Add bb_miiphy_bus function for designware bitbang feature.
Signed-off-by: Jim Liu <[email protected]>
---
Changes for v2:
- add bitbang delay dts read
- modify printf to debug
---
drivers/net/designware.c | 105 +++++++++++++++++++++++++++++++++++++++
drivers/net/designware.h | 5 ++
2 files changed, 110 insertions(+)
diff --git a/drivers/net/designware.c b/drivers/net/designware.c
index a174344b3e..e86f96fc1a 100644
--- a/drivers/net/designware.c
+++ b/drivers/net/designware.c
@@ -767,6 +767,31 @@ int designware_eth_probe(struct udevice *dev)
priv->bus = miiphy_get_dev_by_name(dev->name);
priv->dev = dev;
+#if defined(CONFIG_BITBANGMII) && CONFIG_IS_ENABLED(DM_GPIO)
+ if (dev_read_bool(dev, "snps,bitbang-mii")) {
+ debug("\n%s: use bitbang mii..\n", dev->name);
+ ret = gpio_request_by_name(dev, "snps,mdc-gpio", 0,
+ &priv->mdc_gpio, GPIOD_IS_OUT |
GPIOD_IS_OUT_ACTIVE);
+ if (ret) {
+ printf("no mdc-gpio\n");
+ return ret;
+ }
+ ret = gpio_request_by_name(dev, "snps,mdio-gpio", 0,
+ &priv->mdio_gpio, GPIOD_IS_OUT |
GPIOD_IS_OUT_ACTIVE);
+ if (ret) {
+ printf("no mdio-gpio\n");
+ return ret;
+ }
+
+ priv->bb_delay = dev_read_u32_default(dev,
"snps,bitbang-delay", 1);
+
+ bb_miiphy_buses[0].priv = priv;
+ sprintf(bb_miiphy_buses[0].name, dev->name);
+ priv->bus->read = bb_miiphy_read;
+ priv->bus->write = bb_miiphy_write;
+ }
+#endif
+
ret = dw_phy_init(priv, dev);
debug("%s, ret=%d\n", __func__, ret);
if (!ret)
@@ -876,3 +901,83 @@ static struct pci_device_id supported[] = {
};
U_BOOT_PCI_DEVICE(eth_designware, supported);
+
+#if CONFIG_IS_ENABLED(BITBANGMII) && CONFIG_IS_ENABLED(DM_GPIO)
+static int dw_eth_bb_mdio_active(struct bb_miiphy_bus *bus)
+{
+ struct dw_eth_dev *priv = bus->priv;
+ struct gpio_desc *desc = &priv->mdio_gpio;
+
+ desc->flags = 0;
+ dm_gpio_set_dir_flags(&priv->mdio_gpio, GPIOD_IS_OUT |
GPIOD_IS_OUT_ACTIVE);
+
+ return 0;
+}
+
+static int dw_eth_bb_mdio_tristate(struct bb_miiphy_bus *bus)
+{
+ struct dw_eth_dev *priv = bus->priv;
+ struct gpio_desc *desc = &priv->mdio_gpio;
+
+ desc->flags = 0;
+ dm_gpio_set_dir_flags(&priv->mdio_gpio, GPIOD_IS_IN);
+
+ return 0;
+}
+
+static int dw_eth_bb_set_mdio(struct bb_miiphy_bus *bus, int v)
+{
+ struct dw_eth_dev *priv = bus->priv;
+
+ if (v)
+ dm_gpio_set_value(&priv->mdio_gpio, 1);
+ else
+ dm_gpio_set_value(&priv->mdio_gpio, 0);
+
+ return 0;
+}
+
+static int dw_eth_bb_get_mdio(struct bb_miiphy_bus *bus, int *v)
+{
+ struct dw_eth_dev *priv = bus->priv;
+
+ *v = dm_gpio_get_value(&priv->mdio_gpio);
+
+ return 0;
+}
+
+static int dw_eth_bb_set_mdc(struct bb_miiphy_bus *bus, int v)
+{
+ struct dw_eth_dev *priv = bus->priv;
+
+ if (v)
+ dm_gpio_set_value(&priv->mdc_gpio, 1);
+ else
+ dm_gpio_set_value(&priv->mdc_gpio, 0);
+
+ return 0;
+}
+
+static int dw_eth_bb_delay(struct bb_miiphy_bus *bus)
+{
+ struct dw_eth_dev *priv = bus->priv;
+ printf("jim[%d]\n",priv->bb_delay);
+ udelay(priv->bb_delay);
+
+ return 0;
+}
+
+struct bb_miiphy_bus bb_miiphy_buses[] = {
+ {
+ .name = "bb_miiphy",
+ .mdio_active = dw_eth_bb_mdio_active,
+ .mdio_tristate = dw_eth_bb_mdio_tristate,
+ .set_mdio = dw_eth_bb_set_mdio,
+ .get_mdio = dw_eth_bb_get_mdio,
+ .set_mdc = dw_eth_bb_set_mdc,
+ .delay = dw_eth_bb_delay,
+ }
+};
+
+int bb_miiphy_buses_num = ARRAY_SIZE(bb_miiphy_buses);
+#endif
diff --git a/drivers/net/designware.h b/drivers/net/designware.h
index 918a38615a..cf8de35cfe 100644
--- a/drivers/net/designware.h
+++ b/drivers/net/designware.h
@@ -230,11 +230,16 @@ struct dw_eth_dev {
u32 max_speed;
u32 tx_currdescnum;
u32 rx_currdescnum;
+#if defined(CONFIG_BITBANGMII)
+ u32 bb_delay;
+#endif
struct eth_mac_regs *mac_regs_p;
struct eth_dma_regs *dma_regs_p;
#if CONFIG_IS_ENABLED(DM_GPIO)
struct gpio_desc reset_gpio;
+ struct gpio_desc mdc_gpio;
+ struct gpio_desc mdio_gpio;
#endif
#ifdef CONFIG_CLK
struct clk *clocks; /* clock list */
--
2.25.1
