diff options
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/cadence_qspi_apb.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/drivers/spi/cadence_qspi_apb.c b/drivers/spi/cadence_qspi_apb.c index 5d5b6f0..e02f221 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; } |