Signed-off-by: Álvaro Fernández Rojas noltari@gmail.com --- v10: Introduce changes suggested by Daniel Schwierzeck: - Fix license identifiers. - Remove packet queue. - Move dma_prepare_rcv_buf to free_pkt. - Pad packets smaller than ETH_ZLEN. - Switch to live DM live tree. v9: introduce flow control improvements from bcm6348-eth: - introduce rx packets caching functionality from bcm6348-eth to fix flow control issues. - code style fixes. v8: introduce bcm6368-enet driver
drivers/net/Kconfig | 8 + drivers/net/Makefile | 1 + drivers/net/bcm6368-eth.c | 625 ++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 634 insertions(+) create mode 100644 drivers/net/bcm6368-eth.c
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig index 2b7cec8804..7044c6adf3 100644 --- a/drivers/net/Kconfig +++ b/drivers/net/Kconfig @@ -82,6 +82,14 @@ config BCM6348_ETH help This driver supports the BCM6348 Ethernet MAC.
+config BCM6368_ETH + bool "BCM6368 EMAC support" + depends on DM_ETH && ARCH_BMIPS + select DMA + select MII + help + This driver supports the BCM6368 Ethernet MAC. + config DWC_ETH_QOS bool "Synopsys DWC Ethernet QOS device support" depends on DM_ETH diff --git a/drivers/net/Makefile b/drivers/net/Makefile index 2647d4dd23..0dbfa03306 100644 --- a/drivers/net/Makefile +++ b/drivers/net/Makefile @@ -7,6 +7,7 @@ obj-$(CONFIG_ALTERA_TSE) += altera_tse.o obj-$(CONFIG_AG7XXX) += ag7xxx.o obj-$(CONFIG_ARMADA100_FEC) += armada100_fec.o obj-$(CONFIG_BCM6348_ETH) += bcm6348-eth.o +obj-$(CONFIG_BCM6368_ETH) += bcm6368-eth.o obj-$(CONFIG_DRIVER_AT91EMAC) += at91_emac.o obj-$(CONFIG_DRIVER_AX88180) += ax88180.o obj-$(CONFIG_BCM_SF2_ETH) += bcm-sf2-eth.o diff --git a/drivers/net/bcm6368-eth.c b/drivers/net/bcm6368-eth.c new file mode 100644 index 0000000000..a31efba9d1 --- /dev/null +++ b/drivers/net/bcm6368-eth.c @@ -0,0 +1,625 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2018 Álvaro Fernández Rojas noltari@gmail.com + * + * Derived from linux/drivers/net/ethernet/broadcom/bcm63xx_enet.c: + * Copyright (C) 2008 Maxime Bizon mbizon@freebox.fr + */ + +#include <common.h> +#include <clk.h> +#include <dm.h> +#include <dma.h> +#include <miiphy.h> +#include <net.h> +#include <reset.h> +#include <wait_bit.h> +#include <asm/io.h> + +#define ETH_PORT_STR "brcm,enetsw-port" + +#define ETH_RX_DESC PKTBUFSRX +#define ETH_ZLEN 60 +#define ETH_TIMEOUT 100 + +#define ETH_MAX_PORT 8 +#define ETH_RGMII_PORT0 4 + +/* Port traffic control */ +#define ETH_PTCTRL_REG(x) (0x0 + (x)) +#define ETH_PTCTRL_RXDIS_SHIFT 0 +#define ETH_PTCTRL_RXDIS_MASK (1 << ETH_PTCTRL_RXDIS_SHIFT) +#define ETH_PTCTRL_TXDIS_SHIFT 1 +#define ETH_PTCTRL_TXDIS_MASK (1 << ETH_PTCTRL_TXDIS_SHIFT) + +/* Switch mode register */ +#define ETH_SWMODE_REG 0xb +#define ETH_SWMODE_FWD_EN_SHIFT 1 +#define ETH_SWMODE_FWD_EN_MASK (1 << ETH_SWMODE_FWD_EN_SHIFT) + +/* IMP override Register */ +#define ETH_IMPOV_REG 0xe +#define