The dm_spi_ops.xfer() API does not support dual and quad SPI modes. It also doesn't allow the zynqmp_gqspi driver to calculate the correct number of dummy cycles for some NOR ops (as doing so also requires the buswidth).
Port the zynqmp_gqspi driver to spi_controller_mem_ops, which gives us the buswidth values to correctly support all SNOR_PROTO_X_X_X commands and to properly calculate dummy cycles.
Signed-off-by: Brandon Maier brandon.maier@rockwellcollins.com CC: jagan@amarulasolutions.com CC: michal.simek@xilinx.com CC: Ashok Reddy Soma ashokred@xilinx.com --- v1: https://lists.denx.de/pipermail/u-boot/2021-January/437506.html
v2: - Initialize 'ret' to 0 for exec_op() commands without data in/out. --- drivers/spi/zynqmp_gqspi.c | 164 ++++++++++++++++--------------------- 1 file changed, 70 insertions(+), 94 deletions(-)
diff --git a/drivers/spi/zynqmp_gqspi.c b/drivers/spi/zynqmp_gqspi.c index efcbd0557f..c7db43a09a 100644 --- a/drivers/spi/zynqmp_gqspi.c +++ b/drivers/spi/zynqmp_gqspi.c @@ -16,6 +16,7 @@ #include <malloc.h> #include <memalign.h> #include <spi.h> +#include <spi-mem.h> #include <ubi_uboot.h> #include <wait_bit.h> #include <dm/device_compat.h> @@ -171,8 +172,7 @@ struct zynqmp_qspi_priv { unsigned int len; int bytes_to_transfer; int bytes_to_receive; - unsigned int is_inst; - unsigned int cs_change:1; + const struct spi_mem_op *op; };
static int zynqmp_qspi_of_to_plat(struct udevice *bus) @@ -221,6 +221,21 @@ static u32 zynqmp_qspi_bus_select(struct zynqmp_qspi_priv *priv) return gqspi_fifo_reg; }
+static u32 zynqmp_qspi_genfifo_mode(u8 buswidth) +{ + switch (buswidth) { + case 1: + return GQSPI_SPI_MODE_SPI; + case 2: + return GQSPI_SPI_MODE_DUAL_SPI; + case 4: + return GQSPI_SPI_MODE_QSPI; + default: + debug("Unsupported bus width %u\n", buswidth); + return GQSPI_SPI_MODE_SPI; + } +} + static void zynqmp_qspi_fill_gen_fifo(struct zynqmp_qspi_priv *priv, u32 gqspi_fifo_reg) { @@ -445,21 +460,42 @@ static int zynqmp_qspi_fill_tx_fifo(struct zynqmp_qspi_priv *priv, u32 size)
static void zynqmp_qspi_genfifo_cmd(struct zynqmp_qspi_priv *priv) { + const struct spi_mem_op *op = priv->op; u32 gen_fifo_cmd; - u32 bytecount = 0; + u8 i, dummy_cycles, addr; + + /* Send opcode */ + gen_fifo_cmd = zynqmp_qspi_bus_select(priv); + gen_fifo_cmd |= zynqmp_qspi_genfifo_mode(op->cmd.buswidth); + gen_fifo_cmd |= GQSPI_GFIFO_TX; + gen_fifo_cmd |= op->cmd.opcode; + zynqmp_qspi_fill_gen_fifo(priv, gen_fifo_cmd); + + /* Send address */ + for (i = 0; i < op->addr.nbytes; i++) { + addr = op->addr.val >> (8 * (op->addr.nbytes - i - 1));
- while (priv->len) { gen_fifo_cmd = zynqmp_qspi_bus_select(priv); - gen_fifo_cmd |= GQSPI_GFIFO_TX | GQSPI_SPI_MODE_SPI; - gen_fifo_cmd |= *(u8 *)priv->tx_buf; - bytecount++; - priv->len--; - priv->tx_buf = (u8 *)priv->tx_buf + 1; + gen_fifo_cmd |= zynqmp_qspi_genfifo_mode(op->addr.buswidth); + gen_fifo_cmd |= GQSPI_GFIFO_TX; + gen_fifo_cmd |= addr;
debug("GFIFO_CMD_Cmd = 0x%x\n", gen_fifo_cmd);
zynqmp_qspi_fill_gen_fifo(priv, gen_fifo_cmd); } + + /* Send dummy */ + if (op->dummy.nbytes) { + dummy_cycles = op->dummy.nbytes * 8 / op->dummy.buswidth; + + gen_fifo_cmd = zynqmp_qspi_bus_select(priv); + gen_fifo_cmd |= zynqmp_qspi_genfifo_mode(op->dummy.buswidth); + gen_fifo_cmd &= ~(GQSPI_GFIFO_TX | GQSPI_GFIFO_RX); + gen_fifo_cmd |= GQSPI_GFIFO_DATA_XFR_MASK; + gen_fifo_cmd |= dummy_cycles; + zynqmp_qspi_fill_gen_fifo(priv, gen_fifo_cmd); + } }
static u32 zynqmp_qspi_calc_exp(struct zynqmp_qspi_priv *priv, @@ -496,11 +532,10 @@ static int zynqmp_qspi_genfifo_fill_tx(struct zynqmp_qspi_priv *priv) int ret = 0;
gen_fifo_cmd = zynqmp_qspi_bus_select(priv); + gen_fifo_cmd |= zynqmp_qspi_genfifo_mode(priv->op->data.buswidth); gen_fifo_cmd |= GQSPI_GFIFO_TX | GQSPI_GFIFO_DATA_XFR_MASK;
