diff options
Diffstat (limited to 'drivers/spi/fsl_qspi.c')
| -rw-r--r-- | drivers/spi/fsl_qspi.c | 30 |
1 files changed, 25 insertions, 5 deletions
diff --git a/drivers/spi/fsl_qspi.c b/drivers/spi/fsl_qspi.c index ae1559c..a01867e 100644 --- a/drivers/spi/fsl_qspi.c +++ b/drivers/spi/fsl_qspi.c @@ -478,6 +478,13 @@ static int fsl_qspi_init(struct fsl_qspi *q) /* init for AHB read */ fsl_qspi_init_abh_read(q); + + /* + * High level code use page_size and max_write_size to calculate + * the number of bytes that should be programmed once. + */ + q->slave.max_write_size = q->devtype_data->txfifo; + return 0; } @@ -701,7 +708,7 @@ static void fsl_qspi_ip_read(struct fsl_qspi *q, int len, u8 *rxbuf) tmp = fsl_qspi_endian_xchg(q, tmp); if (len >= 4) { - *((u32 *)rxbuf) = tmp; + memcpy(rxbuf, &tmp, 4); rxbuf += 4; } else { memcpy(rxbuf, &tmp, len); @@ -717,19 +724,32 @@ static void fsl_qspi_ip_read(struct fsl_qspi *q, int len, u8 *rxbuf) static void fsl_qspi_write_data(struct fsl_qspi *q, int len, u8* txbuf) { u32 tmp; - int i, j; + u32 t1, t2; + int j; - /* clear the TX FIFO. */ + /* clear the TX FIFO. */ tmp = readl(q->iobase + QUADSPI_MCR); writel(tmp | QUADSPI_MCR_CLR_RXF_MASK, q->iobase + QUADSPI_MCR); /* fill the TX data to the FIFO */ - for (j = 0, i = ((len + 3) / 4); j < i; j++) { - tmp = fsl_qspi_endian_xchg(q, *(u32 *)txbuf); + t2 = len % 4; + t1 = len >> 2; /* 4 Bytes aligned */ + + for (j = 0; j < t1; j++) { + memcpy(&tmp, txbuf, 4); + tmp = fsl_qspi_endian_xchg(q, tmp); writel(tmp, q->iobase + QUADSPI_TBDR); txbuf += 4; } + + if (t2) { + tmp = 0; + memcpy(&tmp, txbuf, t2); + tmp = fsl_qspi_endian_xchg(q, tmp); + writel(tmp, q->iobase + QUADSPI_TBDR); + } } + /* see the spi_flash_read_write() */ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout, void *din, unsigned long flags) |