Add ethernet driver for the AR71xx and AR9xxx Atheros MIPS machines.

Signed-off-by: Marek Vasut marex@denx.de Cc: Daniel Schwierzeck daniel.schwierzeck@gmail.com Cc: Joe Hershberger joe.hershberger@ni.com Cc: Wills Wang wills.wang@live.com --- arch/mips/dts/ap121.dts | 8 + arch/mips/dts/ar933x.dtsi | 16 + arch/mips/mach-ath79/cpu.c | 47 +++ configs/ap121_defconfig | 1 + drivers/net/Kconfig | 9 + drivers/net/Makefile | 1 + drivers/net/ag7xxx.c | 794 +++++++++++++++++++++++++++++++++++++++++++++ 7 files changed, 876 insertions(+) create mode 100644 drivers/net/ag7xxx.c

NOTE: This is RFC patch, it is by no means a standard submission, but it should give you some starting point for the ethernet driver. NOTE: The driver works and I can transfer data via TFTP, but this patch needs splitting and cleanup. Some FIXMEs need to be sorted out of course. NOTE: This is only tested on ar9331.

diff --git a/arch/mips/dts/ap121.dts b/arch/mips/dts/ap121.dts index 00bdd8b..337ae8f 100644 --- a/arch/mips/dts/ap121.dts +++ b/arch/mips/dts/ap121.dts @@ -21,6 +21,14 @@ }; };

+&gmac0 { + status = "okay"; +}; + +&gmac1 { + status = "okay"; +}; + &xtal { clock-frequency = <25000000>; }; diff --git a/arch/mips/dts/ar933x.dtsi b/arch/mips/dts/ar933x.dtsi index a75e173..f71a31f 100644 --- a/arch/mips/dts/ar933x.dtsi +++ b/arch/mips/dts/ar933x.dtsi @@ -62,6 +62,22 @@

status = "disabled"; }; + + gmac0: eth@0x19000000 { + compatible = "qca,ag7240-mac"; + reg = <0x19000000 0x200>; + phy-mode = "rmii"; + + status = "disabled"; + }; + + gmac1: eth@0x1a000000 { + compatible = "qca,ag7240-mac"; + reg = <0x1a000000 0x200>; + phy-mode = "rgmii"; + + status = "disabled"; + }; };

spi0: spi@1f000000 { diff --git a/arch/mips/mach-ath79/cpu.c b/arch/mips/mach-ath79/cpu.c index d8910a0..3b41a90 100644 --- a/arch/mips/mach-ath79/cpu.c +++ b/arch/mips/mach-ath79/cpu.c @@ -201,3 +201,50 @@ int print_cpuinfo(void)

return 0; } + +/* + * Un-reset ethernet. DM still doesn't have any notion of reset + * framework, so we do it by hand here. + */ +#define AR7240_RESET 0xb806001c +#define AR7240_BOOTSTRAP_STATUS 0xb80600ac +#define AR7240_S26_CLK_CTRL_OFFSET 0xb8050024 + +#define AR7240_RESET_GE1_PHY BIT(/*23*/12) +#define AR7240_RESET_GE0_PHY BIT(/*22*/8) +#define AR7240_RESET_GE1_MAC BIT(13) +#define AR7240_RESET_GE0_MAC BIT(9) + +int cpu_eth_init(bd_t *bis) +{ + /* Clear MDIO slave mask */ + clrbits_be32((void *)AR7240_BOOTSTRAP_STATUS, 0x00020000); + + mdelay(10); + + /* Get Atheros S26 PHY out of reset */ + clrsetbits_be32((void *)AR7240_S26_CLK_CTRL_OFFSET, 0x1f, 0x10); + + mdelay(10); + + setbits_be32((void *)AR7240_RESET, + AR7240_RESET_GE0_MAC | AR7240_RESET_GE0_PHY | + AR7240_RESET_GE1_MAC | AR7240_RESET_GE1_PHY); + + mdelay(10); + + clrbits_be32((void *)AR7240_RESET, + AR7240_RESET_GE0_MAC | AR7240_RESET_GE0_PHY | + AR7240_RESET_GE1_MAC | AR7240_RESET_GE1_PHY); + + mdelay(10); + + /* We support S26 PHY only */ +/* reg = readl((void *)priv->gmac_reg + AG7XXX_GMAC_ETH_CFG); + reg &= ~(0x3 << 3); + reg |= AG7XXX_ETH_CFG_MII_GE0_SLAVE; + writel(reg, (void *)priv->gmac_reg + AG7XXX_GMAC_ETH_CFG); +*/ + + return 0; +} diff --git a/configs/ap121_defconfig b/configs/ap121_defconfig index 0e2c7e8..7b76429 100644 --- a/configs/ap121_defconfig +++ b/configs/ap121_defconfig @@ -29,6 +29,7 @@ CONFIG_DM_USB=y CONFIG_USB_EHCI_HCD=y CONFIG_USB_EHCI_GENERIC=y CONFIG_USB_STORAGE=y +CONFIG_AG7XXX=y CONFIG_SPI_FLASH=y CONFIG_SPI_FLASH_BAR=y CONFIG_SPI_FLASH_WINBOND=y diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig index de54ca8..5a5a954 100644 --- a/drivers/net/Kconfig +++ b/drivers/net/Kconfig @@ -25,6 +25,15 @@ menuconfig NETDEVICES

if NETDEVICES

+config AG7XXX + bool "Atheros AG7xxx Ethernet MAC support" + depends on DM_ETH + select PHYLIB + help + This driver supports the Atheros AG7xxx Ethernet MAC. This MAC is + present in the Atheros AR7xxx, AR9xxx and QCA9xxx MIPS chips. + + config ALTERA_TSE bool "Altera Triple-Speed Ethernet MAC support" depends on DM_ETH diff --git a/drivers/net/Makefile b/drivers/net/Makefile index 150470c..384735a 100644 --- a/drivers/net/Makefile +++ b/drivers/net/Makefile @@ -7,6 +7,7 @@

obj-$(CONFIG_PPC4xx_EMAC) += 4xx_enet.o obj-$(CONFIG_ALTERA_TSE) += altera_tse.o +obj-$(CONFIG_AG7XXX) += ag7xxx.o obj-$(CONFIG_ARMADA100_FEC) += armada100_fec.o obj-$(CONFIG_DRIVER_AT91EMAC) += at91_emac.o obj-$(CONFIG_DRIVER_AX88180) += ax88180.o diff --git a/drivers/net/ag7xxx.c b/drivers/net/ag7xxx.c new file mode 100644 index 0000000..961215a --- /dev/null +++ b/drivers/net/ag7xxx.c @@ -0,0 +1,794 @@ +/* + * Atheros AR71xx / AR9xxx GMAC driver + * + * Copyright (C) 2016 Marek Vasut marex@denx.de + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <dm.h> +#include <errno.h> +#include <miiphy.h> +#include <malloc.h> +#include <linux/compiler.h> +#include <linux/err.h> +#include <linux/mii.h> +#include <asm/io.h> + +DECLARE_GLOBAL_DATA_PTR; + +#define AG7XXX_ETH_CFG1 0x00 +#define AG7XXX_ETH_CFG1_SOFT_RST BIT(31) +#define AG7XXX_ETH_CFG1_RX_RST BIT(19) +#define AG7XXX_ETH_CFG1_TX_RST BIT(18) +#define AG7XXX_ETH_CFG1_LOOPBACK BIT(8) +#define AG7XXX_ETH_CFG1_RX_EN BIT(2) +#define AG7XXX_ETH_CFG1_TX_EN BIT(0) + +#define AG7XXX_ETH_CFG2 0x04 +#define AG7XXX_ETH_CFG2_IF_1000 BIT(9) +#define AG7XXX_ETH_CFG2_IF_10_100 BIT(8) +#define AG7XXX_ETH_CFG2_IF_SPEED_MASK (3 << 8) +#define AG7XXX_ETH_CFG2_HUGE_FRAME_EN BIT(5) +#define AG7XXX_ETH_CFG2_LEN_CHECK BIT(4) +#define AG7XXX_ETH_CFG2_PAD_CRC_EN BIT(2) +#define AG7XXX_ETH_CFG2_FDX BIT(0) + +#define AG7XXX_ETH_MII_MGMT_CFG 0x20 +#define AG7XXX_ETH_MII_MGMT_CFG_RESET BIT(31) + +#define AG7XXX_ETH_MII_MGMT_CMD 0x24 +#define AG7XXX_ETH_MII_MGMT_CMD_READ 0x1 + +#define AG7XXX_ETH_MII_MGMT_ADDRESS 0x28 +#define AG7XXX_ETH_MII_MGMT_ADDRESS_SHIFT 8 + +#define AG7XXX_ETH_MII_MGMT_CTRL 0x2c + +#define AG7XXX_ETH_MII_MGMT_STATUS 0x30 + +#define AG7XXX_ETH_MII_MGMT_IND 0x34 +#define AG7XXX_ETH_MII_MGMT_IND_BUSY BIT(0) +#define AG7XXX_ETH_MII_MGMT_IND_INVALID BIT(2) + +#define AG7XXX_ETH_ADDR1 0x40 +#define AG7XXX_ETH_ADDR2 