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net: designware: Add bitbang feature for designware driver.

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Add bb_miiphy_bus function for designware bitbang feature.

Signed-off-by: Jim Liu <JJLIU0@nuvoton.com>
Signed-off-by: Michael Chang <zhang971090220@gmail.com>
This commit is contained in:
Michael Chang
2025-01-17 18:45:40 +08:00
committed by Tom Rini
parent a78ab77063
commit 6272fc8a2e
2 changed files with 118 additions and 1 deletions
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113
drivers/net/designware.c
View File

@@ -784,6 +784,39 @@ int designware_eth_probe(struct udevice *dev)
priv->bus = miiphy_get_dev_by_name(dev->name);
priv->dev = dev;
#if IS_ENABLED(CONFIG_BITBANGMII) && IS_ENABLED(CONFIG_DM_GPIO)
if (dev_read_bool(dev, "snps,bitbang-mii")) {
int bus_idx;
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) {
debug("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) {
debug("no mdio-gpio\n");
return ret;
}
priv->bb_delay = dev_read_u32_default(dev, "snps,bitbang-delay", 1);
for (bus_idx = 0; bus_idx < bb_miiphy_buses_num; bus_idx++) {
if (!bb_miiphy_buses[bus_idx].priv) {
bb_miiphy_buses[bus_idx].priv = priv;
strlcpy(bb_miiphy_buses[bus_idx].name, priv->bus->name,
MDIO_NAME_LEN);
priv->bus->read = bb_miiphy_read;
priv->bus->write = bb_miiphy_write;
break;
}
}
}
#endif
ret = dw_phy_init(priv, dev);
debug("%s, ret=%d\n", __func__, ret);
if (!ret)
@@ -894,3 +927,83 @@ static struct pci_device_id supported[] = {
};
U_BOOT_PCI_DEVICE(eth_designware, supported);
#if IS_ENABLED(CONFIG_BITBANGMII) && IS_ENABLED(CONFIG_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;
udelay(priv->bb_delay);
return 0;
}
struct bb_miiphy_bus bb_miiphy_buses[] = {
{
.name = BB_MII_DEVNAME,
.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,
.priv = NULL,
}
};
int bb_miiphy_buses_num = ARRAY_SIZE(bb_miiphy_buses);
#endif

6
drivers/net/designware.h
View File

@@ -229,7 +229,11 @@ struct dw_eth_dev {
u32 max_speed;
u32 tx_currdescnum;
u32 rx_currdescnum;
#if IS_ENABLED(CONFIG_BITBANGMII) && IS_ENABLED(CONFIG_DM_GPIO)
u32 bb_delay;
struct gpio_desc mdc_gpio;
struct gpio_desc mdio_gpio;
#endif
struct eth_mac_regs *mac_regs_p;
struct eth_dma_regs *dma_regs_p;
#if CONFIG_IS_ENABLED(DM_GPIO)