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Every SPI host controller implemented its own way to read flash chips

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This was partly due to a design problem in the abstraction layer.

There should be exactly two different functions for reading SPI chips:
- memory mapped reads
- SPI command reads.

Each of them should be contained in a separate function, optionally
taking parameters where needed.

This patch solves the problems mentioned above, shortens the code and
makes the code logic a lot more obvious.

Since open-coding the min() function leads to errors, include it in this
patch as well.

Corresponding to flashrom svn r589.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Ronald G. Minnich <rminnich@gmail.com>
This commit is contained in:
Carl-Daniel Hailfinger
2009-06-13 12:04:03 +00:00
parent 8b2f46b878
commit 38a059d6ef
7 changed files with 42 additions and 63 deletions
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4
wbsio_spi.c
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@ -177,12 +177,12 @@ int wbsio_spi_read(struct flashchip *flash, uint8_t *buf)
{
int size = flash->total_size * 1024;
if (flash->total_size > 1024) {
if (size > 1024 * 1024) {
fprintf(stderr, "%s: Winbond saved on 4 register bits so max chip size is 1024 KB!\n", __func__);
return 1;
}
memcpy(buf, (const char *)flash->virtual_memory, size);
read_memmapped(flash, buf);
return 0;
}