/* * (C) Copyright 2011 Michal Simek * * Michal SIMEK * * Based on Xilinx gmac driver: * (C) Copyright 2011 Xilinx * * SPDX-License-Identifier: GPL-2.0+ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if !defined(CONFIG_PHYLIB) # error XILINX_GEM_ETHERNET requires PHYLIB #endif /* Bit/mask specification */ #define ZYNQ_GEM_PHYMNTNC_OP_MASK 0x40020000 /* operation mask bits */ #define ZYNQ_GEM_PHYMNTNC_OP_R_MASK 0x20000000 /* read operation */ #define ZYNQ_GEM_PHYMNTNC_OP_W_MASK 0x10000000 /* write operation */ #define ZYNQ_GEM_PHYMNTNC_PHYAD_SHIFT_MASK 23 /* Shift bits for PHYAD */ #define ZYNQ_GEM_PHYMNTNC_PHREG_SHIFT_MASK 18 /* Shift bits for PHREG */ #define ZYNQ_GEM_RXBUF_EOF_MASK 0x00008000 /* End of frame. */ #define ZYNQ_GEM_RXBUF_SOF_MASK 0x00004000 /* Start of frame. */ #define ZYNQ_GEM_RXBUF_LEN_MASK 0x00003FFF /* Mask for length field */ #define ZYNQ_GEM_RXBUF_WRAP_MASK 0x00000002 /* Wrap bit, last BD */ #define ZYNQ_GEM_RXBUF_NEW_MASK 0x00000001 /* Used bit.. */ #define ZYNQ_GEM_RXBUF_ADD_MASK 0xFFFFFFFC /* Mask for address */ /* Wrap bit, last descriptor */ #define ZYNQ_GEM_TXBUF_WRAP_MASK 0x40000000 #define ZYNQ_GEM_TXBUF_LAST_MASK 0x00008000 /* Last buffer */ #define ZYNQ_GEM_NWCTRL_TXEN_MASK 0x00000008 /* Enable transmit */ #define ZYNQ_GEM_NWCTRL_RXEN_MASK 0x00000004 /* Enable receive */ #define ZYNQ_GEM_NWCTRL_MDEN_MASK 0x00000010 /* Enable MDIO port */ #define ZYNQ_GEM_NWCTRL_STARTTX_MASK 0x00000200 /* Start tx (tx_go) */ #define ZYNQ_GEM_NWCFG_SPEED100 0x000000001 /* 100 Mbps operation */ #define ZYNQ_GEM_NWCFG_SPEED1000 0x000000400 /* 1Gbps operation */ #define ZYNQ_GEM_NWCFG_FDEN 0x000000002 /* Full Duplex mode */ #define ZYNQ_GEM_NWCFG_FSREM 0x000020000 /* FCS removal */ #define ZYNQ_GEM_NWCFG_MDCCLKDIV 0x000080000 /* Div pclk by 32, 80MHz */ #define ZYNQ_GEM_NWCFG_MDCCLKDIV2 0x0000c0000 /* Div pclk by 48, 120MHz */ #ifdef CONFIG_ARM64 # define ZYNQ_GEM_DBUS_WIDTH (1 << 21) /* 64 bit bus */ #else # define ZYNQ_GEM_DBUS_WIDTH (0 << 21) /* 32 bit bus */ #endif #define ZYNQ_GEM_NWCFG_INIT (ZYNQ_GEM_DBUS_WIDTH | \ ZYNQ_GEM_NWCFG_FDEN | \ ZYNQ_GEM_NWCFG_FSREM | \ ZYNQ_GEM_NWCFG_MDCCLKDIV) #define ZYNQ_GEM_NWSR_MDIOIDLE_MASK 0x00000004 /* PHY management idle */ #define ZYNQ_GEM_DMACR_BLENGTH 0x00000004 /* INCR4 AHB bursts */ /* Use full configured addressable space (8 Kb) */ #define ZYNQ_GEM_DMACR_RXSIZE 0x00000300 /* Use full configured addressable space (4 Kb) */ #define ZYNQ_GEM_DMACR_TXSIZE 0x00000400 /* Set with binary 00011000 to use 1536 byte(1*max length frame/buffer) */ #define ZYNQ_GEM_DMACR_RXBUF 0x00180000 #define ZYNQ_GEM_DMACR_INIT (ZYNQ_GEM_DMACR_BLENGTH | \ ZYNQ_GEM_DMACR_RXSIZE | \ ZYNQ_GEM_DMACR_TXSIZE | \ ZYNQ_GEM_DMACR_RXBUF) /* Use MII register 1 (MII status register) to detect PHY */ #define PHY_DETECT_REG 1 /* Mask used to verify certain PHY features (or register contents) * in the register above: * 0x1000: 10Mbps full duplex support * 0x0800: 10Mbps half duplex support * 0x0008: Auto-negotiation support */ #define PHY_DETECT_MASK 0x1808 /* TX