This patch add EMAC driver support for H3/A83T/A64 SoCs. Tested on Pine64(A64-External PHY) and Orangepipc(H3-Internal PHY).

BIG Thanks to Andre for providing some of the DT code.

Signed-off-by: Amit Singh Tomar amittomer25@gmail.com --- Changes since v1: * Addressed LABBE's comments. * Made it compatible with External PHY. --- arch/arm/dts/sun50i-a64-pine64-plus.dts | 13 + arch/arm/dts/sun50i-a64.dtsi | 33 ++ arch/arm/dts/sun8i-h3-orangepi-2.dts | 13 + arch/arm/dts/sun8i-h3-orangepi-pc.dts | 12 + arch/arm/dts/sun8i-h3.dtsi | 25 + arch/arm/include/asm/arch-sunxi/clock_sun6i.h | 4 +- arch/arm/include/asm/arch-sunxi/cpu_sun4i.h | 3 +- configs/orangepi_pc_defconfig | 1 + configs/pine64_plus_defconfig | 1 + drivers/net/Kconfig | 9 + drivers/net/Makefile | 1 + drivers/net/sun8i_emac.c | 789 +++++++++++++++++++++++++ 12 files changed, 902 insertions(+), 2 deletions(-) create mode 100644 drivers/net/sun8i_emac.c

diff --git a/arch/arm/dts/sun50i-a64-pine64-plus.dts b/arch/arm/dts/sun50i-a64-pine64-plus.dts index 549dc15..389c609 100644 --- a/arch/arm/dts/sun50i-a64-pine64-plus.dts +++ b/arch/arm/dts/sun50i-a64-pine64-plus.dts @@ -57,3 +57,16 @@ reg = <0x40000000 0x40000000>; }; }; + +&emac { + pinctrl-names = "default"; + pinctrl-0 = <&rgmii_pins>; + phy-mode = "rgmii"; + phy = <&phy1>; + status = "okay"; + + phy1: ethernet-phy@1 { + reg = <1>; + }; +}; + diff --git a/arch/arm/dts/sun50i-a64.dtsi b/arch/arm/dts/sun50i-a64.dtsi index 1bd436f..7d0dc76 100644 --- a/arch/arm/dts/sun50i-a64.dtsi +++ b/arch/arm/dts/sun50i-a64.dtsi @@ -506,6 +506,25 @@ allwinner,drive = <SUN4I_PINCTRL_10_MA>; allwinner,pull = <SUN4I_PINCTRL_NO_PULL>; }; + + rmii_pins: rmii_pins { + allwinner,pins = "PD10", "PD11", "PD13", "PD14", + "PD17", "PD18", "PD19", "PD20", + "PD22", "PD23"; + allwinner,function = "emac"; + allwinner,drive = <SUN4I_PINCTRL_40_MA>; + allwinner,pull = <SUN4I_PINCTRL_NO_PULL>; + }; + + rgmii_pins: rgmii_pins { + allwinner,pins = "PD8", "PD9", "PD10", "PD11", + "PD12", "PD13", "PD15", + "PD16", "PD17", "PD18", "PD19", + "PD20", "PD21", "PD22", "PD23"; + allwinner,function = "emac"; + allwinner,drive = <SUN4I_PINCTRL_40_MA>; + allwinner,pull = <SUN4I_PINCTRL_NO_PULL>; + }; };

ahb_rst: reset@1c202c0 { @@ -620,5 +639,19 @@ #address-cells = <1>; #size-cells = <0>; }; + + emac: ethernet@01c30000 { + compatible = "allwinner,sun50i-a64-emac"; + reg = <0x01c30000 0x2000>, <0x01c00030 0x4>; + reg-names = "emac", "syscon"; + interrupts = <GIC_SPI 82 IRQ_TYPE_LEVEL_HIGH>; + resets = <&ahb_rst 17>; + reset-names = "ahb"; + clocks = <&bus_gates 17>; + clock-names = "ahb"; + status = "disabled"; + #address-cells = <1>; + #size-cells = <0>; + }; }; }; diff --git a/arch/arm/dts/sun8i-h3-orangepi-2.dts b/arch/arm/dts/sun8i-h3-orangepi-2.dts index f93f5d1..d3f8f55 100644 --- a/arch/arm/dts/sun8i-h3-orangepi-2.dts +++ b/arch/arm/dts/sun8i-h3-orangepi-2.dts @@ -184,3 +184,16 @@ usb1_vbus-supply = <&reg_usb1_vbus>; status = "okay"; }; + +&emac { + pinctrl-names = "default"; + pinctrl-0 = <&rgmii_pins>; + phy-mode = "rgmii"; + phy = <&phy1>; + status = "okay"; + + phy1: ethernet-phy@1 { + reg = <1>; + }; +}; + diff --git a/arch/arm/dts/sun8i-h3-orangepi-pc.dts b/arch/arm/dts/sun8i-h3-orangepi-pc.dts index 30ccca0..0a74a91 100644 --- a/arch/arm/dts/sun8i-h3-orangepi-pc.dts +++ b/arch/arm/dts/sun8i-h3-orangepi-pc.dts @@ -173,3 +173,15 @@ /* USB VBUS is always on */ status = "okay"; }; + +&emac { + phy = <&phy1>; + phy-mode = "mii"; + allwinner,use-internal-phy; + allwinner,leds-active-low; + status = "okay"; + + phy1: ethernet-phy@1 { + reg = <1>; + }; +}; diff --git a/arch/arm/dts/sun8i-h3.dtsi b/arch/arm/dts/sun8i-h3.dtsi index c2f63c5..6ca5e34 100644 --- a/arch/arm/dts/sun8i-h3.dtsi +++ b/arch/arm/dts/sun8i-h3.dtsi @@ -501,6 +501,17 @@ interrupt-controller; #interrupt-cells = <3>;

