diff options
| author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-12-15 14:52:16 -0300 |
|---|---|---|
| committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-12-15 14:52:16 -0300 |
| commit | 8d91c1e411f55d7ea91b1183a2e9f8088fb4d5be (patch) | |
| tree | e9891aa6c295060d065adffd610c4f49ecf884f3 /drivers/spi/spi-ti-qspi.c | |
| parent | a71852147516bc1cb5b0b3cbd13639bfd4022dc8 (diff) | |
Linux-libre 4.3.2-gnu
Diffstat (limited to 'drivers/spi/spi-ti-qspi.c')
| -rw-r--r-- | drivers/spi/spi-ti-qspi.c | 34 |
1 files changed, 30 insertions, 4 deletions
diff --git a/drivers/spi/spi-ti-qspi.c b/drivers/spi/spi-ti-qspi.c index 5c0616870..aa6d28413 100644 --- a/drivers/spi/spi-ti-qspi.c +++ b/drivers/spi/spi-ti-qspi.c @@ -99,6 +99,8 @@ struct ti_qspi { #define QSPI_INVAL (4 << 16) #define QSPI_WC_CMD_INT_EN (1 << 14) #define QSPI_FLEN(n) ((n - 1) << 0) +#define QSPI_WLEN_MAX_BITS 128 +#define QSPI_WLEN_MAX_BYTES 16 /* STATUS REGISTER */ #define BUSY 0x01 @@ -217,14 +219,16 @@ static inline u32 qspi_is_busy(struct ti_qspi *qspi) static int qspi_write_msg(struct ti_qspi *qspi, struct spi_transfer *t) { - int wlen, count; + int wlen, count, xfer_len; unsigned int cmd; const u8 *txbuf; + u32 data; txbuf = t->tx_buf; cmd = qspi->cmd | QSPI_WR_SNGL; count = t->len; wlen = t->bits_per_word >> 3; /* in bytes */ + xfer_len = wlen; while (count) { if (qspi_is_busy(qspi)) @@ -234,7 +238,29 @@ static int qspi_write_msg(struct ti_qspi *qspi, struct spi_transfer *t) case 1: dev_dbg(qspi->dev, "tx cmd %08x dc %08x data %02x\n", cmd, qspi->dc, *txbuf); - writeb(*txbuf, qspi->base + QSPI_SPI_DATA_REG); + if (count >= QSPI_WLEN_MAX_BYTES) { + u32 *txp = (u32 *)txbuf; + + data = cpu_to_be32(*txp++); + writel(data, qspi->base + + QSPI_SPI_DATA_REG_3); + data = cpu_to_be32(*txp++); + writel(data, qspi->base + + QSPI_SPI_DATA_REG_2); + data = cpu_to_be32(*txp++); + writel(data, qspi->base + + QSPI_SPI_DATA_REG_1); + data = cpu_to_be32(*txp++); + writel(data, qspi->base + + QSPI_SPI_DATA_REG); + xfer_len = QSPI_WLEN_MAX_BYTES; + cmd |= QSPI_WLEN(QSPI_WLEN_MAX_BITS); + } else { + writeb(*txbuf, qspi->base + QSPI_SPI_DATA_REG); + cmd = qspi->cmd | QSPI_WR_SNGL; + xfer_len = wlen; + cmd |= QSPI_WLEN(wlen); + } break; case 2: dev_dbg(qspi->dev, "tx cmd %08x dc %08x data %04x\n", @@ -254,8 +280,8 @@ static int qspi_write_msg(struct ti_qspi *qspi, struct spi_transfer *t) dev_err(qspi->dev, "write timed out\n"); return -ETIMEDOUT; } - txbuf += wlen; - count -= wlen; + txbuf += xfer_len; + count -= xfer_len; } return 0; |