- gen_fifo_cmd |= GQSPI_SPI_MODE_SPI; - while (priv->len) { len = zynqmp_qspi_calc_exp(priv, &gen_fifo_cmd); zynqmp_qspi_fill_gen_fifo(priv, gen_fifo_cmd); @@ -574,11 +609,10 @@ static int zynqmp_qspi_genfifo_fill_rx(struct zynqmp_qspi_priv *priv) u32 actuallen = priv->len;
gen_fifo_cmd = zynqmp_qspi_bus_select(priv); + gen_fifo_cmd |= zynqmp_qspi_genfifo_mode(priv->op->data.buswidth); gen_fifo_cmd |= GQSPI_GFIFO_RX | GQSPI_GFIFO_DATA_XFR_MASK;
- gen_fifo_cmd |= GQSPI_SPI_MODE_SPI; - /* * Check if receive buffer is aligned to 4 byte and length * is multiples of four byte as we are using dma to receive. @@ -595,62 +629,6 @@ static int zynqmp_qspi_genfifo_fill_rx(struct zynqmp_qspi_priv *priv) return zynqmp_qspi_start_dma(priv, gen_fifo_cmd, buf); }
-static int zynqmp_qspi_start_transfer(struct zynqmp_qspi_priv *priv) -{ - int ret = 0; - - if (priv->is_inst) { - if (priv->tx_buf) - zynqmp_qspi_genfifo_cmd(priv); - else - return -EINVAL; - } else { - if (priv->tx_buf) - ret = zynqmp_qspi_genfifo_fill_tx(priv); - else if (priv->rx_buf) - ret = zynqmp_qspi_genfifo_fill_rx(priv); - else - return -EINVAL; - } - return ret; -} - -static int zynqmp_qspi_transfer(struct zynqmp_qspi_priv *priv) -{ - static unsigned int cs_change = 1; - int status = 0; - - debug("%s\n", __func__); - - while (1) { - /* Select the chip if required */ - if (cs_change) - zynqmp_qspi_chipselect(priv, 1); - - cs_change = priv->cs_change; - - if (!priv->tx_buf && !priv->rx_buf && priv->len) { - status = -EINVAL; - break; - } - - /* Request the transfer */ - if (priv->len) { - status = zynqmp_qspi_start_transfer(priv); - priv->is_inst = 0; - if (status < 0) - break; - } - - if (cs_change) - /* Deselect the chip */ - zynqmp_qspi_chipselect(priv, 0); - break; - } - - return status; -} - static int zynqmp_qspi_claim_bus(struct udevice *dev) { struct udevice *bus = dev->parent; @@ -673,45 +651,43 @@ static int zynqmp_qspi_release_bus(struct udevice *dev) return 0; }
-int zynqmp_qspi_xfer(struct udevice *dev, unsigned int bitlen, const void *dout, - void *din, unsigned long flags) +static int zynqmp_qspi_exec_op(struct spi_slave *slave, + const struct spi_mem_op *op) { - struct udevice *bus = dev->parent; - struct zynqmp_qspi_priv *priv = dev_get_priv(bus); + struct zynqmp_qspi_priv *priv = dev_get_priv(slave->dev->parent); + int ret = 0;
- debug("%s: priv: 0x%08lx bitlen: %d dout: 0x%08lx ", __func__, - (unsigned long)priv, bitlen, (unsigned long)dout); - debug("din: 0x%08lx flags: 0x%lx\n", (unsigned long)din, flags); + priv->op = op; + priv->tx_buf = op->data.buf.out; + priv->rx_buf = op->data.buf.in; + priv->len = op->data.nbytes;
- priv->tx_buf = dout; - priv->rx_buf = din; - priv->len = bitlen / 8; + zynqmp_qspi_chipselect(priv, 1);
- /* - * Assume that the beginning of a transfer with bits to - * transmit must contain a device command. - */ - if (dout && flags & SPI_XFER_BEGIN) - priv->is_inst = 1; - else - priv->is_inst = 0; + /* Send opcode, addr, dummy */ + zynqmp_qspi_genfifo_cmd(priv);
- if (flags & SPI_XFER_END) - priv->cs_change = 1; - else - priv->cs_change = 0; + /* Request the transfer */ + if (op->data.dir == SPI_MEM_DATA_IN) + ret = zynqmp_qspi_genfifo_fill_rx(priv); + else if (op->data.dir == SPI_MEM_DATA_OUT) + ret = zynqmp_qspi_genfifo_fill_tx(priv);
- zynqmp_qspi_transfer(priv); + zynqmp_qspi_chipselect(priv, 0);
- return 0; + return ret; }
+static const struct spi_controller_mem_ops zynqmp_qspi_mem_ops = { + .exec_op = zynqmp_qspi_exec_op, +}; + static const struct dm_spi_ops zynqmp_qspi_ops = { .claim_bus = zynqmp_qspi_claim_bus, .release_bus = zynqmp_qspi_release_bus, - .xfer = zynqmp_qspi_xfer, .set_speed = zynqmp_qspi_set_speed, .set_mode = zynqmp_qspi_set_mode, + .mem_ops = &zynqmp_qspi_mem_ops, };
static const struct udevice_id zynqmp_qspi_ids[] = {