+ rgmii_pins: rgmii_pins { + allwinner,pins = "PD0", "PD1", "PD2", "PD3", + "PD4", "PD5", "PD7", + "PD8", "PD9", "PD10", + "PD12", "PD13", "PD15", + "PD16", "PD17"; + allwinner,function = "emac"; + allwinner,drive = <SUN4I_PINCTRL_40_MA>; + allwinner,pull = <SUN4I_PINCTRL_NO_PULL>; + }; + uart0_pins_a: uart0@0 { allwinner,pins = "PA4", "PA5"; allwinner,function = "uart0"; @@ -616,6 +627,20 @@ status = "disabled"; };

+ emac: ethernet@01c30000 { + compatible = "allwinner,sun8i-h3-emac"; + reg = <0x01c30000 0x2000>, <0x01c00030 0x4>; + reg-names = "emac", "syscon"; + interrupts = <GIC_SPI 82 IRQ_TYPE_LEVEL_HIGH>; + resets = <&ahb_rst 17>, <&ahb_rst 66>; + reset-names = "ahb", "ephy"; + clocks = <&bus_gates 17>, <&bus_gates 128>; + clock-names = "ahb", "ephy"; + #address-cells = <1>; + #size-cells = <0>; + status = "disabled"; + }; + gic: interrupt-controller@01c81000 { compatible = "arm,cortex-a7-gic", "arm,cortex-a15-gic"; reg = <0x01c81000 0x1000>, diff --git a/arch/arm/include/asm/arch-sunxi/clock_sun6i.h b/arch/arm/include/asm/arch-sunxi/clock_sun6i.h index c2e72f5..d4dff1e 100644 --- a/arch/arm/include/asm/arch-sunxi/clock_sun6i.h +++ b/arch/arm/include/asm/arch-sunxi/clock_sun6i.h @@ -40,7 +40,8 @@ struct sunxi_ccm_reg { u32 ahb_gate1; /* 0x64 ahb module clock gating 1 */ u32 apb1_gate; /* 0x68 apb1 module clock gating */ u32 apb2_gate; /* 0x6c apb2 module clock gating */ - u32 reserved9[4]; + u32 bus_gate4; /* 0x70 gate 4 module clock gating */ + u8 res3[0xc]; u32 nand0_clk_cfg; /* 0x80 nand0 clock control */ u32 nand1_clk_cfg; /* 0x84 nand1 clock control */ u32 sd0_clk_cfg; /* 0x88 sd0 clock control */ @@ -387,6 +388,7 @@ struct sunxi_ccm_reg { #define AHB_RESET_OFFSET_LCD0 4

/* ahb_reset2 offsets */ +#define AHB_RESET_OFFSET_EPHY 2 #define AHB_RESET_OFFSET_LVDS 0

/* apb2 reset */ diff --git a/arch/arm/include/asm/arch-sunxi/cpu_sun4i.h b/arch/arm/include/asm/arch-sunxi/cpu_sun4i.h index c5e9d88..cd009d7 100644 --- a/arch/arm/include/asm/arch-sunxi/cpu_sun4i.h +++ b/arch/arm/include/asm/arch-sunxi/cpu_sun4i.h @@ -87,7 +87,8 @@ #define SUNXI_KEYPAD_BASE 0x01c23000 #define SUNXI_TZPC_BASE 0x01c23400

-#if defined(CONFIG_MACH_SUN8I_A83T) || defined(CONFIG_MACH_SUN8I_H3) +#if defined(CONFIG_MACH_SUN8I_A83T) || defined(CONFIG_MACH_SUN8I_H3) || \ +defined(CONFIG_MACH_SUN50I) /* SID address space starts at 0x01c1400, but e-fuse is at offset 0x200 */ #define SUNXI_SID_BASE 0x01c14200 #else diff --git a/configs/orangepi_pc_defconfig b/configs/orangepi_pc_defconfig index 7eaa795..294f7ab 100644 --- a/configs/orangepi_pc_defconfig +++ b/configs/orangepi_pc_defconfig @@ -13,3 +13,4 @@ CONFIG_SPL=y # CONFIG_CMD_FPGA is not set CONFIG_SY8106A_POWER=y CONFIG_USB_EHCI_HCD=y +CONFIG_SUN8I_EMAC=y diff --git a/configs/pine64_plus_defconfig b/configs/pine64_plus_defconfig index 0bf79bf..5c97de1 100644 --- a/configs/pine64_plus_defconfig +++ b/configs/pine64_plus_defconfig @@ -10,3 +10,4 @@ CONFIG_DEFAULT_DEVICE_TREE="sun50i-a64-pine64-plus" # CONFIG_CMD_FLASH is not set # CONFIG_CMD_FPGA is not set CONFIG_ENABLE_ARM_SOC_BOOT0_HOOK=y +CONFIG_SUN8I_EMAC=y diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig index c1cb689..88d8e83 100644 --- a/drivers/net/Kconfig +++ b/drivers/net/Kconfig @@ -152,6 +152,15 @@ config RTL8169 This driver supports Realtek 8169 series gigabit ethernet family of PCI/PCIe chipsets/adapters.

