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-rw-r--r--src/southbridge/amd/Kconfig9
-rw-r--r--src/southbridge/amd/agesa/hudson/spi.c15
-rw-r--r--src/southbridge/amd/cimx/sb800/spi.c14
3 files changed, 29 insertions, 9 deletions
diff --git a/src/southbridge/amd/Kconfig b/src/southbridge/amd/Kconfig
index 39aeb09455..867afcaf8b 100644
--- a/src/southbridge/amd/Kconfig
+++ b/src/southbridge/amd/Kconfig
@@ -14,12 +14,3 @@ source src/southbridge/amd/sb800/Kconfig
source src/southbridge/amd/cimx/Kconfig
source src/southbridge/amd/agesa/Kconfig
source src/southbridge/amd/sr5650/Kconfig
-
-if CPU_AMD_AGESA
-
-config AMD_SB_SPI_TX_LEN
- int
- default 4
- depends on SPI_FLASH
-
-endif
diff --git a/src/southbridge/amd/agesa/hudson/spi.c b/src/southbridge/amd/agesa/hudson/spi.c
index f050a63f91..2aeb2c04c0 100644
--- a/src/southbridge/amd/agesa/hudson/spi.c
+++ b/src/southbridge/amd/agesa/hudson/spi.c
@@ -20,6 +20,7 @@
#include <stdlib.h>
#include <string.h>
#include <arch/io.h>
+#include <console/console.h>
#include <spi-generic.h>
#include <device/device.h>
#include <device/pci.h>
@@ -101,6 +102,20 @@ int spi_xfer(struct spi_slave *slave, const void *dout,
u8 count;
bytesout--;
+
+ /*
+ * Check if this is a write command attempting to transfer more bytes
+ * than the controller can handle. Iterations for writes are not
+ * supported here because each SPI write command needs to be preceded
+ * and followed by other SPI commands, and this sequence is controlled
+ * by the SPI chip driver.
+ */
+ if (bytesout > AMD_SB_SPI_TX_LEN) {
+ printk(BIOS_DEBUG, "FCH SPI: Too much to write. Does your SPI chip driver use"
+ " spi_crop_chunk()?\n");
+ return -1;
+ }
+
readoffby1 = bytesout ? 0 : 1;
#if CONFIG_SOUTHBRIDGE_AMD_AGESA_YANGTZE
diff --git a/src/southbridge/amd/cimx/sb800/spi.c b/src/southbridge/amd/cimx/sb800/spi.c
index e5b2407082..f38e691254 100644
--- a/src/southbridge/amd/cimx/sb800/spi.c
+++ b/src/southbridge/amd/cimx/sb800/spi.c
@@ -20,6 +20,7 @@
#include <stdlib.h>
#include <string.h>
#include <arch/io.h>
+#include <console/console.h>
#include <spi-generic.h>
#include <device/device.h>
#include <device/pci.h>
@@ -74,6 +75,19 @@ int spi_xfer(struct spi_slave *slave, const void *dout,
bytesout--;
+ /*
+ * Check if this is a write command attempting to transfer more bytes
+ * than the controller can handle. Iterations for writes are not
+ * supported here because each SPI write command needs to be preceded
+ * and followed by other SPI commands, and this sequence is controlled
+ * by the SPI chip driver.
+ */
+ if (bytesout > AMD_SB_SPI_TX_LEN) {
+ printk(BIOS_DEBUG, "FCH SPI: Too much to write. Does your SPI chip driver use"
+ " spi_crop_chunk()?\n");
+ return -1;
+ }
+
readoffby1 = bytesout ? 0 : 1;
readwrite = (bytesin + readoffby1) << 4 | bytesout;