ETH_IMPOV_LINKUP_SHIFT 0 +#define ETH_IMPOV_LINKUP_MASK (1 << ETH_IMPOV_LINKUP_SHIFT) +#define ETH_IMPOV_FDX_SHIFT 1 +#define ETH_IMPOV_FDX_MASK (1 << ETH_IMPOV_FDX_SHIFT) +#define ETH_IMPOV_100_SHIFT 2 +#define ETH_IMPOV_100_MASK (1 << ETH_IMPOV_100_SHIFT) +#define ETH_IMPOV_1000_SHIFT 3 +#define ETH_IMPOV_1000_MASK (1 << ETH_IMPOV_1000_SHIFT) +#define ETH_IMPOV_RXFLOW_SHIFT 4 +#define ETH_IMPOV_RXFLOW_MASK (1 << ETH_IMPOV_RXFLOW_SHIFT) +#define ETH_IMPOV_TXFLOW_SHIFT 5 +#define ETH_IMPOV_TXFLOW_MASK (1 << ETH_IMPOV_TXFLOW_SHIFT) +#define ETH_IMPOV_FORCE_SHIFT 7 +#define ETH_IMPOV_FORCE_MASK (1 << ETH_IMPOV_FORCE_SHIFT) + +/* Port override Register */ +#define ETH_PORTOV_REG(x) (0x58 + (x)) +#define ETH_PORTOV_LINKUP_SHIFT 0 +#define ETH_PORTOV_LINKUP_MASK (1 << ETH_PORTOV_LINKUP_SHIFT) +#define ETH_PORTOV_FDX_SHIFT 1 +#define ETH_PORTOV_FDX_MASK (1 << ETH_PORTOV_FDX_SHIFT) +#define ETH_PORTOV_100_SHIFT 2 +#define ETH_PORTOV_100_MASK (1 << ETH_PORTOV_100_SHIFT) +#define ETH_PORTOV_1000_SHIFT 3 +#define ETH_PORTOV_1000_MASK (1 << ETH_PORTOV_1000_SHIFT) +#define ETH_PORTOV_RXFLOW_SHIFT 4 +#define ETH_PORTOV_RXFLOW_MASK (1 << ETH_PORTOV_RXFLOW_SHIFT) +#define ETH_PORTOV_TXFLOW_SHIFT 5 +#define ETH_PORTOV_TXFLOW_MASK (1 << ETH_PORTOV_TXFLOW_SHIFT) +#define ETH_PORTOV_ENABLE_SHIFT 6 +#define ETH_PORTOV_ENABLE_MASK (1 << ETH_PORTOV_ENABLE_SHIFT) + +/* Port RGMII control register */ +#define ETH_RGMII_CTRL_REG(x) (0x60 + (x)) +#define ETH_RGMII_CTRL_GMII_CLK_EN (1 << 7) +#define ETH_RGMII_CTRL_MII_OVERRIDE_EN (1 << 6) +#define ETH_RGMII_CTRL_MII_MODE_MASK (3 << 4) +#define ETH_RGMII_CTRL_RGMII_MODE (0 << 4) +#define ETH_RGMII_CTRL_MII_MODE (1 << 4) +#define ETH_RGMII_CTRL_RVMII_MODE (2 << 4) +#define ETH_RGMII_CTRL_TIMING_SEL_EN (1 << 0) + +/* Port RGMII timing register */ +#define ENETSW_RGMII_TIMING_REG(x) (0x68 + (x)) + +/* MDIO control register */ +#define MII_SC_REG 0xb0 +#define MII_SC_EXT_SHIFT 16 +#define MII_SC_EXT_MASK (1 << MII_SC_EXT_SHIFT) +#define MII_SC_REG_SHIFT 20 +#define MII_SC_PHYID_SHIFT 25 +#define MII_SC_RD_SHIFT 30 +#define MII_SC_RD_MASK (1 << MII_SC_RD_SHIFT) +#define MII_SC_WR_SHIFT 31 +#define MII_SC_WR_MASK (1 << MII_SC_WR_SHIFT) + +/* MDIO data register */ +#define MII_DAT_REG 0xb4 + +/* Global Management Configuration Register */ +#define ETH_GMCR_REG 0x200 +#define ETH_GMCR_RST_MIB_SHIFT 0 +#define ETH_GMCR_RST_MIB_MASK (1 << ETH_GMCR_RST_MIB_SHIFT) + +/* Jumbo control register port mask register */ +#define ETH_JMBCTL_PORT_REG 0x4004 + +/* Jumbo control mib good frame register */ +#define ETH_JMBCTL_MAXSIZE_REG 0x4008 + +/* ETH port data */ +struct bcm_enetsw_port { + bool used; + const char *name; + /* Config */ + bool bypass_link; + int force_speed; + bool force_duplex_full; + /* PHY */ + int phy_id; +}; + +/* ETH data */ +struct bcm6368_eth_priv { + void __iomem *base; + /* DMA */ + struct dma rx_dma; + struct dma tx_dma; + /* Ports */ + uint8_t num_ports; + struct bcm_enetsw_port used_ports[ETH_MAX_PORT]; + int sw_port_link[ETH_MAX_PORT]; + bool rgmii_override; + bool rgmii_timing; + /* PHY */ + int phy_id; +}; + +static inline bool bcm_enet_port_is_rgmii(int portid) +{ + return portid >= ETH_RGMII_PORT0; +} + +static int bcm6368_mdio_read(struct bcm6368_eth_priv *priv, uint8_t ext, + int phy_id, int reg) +{ + uint32_t val; + + writel_be(0, priv->base + MII_SC_REG); + + val = MII_SC_RD_MASK | + (phy_id << MII_SC_PHYID_SHIFT) | + (reg << MII_SC_REG_SHIFT); + + if (ext) + val |= MII_SC_EXT_MASK; + + writel_be(val, priv->base + MII_SC_REG); + udelay(50); + + return readw_be(priv->base + MII_DAT_REG); +} + +static int bcm6368_mdio_write(struct bcm6368_eth_priv *priv, uint8_t ext, + int phy_id, int reg, u16 data) +{ + uint32_t val; + + writel_be(0, priv->base + MII_SC_REG); + + val = MII_SC_WR_MASK | + (phy_id << MII_SC_PHYID_SHIFT) | + (reg << MII_SC_REG_SHIFT); + + if (ext) + val |= MII_SC_EXT_MASK; + + val |= data; + + writel_be(val, priv->base + MII_SC_REG); + udelay(50); + + return 0; +} + +static int bcm6368_eth_free_pkt(struct udevice *dev, uchar *packet, int len) +{ + struct bcm6368_eth_priv *priv = dev_get_priv(dev); + + return dma_prepare_rcv_buf(&priv->rx_dma, packet, len); +} + +static int bcm6368_eth_recv(struct udevice *dev, int flags, uchar **packetp) +{ + struct bcm6368_eth_priv *priv = dev_get_priv(dev); + + return dma_receive(&priv->rx_dma, (void**)packetp, NULL); +} + +static int bcm6368_eth_send(struct udevice *dev, void *packet, int length) +{ + struct bcm6368_eth_priv *priv = dev_get_priv(dev); + + /* pad packets smaller than ETH_ZLEN */ + if (length < ETH_ZLEN) { + memset(packet + length, 0, ETH_ZLEN - length); + length = ETH_ZLEN; + } + + return dma_send(&priv->tx_dma, packet, length, NULL); +} + +static int bcm6368_eth_adjust_link(struct udevice *dev) +{ + struct bcm6368_eth_priv *priv = dev_get_priv(dev); + unsigned int i; + + for (i = 0; i < priv->num_ports; i++) { + struct bcm_enetsw_port *port; + int val, j, up, adv, lpa, speed, duplex, media; + int external_phy = bcm_enet_port_is_rgmii(i); + u8 override; + + port = &priv->used_ports[i]; + if (!port->used) + continue; + + if (port->bypass_link) + continue; + + /* dummy read to clear */ + for (j = 0; j < 2; j++) + val = bcm6368_mdio_read(priv, external_phy, + port->phy_id, MII_BMSR); + + if (val == 0xffff) + continue; + + up = (val & BMSR_LSTATUS) ? 1 : 0; + if (!(up ^ priv->sw_port_link[i])) + continue; + + priv->sw_port_link[i] = up; + + /* link changed */ + if (!up) { + dev_info(&priv->pdev->dev, "link DOWN on %s\n", + port->name); + writeb_be(ETH_PORTOV_ENABLE_MASK, + priv->base + ETH_PORTOV_REG(i)); + writeb_be(ETH_PTCTRL_RXDIS_MASK | + ETH_PTCTRL_TXDIS_MASK, + priv->base + ETH_PTCTRL_REG(i)); + continue; + } + + adv = bcm6368_mdio_read(priv, external_phy, + port->phy_id, MII_ADVERTISE); + + lpa = bcm6368_mdio_read(priv, external_phy, port->phy_id, + MII_LPA); + + /* figure out media and duplex from advertise and LPA values */ + media = mii_nway_result(lpa & adv); + duplex = (media & ADVERTISE_FULL) ? 