return 0;
}
-static int dw_spi_ofdata_to_platdata(struct udevice *bus)
+static int dw_spi_of_to_plat(struct udevice *bus)
{
- struct dw_spi_platdata *plat = bus->platdata;
+ struct dw_spi_plat *plat = bus->plat;
plat->regs = dev_read_addr_ptr(bus);
+ if (!plat->regs)
+ return -EINVAL;
/* Use 500KHz as a suitable default */
plat->frequency = dev_read_u32_default(bus, "spi-max-frequency",
return 0;
}
+ typedef int (*dw_spi_init_t)(struct udevice *bus, struct dw_spi_priv *priv);
+
static int dw_spi_probe(struct udevice *bus)
{
- struct dw_spi_platdata *plat = dev_get_platdata(bus);
+ dw_spi_init_t init = (dw_spi_init_t)dev_get_driver_data(bus);
+ struct dw_spi_plat *plat = dev_get_plat(bus);
struct dw_spi_priv *priv = dev_get_priv(bus);
int ret;
+ u32 version;
priv->regs = plat->regs;
priv->freq = plat->frequency;
return ret;
}
+ /*
+ * This function is necessary for reading SPI flash with the native CS
+ * c.f. https://lkml.org/lkml/2015/12/23/132
+ */
+ static int dw_spi_exec_op(struct spi_slave *slave, const struct spi_mem_op *op)
+ {
+ bool read = op->data.dir == SPI_MEM_DATA_IN;
+ int pos, i, ret = 0;
+ struct udevice *bus = slave->dev->parent;
+ struct dw_spi_priv *priv = dev_get_priv(bus);
+ u8 op_len = sizeof(op->cmd.opcode) + op->addr.nbytes + op->dummy.nbytes;
+ u8 op_buf[op_len];
+ u32 cr0;
+
+ if (read)
+ priv->tmode = CTRLR0_TMOD_EPROMREAD;
+ else
+ priv->tmode = CTRLR0_TMOD_TO;
+
+ cr0 = priv->update_cr0(priv);
+ dev_dbg(bus, "cr0=%08x buf=%p len=%u [bytes]\n", cr0, op->data.buf.in,
+ op->data.nbytes);
+
+ dw_write(priv, DW_SPI_SSIENR, 0);
+ dw_write(priv, DW_SPI_CTRLR0, cr0);
+ if (read)
+ dw_write(priv, DW_SPI_CTRLR1, op->data.nbytes - 1);
+ dw_write(priv, DW_SPI_SSIENR, 1);
+
+ /* From spi_mem_exec_op */
+ pos = 0;
+ op_buf[pos++] = op->cmd.opcode;
+ if (op->addr.nbytes) {
+ for (i = 0; i < op->addr.nbytes; i++)
+ op_buf[pos + i] = op->addr.val >>
+ (8 * (op->addr.nbytes - i - 1));
+
+ pos += op->addr.nbytes;
+ }
+ if (op->dummy.nbytes)
+ memset(op_buf + pos, 0xff, op->dummy.nbytes);
+
+ external_cs_manage(slave->dev, false);
+
+ priv->tx = &op_buf;
+ priv->tx_end = priv->tx + op_len;
+ priv->rx = NULL;
+ priv->rx_end = NULL;
+ while (priv->tx != priv->tx_end)
+ dw_writer(priv);
+
+ /*
+ * XXX: The following are tight loops! Enabling debug messages may cause
+ * them to fail because we are not reading/writing the fifo fast enough.
