diff options
| -rw-r--r-- | drivers/spi/spi-dw-mid.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/spi/spi-dw-mid.c b/drivers/spi/spi-dw-mid.c index 4b4d266..3729cdd 100644 --- a/drivers/spi/spi-dw-mid.c +++ b/drivers/spi/spi-dw-mid.c @@ -100,6 +100,22 @@ static void mid_spi_dma_exit(struct dw_spi *dws) dma_release_channel(dws->rxchan); } +static irqreturn_t dma_transfer(struct dw_spi *dws) +{ + u16 irq_status = dw_readw(dws, DW_SPI_ISR); + + if (!irq_status) + return IRQ_NONE; + + dw_readw(dws, DW_SPI_ICR); + spi_reset_chip(dws); + + dev_err(&dws->master->dev, "%s: FIFO overrun/underrun\n", __func__); + dws->master->cur_msg->status = -EIO; + spi_finalize_current_transfer(dws->master); + return IRQ_HANDLED; +} + static enum dma_slave_buswidth convert_dma_width(u32 dma_width) { if (dma_width == 1) return DMA_SLAVE_BUSWIDTH_1_BYTE; @@ -220,6 +236,11 @@ static int mid_spi_dma_setup(struct dw_spi *dws) dma_ctrl |= SPI_DMA_RDMAE; dw_writew(dws, DW_SPI_DMACR, dma_ctrl); + /* Set the interrupt mask */ + spi_umask_intr(dws, SPI_INT_TXOI | SPI_INT_RXUI | SPI_INT_RXOI); + + dws->transfer_handler = dma_transfer; + return 0; } |