Chips like the SST SST25VF080B can only handle single byte writes outside AAI mode
Change SPI architecture to handle 1-byte chunk chip writing differently
from 256-byte chunk chip writing.
Annotate SPI chip write functions with _256 or _1 suffix denoting the
number of bytes they write at maximum.
The 1-byte chunk writing is cut-n-pasted to different SPI drivers right
now. A later patch can move them to the generic spi_chip_write_1.
Corresponding to flashrom svn r485.
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
diff --git a/it87spi.c b/it87spi.c
index d7f1833..c2f42ed 100644
--- a/it87spi.c
+++ b/it87spi.c
@@ -219,10 +219,12 @@
}
/*
- * IT8716F only allows maximum of 512 kb SPI mapped to LPC memory cycles
* Program chip using firmware cycle byte programming. (SLOW!)
+ * This is for chips which can only handle one byte writes
+ * and for chips where memory mapped programming is impossible due to
+ * size constraints in IT87* (over 512 kB)
*/
-int it8716f_over512k_spi_chip_write(struct flashchip *flash, uint8_t *buf)
+int it8716f_spi_chip_write_1(struct flashchip *flash, uint8_t *buf)
{
int total_size = 1024 * flash->total_size;
int i;
@@ -269,13 +271,17 @@
return 0;
}
-int it8716f_spi_chip_write(struct flashchip *flash, uint8_t *buf)
+int it8716f_spi_chip_write_256(struct flashchip *flash, uint8_t *buf)
{
int total_size = 1024 * flash->total_size;
int i;
+ /*
+ * IT8716F only allows maximum of 512 kb SPI chip size for memory
+ * mapped access.
+ */
if (total_size > 512 * 1024) {
- it8716f_over512k_spi_chip_write(flash, buf);
+ it8716f_spi_chip_write_1(flash, buf);
} else {
for (i = 0; i < total_size / 256; i++) {
it8716f_spi_page_program(i, buf,