diff options
Diffstat (limited to 'drivers/spi/ti_qspi.c')
| -rw-r--r-- | drivers/spi/ti_qspi.c | 52 |
1 files changed, 36 insertions, 16 deletions
diff --git a/drivers/spi/ti_qspi.c b/drivers/spi/ti_qspi.c index bb72cb0..52520df 100644 --- a/drivers/spi/ti_qspi.c +++ b/drivers/spi/ti_qspi.c @@ -23,6 +23,9 @@ DECLARE_GLOBAL_DATA_PTR; #define QSPI_TIMEOUT 2000000 #define QSPI_FCLK 192000000 #define QSPI_DRA7XX_FCLK 76800000 +#define QSPI_WLEN_MAX_BITS 128 +#define QSPI_WLEN_MAX_BYTES (QSPI_WLEN_MAX_BITS >> 3) +#define QSPI_WLEN_MASK QSPI_WLEN(QSPI_WLEN_MAX_BITS) /* clock control */ #define QSPI_CLK_EN BIT(31) #define QSPI_CLK_DIV_MAX 0xffff @@ -223,20 +226,34 @@ static int __ti_qspi_xfer(struct ti_qspi_priv *priv, unsigned int bitlen, priv->cmd |= QSPI_3_PIN; priv->cmd |= 0xfff; -/* FIXME: This delay is required for successfull - * completion of read/write/erase. Once its root - * caused, it will be remove from the driver. - */ -#ifdef CONFIG_AM43XX - udelay(100); -#endif - while (words--) { + while (words) { + u8 xfer_len = 0; + if (txp) { - debug("tx cmd %08x dc %08x data %02x\n", - priv->cmd | QSPI_WR_SNGL, priv->dc, *txp); - writel(*txp++, &priv->base->data); - writel(priv->cmd | QSPI_WR_SNGL, - &priv->base->cmd); + u32 cmd = priv->cmd; + + if (words >= QSPI_WLEN_MAX_BYTES) { + u32 *txbuf = (u32 *)txp; + u32 data; + + data = cpu_to_be32(*txbuf++); + writel(data, &priv->base->data3); + data = cpu_to_be32(*txbuf++); + writel(data, &priv->base->data2); + data = cpu_to_be32(*txbuf++); + writel(data, &priv->base->data1); + data = cpu_to_be32(*txbuf++); + writel(data, &priv->base->data); + cmd &= ~QSPI_WLEN_MASK; + cmd |= QSPI_WLEN(QSPI_WLEN_MAX_BITS); + xfer_len = QSPI_WLEN_MAX_BYTES; + } else { + writeb(*txp, &priv->base->data); + xfer_len = 1; + } + debug("tx cmd %08x dc %08x\n", + cmd | QSPI_WR_SNGL, priv->dc); + writel(cmd | QSPI_WR_SNGL, &priv->base->cmd); status = readl(&priv->base->status); timeout = QSPI_TIMEOUT; while ((status & QSPI_WC_BUSY) != QSPI_XFER_DONE) { @@ -246,6 +263,7 @@ static int __ti_qspi_xfer(struct ti_qspi_priv *priv, unsigned int bitlen, } status = readl(&priv->base->status); } + txp += xfer_len; debug("tx done, status %08x\n", status); } if (rxp) { @@ -262,9 +280,11 @@ static int __ti_qspi_xfer(struct ti_qspi_priv *priv, unsigned int bitlen, status = readl(&priv->base->status); } *rxp++ = readl(&priv->base->data); + xfer_len = 1; debug("rx done, status %08x, read %02x\n", status, *(rxp-1)); } + words -= xfer_len; } /* Terminate frame */ @@ -336,7 +356,7 @@ static void ti_spi_setup_spi_register(struct ti_qspi_priv *priv) QSPI_SETUP0_NUM_D_BYTES_8_BITS | QSPI_SETUP0_READ_QUAD | QSPI_CMD_WRITE | QSPI_NUM_DUMMY_BITS); - slave->mode_rx = SPI_RX_QUAD; + slave->mode |= SPI_RX_QUAD; #else memval |= QSPI_CMD_READ | QSPI_SETUP0_NUM_A_BYTES | QSPI_SETUP0_NUM_D_BYTES_NO_BITS | @@ -422,7 +442,7 @@ static void __ti_qspi_setup_memorymap(struct ti_qspi_priv *priv, bool enable) { u32 memval; - u32 mode = slave->mode_rx & (SPI_RX_QUAD | SPI_RX_DUAL); + u32 mode = slave->mode & (SPI_RX_QUAD | SPI_RX_DUAL); if (!enable) { writel(0, &priv->base->setup0); @@ -436,7 +456,7 @@ static void __ti_qspi_setup_memorymap(struct ti_qspi_priv *priv, memval |= QSPI_CMD_READ_QUAD; memval |= QSPI_SETUP0_NUM_D_BYTES_8_BITS; memval |= QSPI_SETUP0_READ_QUAD; - slave->mode_rx = SPI_RX_QUAD; + slave->mode |= SPI_RX_QUAD; break; case SPI_RX_DUAL: memval |= QSPI_CMD_READ_DUAL; |