+config SUN8I_EMAC + bool "Allwinner Sun8i Ethernet MAC support" + depends on DM_ETH + select PHYLIB + help + This driver supports the Allwinner based SUN8I/SUN50I Ethernet MAC. + It can be found in H3/A64/A83T based SoCs and compatible with both + External and Internal PHY's. + config XILINX_AXIEMAC depends on DM_ETH && (MICROBLAZE || ARCH_ZYNQ || ARCH_ZYNQMP) select PHYLIB diff --git a/drivers/net/Makefile b/drivers/net/Makefile index 5702592..a448526 100644 --- a/drivers/net/Makefile +++ b/drivers/net/Makefile @@ -24,6 +24,7 @@ obj-$(CONFIG_E1000) += e1000.o obj-$(CONFIG_E1000_SPI) += e1000_spi.o obj-$(CONFIG_EEPRO100) += eepro100.o obj-$(CONFIG_SUNXI_EMAC) += sunxi_emac.o +obj-$(CONFIG_SUN8I_EMAC) += sun8i_emac.o obj-$(CONFIG_ENC28J60) += enc28j60.o obj-$(CONFIG_EP93XX) += ep93xx_eth.o obj-$(CONFIG_ETHOC) += ethoc.o diff --git a/drivers/net/sun8i_emac.c b/drivers/net/sun8i_emac.c new file mode 100644 index 0000000..4bed50d --- /dev/null +++ b/drivers/net/sun8i_emac.c @@ -0,0 +1,789 @@ +/* + * (C) Copyright 2016 + * Author: Amit Singh Tomar, amittomer25@gmail.com + * + * SPDX-License-Identifier: GPL-2.0+ + * + * Ethernet driver for H3/A64/A83T based SoC's + * + * It is derived from the work done by + * LABBE Corentin & Chen-Yu Tsai for Linux, THANKS! + * +*/ + +#include <asm/io.h> +#include <asm/arch/clock.h> +#include <asm/arch/gpio.h> +#include <common.h> +#include <dm.h> +#include <fdt_support.h> +#include <linux/err.h> +#include <malloc.h> +#include <miiphy.h> +#include <net.h> + +#define SCTL_EMAC_TX_CLK_SRC_MII BIT(0) +#define SCTL_EMAC_EPIT_MII BIT(2) +#define SCTL_EMAC_CLK_SEL BIT(18) /* 25 Mhz */ + +#define MDIO_CMD_MII_BUSY BIT(0) +#define MDIO_CMD_MII_WRITE BIT(1) + +#define MDIO_CMD_MII_PHY_REG_ADDR_MASK 0x000001f0 +#define MDIO_CMD_MII_PHY_REG_ADDR_SHIFT 4 +#define MDIO_CMD_MII_PHY_ADDR_MASK 0x0001f000 +#define MDIO_CMD_MII_PHY_ADDR_SHIFT 12 + +#define CONFIG_TX_DESCR_NUM 32 +#define CONFIG_RX_DESCR_NUM 32 +#define CONFIG_ETH_BUFSIZE 2024 + +#define TX_TOTAL_BUFSIZE (CONFIG_ETH_BUFSIZE * CONFIG_TX_DESCR_NUM) +#define RX_TOTAL_BUFSIZE (CONFIG_ETH_BUFSIZE * CONFIG_RX_DESCR_NUM) + +#define H3_EPHY_DEFAULT_VALUE 0x58000 +#define H3_EPHY_DEFAULT_MASK GENMASK(31, 15) +#define H3_EPHY_ADDR_SHIFT 20 +#define REG_PHY_ADDR_MASK GENMASK(4, 0) +#define H3_EPHY_LED_POL BIT(17) /* 1: active low, 0: active high */ +#define H3_EPHY_SHUTDOWN BIT(16) /* 1: shutdown, 0: power up */ +#define H3_EPHY_SELECT BIT(15) /* 1: internal PHY, 0: external PHY */ + +#define SC_RMII_EN BIT(13) +#define SC_EPIT BIT(2) /* 1: RGMII, 0: MII */ +#define SC_ETCS_MASK GENMASK(1, 0) +#define SC_ETCS_EXT_GMII 0x1 +#define SC_ETCS_INT_GMII 0x2 + +#define CONFIG_MDIO_TIMEOUT (3 * CONFIG_SYS_HZ) + +#define AHB_GATE_OFFSET_EPHY 0 + +#if defined(CONFIG_MACH_SUN8I_H3) +#define SUN8I_GPD8_GMAC 2 +#else +#define SUN8I_GPD8_GMAC 4 +#endif + +/* H3/A64 EMAC Register's offset */ +#define EMAC_CTL0 0x00 +#define EMAC_CTL1 0x04 +#define EMAC_INT_STA 0x08 +#define EMAC_INT_EN 0x0c +#define EMAC_TX_CTL0 0x10 +#define EMAC_TX_CTL1 0x14 +#define EMAC_TX_FLOW_CTL 0x1c +#define EMAC_TX_DMA_DESC 0x20 +#define EMAC_RX_CTL0 0x24 +#define EMAC_RX_CTL1 0x28 +#define EMAC_RX_DMA_DESC 0x34 +#define EMAC_MII_CMD 0x48 +#define EMAC_MII_DATA 0x4c +#define EMAC_ADDR0_HIGH 0x50 +#define EMAC_ADDR0_LOW 0x54 +#define EMAC_TX_DMA_STA 0xb0 +#define EMAC_TX_CUR_DESC 0xb4 +#define EMAC_TX_CUR_BUF 0xb8 +#define EMAC_RX_DMA_STA 0xc0 +#define EMAC_RX_CUR_DESC 0xc4 + +DECLARE_GLOBAL_DATA_PTR; + +enum emac_variant { + A83T_EMAC = 1, + H3_EMAC, + A64_EMAC, +}; + +struct emac_dma_desc { + u32 status; + u32 st; + u32 buf_addr; + u32 next; +} __aligned(ARCH_DMA_MINALIGN); + +struct emac_eth_dev { + struct emac_dma_desc rx_chain[CONFIG_TX_DESCR_NUM]; + struct emac_dma_desc tx_chain[CONFIG_RX_DESCR_NUM]; + char rxbuffer[RX_TOTAL_BUFSIZE] __aligned(ARCH_DMA_MINALIGN); + char txbuffer[TX_TOTAL_BUFSIZE] __aligned(ARCH_DMA_MINALIGN); + + u32 interface; + u32 phyaddr; + u32 link; + u32 speed; + u32 duplex; + u32 phy_configured; + u32 tx_currdescnum; + u32 rx_currdescnum; + u32 addr; + u32 tx_slot; + bool use_internal_phy; + + enum emac_variant variant; + void *mac_reg; + phys_addr_t sysctl_reg; + struct phy_device *phydev; + struct mii_dev *bus; +}; + +static int sun8i_mdio_read(struct mii_dev *bus, int addr, int devad, int reg) +{ + struct emac_eth_dev *priv = bus->priv; + ulong start; + u32 miiaddr = 0; + int timeout = CONFIG_MDIO_TIMEOUT; + + miiaddr &= ~MDIO_CMD_MII_WRITE; + miiaddr &= ~MDIO_CMD_MII_PHY_REG_ADDR_MASK; + miiaddr |= (reg << MDIO_CMD_MII_PHY_REG_ADDR_SHIFT) & + MDIO_CMD_MII_PHY_REG_ADDR_MASK; + + miiaddr &= ~MDIO_CMD_MII_PHY_ADDR_MASK; + + miiaddr |= (addr << MDIO_CMD_MII_PHY_ADDR_SHIFT) & + MDIO_CMD_MII_PHY_ADDR_MASK; + + miiaddr |= MDIO_CMD_MII_BUSY; + + writel(miiaddr, priv->mac_reg + EMAC_MII_CMD); + + start = get_timer(0); + while (get_timer(start) < timeout) { + if (!(readl(priv->mac_reg + EMAC_MII_CMD) & MDIO_CMD_MII_BUSY)) + return readl(priv->mac_reg + EMAC_MII_DATA); + udelay(10); + }; + + return -1; +} + +static int sun8i_mdio_write(struct mii_dev *bus, int addr, int devad, int reg, + u16 val) +{ + struct emac_eth_dev *priv = bus->priv; + ulong start; + u32 miiaddr = 0; + int ret = -1, timeout = CONFIG_MDIO_TIMEOUT; + + miiaddr &= ~MDIO_CMD_MII_PHY_REG_ADDR_MASK; + miiaddr |= (reg << MDIO_CMD_MII_PHY_REG_ADDR_SHIFT) & + MDIO_CMD_MII_PHY_REG_ADDR_MASK; + + miiaddr &= ~MDIO_CMD_MII_PHY_ADDR_MASK; + miiaddr |= (addr << MDIO_CMD_MII_PHY_ADDR_SHIFT) & + MDIO_CMD_MII_PHY_ADDR_MASK; + + miiaddr |= MDIO_CMD_MII_WRITE; + miiaddr |= MDIO_CMD_MII_BUSY; + + writel(miiaddr, priv->mac_reg + EMAC_MII_CMD); + writel(val, priv->mac_reg + EMAC_MII_DATA); + + start = get_timer(0); + while (get_timer(start) < timeout) { + if (!(readl(priv->mac_reg + EMAC_MII_CMD) & + MDIO_CMD_MII_BUSY)) { + ret = 0; + break; + } + udelay(10); + }; + + return ret; +} + +static int _sun8i_write_hwaddr(struct emac_eth_dev *priv, u8 *mac_id) +{ + u32 macid_lo, macid_hi; + + macid_lo = mac_id[0] + (mac_id[1] << 8) + (mac_id[2] << 16) + + (mac_id[3] << 24); + macid_hi = mac_id[4] + (mac_id[5] << 8); + + writel(macid_hi, priv->mac_reg + EMAC_ADDR0_HIGH); + writel(macid_lo, priv->mac_reg + EMAC_ADDR0_LOW); + + return 0; +} + +static void sun8i_adjust_link(struct emac_eth_dev *priv, + struct phy_device *phydev) +{ + u32 v; + + v = readl(priv->mac_reg + EMAC_CTL0); + + if (phydev->duplex) + v |= BIT(0); + else + v &= ~BIT(0); + + v &= ~0x0C; + + switch (phydev->speed) { + case 1000: + break; + case 100: + v |= BIT(2); + v |= BIT(3); + break; + case 10: + v |= BIT(3); + break; + } + writel(v, priv->mac_reg + EMAC_CTL0); +} + +static int sun8i_emac_set_syscon_ephy(struct emac_eth_dev *priv, u32 *reg) +{ + if (priv->use_internal_phy) { + /* H3 based SoC's that has an Internal 100MBit PHY + * needs to be configured and powered up before use + */ + *reg &= ~H3_EPHY_DEFAULT_MASK; + *reg |= H3_EPHY_DEFAULT_VALUE; + *reg |= priv->phyaddr << H3_EPHY_ADDR_SHIFT; + *reg &= ~H3_EPHY_SHUTDOWN; + *reg |= H3_EPHY_SELECT; + } else + /* This is to select External Gigabit PHY on + * the boards with H3 SoC. + */ + *reg &= ~H3_EPHY_SELECT; + + return 0; +} + +static int sun8i_emac_set_syscon(struct emac_eth_dev *priv) +{ + int ret; + u32 reg; + + reg = readl(priv->sysctl_reg); + + if (priv->variant == H3_EMAC) { + ret = sun8i_emac_set_syscon_ephy(priv, &reg); + if (ret) + return ret; + } + + reg &= ~(SC_ETCS_MASK | SC_EPIT); + if (priv->variant == H3_EMAC || priv->variant == A64_EMAC) + reg &= ~SC_RMII_EN; + + switch (priv->interface) { + case PHY_INTERFACE_MODE_MII: + /* default */ + break; + case PHY_INTERFACE_MODE_RGMII: + reg |= SC_EPIT | SC_ETCS_INT_GMII; + break; + case PHY_INTERFACE_MODE_RMII: + if (priv->variant == H3_EMAC || + priv->variant == A64_EMAC) { + reg |= SC_RMII_EN | SC_ETCS_EXT_GMII; + break; + } + /* RMII not supported on A83T */ + default: + debug("%s: Invalid PHY interface\n", __func__); + return -EINVAL; + } + + writel(reg, priv->sysctl_reg); + + return 0; +} + +static int sun8i_phy_init(struct emac_eth_dev *priv, void *dev) +{ + struct phy_device *phydev; + + phydev = phy_connect(priv->bus, priv->phyaddr, dev, priv->interface); + if (!phydev) + return -ENODEV; + + phy_connect_dev(phydev, dev); + + priv->phydev = phydev; + phy_config(priv->phydev); + + return 0; +} + +static void rx_descs_init(struct emac_eth_dev *priv) +{ + struct emac_dma_desc *desc_table_p = &priv->rx_chain[0]; + char *rxbuffs = &priv->rxbuffer[0]; + struct emac_dma_desc *desc_p; + u32 idx; + + /* flush Rx buffers */ + flush_dcache_range((uintptr_t)rxbuffs, (ulong)rxbuffs + + RX_TOTAL_BUFSIZE); + + for (idx = 0; idx < CONFIG_RX_DESCR_NUM; idx++) { + desc_p = &desc_table_p[idx]; + desc_p->buf_addr = (uintptr_t)&rxbuffs[idx * CONFIG_ETH_BUFSIZE] + ; + desc_p->next = (uintptr_t)&desc_table_p[idx + 1]; + desc_p->st |= CONFIG_ETH_BUFSIZE; + desc_p->status = BIT(31); + } + + /* Correcting the last pointer of the chain */ + desc_p->next = (uintptr_t)&desc_table_p[0]; + + flush_dcache_range((uintptr_t)priv->rx_chain, + (uintptr_t)priv->rx_chain + + sizeof(priv->rx_chain)); + + writel((uintptr_t)&desc_table_p[0], (priv->mac_reg + EMAC_RX_DMA_DESC)); + priv->rx_currdescnum = 0; +} + +static void tx_descs_init(struct emac_eth_dev *priv) +{ + struct emac_dma_desc *desc_table_p = &priv->tx_chain[0]; + char *txbuffs = &priv->txbuffer[0]; + struct emac_dma_desc *desc_p; + u32 idx; + + for (idx = 0; idx < CONFIG_TX_DESCR_NUM; idx++) { + desc_p = &desc_table_p[idx]; + desc_p->buf_addr = (uintptr_t)&txbuffs[idx * CONFIG_ETH_BUFSIZE] + ; + desc_p->next = (uintptr_t)&desc_table_p[idx + 1]; + desc_p->status = (1 << 31); + desc_p->st = 0; + } + + /* Correcting the last pointer of the chain */ + desc_p->next = (uintptr_t)&desc_table_p[0]; + + /* Flush all Tx buffer descriptors */ + flush_dcache_range((uintptr_t)priv->tx_chain, + (uintptr_t)priv->tx_chain + + sizeof(priv->tx_chain)); + + writel((uintptr_t)&desc_table_p[0], priv->mac_reg + EMAC_TX_DMA_DESC); + priv->tx_currdescnum = 0; +} + +static int _sun8i_emac_eth_init(struct emac_eth_dev *priv, u8 *enetaddr) +{ + u32 reg, v; + int timeout = 100; + + reg = readl((priv->mac_reg + EMAC_CTL1)); + + if (!