BD status masks */ #define ZYNQ_GEM_TXBUF_FRMLEN_MASK 0x000007ff #define ZYNQ_GEM_TXBUF_EXHAUSTED 0x08000000 #define ZYNQ_GEM_TXBUF_UNDERRUN 0x10000000 /* Clock frequencies for different speeds */ #define ZYNQ_GEM_FREQUENCY_10 2500000UL #define ZYNQ_GEM_FREQUENCY_100 25000000UL #define ZYNQ_GEM_FREQUENCY_1000 125000000UL /* Device registers */ struct zynq_gem_regs { u32 nwctrl; /* 0x0 - Network Control reg */ u32 nwcfg; /* 0x4 - Network Config reg */ u32 nwsr; /* 0x8 - Network Status reg */ u32 reserved1; u32 dmacr; /* 0x10 - DMA Control reg */ u32 txsr; /* 0x14 - TX Status reg */ u32 rxqbase; /* 0x18 - RX Q Base address reg */ u32 txqbase; /* 0x1c - TX Q Base address reg */ u32 rxsr; /* 0x20 - RX Status reg */ u32 reserved2[2]; u32 idr; /* 0x2c - Interrupt Disable reg */ u32 reserved3; u32 phymntnc; /* 0x34 - Phy Maintaince reg */ u32 reserved4[18]; u32 hashl; /* 0x80 - Hash Low address reg */ u32 hashh; /* 0x84 - Hash High address reg */ #define LADDR_LOW 0 #define LADDR_HIGH 1 u32 laddr[4][LADDR_HIGH + 1]; /* 0x8c - Specific1 addr low/high reg */ u32 match[4]; /* 0xa8 - Type ID1 Match reg */ u32 reserved6[18]; #define STAT_SIZE 44 u32 stat[STAT_SIZE]; /* 0x100 - Octects transmitted Low reg */ }; /* BD descriptors */ struct emac_bd { u32 addr; /* Next descriptor pointer */ u32 status; }; #define RX_BUF 32 /* Page table entries are set to 1MB, or multiples of 1MB * (not < 1MB). driver uses less bd's so use 1MB bdspace. */ #define BD_SPACE 0x100000 /* BD separation space */ #define BD_SEPRN_SPACE (RX_BUF * sizeof(struct emac_bd)) /* Initialized, rxbd_current, rx_first_buf must be 0 after init */ struct zynq_gem_priv { struct emac_bd *tx_bd; struct emac_bd *rx_bd; char *rxbuffers; u32 rxbd_current; u32 rx_first_buf; int phyaddr; u32 emio; int init; phy_interface_t interface; struct phy_device *phydev; struct mii_dev *bus; }; static inline int mdio_wait(struct eth_device *dev) { struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase; u32 timeout = 20000; /* Wait till MDIO interface is ready to accept a new transaction. */ while (--timeout) { if (readl(®s->nwsr) & ZYNQ_GEM_NWSR_MDIOIDLE_MASK) break; WATCHDOG_RESET(); } if (!timeout) { printf("%s: Timeout\n", __func__); return 1; } return 0; } static u32 phy_setup_op(struct eth_device *dev, u32 phy_addr, u32 regnum, u32 op, u16 *data) { u32 mgtcr; struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase; if (mdio_wait(dev)) return 1; /* Construct mgtcr mask for the operation */ mgtcr = ZYNQ_GEM_PHYMNTNC_OP_MASK | op | (phy_addr << ZYNQ_GEM_PHYMNTNC_PHYAD_SHIFT_MASK) | (regnum << ZYNQ_GEM_PHYMNTNC_PHREG_SHIFT_MASK) | *data; /* Write mgtcr and wait for completion */ writel(mgtcr, ®s->phymntnc); if (mdio_wait(dev)) return 1; if (op == ZYNQ_GEM_PHYMNTNC_OP_R_MASK) *data = readl(®s->phymntnc); return 0; } static u32 phyread(struct eth_device *dev, u32 phy_addr, u32 regnum, u16 *val) { u32 ret; ret = phy_setup_op(dev, phy_addr, regnum, ZYNQ_GEM_PHYMNTNC_OP_R_MASK, val); if (!ret) debug("%s: phy_addr %d, regnum 0x%x, val 