There are various reasons why a SPI command can fail
Among others, I have seen the following problems: - The SPI opcode is
not supported by the controller. ICH-style controllers exhibit this if
SPI config is locked down. - The address in in a prohibited area. This
can happen on ICH for any access (BBAR) and for writes in chipset write
protected areas. - There is no SPI controller.
Introduce separate error codes for unsupported opcode and prohibited
address.
Add the ability to adjust REMS and RES addresses to the minium supported
read address with the help of spi_get_valid_read_addr(). That function
needs to call SPI controller specific functions like reading BBAR on
ICH.
Corresponding to flashrom svn r500.
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
diff --git a/flash.h b/flash.h
index a843b9d..bf52a56 100644
--- a/flash.h
+++ b/flash.h
@@ -654,6 +654,7 @@
void spi_byte_program(int address, uint8_t byte);
int spi_nbyte_read(int address, uint8_t *bytes, int len);
int spi_aai_write(struct flashchip *flash, uint8_t *buf);
+uint32_t spi_get_valid_read_addr(void);
/* 82802ab.c */
int probe_82802ab(struct flashchip *flash);