(reg & 0x1)) { + /* Soft reset MAC */ + setbits_le32((priv->mac_reg + EMAC_CTL1), 0x1); + do { + reg = readl(priv->mac_reg + EMAC_CTL1); + } while ((reg & 0x01) != 0 && (--timeout)); + if (!timeout) { + printf("%s: Timeout\n", __func__); + return -1; + } + } + + /* Rewrite mac address after reset */ + _sun8i_write_hwaddr(priv, enetaddr); + + v = readl(priv->mac_reg + EMAC_TX_CTL1); + /* TX_MD Transmission starts after a full frame located in TX DMA FIFO*/ + v |= BIT(1); + writel(v, priv->mac_reg + EMAC_TX_CTL1); + + v = readl(priv->mac_reg + EMAC_RX_CTL1); + /* RX_MD RX DMA reads data from RX DMA FIFO to host memory after a + * complete frame has been written to RX DMA FIFO + */ + v |= BIT(1); + writel(v, priv->mac_reg + EMAC_RX_CTL1); + + /* DMA */ + writel(8 << 24, priv->mac_reg + EMAC_CTL1); + + /* Initialize rx/tx descriptors */ + rx_descs_init(priv); + tx_descs_init(priv); + + /* PHY Start Up */ + genphy_parse_link(priv->phydev); + + sun8i_adjust_link(priv, priv->phydev); + + /* Start RX DMA */ + v = readl(priv->mac_reg + EMAC_RX_CTL1); + v |= BIT(30); + writel(v, priv->mac_reg + EMAC_RX_CTL1); + /* Start TX DMA */ + v = readl(priv->mac_reg + EMAC_TX_CTL1); + v |= BIT(30); + writel(v, priv->mac_reg + EMAC_TX_CTL1); + + /* Enable RX/TX */ + setbits_le32(priv->mac_reg + EMAC_RX_CTL0, BIT(31)); + setbits_le32(priv->mac_reg + EMAC_TX_CTL0, BIT(31)); + + return 0; +} + +static int parse_phy_pins(struct udevice *dev) +{ + int offset; + const char *pin_name; + int drive, pull, i; + + offset = fdtdec_lookup_phandle(gd->fdt_blob, dev->of_offset, + "pinctrl-0"); + if (offset < 0) { + printf("WARNING: emac: cannot find pinctrl-0 node\n"); + return offset; + } + + drive = fdt_getprop_u32_default_node(gd->fdt_blob, offset, 0, + "allwinner,drive", 4); + pull = fdt_getprop_u32_default_node(gd->fdt_blob, offset, 0, + "allwinner,pull", 0); + for (i = 0; ; i++) { + int pin; + + if (fdt_get_string_index(gd->fdt_blob, offset, + "allwinner,pins", i, &pin_name)) + break; + if (pin_name[0] != 'P') + continue; + pin = (pin_name[1] - 'A') << 5; + if (pin >= 26 << 5) + continue; + pin += simple_strtol(&pin_name[2], NULL, 10); + + sunxi_gpio_set_cfgpin(pin, SUN8I_GPD8_GMAC); + sunxi_gpio_set_drv(pin, drive); + sunxi_gpio_set_pull(pin, pull); + } + + if (!i) { + printf("WARNING: emac: cannot find allwinner,pins property\n"); + return -2; + } + + return 0; +} + +static int _sun8i_eth_recv(struct emac_eth_dev *priv, uchar **packetp) +{ + u32 status, desc_num = priv->rx_currdescnum; + struct emac_dma_desc *desc_p = &priv->rx_chain[desc_num]; + int length = -EAGAIN; + int good_packet = 1; + uintptr_t desc_start = (uintptr_t)desc_p; + uintptr_t desc_end = desc_start + + roundup(sizeof(*desc_p), ARCH_DMA_MINALIGN); + + ulong data_start = (uintptr_t)desc_p->buf_addr; + ulong data_end; + + /* Invalidate entire buffer descriptor */ + invalidate_dcache_range(desc_start, desc_end); + + status = desc_p->status; + + /* Check for DMA own bit */ + if (!(status & BIT(31))) { + length = (desc_p->status >> 16) & 0x3FFF; + + if (length < 0x40) { + good_packet = 0; + debug("RX: Bad Packet (runt)\n"); + } + + data_end = data_start + length; + /* Invalidate received data */ + invalidate_dcache_range(rounddown(data_start, + ARCH_DMA_MINALIGN), + roundup(data_end, + ARCH_DMA_MINALIGN)); + if (good_packet) { + if (length > CONFIG_ETH_BUFSIZE) { + printf("Received packet is too big (len=%d)\n", + length); + return -EMSGSIZE; + } + *packetp = (uchar *)(ulong)desc_p->buf_addr; + return length; + } + } + + return length; +} + +static int _sun8i_emac_eth_send(struct emac_eth_dev *priv, void *packet, + int len) +{ + u32 v, desc_num = priv->tx_currdescnum; + struct