0x44 + +#define AG7XXX_ETH_FIFO_CFG_0 0x48 +#define AG7XXX_ETH_FIFO_CFG_1 0x4c +#define AG7XXX_ETH_FIFO_CFG_2 0x50 +#define AG7XXX_ETH_FIFO_CFG_3 0x54 +#define AG7XXX_ETH_FIFO_CFG_4 0x58 +#define AG7XXX_ETH_FIFO_CFG_5 0x5c + +#define AG7XXX_ETH_DMA_TX_CTRL 0x180 +#define AG7XXX_ETH_DMA_TX_CTRL_TXE BIT(0) + +#define AG7XXX_ETH_DMA_TX_DESC 0x184 + +#define AG7XXX_ETH_DMA_TX_STATUS 0x188 + +#define AG7XXX_ETH_DMA_RX_CTRL 0x18c +#define AG7XXX_ETH_DMA_RX_CTRL_RXE BIT(0) + +#define AG7XXX_ETH_DMA_RX_DESC 0x190 + +#define AG7XXX_ETH_DMA_RX_STATUS 0x194 + +/* Custom register at 0x18070000 */ +#define AG7XXX_GMAC_ETH_CFG 0x00 +#define AG7XXX_ETH_CFG_SW_PHY_ADDR_SWAP BIT(8) +#define AG7XXX_ETH_CFG_SW_PHY_SWAP BIT(7) +#define AG7XXX_ETH_CFG_SW_ONLY_MODE BIT(6) +#define AG7XXX_ETH_CFG_GE0_ERR_EN BIT(5) +#define AG7XXX_ETH_CFG_MII_GE0_SLAVE BIT(4) +#define AG7XXX_ETH_CFG_MII_GE0_MASTER BIT(3) +#define AG7XXX_ETH_CFG_GMII_GE0 BIT(2) +#define AG7XXX_ETH_CFG_MII_GE0 BIT(1) +#define AG7XXX_ETH_CFG_RGMII_GE0 BIT(0) + +#define CONFIG_TX_DESCR_NUM 8 +#define CONFIG_RX_DESCR_NUM 8 +#define CONFIG_ETH_BUFSIZE 2048 +#define TX_TOTAL_BUFSIZE (CONFIG_ETH_BUFSIZE * CONFIG_TX_DESCR_NUM) +#define RX_TOTAL_BUFSIZE (CONFIG_ETH_BUFSIZE * CONFIG_RX_DESCR_NUM) + +/* DMA descriptor. */ +struct ag7xxx_dma_desc { + u32 data_addr; +#define AG7XXX_DMADESC_IS_EMPTY BIT(31) +#define AG7XXX_DMADESC_FTPP_OVERRIDE_OFFSET 16 +#define AG7XXX_DMADESC_PKT_SIZE_OFFSET 0 +#define AG7XXX_DMADESC_PKT_SIZE_MASK 0xfff + u32 config; + u32 next_desc; + u32 _pad; +}; + +struct ar7xxx_eth_priv { + struct ag7xxx_dma_desc tx_mac_descrtable[CONFIG_TX_DESCR_NUM]; + struct ag7xxx_dma_desc rx_mac_descrtable[CONFIG_RX_DESCR_NUM]; + char txbuffs[TX_TOTAL_BUFSIZE] __aligned(ARCH_DMA_MINALIGN); + char rxbuffs[RX_TOTAL_BUFSIZE] __aligned(ARCH_DMA_MINALIGN); + + void __iomem *regs; + + struct eth_device *dev; + struct phy_device *phydev; + struct mii_dev *bus; + + u32 interface; + u32 tx_currdescnum; + u32 rx_currdescnum; +}; + +/* FIXME: Remove this once generic wait-for-bit is mainline */ +static int wait_for_bit(void *reg, const uint32_t mask, bool set) +{ + unsigned int timeout = 1000000; + uint32_t val; + + while (--timeout) { + val = readl(reg); + if (!set) + val = ~val; + + if ((val & mask) == mask) + return 0; + + udelay(1); + } + + debug("%s: Timeout (reg=%p mask=%08x wait_set=%i)\n", + __func__, reg, mask, set); + + return -ETIMEDOUT; +} + +/* + * Switch and MDIO access + */ +static int ag7xxx_switch_read(struct mii_dev *bus, int addr, int reg, u16 *val) +{ + void __iomem *regs = /*bus->priv*/(void *)0xba000000; // FIXME + int ret; + + writel(0x0, regs + AG7XXX_ETH_MII_MGMT_CMD); + writel((addr << AG7XXX_ETH_MII_MGMT_ADDRESS_SHIFT) | reg, + regs + AG7XXX_ETH_MII_MGMT_ADDRESS); + writel(AG7XXX_ETH_MII_MGMT_CMD_READ, + regs + AG7XXX_ETH_MII_MGMT_CMD); + + ret = wait_for_bit(regs + AG7XXX_ETH_MII_MGMT_IND, + AG7XXX_ETH_MII_MGMT_IND_BUSY, 0); + if (ret) + return ret; + + *val = readl(regs + AG7XXX_ETH_MII_MGMT_STATUS) & 