From 80e647158800d927c776d1278d8817f0ed8f17cd Mon Sep 17 00:00:00 2001 From: Alexandre Boeglin Date: Sat, 20 Dec 2014 20:25:19 +0000 Subject: Add support for the MSTAR I2C ISP protocol Basically, among other chips, MSTAR manufactures SoCs that equip TV sets and computer screens, and it seems that all of their products use the same in-system programming protocol. Basically, they use the DDC channel of VGA or DVI connectors, which is actually an I2C bus, to encapsulate SPI frames (the flash chip is connected to the SoC through an SPI bus). I wrote this patch since the screen I bought had a software bug, and the manufacturer only released a new firmware binary, but no tool or instructions on flashing it. More details can be found here: http://boeglin.org/blog/index.php?entry=Flashing-a-BenQ-Z-series-for-free(dom) I only read code from Linux kernel archives published by Acer to figure out the protocol (for a touchscreen controller and an NFC chip, both by MSTAR, that share the same ISP protocol), so I don't think there are any legal problems with it. Compilation is currently disabled by default in the Makefile. If in doubt, additional Makefile bugs were added by Stefan. Corresponding to flashrom svn r1860. Signed-off-by: Alexandre Boeglin Signed-off-by: Stefan Tauner Acked-by: Stefan Tauner --- flashrom.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'flashrom.c') diff --git a/flashrom.c b/flashrom.c index 27bc36ab..104ecb85 100644 --- a/flashrom.c +++ b/flashrom.c @@ -354,6 +354,18 @@ const struct programmer_entry programmer_table[] = { }, #endif +#if CONFIG_MSTARDDC_SPI == 1 + { + .name = "mstarddc_spi", + .type = OTHER, + .devs.note = "MSTAR DDC devices addressable via /dev/i2c-* on Linux.\n", + .init = mstarddc_spi_init, + .map_flash_region = fallback_map, + .unmap_flash_region = fallback_unmap, + .delay = internal_delay, + }, +#endif + {0}, /* This entry corresponds to PROGRAMMER_INVALID. */ }; -- cgit v1.2.3