1 : 0; + + if (media & (ADVERTISE_100FULL | ADVERTISE_100HALF)) + speed = 100; + else + speed = 10; + + if (val & BMSR_ESTATEN) { + adv = bcm6368_mdio_read(priv, external_phy, + port->phy_id, MII_CTRL1000); + + lpa = bcm6368_mdio_read(priv, external_phy, + port->phy_id, MII_STAT1000); + + if ((adv & (ADVERTISE_1000FULL | ADVERTISE_1000HALF)) && + (lpa & (LPA_1000FULL | LPA_1000HALF))) { + speed = 1000; + duplex = (lpa & LPA_1000FULL); + } + } + + pr_alert("link UP on %s, %dMbps, %s-duplex\n", + port->name, speed, duplex ? "full" : "half"); + + override = ETH_PORTOV_ENABLE_MASK | + ETH_PORTOV_LINKUP_MASK; + + if (speed == 1000) + override |= ETH_PORTOV_1000_MASK; + else if (speed == 100) + override |= ETH_PORTOV_100_MASK; + if (duplex) + override |= ETH_PORTOV_FDX_MASK; + + writeb_be(override, priv->base + ETH_PORTOV_REG(i)); + writeb_be(0, priv->base + ETH_PTCTRL_REG(i)); + } + + return 0; +} + +static int bcm6368_eth_start(struct udevice *dev) +{ + struct bcm6368_eth_priv *priv = dev_get_priv(dev); + uint8_t i; + + /* prepare rx dma buffers */ + for (i = 0; i < ETH_RX_DESC; i++) { + int ret = dma_prepare_rcv_buf(&priv->rx_dma, net_rx_packets[i], + PKTSIZE_ALIGN); + if (ret < 0) + break; + } + + /* enable dma rx channel */ + dma_enable(&priv->rx_dma); + + /* enable dma tx channel */ + dma_enable(&priv->tx_dma); + + /* apply override config for bypass_link ports here. */ + for (i = 0; i < priv->num_ports; i++) { + struct bcm_enetsw_port *port; + u8 override; + + port = &priv->used_ports[i]; + if (!port->used) + continue; + + if (!port->bypass_link) + continue; + + override = ETH_PORTOV_ENABLE_MASK | + ETH_PORTOV_LINKUP_MASK; + + switch (port->force_speed) { + case 1000: + override |= ETH_PORTOV_1000_MASK; + break; + case 100: + override |= ETH_PORTOV_100_MASK; + break; + case 10: + break; + default: + pr_warn("%s: invalid forced speed on port %s\n", + __func__, port->name); + break; + } + + if (port->force_duplex_full) + override |= ETH_PORTOV_FDX_MASK; + + writeb_be(override, priv->base + ETH_PORTOV_REG(i)); + writeb_be(0, priv->base + ETH_PTCTRL_REG(i)); + } + + bcm6368_eth_adjust_link(dev); + + return 0; +} + +static void bcm6368_eth_stop(struct udevice *dev) +{ + struct bcm6368_eth_priv *priv = dev_get_priv(dev); + + /* disable dma rx channel */ + dma_disable(&priv->rx_dma); + + /* disable dma tx channel */ + dma_disable(&priv->tx_dma); +} + +static const struct eth_ops bcm6368_eth_ops = { + .free_pkt = bcm6368_eth_free_pkt, + .recv = bcm6368_eth_recv, + .send = bcm6368_eth_send, + .start = bcm6368_eth_start, + .stop = bcm6368_eth_stop, +}; + +static const struct udevice_id bcm6368_eth_ids[] = { + { .compatible = "brcm,bcm6368-enet", }, + { /* sentinel */ } +}; + +static bool bcm6368_phy_is_external(struct bcm6368_eth_priv *priv, int phy_id) +{ + uint8_t i; + + for (i = 0; i < priv->num_ports; ++i) { + if (!priv->used_ports[i].used) + continue; + if (priv->used_ports[i].phy_id == phy_id) + return bcm_enet_port_is_rgmii(i); + } + + return true; +} + +static int bcm6368_mii_mdio_read(struct mii_dev *bus, int addr, int devaddr, + int reg) +{ + struct bcm6368_eth_priv *priv = bus->priv; + bool ext = bcm6368_phy_is_external(priv, addr); + + return bcm6368_mdio_read(priv, ext, addr, reg); +} + +static int bcm6368_mii_mdio_write(struct mii_dev *bus, int addr, int devaddr, + int reg, u16 data) +{ + struct bcm6368_eth_priv *priv = bus->priv; + bool ext = bcm6368_phy_is_external(priv, addr); + + return bcm6368_mdio_write(priv, ext, addr, reg, data); +} + +static int bcm6368_mdio_init(const char *name, struct bcm6368_eth_priv *priv) +{ + struct mii_dev *bus; + + bus = mdio_alloc(); + if (!bus) { + pr_err("%s: failed to allocate MDIO bus\n", __func__); + return -ENOMEM; + } + + bus->read = bcm6368_mii_mdio_read; + bus->write = bcm6368_mii_mdio_write; + bus->priv = priv; + snprintf(bus->name, sizeof(bus->name), "%s", name); + + return mdio_register(bus); +} + +static int bcm6368_eth_probe(struct udevice *dev) +{ + struct eth_pdata *pdata = dev_get_platdata(dev); + struct bcm6368_eth_priv *priv = dev_get_priv(dev); + int num_ports, ret, i; + uint32_t val; + ofnode node; + + /* get base address */ + priv->base = dev_remap_addr(dev); + if (!priv->base) + return -EINVAL; + pdata->iobase = (phys_addr_t) priv->base; + + /* get number of ports */ + num_ports = dev_read_u32_default(dev, "brcm,num-ports", ETH_MAX_PORT); + if (!num_ports || num_ports > ETH_MAX_PORT) + return -EINVAL; + + /* get dma channels */ + ret = dma_get_by_name(dev, "tx", &priv->tx_dma); + if (ret) + return -EINVAL; + + ret = dma_get_by_name(dev, "rx", &priv->rx_dma); + if (ret) + return -EINVAL; + + /* try to enable clocks */ + for (i = 0; ; i++) { + struct clk clk; + int ret; + + ret = clk_get_by_index(dev, i, &clk); + if (ret < 0) + break; + + ret = clk_enable(&clk); + if (ret < 0) { + pr_err("%s: error enabling clock %d\n", __func__, i); + return ret; + } + + ret = clk_free(&clk); + if (ret < 0) { + pr_err("%s: error freeing clock %d\n", __func__, i); + return ret; + } + } + + /* try to perform resets */ + for (i = 0; ; i++) { + struct reset_ctl reset; + int ret; + + ret = reset_get_by_index(dev, i, &reset); + if (ret < 0) + break; + + ret = reset_deassert(&reset); + if (ret < 0) { + pr_err("%s: error deasserting reset %d\n", __func__, i); + return ret; + } + + ret = reset_free(&reset); + if (ret < 0) { + pr_err("%s: error freeing reset %d\n", __func__, i); + return ret; + } + } + + /* set priv data */ + priv->num_ports = num_ports; + if (dev_read_bool(dev, "brcm,rgmii-override")) + priv->rgmii_override = true; + if (dev_read_bool(dev, "brcm,rgmii-timing")) + priv->rgmii_timing = true; + + /* get ports */ + dev_for_each_subnode(node, dev) { + const char *comp; + const char *label; + unsigned int p; + int phy_id; + int speed; + + comp = ofnode_read_string(node, "compatible"); + if (!comp || memcmp(comp, ETH_PORT_STR, sizeof(ETH_PORT_STR))) + continue; + + p = ofnode_read_u32_default(node, "reg", ETH_MAX_PORT); + if (p >= num_ports) + return -EINVAL; + + label = ofnode_read_string(node, "label"); + if (!label) { + debug("%s: node %s has no label\n", __func__, + ofnode_get_name(node)); + return -EINVAL; + } + + phy_id = ofnode_read_u32_default(node, "brcm,phy-id", -1); + + priv->used_ports[p].used = true; + priv->used_ports[p].name = label; + priv->used_ports[p].phy_id = phy_id; + + if (ofnode_read_bool(node, "full-duplex")) + priv->used_ports[p].force_duplex_full = true; + if (ofnode_read_bool(node, "bypass-link")) + priv->used_ports[p].bypass_link = true; + speed = ofnode_read_u32_default(node, "speed", 0); + if (speed) + priv->used_ports[p].force_speed = speed; + } + + /* init mii bus */ + ret = bcm6368_mdio_init(dev->name, priv); + if (ret) + return ret; + + /* disable all ports */ + for (i = 0; i < priv->num_ports; i++) { + writeb_be(ETH_PORTOV_ENABLE_MASK, + priv->base + ETH_PORTOV_REG(i)); + writeb_be(ETH_PTCTRL_RXDIS_MASK | + ETH_PTCTRL_TXDIS_MASK, + priv->base + ETH_PTCTRL_REG(i)); + + priv->sw_port_link[i] = 0; + } + + /* enable external ports */ + for (i = ETH_RGMII_PORT0; i < priv->num_ports; i++) { + u8 rgmii_ctrl; + + if (!priv->used_ports[i].used) + continue; + + rgmii_ctrl = readb_be(priv->base + ETH_RGMII_CTRL_REG(i)); + rgmii_ctrl |= ETH_RGMII_CTRL_GMII_CLK_EN; + if (priv->rgmii_override) + rgmii_ctrl |= ETH_RGMII_CTRL_MII_OVERRIDE_EN; + if (priv->rgmii_timing) + rgmii_ctrl |= ETH_RGMII_CTRL_TIMING_SEL_EN; + writeb_be(rgmii_ctrl, priv->base + ETH_RGMII_CTRL_REG(i)); + } + + /* reset mib */ + val = readb_be(priv->base + ETH_GMCR_REG); + val |= ETH_GMCR_RST_MIB_MASK; + writeb_be(val, priv->base + ETH_GMCR_REG); + mdelay(1); + val &= ~ETH_GMCR_RST_MIB_MASK; + writeb_be(val, priv->base + ETH_GMCR_REG); + mdelay(1); + + /* force CPU port state */ + val = readb_be(priv->base + ETH_IMPOV_REG); + val |= ETH_IMPOV_FORCE_MASK | ETH_IMPOV_LINKUP_MASK; + writeb_be(val, priv->base + ETH_IMPOV_REG); + + /* enable switch forward engine */ + val = readb_be(priv->base + ETH_SWMODE_REG); + val |= ETH_SWMODE_FWD_EN_MASK; + writeb_be(val, priv->base + ETH_SWMODE_REG); + + /* enable jumbo on all ports */ + writel_be(0x1ff, priv->base + ETH_JMBCTL_PORT_REG); + writew_be(9728, priv->base + ETH_JMBCTL_MAXSIZE_REG); + + return 0; +} + +U_BOOT_DRIVER(bcm6368_eth) = { + .name = "bcm6368_eth", + .id = UCLASS_ETH, + .of_match = bcm6368_eth_ids, + .ops = &bcm6368_eth_ops, + .platdata_auto_alloc_size = sizeof(struct eth_pdata), + .priv_auto_alloc_size = sizeof(struct bcm6368_eth_priv), + .probe = bcm6368_eth_probe, +};