Add bb_miiphy_bus function for designware bitbang feature.
Signed-off-by: Jim Liu <[email protected]>
Signed-off-by: Michael Chang <[email protected]>
---
arch/arm/dts/nuvoton-npcm845-evb.dts | 1 +
drivers/net/designware.c | 111 +++++++++++++++++++++++++++
drivers/net/designware.h | 6 +-
3 files changed, 117 insertions(+), 1 deletion(-)
diff --git a/arch/arm/dts/nuvoton-npcm845-evb.dts
b/arch/arm/dts/nuvoton-npcm845-evb.dts
index 0d3aaa0fff..1535defe38 100644
--- a/arch/arm/dts/nuvoton-npcm845-evb.dts
+++ b/arch/arm/dts/nuvoton-npcm845-evb.dts
@@ -190,6 +190,7 @@
snps,mdio-gpio = <&gpio2 28 GPIO_ACTIVE_HIGH>; /* gpio92 */
snps,reset-active-low;
snps,reset-delays-us = <0 10000 1000000>;
+ snps,bitbang-delay = <1>;
snps,reset-gpio = <&gpio2 29 GPIO_ACTIVE_LOW>; /* gpio93 */
status = "okay";
};
diff --git a/drivers/net/designware.c b/drivers/net/designware.c
index 07b0f49ef5..4fe13777e5 100644
--- a/drivers/net/designware.c
+++ b/drivers/net/designware.c
@@ -784,6 +784,37 @@ 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")) {
+ 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 +925,83 @@ 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 npcm_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 npcm_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 npcm_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 npcm_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 npcm_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 npcm_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 = npcm_eth_bb_mdio_active,
+ .mdio_tristate = npcm_eth_bb_mdio_tristate,
+ .set_mdio = npcm_eth_bb_set_mdio,
+ .get_mdio = npcm_eth_bb_get_mdio,
+ .set_mdc = npcm_eth_bb_set_mdc,
+ .delay = npcm_eth_bb_delay,
+ .priv = NULL,
+ }
+};
+
+int bb_miiphy_buses_num = ARRAY_SIZE(bb_miiphy_buses);
+#endif
diff --git a/drivers/net/designware.h b/drivers/net/designware.h
index e47101ccaf..6b46bafeeb 100644
--- a/drivers/net/designware.h
+++ b/drivers/net/designware.h
@@ -229,11 +229,15 @@ 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 */
--
2.34.1