emac_dma_desc *desc_p = &priv->tx_chain[desc_num]; + uintptr_t desc_start = (uintptr_t)desc_p; + uintptr_t desc_end = desc_start + + roundup(sizeof(*desc_p), ARCH_DMA_MINALIGN); + + uintptr_t data_start = (uintptr_t)desc_p->buf_addr; + uintptr_t data_end = data_start + + roundup(len, ARCH_DMA_MINALIGN); + + /* Invalidate entire buffer descriptor */ + invalidate_dcache_range(desc_start, desc_end); + + desc_p->st = len; + /* Mandatory undocumented bit */ + desc_p->st |= BIT(24); + + memcpy((void *)data_start, packet, len); + + /* Flush data to be sent */ + flush_dcache_range(data_start, data_end); + + /* frame end */ + desc_p->st |= BIT(30); + desc_p->st |= BIT(31); + + /*frame begin */ + desc_p->st |= BIT(29); + desc_p->status = BIT(31); + + /*Descriptors st and status field has changed, so FLUSH it */ + flush_dcache_range(desc_start, desc_end); + + /* Move to next Descriptor and wrap around */ + if (++desc_num >= CONFIG_TX_DESCR_NUM) + desc_num = 0; + priv->tx_currdescnum = desc_num; + + /* Start the DMA */ + v = readl(priv->mac_reg + EMAC_TX_CTL1); + v |= BIT(31);/* mandatory */ + v |= BIT(30);/* mandatory */ + writel(v, priv->mac_reg + EMAC_TX_CTL1); + + return 0; +} + +static int sun8i_eth_write_hwaddr(struct udevice *dev) +{ + struct eth_pdata *pdata = dev_get_platdata(dev); + struct emac_eth_dev *priv = dev_get_priv(dev); + + return _sun8i_write_hwaddr(priv, pdata->enetaddr); +} + +static void sun8i_emac_board_setup(struct emac_eth_dev *priv) +{ + struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; + + if (priv->use_internal_phy) { + /* Set clock gating for ephy */ + setbits_le32(&ccm->bus_gate4, BIT(AHB_GATE_OFFSET_EPHY)); + + /* Set Tx clock source as MII with rate 25 MZ */ + setbits_le32(priv->sysctl_reg, SCTL_EMAC_TX_CLK_SRC_MII | + SCTL_EMAC_EPIT_MII | SCTL_EMAC_CLK_SEL); + /* Deassert EPHY */ + setbits_le32(&ccm->ahb_reset2_cfg, BIT(AHB_RESET_OFFSET_EPHY)); + } + + /* Set clock gating for emac */ + setbits_le32(&ccm->ahb_gate0, BIT(AHB_GATE_OFFSET_GMAC)); + + /* Set EMAC clock */ + setbits_le32(&ccm->axi_gate, (BIT(1) | BIT(0))); + + /* De-assert EMAC */ + setbits_le32(&ccm->ahb_reset0_cfg, BIT(AHB_RESET_OFFSET_GMAC)); +} + +static int sun8i_mdio_init(const char *name, struct emac_eth_dev *priv) +{ + struct mii_dev *bus = mdio_alloc(); + + if (!bus) { + debug("Failed to allocate MDIO bus\n"); + return -ENOMEM; + } + + bus->read = sun8i_mdio_read; + bus->write = sun8i_mdio_write; + snprintf(bus->name, sizeof(bus->name), name); + bus->priv = (void *)priv; + + return mdio_register(bus); +} + +static int sun8i_emac_eth_start(struct udevice *dev) +{ + struct eth_pdata *pdata = dev_get_platdata(dev); + + return _sun8i_emac_eth_init(dev->priv, pdata->enetaddr); +} + +static int sun8i_emac_eth_send(struct udevice *dev, void *packet, int length) +{ + struct emac_eth_dev *priv = dev_get_priv(dev); + + return _sun8i_emac_eth_send(priv, packet, length); +} + +static int sun8i_emac_eth_recv(struct udevice *dev, int flags, uchar **packetp) +{ + struct emac_eth_dev *priv = dev_get_priv(dev); + + return _sun8i_eth_recv(priv, packetp); +} + +static int _sun8i_free_pkt(struct emac_eth_dev *priv) +{ + u32 desc_num = priv->rx_currdescnum; + struct emac_dma_desc *desc_p = &priv->rx_chain[desc_num]; + uintptr_t desc_start = (uintptr_t)desc_p; + uintptr_t desc_end = desc_start + + roundup(sizeof(u32), ARCH_DMA_MINALIGN); + + /* Make the current descriptor valid again */ + desc_p->status |= BIT(31); + + /* Flush