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Simple PCIe FMC carrier SPEC
Commit 94d7d1c2 authored by Federico Vaga's avatar Federico Vaga
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sw:drv:spi: group full-duplex operations in una function 

Signed-off-by: Federico Vaga's avatarFederico Vaga <federico.vaga@cern.ch>
parent dba5e3ac
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Showing with 24 additions and 11 deletions
software/kernel/spi-ocores.c
View file @ 94d7d1c2
......@@ -558,6 +558,24 @@ static bool spi_ocores_is_busy(struct spi_ocores *sp)
return (ctrl & SPI_OCORES_CTRL_BUSY);
}
/**
* Pop RX word and push next TX from current transfer
* @sp: SPI OCORE controller
*
* Return: 0 on success, -ENODATA when there is nothing to process
*/
static int spi_ocores_hw_xfer_rxtx(struct spi_ocores *sp)
{
spi_ocores_hw_xfer_rx_pop(sp);
if (spi_ocores_sw_xfer_has_pending(sp))
return -ENODATA;
spi_ocores_hw_xfer_tx_push(sp);
spi_ocores_hw_xfer_start(sp);
return 0;
}
/**
* Process an SPI transfer
* @sp: SPI OCORE controller
......@@ -566,22 +584,17 @@ static bool spi_ocores_is_busy(struct spi_ocores *sp)
*/
static int spi_ocores_process(struct spi_ocores *sp)
{
int err;
if (spi_ocores_is_busy(sp))
return -EBUSY;
spi_ocores_hw_xfer_rx_pop(sp);
if (spi_ocores_sw_xfer_has_pending(sp)) {
spi_ocores_hw_xfer_tx_push(sp);
spi_ocores_hw_xfer_start(sp);
} else {
int err;
err = spi_ocores_hw_xfer_rxtx(sp);
if (err == -ENODATA) {
spi_ocores_sw_xfer_finish(sp);
err = spi_ocores_sw_xfer_next_start(sp);
if (err) {
/* Error or no more transfers */
if (err)
spi_ocores_finalize_current_message(sp);
}
}
return 0;
......@@ -614,7 +627,7 @@ static irqreturn_t spi_ocores_irq_handler(int irq, void *arg)
int err;
err = spi_ocores_process(sp);
if (err)
if (err && err != -ENODATA)
return IRQ_NONE;
return IRQ_HANDLED;
......
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