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-rw-r--r--drivers/spi/cadence_qspi_apb.c22
1 files changed, 16 insertions, 6 deletions
diff --git a/drivers/spi/cadence_qspi_apb.c b/drivers/spi/cadence_qspi_apb.c
index 5d5b6f0d35..e02f2217f4 100644
--- a/drivers/spi/cadence_qspi_apb.c
+++ b/drivers/spi/cadence_qspi_apb.c
@@ -634,6 +634,8 @@ int cadence_qspi_apb_indirect_read_execute(struct cadence_spi_platdata *plat,
{
unsigned int remaining = n_rx;
unsigned int bytes_to_read = 0;
+ struct bounce_buffer bb;
+ u8 *bb_rxbuf;
int ret;
writel(n_rx, plat->regbase + CQSPI_REG_INDIRECTRDBYTES);
@@ -642,6 +644,11 @@ int cadence_qspi_apb_indirect_read_execute(struct cadence_spi_platdata *plat,
writel(CQSPI_REG_INDIRECTRD_START,
plat->regbase + CQSPI_REG_INDIRECTRD);
+ ret = bounce_buffer_start(&bb, (void *)rxbuf, n_rx, GEN_BB_WRITE);
+ if (ret)
+ return ret;
+ bb_rxbuf = bb.bounce_buffer;
+
while (remaining > 0) {
ret = cadence_qspi_wait_for_data(plat);
if (ret < 0) {
@@ -655,12 +662,13 @@ int cadence_qspi_apb_indirect_read_execute(struct cadence_spi_platdata *plat,
bytes_to_read *= CQSPI_FIFO_WIDTH;
bytes_to_read = bytes_to_read > remaining ?
remaining : bytes_to_read;
- /* Handle non-4-byte aligned access to avoid data abort. */
- if (((uintptr_t)rxbuf % 4) || (bytes_to_read % 4))
- readsb(plat->ahbbase, rxbuf, bytes_to_read);
- else
- readsl(plat->ahbbase, rxbuf, bytes_to_read >> 2);
- rxbuf += bytes_to_read;
+ readsl(plat->ahbbase, bb_rxbuf, bytes_to_read >> 2);
+ if (bytes_to_read % 4)
+ readsb(plat->ahbbase,
+ bb_rxbuf + rounddown(bytes_to_read, 4),
+ bytes_to_read % 4);
+
+ bb_rxbuf += bytes_to_read;
remaining -= bytes_to_read;
bytes_to_read = cadence_qspi_get_rd_sram_level(plat);
}
@@ -677,6 +685,7 @@ int cadence_qspi_apb_indirect_read_execute(struct cadence_spi_platdata *plat,
/* Clear indirect completion status */
writel(CQSPI_REG_INDIRECTRD_DONE,
plat->regbase + CQSPI_REG_INDIRECTRD);
+ bounce_buffer_stop(&bb);
return 0;
@@ -684,6 +693,7 @@ failrd:
/* Cancel the indirect read */
writel(CQSPI_REG_INDIRECTRD_CANCEL,
plat->regbase + CQSPI_REG_INDIRECTRD);
+ bounce_buffer_stop(&bb);
return ret;
}