Status field of descriptor */ + flush_dcache_range(desc_start, desc_end); + + /* Move to next desc and wrap-around condition. */ + if (++desc_num >= CONFIG_RX_DESCR_NUM) + desc_num = 0; + priv->rx_currdescnum = desc_num; + + return 0; +} + +static int sun8i_eth_free_pkt(struct udevice *dev, uchar *packet, + int length) +{ + struct emac_eth_dev *priv = dev_get_priv(dev); + + return _sun8i_free_pkt(priv); +} + +static void sun8i_emac_eth_stop(struct udevice *dev) +{ + struct emac_eth_dev *priv = dev_get_priv(dev); + + /* Stop Rx/Tx transmitter */ + clrbits_le32(priv->mac_reg + EMAC_RX_CTL0, BIT(31)); + clrbits_le32(priv->mac_reg + EMAC_TX_CTL0, BIT(31)); + + /* Stop TX DMA */ + clrbits_le32(priv->mac_reg + EMAC_TX_CTL1, BIT(30)); + + phy_shutdown(priv->phydev); +} + +static int sun8i_emac_eth_probe(struct udevice *dev) +{ + struct eth_pdata *pdata = dev_get_platdata(dev); + struct emac_eth_dev *priv = dev_get_priv(dev); + + priv->mac_reg = (void *)pdata->iobase; + + sun8i_emac_board_setup(priv); + + sun8i_mdio_init(dev->name, priv); + priv->bus = miiphy_get_dev_by_name(dev->name); + + sun8i_emac_set_syscon(priv); + + return sun8i_phy_init(priv, dev); +} + +static const struct eth_ops sun8i_emac_eth_ops = { + .start = sun8i_emac_eth_start, + .write_hwaddr = sun8i_eth_write_hwaddr, + .send = sun8i_emac_eth_send, + .recv = sun8i_emac_eth_recv, + .free_pkt = sun8i_eth_free_pkt, + .stop = sun8i_emac_eth_stop, +}; + +static int sun8i_emac_eth_ofdata_to_platdata(struct udevice *dev) +{ + struct eth_pdata *pdata = dev_get_platdata(dev); + struct emac_eth_dev *priv = dev_get_priv(dev); + const char *phy_mode; + int offset = 0; + + pdata->iobase = dev_get_addr_name(dev, "emac"); + priv->sysctl_reg = dev_get_addr_name(dev, "syscon"); + + pdata->phy_interface = -1; + priv->phyaddr = -1; + priv->use_internal_phy = false; + + offset = fdtdec_lookup_phandle(gd->fdt_blob, dev->of_offset, + "phy"); + if (offset > 0) + priv->phyaddr = fdtdec_get_int(gd->fdt_blob, offset, "reg", + -1); + + phy_mode = fdt_getprop(gd->fdt_blob, dev->of_offset, "phy-mode", NULL); + + if (phy_mode) + pdata->phy_interface = phy_get_interface_by_name(phy_mode); + printf("phy interface%d\n", pdata->phy_interface); + + if (pdata->phy_interface == -1) { + debug("%s: Invalid PHY interface '%s'\n", __func__, phy_mode); + return -EINVAL; + } + + priv->variant = dev_get_driver_data(dev); + + if (!priv->variant) { + printf("%s: Missing variant '%s'\n", __func__, + (char *)priv->variant); + return -EINVAL; + } + + if (priv->variant == H3_EMAC) { + if (fdt_getprop(gd->fdt_blob, dev->of_offset, + "allwinner,use-internal-phy", NULL)) + priv->use_internal_phy = true; + } + + priv->interface = pdata->phy_interface; + + if (!priv->use_internal_phy) + parse_phy_pins(dev); + + return 0; +} + +static const struct udevice_id sun8i_emac_eth_ids[] = { + {.compatible = "allwinner,sun8i-h3-emac", .data = (uintptr_t)H3_EMAC }, + {.compatible = "allwinner,sun50i-a64-emac", + .data = (uintptr_t)A64_EMAC }, + {.compatible = "allwinner,sun8i-a83t-emac", + .data = (uintptr_t)A83T_EMAC }, + { } +}; + +U_BOOT_DRIVER(eth_sun8i_emac) = { + .name = "eth_sun8i_emac", + .id = UCLASS_ETH, + .of_match = sun8i_emac_eth_ids, + .ofdata_to_platdata = sun8i_emac_eth_ofdata_to_platdata, + .probe = sun8i_emac_eth_probe, + .ops = &sun8i_emac_eth_ops, + .priv_auto_alloc_size = sizeof(struct emac_eth_dev), + .platdata_auto_alloc_size = sizeof(struct eth_pdata), + .flags = DM_FLAG_ALLOC_PRIV_DMA, +};