+ */
+ if (read) {
+ priv->rx = op->data.buf.in;
+ priv->rx_end = priv->rx + op->data.nbytes;
+
+ dw_write(priv, DW_SPI_SER, 1 << spi_chip_select(slave->dev));
+ while (priv->rx != priv->rx_end)
+ dw_reader(priv);
+ } else {
+ u32 val;
+
+ priv->tx = op->data.buf.out;
+ priv->tx_end = priv->tx + op->data.nbytes;
+
+ /* Fill up the write fifo before starting the transfer */
+ dw_writer(priv);
+ dw_write(priv, DW_SPI_SER, 1 << spi_chip_select(slave->dev));
+ while (priv->tx != priv->tx_end)
+ dw_writer(priv);
+
+ if (readl_poll_timeout(priv->regs + DW_SPI_SR, val,
+ (val & SR_TF_EMPT) && !(val & SR_BUSY),
+ RX_TIMEOUT * 1000)) {
+ ret = -ETIMEDOUT;
+ }
+ }
+
+ dw_write(priv, DW_SPI_SER, 0);
+ external_cs_manage(slave->dev, true);
+
+ dev_dbg(bus, "%u bytes xfered\n", op->data.nbytes);
+ return ret;
+ }
+
+ /* The size of ctrl1 limits data transfers to 64K */
+ static int dw_spi_adjust_op_size(struct spi_slave *slave, struct spi_mem_op *op)
+ {
+ op->data.nbytes = min(op->data.nbytes, (unsigned int)SZ_64K);
+
+ return 0;
+ }
+
+ static const struct spi_controller_mem_ops dw_spi_mem_ops = {
+ .exec_op = dw_spi_exec_op,
+ .adjust_op_size = dw_spi_adjust_op_size,
+ };
+
static int dw_spi_set_speed(struct udevice *bus, uint speed)
{
- struct dw_spi_platdata *plat = dev_get_platdata(bus);
+ struct dw_spi_plat *plat = bus->plat;
struct dw_spi_priv *priv = dev_get_priv(bus);
u16 clk_div;
for (device_find_first_child(bus, &dev); dev;
device_find_next_child(&dev)) {
- struct dm_spi_slave_platdata *plat;
+ struct dm_spi_slave_plat *plat;
- plat = dev_get_parent_platdata(dev);
+ plat = dev_get_parent_plat(dev);
- debug("%s: plat=%p, cs=%d\n", __func__, plat, plat->cs);
+ dev_dbg(bus, "%s: plat=%p, cs=%d\n", __func__, plat, plat->cs);
if (plat->cs == cs) {
*devp = dev;
return 0;
struct udevice *bus;
int ret;
- ret = uclass_find_device_by_seq(UCLASS_SPI, busnum, false, &bus);
+ ret = uclass_find_device_by_seq(UCLASS_SPI, busnum, &bus);
if (ret) {
- debug("%s: No bus %d\n", __func__, busnum);
+ log_debug("%s: No bus %d\n", __func__, busnum);
return ret;
}
struct udevice *bus, *dev;
int ret;
- ret = uclass_find_device_by_seq(UCLASS_SPI, busnum, false, &bus);
+ ret = uclass_find_device_by_seq(UCLASS_SPI, busnum, &bus);
if (ret) {
- debug("%s: No bus %d\n", __func__, busnum);
+ log_debug("%s: No bus %d\n", __func__, busnum);
return ret;
}
ret = spi_find_chip_select(bus, cs, &dev);
* SPI flash chip - we will bind to the correct driver.
*/
if (ret == -ENODEV && drv_name) {
- debug("%s: Binding new device '%s', busnum=%d, cs=%d, driver=%s\n",
- __func__, dev_name, busnum, cs, drv_name);
+ dev_dbg(bus, "%s: Binding new device '%s', busnum=%d, cs=%d, driver=%s\n",
+ __func__, dev_name, busnum, cs, drv_name);
ret = device_bind_driver(bus, drv_name, dev_name, &dev);
if (ret) {
- debug("%s: Unable to bind driver (ret=%d)\n", __func__,
- ret);
+ dev_dbg(bus, "%s: Unable to bind driver (ret=%d)\n",
+ __func__, ret);
return ret;
}
- plat = dev_get_parent_platdata(dev);
+ plat = dev_get_parent_plat(dev);
plat->cs = cs;
if (speed) {
plat->max_hz = speed;