0xffff; + writel(0x0, regs + AG7XXX_ETH_MII_MGMT_CMD); + + return 0; +} + +static int ag7xxx_switch_write(struct mii_dev *bus, int addr, int reg, u16 val) +{ + void __iomem *regs = /*bus->priv*/(void *)0xba000000; // FIXME + int ret; + + writel((addr << AG7XXX_ETH_MII_MGMT_ADDRESS_SHIFT) | reg, + regs + AG7XXX_ETH_MII_MGMT_ADDRESS); + writel(val, regs + AG7XXX_ETH_MII_MGMT_CTRL); + + ret = wait_for_bit(regs + AG7XXX_ETH_MII_MGMT_IND, + AG7XXX_ETH_MII_MGMT_IND_BUSY, 0); + + return ret; +} + +static int ag7xxx_switch_reg_read(struct mii_dev *bus, int reg, u32 *val) +{ + const u32 phy_addr = 0x1f; + const u32 reg_addr = 0x10; + u32 phy_temp; + u32 reg_temp; + u16 rv = 0; + int ret; + + ret = ag7xxx_switch_write(bus, phy_addr, reg_addr, reg >> 9); + if (ret) + return ret; + + phy_temp = ((reg >> 6) & 0x7) | 0x10; + reg_temp = (reg >> 1) & 0x1e; + *val = 0; + + ret = ag7xxx_switch_read(bus, phy_temp, reg_temp | 0, &rv); + if (ret < 0) + return ret; + *val |= rv; + + ret = ag7xxx_switch_read(bus, phy_temp, reg_temp | 1, &rv); + if (ret < 0) + return ret; + *val |= (rv << 16); + + return 0; +} + +static int ag7xxx_switch_reg_write(struct mii_dev *bus, int reg, u32 val) +{ + const u32 phy_addr = 0x1f; + const u32 reg_addr = 0x10; + u32 phy_temp; + u32 reg_temp; + int ret; + + ret = ag7xxx_switch_write(bus, phy_addr, reg_addr, reg >> 9); + if (ret) + return ret; + + phy_temp = ((reg >> 6) & 0x7) | 0x10; + reg_temp = (reg >> 1) & 0x1e; + + /* + * The switch has some special registers which expect particular + * write order of their nibbles: + * 0x40 ..... MSB first, LSB second + * 0x50 ..... MSB first, LSB second + * 0x98 ..... LSB first, MSB second + * others ... don't care + */ + if (reg == 0x98) { + ret = ag7xxx_switch_write(bus, phy_temp, reg_temp | 0, val & 0xffff); + if (ret < 0) + return ret; + + ret = ag7xxx_switch_write(bus, phy_temp, reg_temp | 1, val >> 16); + if (ret < 0) + return ret; + } else { + ret = ag7xxx_switch_write(bus, phy_temp, reg_temp | 1, val >> 16); + if (ret < 0) + return ret; + + ret = ag7xxx_switch_write(bus, phy_temp, reg_temp | 0, val & 0xffff); + if (ret < 0) + return ret; + } + + return 0; +} + +static u16 ag7xxx_mdio_rw(struct mii_dev *bus, int addr, int reg, u16 val) +{ + u32 data; + + /* Dummy read followed by PHY read/write command. */ + ag7xxx_switch_reg_read(bus, 0x98, &data); + data = val | (reg << 16) | (addr << 21) | BIT(27) | BIT(30) | BIT(31); + ag7xxx_switch_reg_write(bus, 0x98, data); + + /* Wait for operation to finish */ + do { + ag7xxx_switch_reg_read(bus, 0x98, &data); + } while (data & BIT(31)); + + return data & 0xffff; +} + +static int ag7xxx_mdio_read(struct mii_dev *bus, int addr, int devad, int reg) +{ + return ag7xxx_mdio_rw(bus, addr, reg, 0); +} + +static int ag7xxx_mdio_write(struct mii_dev *bus, int addr, int devad, int reg, + u16 val) +{ + ag7xxx_mdio_rw(bus, addr, reg, val); + return 0; +} + +/* + * DMA ring handlers + */ +static void ag7xxx_dma_clean_tx(struct udevice *dev) +{ + struct ar7xxx_eth_priv *priv = dev_get_priv(dev); + struct ag7xxx_dma_desc *curr, *next; + int i; + + for (i = 0; i < CONFIG_TX_DESCR_NUM; i++) { + curr = &priv->tx_mac_descrtable[i]; + next = &priv->tx_mac_descrtable[(i + 1) % CONFIG_TX_DESCR_NUM]; + + curr->data_addr = virt_to_phys(&priv->txbuffs[i * CONFIG_ETH_BUFSIZE]); + curr->config = AG7XXX_DMADESC_IS_EMPTY; + curr->next_desc = virt_to_phys(next); + } + + priv->tx_currdescnum = 0; +} + +static void ag7xxx_dma_clean_rx(struct udevice *dev) +{ + struct ar7xxx_eth_priv *priv = dev_get_priv(dev); + struct ag7xxx_dma_desc *curr, *next; + int i; + + for (i = 0; i < CONFIG_RX_DESCR_NUM; i++) { + curr = &priv->rx_mac_descrtable[i]; + next = &priv->rx_mac_descrtable[(i + 1) % CONFIG_RX_DESCR_NUM]; + + curr->data_addr = virt_to_phys(&priv->rxbuffs[i * CONFIG_ETH_BUFSIZE]); + curr->config = AG7XXX_DMADESC_IS_EMPTY; + curr->next_desc = virt_to_phys(next); + } + + priv->rx_currdescnum = 0; +} + +/* + * Ethernet I/O + */ +static int ag7xxx_eth_send(struct udevice *dev, void *packet, int length) +{ + struct ar7xxx_eth_priv *priv = dev_get_priv(dev); + struct ag7xxx_dma_desc *curr; + + curr = &priv->tx_mac_descrtable[priv->tx_currdescnum]; + + if (!(curr->config & AG7XXX_DMADESC_IS_EMPTY)) { + printf("ag7xxx: Out of TX DMA descriptors!\n"); + return -EPERM; + } + + /* Copy the packet into the data buffer. */ + memcpy(phys_to_virt(curr->data_addr), packet, length); + curr->config = length & AG7XXX_DMADESC_PKT_SIZE_MASK; + + /* Load the DMA descriptor and start TX DMA. */ + writel(AG7XXX_ETH_DMA_TX_CTRL_TXE, + priv->regs + AG7XXX_ETH_DMA_TX_CTRL); + + /* Switch to next TX descriptor. */ + priv->tx_currdescnum = (priv->tx_currdescnum + 1) % CONFIG_TX_DESCR_NUM; + + return 0; +} + +static int ag7xxx_eth_recv(struct udevice *dev, int flags, uchar **packetp) +{ + struct ar7xxx_eth_priv *priv = dev_get_priv(dev); + struct ag7xxx_dma_desc *curr; + + curr = &priv->rx_mac_descrtable[priv->rx_currdescnum]; + + /* No packets received. */ + if (curr->config & AG7XXX_DMADESC_IS_EMPTY) + return -EAGAIN; + + /* Receive one packet and return length. */ + *packetp = phys_to_virt(curr->data_addr); + return curr->config & AG7XXX_DMADESC_PKT_SIZE_MASK; +} + +static int ag7xxx_eth_free_pkt(struct udevice *dev, uchar *packet, + int length) +{ + struct ar7xxx_eth_priv *priv = dev_get_priv(dev); + struct ag7xxx_dma_desc *curr; + + curr = &priv->rx_mac_descrtable[priv->rx_currdescnum]; + + memset(phys_to_virt(curr->data_addr), 0, CONFIG_ETH_BUFSIZE); + curr->config = AG7XXX_DMADESC_IS_EMPTY; + + /* Switch to next RX descriptor. */ + priv->rx_currdescnum = (priv->rx_currdescnum + 1) % CONFIG_RX_DESCR_NUM; + + return 0; +} + +static int ag7xxx_eth_start(struct udevice *dev) +{ + struct ar7xxx_eth_priv *priv = dev_get_priv(dev); + + /* FIXME: Check if link up */ + + /* Clear the DMA rings. */ + ag7xxx_dma_clean_tx(dev); + ag7xxx_dma_clean_rx(dev); + + /* Load DMA descriptors and start the RX DMA. */ + writel(virt_to_phys(&priv->tx_mac_descrtable[priv->tx_currdescnum]), + priv->regs + AG7XXX_ETH_DMA_TX_DESC); + writel(virt_to_phys(&priv->rx_mac_descrtable[priv->rx_currdescnum]), + priv->regs + AG7XXX_ETH_DMA_RX_DESC); + writel(AG7XXX_ETH_DMA_RX_CTRL_RXE, + priv->regs + AG7XXX_ETH_DMA_RX_CTRL); + + return 0; +} + +static void ag7xxx_eth_stop(struct udevice *dev) +{ + struct ar7xxx_eth_priv *priv = dev_get_priv(dev); + + /* Stop the TX DMA. */ + writel(0, priv->regs + AG7XXX_ETH_DMA_TX_CTRL); + wait_for_bit(priv->regs + AG7XXX_ETH_DMA_TX_CTRL, ~0, 0); + + /* Stop the RX DMA. */ + writel(0, priv->regs + AG7XXX_ETH_DMA_RX_CTRL); + wait_for_bit(priv->regs + AG7XXX_ETH_DMA_RX_CTRL, ~0, 0); +} + +/* + * Hardware setup + */ +static int ag7xxx_eth_write_hwaddr(struct udevice *dev) +{ + struct eth_pdata *pdata = dev_get_platdata(dev); + struct ar7xxx_eth_priv *priv = dev_get_priv(dev); + unsigned char *mac = pdata->enetaddr; + u32 macid_lo, macid_hi; + + macid_hi = mac[3] | (mac[2] << 8) | (mac[1] << 16) | (mac[0] << 24); + macid_lo = (mac[5] << 16) | (mac[4] << 24); + + writel(macid_lo, priv->regs + AG7XXX_ETH_ADDR1); + writel(macid_hi, priv->regs + AG7XXX_ETH_ADDR2); + + return 0; +} + +static void ag7xxx_hw_setup(struct udevice *dev) +{ + struct ar7xxx_eth_priv *priv = dev_get_priv(dev); + u32 speed; + + setbits_be32(priv->regs + AG7XXX_ETH_CFG1, + AG7XXX_ETH_CFG1_RX_RST | AG7XXX_ETH_CFG1_TX_RST | + AG7XXX_ETH_CFG1_SOFT_RST); + + mdelay(10); + + writel(AG7XXX_ETH_CFG1_RX_EN | AG7XXX_ETH_CFG1_TX_EN, + priv->regs + AG7XXX_ETH_CFG1); + + if (priv->interface == PHY_INTERFACE_MODE_RMII) + speed = AG7XXX_ETH_CFG2_IF_10_100; + else + speed = AG7XXX_ETH_CFG2_IF_1000; + + clrsetbits_be32(priv->regs + AG7XXX_ETH_CFG2, + AG7XXX_ETH_CFG2_IF_SPEED_MASK, + speed | AG7XXX_ETH_CFG2_PAD_CRC_EN | + AG7XXX_ETH_CFG2_LEN_CHECK); + + writel(0xfff0000, priv->regs + AG7XXX_ETH_FIFO_CFG_1); + writel(0x1fff, priv->regs + AG7XXX_ETH_FIFO_CFG_2); + + writel(0x1f00, priv->regs + AG7XXX_ETH_FIFO_CFG_0); + setbits_be32(priv->regs + AG7XXX_ETH_FIFO_CFG_4, 0x3ffff); + writel(0x10ffff, priv->regs + AG7XXX_ETH_FIFO_CFG_1); + writel(0xaaa0555, priv->regs + AG7XXX_ETH_FIFO_CFG_2); + writel(0x7eccf, priv->regs + AG7XXX_ETH_FIFO_CFG_5); + writel(0x1f00140, priv->regs + AG7XXX_ETH_FIFO_CFG_3); +} + +static int ag7xxx_mii_get_div(void) +{ + ulong freq = get_bus_freq(0); + + switch (freq / 1000000) { + case 150: return 0x7; + case 175: return 0x5; + case 200: return 0x4; + case 210: return 0x9; + case 220: return 0x9; + default: return 0x7; + } +} + +static int ag7xxx_mii_setup(struct udevice *dev) +{ + struct ar7xxx_eth_priv *priv = dev_get_priv(dev); + int i, ret, div = ag7xxx_mii_get_div(); + u32 reg; + + /* Unit 0 is PHY-less on AR9331, see datasheet Figure 2-3 */ + if (priv->interface == PHY_INTERFACE_MODE_RMII) + return 0; + + for (i = 0; i < 10; i++) { + writel(AG7XXX_ETH_MII_MGMT_CFG_RESET | div, + priv->regs + AG7XXX_ETH_MII_MGMT_CFG); + writel(div, priv->regs + AG7XXX_ETH_MII_MGMT_CFG); + + /* Check the switch */ + ret = ag7xxx_switch_reg_read(priv->bus, 0x10c, &reg); + if (ret) + continue; + + if (reg != 0x18007fff) + continue; + + return 0; + } + + return -EINVAL; +} + +static int ag7xxx_phy_setup_wan(struct udevice *dev) +{ + struct ar7xxx_eth_priv *priv = dev_get_priv(dev); + + /* Configure switch port 4 (GMAC0) */ + return ag7xxx_mdio_write(priv->bus, 4, 0, MII_BMCR, 0x9000); +} + +static int ag7xxx_phy_setup_lan(struct udevice *dev) +{ + struct ar7xxx_eth_priv *priv = dev_get_priv(dev); + int i, ret; + u32 reg; + + /* Reset the switch */ + ret = ag7xxx_switch_reg_read(priv->bus, 0, &reg); + if (ret) + return ret; + reg |= BIT(31); + ret = ag7xxx_switch_reg_write(priv->bus, 0, reg); + if (ret) + return ret; + + do { + ret = ag7xxx_switch_reg_read(priv->bus, 0, &reg); + if (ret) + return ret; + } while (reg & BIT(31)); + + /* Configure switch ports 0...3 (GMAC1) */ + for (i = 0; i < 4; i++) { + ret = ag7xxx_mdio_write(priv->bus, 0x4, 0, MII_BMCR, 0x9000); + if (ret) + return ret; + } + + /* Enable CPU port */ + ret = ag7xxx_switch_reg_write(priv->bus, 0x78, BIT(8)); + if (ret) + return ret; + + for (i = 0; i < 4; i++) { + ret = ag7xxx_switch_reg_write(priv->bus, i * 0x100, BIT(9)); + if (ret) + return ret; + } + + /* QM Control */ + ret = ag7xxx_switch_reg_write(priv->bus, 0x38, 0xc000050e); + if (ret) + return ret; + + /* Disable Atheros header */ + ret = ag7xxx_switch_reg_write(priv->bus, 0x104, 0x4004); + if (ret) + return ret; + + /* Tag priority mapping */ + ret = ag7xxx_switch_reg_write(priv->bus, 0x70, 0xfa50); + if (ret) + return ret; + + /* Enable ARP packets to the CPU */ + ret = ag7xxx_switch_reg_read(priv->bus, 0x5c, &reg); + if (ret) + return ret; + reg |= 0x100000; + ret = ag7xxx_switch_reg_write(priv->bus, 0x5c, reg); + if (ret) + return ret; + + return 0; +} + +static int ag7xxx_phy_setup_reset_set(struct udevice *dev, int port) +{ + struct ar7xxx_eth_priv *priv = dev_get_priv(dev); + int ret; + + ret = ag7xxx_mdio_write(priv->bus, port, 0, MII_ADVERTISE, + ADVERTISE_ALL | ADVERTISE_PAUSE_CAP | + ADVERTISE_PAUSE_ASYM); + if (ret) + return ret; + + return ag7xxx_mdio_write(priv->bus, port, 0, MII_BMCR, + BMCR_ANENABLE | BMCR_RESET); +} + +static int ag7xxx_phy_setup_reset_fin(struct udevice *dev, int port) +{ + struct ar7xxx_eth_priv *priv = dev_get_priv(dev); + int ret; + + do { + ret = ag7xxx_mdio_read(priv->bus, port, 0, MII_BMCR); + if (ret < 0) + return ret; + mdelay(10); + } while (ret & BMCR_RESET); + + return 0; +} + +static int ag7xxx_phy_setup_common(struct udevice *dev) +{ + struct ar7xxx_eth_priv *priv = dev_get_priv(dev); + int i, ret; + + if (priv->interface == PHY_INTERFACE_MODE_RMII) { + ret = ag7xxx_phy_setup_reset_set(dev, 4); + if (ret) + return ret; + + ret = ag7xxx_phy_setup_reset_fin(dev, 4); + if (ret) + return ret; + + /* Read out link status */ + ret = ag7xxx_mdio_read(priv->bus, 4, 0, 0x11); + if (ret < 0) + return ret; + + return 0; + } + + /* Switch ports */ + for (i = 0; i < 4; i++) { + ret = ag7xxx_phy_setup_reset_set(dev, i); + if (ret) + return ret; + } + + for (i = 0; i < 4; i++) { + ret = ag7xxx_phy_setup_reset_fin(dev, i); + if (ret) + return ret; + } + + for (i = 0; i < 4; i++) { + /* Read out link status */ + ret = ag7xxx_mdio_read(priv->bus, i, 0, 0x11); + if (ret < 0) + return ret; + } + + return 0; +} + +static int ag7xxx_mac_probe(struct udevice *dev) +{ + struct ar7xxx_eth_priv *priv = dev_get_priv(dev); + int ret; + + ag7xxx_hw_setup(dev); + ret = ag7xxx_mii_setup(dev); + if (ret) + return ret; + + ag7xxx_eth_write_hwaddr(dev); + + if (priv->interface == PHY_INTERFACE_MODE_RMII) + ret = ag7xxx_phy_setup_wan(dev); + else + ret = ag7xxx_phy_setup_lan(dev); + if (ret) + return ret; + + return ag7xxx_phy_setup_common(dev); +} + +static int ag7xxx_mdio_probe(struct udevice *dev) +{ + struct ar7xxx_eth_priv *priv = dev_get_priv(dev); + struct mii_dev *bus = mdio_alloc(); + + if (!bus) { + printf("Failed to allocate MDIO bus\n"); + return -ENOMEM; + } + + bus->read = ag7xxx_mdio_read; + bus->write = ag7xxx_mdio_write; + snprintf(bus->name, sizeof(bus->name), dev->name); + + bus->priv = (void *)priv->regs; + + return mdio_register(bus); +} + +static int ag7xxx_eth_probe(struct udevice *dev) +{ + struct eth_pdata *pdata = dev_get_platdata(dev); + struct ar7xxx_eth_priv *priv = dev_get_priv(dev); + void __iomem *iobase; + int ret; + + iobase = map_physmem(pdata->iobase, 0x200, MAP_NOCACHE); + + debug("%s, iobase=%p, priv=%p\n", __func__, iobase, priv); + priv->regs = iobase; + priv->interface = pdata->phy_interface; + + ret = ag7xxx_mdio_probe(dev); + if (ret) + return ret; + + priv->bus = miiphy_get_dev_by_name(dev->name); + + ret = ag7xxx_mac_probe(dev); + debug("%s, ret=%d\n", __func__, ret); + + return ret; +} + +static int ag7xxx_eth_remove(struct udevice *dev) +{ + struct ar7xxx_eth_priv *priv = dev_get_priv(dev); + + free(priv->phydev); + mdio_unregister(priv->bus); + mdio_free(priv->bus); + + return 0; +} + +static const struct eth_ops ag7xxx_eth_ops = { + .start = ag7xxx_eth_start, + .send = ag7xxx_eth_send, + .recv = ag7xxx_eth_recv, + .free_pkt = ag7xxx_eth_free_pkt, + .stop = ag7xxx_eth_stop, + .write_hwaddr = ag7xxx_eth_write_hwaddr, +}; + +static int ag7xxx_eth_ofdata_to_platdata(struct udevice *dev) +{ + struct eth_pdata *pdata = dev_get_platdata(dev); + const char *phy_mode; + + pdata->iobase = dev_get_addr(dev); + pdata->phy_interface = -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); + if (pdata->phy_interface == -1) { + debug("%s: Invalid PHY interface '%s'\n", __func__, phy_mode); + return -EINVAL; + } + + return 0; +} + +static const struct udevice_id ag7xxx_eth_ids[] = { + { .compatible = "qca,ag7240-mac" }, + { } +}; + +U_BOOT_DRIVER(eth_ag7xxx) = { + .name = "eth_ag7xxx", + .id = UCLASS_ETH, + .of_match = ag7xxx_eth_ids, + .ofdata_to_platdata = ag7xxx_eth_ofdata_to_platdata, + .probe = ag7xxx_eth_probe, + .remove = ag7xxx_eth_remove, + .ops = &ag7xxx_eth_ops, + .priv_auto_alloc_size = sizeof(struct ar7xxx_eth_priv), + .platdata_auto_alloc_size = sizeof(struct eth_pdata), + .flags = DM_FLAG_ALLOC_PRIV_DMA, +}; +