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authorFurquan Shaikh <furquan@chromium.org>2017-04-19 19:27:28 -0700
committerMartin Roth <martinroth@google.com>2017-05-05 23:42:19 +0200
commitde705fa1f470683b9ea4ad91c1a9ae5a98942612 (patch)
tree60873b2b6772bf459cd8db2f171ae7711d507b02 /src/southbridge/intel/common
parentf1db5fdb4d03b4766cf23e4b04a05b0fc05586a0 (diff)
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>
Diffstat (limited to 'src/southbridge/intel/common')
-rw-r--r--src/southbridge/intel/common/spi.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/src/southbridge/intel/common/spi.c b/src/southbridge/intel/common/spi.c
index ee94937291..11318f7ec0 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 @@ static int spi_is_multichip (void)
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 int spi_ctrlr_xfer(const struct spi_slave *slave, const void *dout,
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)