Add support for the ENE Embedded Debug Interface EDI and KB9012 EC
The ENE Embedded Debug Interface (EDI) is a SPI-based interface for
accessing the memory of ENE embedded controllers.
The ENE KB9012 EC is an embedded controller found on various laptops
such as the Lenovo G505s. It features a 8051 microcontroller and
has 128 KiB of internal storage for program data.
EDI can be accessed on the KB9012 through pins 59-62 (CS-CLK-MOSI-MISO)
when flash direct access is not in use. Some firmwares disable EDI at runtime
so it might be necessary to ground pin 42 to reset the 8051 microcontroller
before accessing the KB9012 via EDI.
The example of flashing KB9012 at Lenovo G505S laptop could be found here:
http://dangerousprototypes.com/docs/Flashing_KB9012_with_Bus_Pirate
Change-Id: Ib8b2eb2feeef5c337d725d15ebf994a299897854
Signed-off-by: Mike Banon <mikebdp2@gmail.com>
Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Reviewed-on: https://review.coreboot.org/23259
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
diff --git a/chipdrivers.h b/chipdrivers.h
index 8405220..af59c30 100644
--- a/chipdrivers.h
+++ b/chipdrivers.h
@@ -199,4 +199,10 @@
int probe_en29lv640b(struct flashctx *flash);
int write_en29lv640b(struct flashctx *flash, const uint8_t *buf, unsigned int start, unsigned int len);
+/* edi.c */
+int edi_chip_block_erase(struct flashctx *flash, unsigned int page, unsigned int size);
+int edi_chip_write(struct flashctx *flash, const uint8_t *buf, unsigned int start, unsigned int len);
+int edi_chip_read(struct flashctx *flash, uint8_t *buf, unsigned int start, unsigned int len);
+int edi_probe_kb9012(struct flashctx *flash);
+
#endif /* !__CHIPDRIVERS_H__ */