spi: mediatek: fix spi incorrect endian usage
TX_ENDIAN/RX_ENDIAN bits define whether to reverse the endian order of the data DMA from/to memory. The endian order should keep the same with cpu endian. Signed-off-by: Leilk Liu <leilk.liu@mediatek.com> Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
parent
c5e5cd28d7
commit
44f636da4e
@ -122,8 +122,6 @@ static const struct mtk_spi_compatible mt8173_compat = {
|
||||
static const struct mtk_chip_config mtk_default_chip_info = {
|
||||
.rx_mlsb = 1,
|
||||
.tx_mlsb = 1,
|
||||
.tx_endian = 0,
|
||||
.rx_endian = 0,
|
||||
};
|
||||
|
||||
static const struct of_device_id mtk_spi_of_match[] = {
|
||||
@ -161,9 +159,13 @@ static void mtk_spi_config(struct mtk_spi *mdata,
|
||||
reg_val |= (chip_config->rx_mlsb << SPI_CMD_RXMSBF_OFFSET);
|
||||
|
||||
/* set the tx/rx endian */
|
||||
reg_val &= ~(SPI_CMD_TX_ENDIAN | SPI_CMD_RX_ENDIAN);
|
||||
reg_val |= (chip_config->tx_endian << SPI_CMD_TX_ENDIAN_OFFSET);
|
||||
reg_val |= (chip_config->rx_endian << SPI_CMD_RX_ENDIAN_OFFSET);
|
||||
#ifdef __LITTLE_ENDIAN
|
||||
reg_val &= ~SPI_CMD_TX_ENDIAN;
|
||||
reg_val &= ~SPI_CMD_RX_ENDIAN;
|
||||
#else
|
||||
reg_val |= SPI_CMD_TX_ENDIAN;
|
||||
reg_val |= SPI_CMD_RX_ENDIAN;
|
||||
#endif
|
||||
|
||||
/* set finish and pause interrupt always enable */
|
||||
reg_val |= SPI_CMD_FINISH_IE | SPI_CMD_PAUSE_EN;
|
||||
@ -352,7 +354,7 @@ static int mtk_spi_fifo_transfer(struct spi_master *master,
|
||||
struct spi_device *spi,
|
||||
struct spi_transfer *xfer)
|
||||
{
|
||||
int cnt, i;
|
||||
int cnt;
|
||||
struct mtk_spi *mdata = spi_master_get_devdata(master);
|
||||
|
||||
mdata->cur_transfer = xfer;
|
||||
@ -364,10 +366,7 @@ static int mtk_spi_fifo_transfer(struct spi_master *master,
|
||||
cnt = xfer->len / 4 + 1;
|
||||
else
|
||||
cnt = xfer->len / 4;
|
||||
|
||||
for (i = 0; i < cnt; i++)
|
||||
writel(*((u32 *)xfer->tx_buf + i),
|
||||
mdata->base + SPI_TX_DATA_REG);
|
||||
iowrite32_rep(mdata->base + SPI_TX_DATA_REG, xfer->tx_buf, cnt);
|
||||
|
||||
mtk_spi_enable_transfer(master);
|
||||
|
||||
@ -437,7 +436,7 @@ static bool mtk_spi_can_dma(struct spi_master *master,
|
||||
|
||||
static irqreturn_t mtk_spi_interrupt(int irq, void *dev_id)
|
||||
{
|
||||
u32 cmd, reg_val, i;
|
||||
u32 cmd, reg_val, cnt;
|
||||
struct spi_master *master = dev_id;
|
||||
struct mtk_spi *mdata = spi_master_get_devdata(master);
|
||||
struct spi_transfer *trans = mdata->cur_transfer;
|
||||
@ -449,18 +448,13 @@ static irqreturn_t mtk_spi_interrupt(int irq, void *dev_id)
|
||||
mdata->state = MTK_SPI_IDLE;
|
||||
|
||||
if (!master->can_dma(master, master->cur_msg->spi, trans)) {
|
||||
/* xfer len is not N*4 bytes every time in a transfer,
|
||||
* but SPI_RX_DATA_REG must reads 4 bytes once,
|
||||
* so rx buffer byte by byte.
|
||||
*/
|
||||
if (trans->rx_buf) {
|
||||
for (i = 0; i < mdata->xfer_len; i++) {
|
||||
if (i % 4 == 0)
|
||||
reg_val =
|
||||
readl(mdata->base + SPI_RX_DATA_REG);
|
||||
*((u8 *)(trans->rx_buf + i)) =
|
||||
(reg_val >> ((i % 4) * 8)) & 0xff;
|
||||
}
|
||||
if (mdata->xfer_len % 4)
|
||||
cnt = mdata->xfer_len / 4 + 1;
|
||||
else
|
||||
cnt = mdata->xfer_len / 4;
|
||||
ioread32_rep(mdata->base + SPI_RX_DATA_REG,
|
||||
trans->rx_buf, cnt);
|
||||
}
|
||||
spi_finalize_current_transfer(master);
|
||||
return IRQ_HANDLED;
|
||||
|
@ -16,7 +16,5 @@
|
||||
struct mtk_chip_config {
|
||||
u32 tx_mlsb;
|
||||
u32 rx_mlsb;
|
||||
u32 tx_endian;
|
||||
u32 rx_endian;
|
||||
};
|
||||
#endif
|
||||
|
Loading…
Reference in New Issue
Block a user