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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/amd
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/amd')
-rw-r--r--src/southbridge/amd/agesa/hudson/spi.c7
-rw-r--r--src/southbridge/amd/cimx/sb800/spi.c7
-rw-r--r--src/southbridge/amd/sb700/spi.c7
3 files changed, 6 insertions, 15 deletions
diff --git a/src/southbridge/amd/agesa/hudson/spi.c b/src/southbridge/amd/agesa/hudson/spi.c
index 00f6b29303..1afe3e0ded 100644
--- a/src/southbridge/amd/agesa/hudson/spi.c
+++ b/src/southbridge/amd/agesa/hudson/spi.c
@@ -85,11 +85,6 @@ void spi_init(void)
spibar = pci_read_config32(dev, 0xA0) & ~0x1F;
}
-unsigned int spi_crop_chunk(unsigned int cmd_len, unsigned int buf_len)
-{
- return min(AMD_SB_SPI_TX_LEN - cmd_len, buf_len);
-}
-
static int spi_ctrlr_xfer(const struct spi_slave *slave, const void *dout,
size_t bytesout, void *din, size_t bytesin)
{
@@ -168,6 +163,8 @@ int chipset_volatile_group_end(const struct spi_flash *flash)
static const struct spi_ctrlr spi_ctrlr = {
.xfer = spi_ctrlr_xfer,
.xfer_vector = spi_xfer_two_vectors,
+ .max_xfer_size = AMD_SB_SPI_TX_LEN,
+ .deduct_cmd_len = true,
};
int spi_setup_slave(unsigned int bus, unsigned int cs, struct spi_slave *slave)
diff --git a/src/southbridge/amd/cimx/sb800/spi.c b/src/southbridge/amd/cimx/sb800/spi.c
index 1e847439f9..a6649251d1 100644
--- a/src/southbridge/amd/cimx/sb800/spi.c
+++ b/src/southbridge/amd/cimx/sb800/spi.c
@@ -54,11 +54,6 @@ void spi_init()
spibar = pci_read_config32(dev, 0xA0) & ~0x1F;
}
-unsigned int spi_crop_chunk(unsigned int cmd_len, unsigned int buf_len)
-{
- return min(AMD_SB_SPI_TX_LEN - cmd_len, buf_len);
-}
-
static int spi_ctrlr_xfer(const struct spi_slave *slave, const void *dout,
size_t bytesout, void *din, size_t bytesin)
{
@@ -159,6 +154,8 @@ int chipset_volatile_group_end(const struct spi_flash *flash)
static const struct spi_ctrlr spi_ctrlr = {
.xfer = spi_ctrlr_xfer,
.xfer_vector = spi_xfer_two_vectors,
+ .max_xfer_size = AMD_SB_SPI_TX_LEN,
+ .deduct_cmd_len = true,
};
int spi_setup_slave(unsigned int bus, unsigned int cs, struct spi_slave *slave)
diff --git a/src/southbridge/amd/sb700/spi.c b/src/southbridge/amd/sb700/spi.c
index 5d56415b44..9731896803 100644
--- a/src/southbridge/amd/sb700/spi.c
+++ b/src/southbridge/amd/sb700/spi.c
@@ -40,11 +40,6 @@ void spi_init(void)
/* Not needed */
}
-unsigned int spi_crop_chunk(unsigned int cmd_len, unsigned int buf_len)
-{
- return min(AMD_SB_SPI_TX_LEN - cmd_len, buf_len);
-}
-
static void reset_internal_fifo_pointer(void)
{
uint32_t spibar = get_spi_bar();
@@ -121,6 +116,8 @@ 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 = AMD_SB_SPI_TX_LEN,
+ .deduct_cmd_len = true,
};
int spi_setup_slave(unsigned int bus, unsigned int cs, struct spi_slave *slave)