drivers/spi: Re-factor spi_crop_chunk
spi_crop_chunk is a property of the SPI controller since it depends
upon the maximum transfer size that is supported by the
controller. Also, it is possible to implement this within spi-generic
layer by obtaining following parameters from the controller:
1. max_xfer_size: Maximum transfer size supported by the controller
(Size of 0 indicates invalid size, and unlimited transfer size is
indicated by UINT32_MAX.)
2. deduct_cmd_len: Whether cmd_len needs to be deducted from the
max_xfer_size to determine max data size that can be
transferred. (This is used by the amd boards.)
Change-Id: I81c199413f879c664682088e93bfa3f91c6a46e5
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/19386
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Tested-by: coreboot org <coreboot.org@gmail.com>
diff --git a/src/southbridge/intel/common/spi.c b/src/southbridge/intel/common/spi.c
index ee94937..11318f7 100644
--- a/src/southbridge/intel/common/spi.c
+++ b/src/southbridge/intel/common/spi.c
@@ -19,6 +19,7 @@
#include <stdlib.h>
#include <string.h>
#include <bootstate.h>
+#include <commonlib/helpers.h>
#include <delay.h>
#include <arch/io.h>
#include <console/console.h>
@@ -504,11 +505,6 @@
return !!((cntlr.flmap0 >> 8) & 3);
}
-unsigned int spi_crop_chunk(unsigned int cmd_len, unsigned int buf_len)
-{
- return min(cntlr.databytes, buf_len);
-}
-
static int spi_ctrlr_xfer(const struct spi_slave *slave, const void *dout,
size_t bytesout, void *din, size_t bytesin)
{
@@ -660,6 +656,7 @@
static const struct spi_ctrlr spi_ctrlr = {
.xfer = spi_ctrlr_xfer,
.xfer_vector = spi_xfer_two_vectors,
+ .max_xfer_size = member_size(ich9_spi_regs, fdata),
};
int spi_setup_slave(unsigned int bus, unsigned int cs, struct spi_slave *slave)