0x%x\n", __func__, phy_addr, regnum, *val); return ret; } static u32 phywrite(struct eth_device *dev, u32 phy_addr, u32 regnum, u16 data) { debug("%s: phy_addr %d, regnum 0x%x, data 0x%x\n", __func__, phy_addr, regnum, data); return phy_setup_op(dev, phy_addr, regnum, ZYNQ_GEM_PHYMNTNC_OP_W_MASK, &data); } static void phy_detection(struct eth_device *dev) { int i; u16 phyreg; struct zynq_gem_priv *priv = dev->priv; if (priv->phyaddr != -1) { phyread(dev, priv->phyaddr, PHY_DETECT_REG, &phyreg); if ((phyreg != 0xFFFF) && ((phyreg & PHY_DETECT_MASK) == PHY_DETECT_MASK)) { /* Found a valid PHY address */ debug("Default phy address %d is valid\n", priv->phyaddr); return; } else { debug("PHY address is not setup correctly %d\n", priv->phyaddr); priv->phyaddr = -1; } } debug("detecting phy address\n"); if (priv->phyaddr == -1) { /* detect the PHY address */ for (i = 31; i >= 0; i--) { phyread(dev, i, PHY_DETECT_REG, &phyreg); if ((phyreg != 0xFFFF) && ((phyreg & PHY_DETECT_MASK) == PHY_DETECT_MASK)) { /* Found a valid PHY address */ priv->phyaddr = i; debug("Found valid phy address, %d\n", i); return; } } } printf("PHY is not detected\n"); } static int zynq_gem_setup_mac(struct eth_device *dev) { u32 i, macaddrlow, macaddrhigh; struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase; /* Set the MAC bits [31:0] in BOT */ macaddrlow = dev->enetaddr[0]; macaddrlow |= dev->enetaddr[1] << 8; macaddrlow |= dev->enetaddr[2] << 16; macaddrlow |= dev->enetaddr[3] << 24; /* Set MAC bits [47:32] in TOP */ macaddrhigh = dev->enetaddr[4]; macaddrhigh |= dev->enetaddr[5] << 8; for (i = 0; i < 4; i++) { writel(0, ®s->laddr[i][LADDR_LOW]); writel(0, ®s->laddr[i][LADDR_HIGH]); /* Do not use MATCHx register */ writel(0, ®s->match[i]); } writel(macaddrlow, ®s->laddr[0][LADDR_LOW]); writel(macaddrhigh, ®s->laddr[0][LADDR_HIGH]); return 0; } static int zynq_gem_init(struct eth_device *dev, bd_t * bis) { u32 i; unsigned long clk_rate = 0; struct phy_device *phydev; struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase; struct zynq_gem_priv *priv = dev->priv; const u32 supported = SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full; if (!priv->init) { /* Disable all interrupts */ writel(0xFFFFFFFF, ®s->idr); /* Disable the receiver & transmitter */ writel(0, ®s->nwctrl); writel(0, ®s->txsr); writel(0, ®s->rxsr); writel(0, ®s->phymntnc); /* Clear the Hash registers for the mac address * pointed by AddressPtr */ writel(0x0, ®s->hashl); /* Write bits [63:32] in TOP */ writel(0x0, ®s->hashh); /* Clear all counters */ for (i = 0; i < STAT_SIZE; i++) readl(®s->stat[i]); /* Setup RxBD space */ memset(priv->rx_bd, 0, RX_BUF * sizeof(struct emac_bd)); for (i = 0; i < RX_BUF; i++) { priv->rx_bd[i].status = 0xF0000000; priv->rx_bd[i].addr = ((ulong)(priv->rxbuffers) + (i * PKTSIZE_ALIGN)); } /* WRAP bit to last BD */ priv->rx_bd[--i].addr |= ZYNQ_GEM_RXBUF_WRAP_MASK; /* Write RxBDs to IP */ writel((ulong)priv->rx_bd, ®s->rxqbase); /* Setup for DMA Configuration register */ writel(ZYNQ_GEM_DMACR_INIT, ®s->dmacr); /* Setup