sdm845: qspi: Add Dual SPI support

This patch adds support for the Dual SPI feature (SDR 2-bit in Qualcomm
terminology) to the QSPI controller.

Change-Id: I7aed2ccd9627f5de5dd760b418f74d56d2c031d3
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33284
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Julius Werner 2019-06-06 17:09:58 -07:00
parent 99e45ceb35
commit 127a55e91d
3 changed files with 17 additions and 4 deletions

View File

@ -116,4 +116,6 @@ int sdm845_setup_bus(const struct spi_slave *slave);
void sdm845_release_bus(const struct spi_slave *slave);
int sdm845_xfer(const struct spi_slave *slave, const void *dout,
size_t out_bytes, void *din, size_t in_bytes);
int sdm845_xfer_dual(const struct spi_slave *slave, const void *dout,
size_t out_bytes, void *din, size_t in_bytes);
#endif /* __SOC_QUALCOMM_SDM845_QSPI_H__ */

View File

@ -277,11 +277,9 @@ void sdm845_release_bus(const struct spi_slave *slave)
cs_change(CS_DEASSERT);
}
int sdm845_xfer(const struct spi_slave *slave, const void *dout,
size_t out_bytes, void *din, size_t in_bytes)
static int xfer(enum qspi_mode mode, const void *dout, size_t out_bytes,
void *din, size_t in_bytes)
{
enum qspi_mode mode = SDR_1BIT;
if ((out_bytes && !dout) || (in_bytes && !din) ||
(in_bytes && out_bytes)) {
return -1;
@ -294,3 +292,15 @@ int sdm845_xfer(const struct spi_slave *slave, const void *dout,
return 0;
}
int sdm845_xfer(const struct spi_slave *slave, const void *dout,
size_t out_bytes, void *din, size_t in_bytes)
{
return xfer(SDR_1BIT, dout, out_bytes, din, in_bytes);
}
int sdm845_xfer_dual(const struct spi_slave *slave, const void *dout,
size_t out_bytes, void *din, size_t in_bytes)
{
return xfer(SDR_2BIT, dout, out_bytes, din, in_bytes);
}

View File

@ -21,6 +21,7 @@ static const struct spi_ctrlr spi_ctrlr = {
.claim_bus = sdm845_claim_bus,
.release_bus = sdm845_release_bus,
.xfer = sdm845_xfer,
.xfer_dual = sdm845_xfer_dual,
.max_xfer_size = QSPI_MAX_PACKET_COUNT,
};