files with 169 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
src/console/Kconfig
View File

@ -211,6 +211,14 @@ config CONSOLE_QEMU_DEBUGCON_PORT
depends on CONSOLE_QEMU_DEBUGCON
default 0x402
config SPI_CONSOLE
bool "SPI debug console output"
depends on HAVE_SPI_CONSOLE_SUPPORT && !DEBUG_SPI_FLASH
help
Enable support for the debug console on the Dediprog EM100Pro.
This is currently working only in ramstage due to how the spi
drivers are written.
choice
prompt "Default console log level"
default DEFAULT_CONSOLE_LOGLEVEL_8

3
src/console/console.c
View File

@ -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)