for Network Control register, MDIO, Rx and Tx enable */ setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_MDEN_MASK); priv->init++; } phy_detection(dev); /* interface - look at tsec */ phydev = phy_connect(priv->bus, priv->phyaddr, dev, priv->interface); phydev->supported = supported | ADVERTISED_Pause | ADVERTISED_Asym_Pause; phydev->advertising = phydev->supported; priv->phydev = phydev; phy_config(phydev); phy_startup(phydev); if (!phydev->link) { printf("%s: No link.\n", phydev->dev->name); return -1; } switch (phydev->speed) { case SPEED_1000: writel(ZYNQ_GEM_NWCFG_INIT | ZYNQ_GEM_NWCFG_SPEED1000, ®s->nwcfg); clk_rate = ZYNQ_GEM_FREQUENCY_1000; break; case SPEED_100: clrsetbits_le32(®s->nwcfg, ZYNQ_GEM_NWCFG_SPEED1000, ZYNQ_GEM_NWCFG_INIT | ZYNQ_GEM_NWCFG_SPEED100); clk_rate = ZYNQ_GEM_FREQUENCY_100; break; case SPEED_10: clk_rate = ZYNQ_GEM_FREQUENCY_10; break; } /* Change the rclk and clk only not using EMIO interface */ if (!priv->emio) zynq_slcr_gem_clk_setup(dev->iobase != ZYNQ_GEM_BASEADDR0, clk_rate); setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_RXEN_MASK | ZYNQ_GEM_NWCTRL_TXEN_MASK); return 0; } static int zynq_gem_send(struct eth_device *dev, void *ptr, int len) { u32 addr, size; struct zynq_gem_priv *priv = dev->priv; struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase; /* Setup Tx BD */ memset(priv->tx_bd, 0, sizeof(struct emac_bd)); priv->tx_bd->addr = (ulong)ptr; priv->tx_bd->status = (len & ZYNQ_GEM_TXBUF_FRMLEN_MASK) | ZYNQ_GEM_TXBUF_LAST_MASK | ZYNQ_GEM_TXBUF_WRAP_MASK; /* setup BD */ writel((ulong)priv->tx_bd, ®s->txqbase); addr = (ulong) ptr; addr &= ~(ARCH_DMA_MINALIGN - 1); size = roundup(len, ARCH_DMA_MINALIGN); flush_dcache_range(addr, addr + size); addr = (ulong)priv->rxbuffers; addr &= ~(ARCH_DMA_MINALIGN - 1); size = roundup((RX_BUF * PKTSIZE_ALIGN), ARCH_DMA_MINALIGN); flush_dcache_range(addr, addr + size); barrier(); /* Start transmit */ setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_STARTTX_MASK); /* Read TX BD status */ if (priv->tx_bd->status & ZYNQ_GEM_TXBUF_EXHAUSTED) printf("TX buffers exhausted in mid frame\n"); return 0; } /* Do not check frame_recd flag in rx_status register 0x20 - just poll BD */ static int zynq_gem_recv(struct eth_device *dev) { int frame_len; struct zynq_gem_priv *priv = dev->priv; struct emac_bd *current_bd = &priv->rx_bd[priv->rxbd_current]; struct emac_bd *first_bd; if (!(current_bd->addr & ZYNQ_GEM_RXBUF_NEW_MASK)) return 0; if (!(current_bd->status & (ZYNQ_GEM_RXBUF_SOF_MASK | ZYNQ_GEM_RXBUF_EOF_MASK))) { printf("GEM: SOF or EOF not set for last buffer received!