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 --- 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 */