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path: root/drivers/spi/atmel_spi.c
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Diffstat (limited to 'drivers/spi/atmel_spi.c')
-rw-r--r--drivers/spi/atmel_spi.c17
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/spi/atmel_spi.c b/drivers/spi/atmel_spi.c
index 0c7165660853..95190c619c10 100644
--- a/drivers/spi/atmel_spi.c
+++ b/drivers/spi/atmel_spi.c
@@ -184,7 +184,8 @@ static void atmel_spi_next_xfer(struct spi_master *master,
{
struct atmel_spi *as = spi_master_get_devdata(master);
struct spi_transfer *xfer;
- u32 len, remaining, total;
+ u32 len, remaining;
+ u32 ieval;
dma_addr_t tx_dma, rx_dma;
if (!as->current_transfer)
@@ -197,6 +198,8 @@ static void atmel_spi_next_xfer(struct spi_master *master,
xfer = NULL;
if (xfer) {
+ spi_writel(as, PTCR, SPI_BIT(RXTDIS) | SPI_BIT(TXTDIS));
+
len = xfer->len;
atmel_spi_next_xfer_data(master, xfer, &tx_dma, &rx_dma, &len);
remaining = xfer->len - len;
@@ -234,6 +237,8 @@ static void atmel_spi_next_xfer(struct spi_master *master,
as->next_transfer = xfer;
if (xfer) {
+ u32 total;
+
total = len;
atmel_spi_next_xfer_data(master, xfer, &tx_dma, &rx_dma, &len);
as->next_remaining_bytes = total - len;
@@ -250,9 +255,11 @@ static void atmel_spi_next_xfer(struct spi_master *master,
" next xfer %p: len %u tx %p/%08x rx %p/%08x\n",
xfer, xfer->len, xfer->tx_buf, xfer->tx_dma,
xfer->rx_buf, xfer->rx_dma);
+ ieval = SPI_BIT(ENDRX) | SPI_BIT(OVRES);
} else {
spi_writel(as, RNCR, 0);
spi_writel(as, TNCR, 0);
+ ieval = SPI_BIT(RXBUFF) | SPI_BIT(ENDRX) | SPI_BIT(OVRES);
}
/* REVISIT: We're waiting for ENDRX before we start the next
@@ -265,7 +272,7 @@ static void atmel_spi_next_xfer(struct spi_master *master,
*
* It should be doable, though. Just not now...
*/
- spi_writel(as, IER, SPI_BIT(ENDRX) | SPI_BIT(OVRES));
+ spi_writel(as, IER, ieval);
spi_writel(as, PTCR, SPI_BIT(TXTEN) | SPI_BIT(RXTEN));
}
@@ -396,7 +403,7 @@ atmel_spi_interrupt(int irq, void *dev_id)
ret = IRQ_HANDLED;
- spi_writel(as, IDR, (SPI_BIT(ENDTX) | SPI_BIT(ENDRX)
+ spi_writel(as, IDR, (SPI_BIT(RXBUFF) | SPI_BIT(ENDRX)
| SPI_BIT(OVRES)));
/*
@@ -418,7 +425,7 @@ atmel_spi_interrupt(int irq, void *dev_id)
if (xfer->delay_usecs)
udelay(xfer->delay_usecs);
- dev_warn(master->dev.parent, "fifo overrun (%u/%u remaining)\n",
+ dev_warn(master->dev.parent, "overrun (%u/%u remaining)\n",
spi_readl(as, TCR), spi_readl(as, RCR));
/*
@@ -442,7 +449,7 @@ atmel_spi_interrupt(int irq, void *dev_id)
spi_readl(as, SR);
atmel_spi_msg_done(master, as, msg, -EIO, 0);
- } else if (pending & SPI_BIT(ENDRX)) {
+ } else if (pending & (SPI_BIT(RXBUFF) | SPI_BIT(ENDRX))) {
ret = IRQ_HANDLED;
spi_writel(as, IDR, pending);