\n"); return 0; } frame_len = current_bd->status & ZYNQ_GEM_RXBUF_LEN_MASK; if (frame_len) { u32 addr = current_bd->addr & ZYNQ_GEM_RXBUF_ADD_MASK; addr &= ~(ARCH_DMA_MINALIGN - 1); net_process_received_packet((u8 *)(ulong)addr, frame_len); if (current_bd->status & ZYNQ_GEM_RXBUF_SOF_MASK) priv->rx_first_buf = priv->rxbd_current; else { current_bd->addr &= ~ZYNQ_GEM_RXBUF_NEW_MASK; current_bd->status = 0xF0000000; /* FIXME */ } if (current_bd->status & ZYNQ_GEM_RXBUF_EOF_MASK) { first_bd = &priv->rx_bd[priv->rx_first_buf]; first_bd->addr &= ~ZYNQ_GEM_RXBUF_NEW_MASK; first_bd->status = 0xF0000000; } if ((++priv->rxbd_current) >= RX_BUF) priv->rxbd_current = 0; } return frame_len; } static void zynq_gem_halt(struct eth_device *dev) { struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase; clrsetbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_RXEN_MASK | ZYNQ_GEM_NWCTRL_TXEN_MASK, 0); } static int zynq_gem_miiphyread(const char *devname, uchar addr, uchar reg, ushort *val) { struct eth_device *dev = eth_get_dev(); int ret; ret = phyread(dev, addr, reg, val); debug("%s 0x%x, 0x%x, 0x%x\n", __func__, addr, reg, *val); return ret; } static int zynq_gem_miiphy_write(const char *devname, uchar addr, uchar reg, ushort val) { struct eth_device *dev = eth_get_dev(); debug("%s 0x%x, 0x%x, 0x%x\n", __func__, addr, reg, val); return phywrite(dev, addr, reg, val); } int zynq_gem_initialize(bd_t *bis, phys_addr_t base_addr, int phy_addr, u32 emio) { struct eth_device *dev; struct zynq_gem_priv *priv; void *bd_space; dev = calloc(1, sizeof(*dev)); if (dev == NULL) return -1; dev->priv = calloc(1, sizeof(struct zynq_gem_priv)); if (dev->priv == NULL) { free(dev); return -1; } priv = dev->priv; /* Align rxbuffers to ARCH_DMA_MINALIGN */ priv->rxbuffers = memalign(ARCH_DMA_MINALIGN, RX_BUF * PKTSIZE_ALIGN); memset(priv->rxbuffers, 0, RX_BUF * PKTSIZE_ALIGN); /* Align bd_space to MMU_SECTION_SHIFT */ bd_space = memalign(1 << MMU_SECTION_SHIFT, BD_SPACE); mmu_set_region_dcache_behaviour((phys_addr_t)bd_space, BD_SPACE, DCACHE_OFF); /* Initialize the bd spaces for tx and rx bd's */ priv->tx_bd = (struct emac_bd *)bd_space; priv->rx_bd = (struct emac_bd *)((ulong)bd_space + BD_SEPRN_SPACE); priv->phyaddr = phy_addr; priv->emio = emio; #ifndef CONFIG_ZYNQ_GEM_INTERFACE priv->interface = PHY_INTERFACE_MODE_MII; #else priv->interface = CONFIG_ZYNQ_GEM_INTERFACE; #endif sprintf(dev->name, "Gem.%lx", base_addr); dev->iobase = base_addr; dev->init = zynq_gem_init; dev->halt = zynq_gem_halt; dev->send = zynq_gem_send; dev->recv = zynq_gem_recv; dev->write_hwaddr = zynq_gem_setup_mac; eth_register(dev); miiphy_register(dev->name, zynq_gem_miiphyread, zynq_gem_miiphy_write); priv->bus = miiphy_get_dev_by_name(dev->name); return 1; } #if CONFIG_IS_ENABLED(OF_CONTROL) int zynq_gem_of_init(const void *blob) { int offset = 0; u32 ret = 0; u32 reg, phy_reg; debug("ZYNQ GEM: Initialization\n"); do { offset = fdt_node_offset_by_compatible(blob, offset, "xlnx,ps7-ethernet-1.00.a"); if (offset != -1) { reg = fdtdec_get_addr(blob, offset, "reg"); if (reg != FDT_ADDR_T_NONE) { offset = fdtdec_lookup_phandle(blob, offset, "phy-handle"); if (offset != -1) phy_reg = fdtdec_get_addr(blob, offset, "reg"); else phy_reg = 0; debug("ZYNQ GEM: addr %x, phyaddr %x\n", reg, phy_reg); ret |= zynq_gem_initialize(NULL, reg, phy_reg, 0); } else { debug("ZYNQ GEM: Can't get base address\n"); return -1; } } } while (offset != -1); return ret; } #endif