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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /drivers/net/dsa/bcm_sf2.c | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 4.19.249.upstream/4.19.249upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/net/dsa/bcm_sf2.c')
-rw-r--r-- | drivers/net/dsa/bcm_sf2.c | 1248 |
1 files changed, 1248 insertions, 0 deletions
diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c new file mode 100644 index 000000000..3deda0321 --- /dev/null +++ b/drivers/net/dsa/bcm_sf2.c @@ -0,0 +1,1248 @@ +/* + * Broadcom Starfighter 2 DSA switch driver + * + * Copyright (C) 2014, Broadcom Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <linux/list.h> +#include <linux/module.h> +#include <linux/netdevice.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/phy.h> +#include <linux/phy_fixed.h> +#include <linux/phylink.h> +#include <linux/mii.h> +#include <linux/of.h> +#include <linux/of_irq.h> +#include <linux/of_address.h> +#include <linux/of_net.h> +#include <linux/of_mdio.h> +#include <net/dsa.h> +#include <linux/ethtool.h> +#include <linux/if_bridge.h> +#include <linux/brcmphy.h> +#include <linux/etherdevice.h> +#include <linux/platform_data/b53.h> + +#include "bcm_sf2.h" +#include "bcm_sf2_regs.h" +#include "b53/b53_priv.h" +#include "b53/b53_regs.h" + +static void bcm_sf2_imp_setup(struct dsa_switch *ds, int port) +{ + struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); + unsigned int i; + u32 reg, offset; + + /* Enable the port memories */ + reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL); + reg &= ~P_TXQ_PSM_VDD(port); + core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL); + + /* Enable forwarding */ + core_writel(priv, SW_FWDG_EN, CORE_SWMODE); + + /* Enable IMP port in dumb mode */ + reg = core_readl(priv, CORE_SWITCH_CTRL); + reg |= MII_DUMB_FWDG_EN; + core_writel(priv, reg, CORE_SWITCH_CTRL); + + /* Configure Traffic Class to QoS mapping, allow each priority to map + * to a different queue number + */ + reg = core_readl(priv, CORE_PORT_TC2_QOS_MAP_PORT(port)); + for (i = 0; i < SF2_NUM_EGRESS_QUEUES; i++) + reg |= i << (PRT_TO_QID_SHIFT * i); + core_writel(priv, reg, CORE_PORT_TC2_QOS_MAP_PORT(port)); + + b53_brcm_hdr_setup(ds, port); + + if (port == 8) { + if (priv->type == BCM7445_DEVICE_ID) + offset = CORE_STS_OVERRIDE_IMP; + else + offset = CORE_STS_OVERRIDE_IMP2; + + /* Force link status for IMP port */ + reg = core_readl(priv, offset); + reg |= (MII_SW_OR | LINK_STS); + reg &= ~GMII_SPEED_UP_2G; + core_writel(priv, reg, offset); + + /* Enable Broadcast, Multicast, Unicast forwarding to IMP port */ + reg = core_readl(priv, CORE_IMP_CTL); + reg |= (RX_BCST_EN | RX_MCST_EN | RX_UCST_EN); + reg &= ~(RX_DIS | TX_DIS); + core_writel(priv, reg, CORE_IMP_CTL); + } else { + reg = core_readl(priv, CORE_G_PCTL_PORT(port)); + reg &= ~(RX_DIS | TX_DIS); + core_writel(priv, reg, CORE_G_PCTL_PORT(port)); + } +} + +static void bcm_sf2_gphy_enable_set(struct dsa_switch *ds, bool enable) +{ + struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); + u32 reg; + + reg = reg_readl(priv, REG_SPHY_CNTRL); + if (enable) { + reg |= PHY_RESET; + reg &= ~(EXT_PWR_DOWN | IDDQ_BIAS | IDDQ_GLOBAL_PWR | CK25_DIS); + reg_writel(priv, reg, REG_SPHY_CNTRL); + udelay(21); + reg = reg_readl(priv, REG_SPHY_CNTRL); + reg &= ~PHY_RESET; + } else { + reg |= EXT_PWR_DOWN | IDDQ_BIAS | PHY_RESET; + reg_writel(priv, reg, REG_SPHY_CNTRL); + mdelay(1); + reg |= CK25_DIS; + } + reg_writel(priv, reg, REG_SPHY_CNTRL); + + /* Use PHY-driven LED signaling */ + if (!enable) { + reg = reg_readl(priv, REG_LED_CNTRL(0)); + reg |= SPDLNK_SRC_SEL; + reg_writel(priv, reg, REG_LED_CNTRL(0)); + } +} + +static inline void bcm_sf2_port_intr_enable(struct bcm_sf2_priv *priv, + int port) +{ + unsigned int off; + + switch (port) { + case 7: + off = P7_IRQ_OFF; + break; + case 0: + /* Port 0 interrupts are located on the first bank */ + intrl2_0_mask_clear(priv, P_IRQ_MASK(P0_IRQ_OFF)); + return; + default: + off = P_IRQ_OFF(port); + break; + } + + intrl2_1_mask_clear(priv, P_IRQ_MASK(off)); +} + +static inline void bcm_sf2_port_intr_disable(struct bcm_sf2_priv *priv, + int port) +{ + unsigned int off; + + switch (port) { + case 7: + off = P7_IRQ_OFF; + break; + case 0: + /* Port 0 interrupts are located on the first bank */ + intrl2_0_mask_set(priv, P_IRQ_MASK(P0_IRQ_OFF)); + intrl2_0_writel(priv, P_IRQ_MASK(P0_IRQ_OFF), INTRL2_CPU_CLEAR); + return; + default: + off = P_IRQ_OFF(port); + break; + } + + intrl2_1_mask_set(priv, P_IRQ_MASK(off)); + intrl2_1_writel(priv, P_IRQ_MASK(off), INTRL2_CPU_CLEAR); +} + +static int bcm_sf2_port_setup(struct dsa_switch *ds, int port, + struct phy_device *phy) +{ + struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); + unsigned int i; + u32 reg; + + /* Clear the memory power down */ + reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL); + reg &= ~P_TXQ_PSM_VDD(port); + core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL); + + /* Enable Broadcom tags for that port if requested */ + if (priv->brcm_tag_mask & BIT(port)) + b53_brcm_hdr_setup(ds, port); + + /* Configure Traffic Class to QoS mapping, allow each priority to map + * to a different queue number + */ + reg = core_readl(priv, CORE_PORT_TC2_QOS_MAP_PORT(port)); + for (i = 0; i < SF2_NUM_EGRESS_QUEUES; i++) + reg |= i << (PRT_TO_QID_SHIFT * i); + core_writel(priv, reg, CORE_PORT_TC2_QOS_MAP_PORT(port)); + + /* Re-enable the GPHY and re-apply workarounds */ + if (priv->int_phy_mask & 1 << port && priv->hw_params.num_gphy == 1) { + bcm_sf2_gphy_enable_set(ds, true); + if (phy) { + /* if phy_stop() has been called before, phy + * will be in halted state, and phy_start() + * will call resume. + * + * the resume path does not configure back + * autoneg settings, and since we hard reset + * the phy manually here, we need to reset the + * state machine also. + */ + phy->state = PHY_READY; + phy_init_hw(phy); + } + } + + /* Enable MoCA port interrupts to get notified */ + if (port == priv->moca_port) + bcm_sf2_port_intr_enable(priv, port); + + /* Set per-queue pause threshold to 32 */ + core_writel(priv, 32, CORE_TXQ_THD_PAUSE_QN_PORT(port)); + + /* Set ACB threshold to 24 */ + for (i = 0; i < SF2_NUM_EGRESS_QUEUES; i++) { + reg = acb_readl(priv, ACB_QUEUE_CFG(port * + SF2_NUM_EGRESS_QUEUES + i)); + reg &= ~XOFF_THRESHOLD_MASK; + reg |= 24; + acb_writel(priv, reg, ACB_QUEUE_CFG(port * + SF2_NUM_EGRESS_QUEUES + i)); + } + + return b53_enable_port(ds, port, phy); +} + +static void bcm_sf2_port_disable(struct dsa_switch *ds, int port, + struct phy_device *phy) +{ + struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); + u32 reg; + + /* Disable learning while in WoL mode */ + if (priv->wol_ports_mask & (1 << port)) { + reg = core_readl(priv, CORE_DIS_LEARN); + reg |= BIT(port); + core_writel(priv, reg, CORE_DIS_LEARN); + return; + } + + if (port == priv->moca_port) + bcm_sf2_port_intr_disable(priv, port); + + if (priv->int_phy_mask & 1 << port && priv->hw_params.num_gphy == 1) + bcm_sf2_gphy_enable_set(ds, false); + + b53_disable_port(ds, port, phy); + + /* Power down the port memory */ + reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL); + reg |= P_TXQ_PSM_VDD(port); + core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL); +} + + +static int bcm_sf2_sw_indir_rw(struct bcm_sf2_priv *priv, int op, int addr, + int regnum, u16 val) +{ + int ret = 0; + u32 reg; + + reg = reg_readl(priv, REG_SWITCH_CNTRL); + reg |= MDIO_MASTER_SEL; + reg_writel(priv, reg, REG_SWITCH_CNTRL); + + /* Page << 8 | offset */ + reg = 0x70; + reg <<= 2; + core_writel(priv, addr, reg); + + /* Page << 8 | offset */ + reg = 0x80 << 8 | regnum << 1; + reg <<= 2; + + if (op) + ret = core_readl(priv, reg); + else + core_writel(priv, val, reg); + + reg = reg_readl(priv, REG_SWITCH_CNTRL); + reg &= ~MDIO_MASTER_SEL; + reg_writel(priv, reg, REG_SWITCH_CNTRL); + + return ret & 0xffff; +} + +static int bcm_sf2_sw_mdio_read(struct mii_bus *bus, int addr, int regnum) +{ + struct bcm_sf2_priv *priv = bus->priv; + + /* Intercept reads from Broadcom pseudo-PHY address, else, send + * them to our master MDIO bus controller + */ + if (addr == BRCM_PSEUDO_PHY_ADDR && priv->indir_phy_mask & BIT(addr)) + return bcm_sf2_sw_indir_rw(priv, 1, addr, regnum, 0); + else + return mdiobus_read_nested(priv->master_mii_bus, addr, regnum); +} + +static int bcm_sf2_sw_mdio_write(struct mii_bus *bus, int addr, int regnum, + u16 val) +{ + struct bcm_sf2_priv *priv = bus->priv; + + /* Intercept writes to the Broadcom pseudo-PHY address, else, + * send them to our master MDIO bus controller + */ + if (addr == BRCM_PSEUDO_PHY_ADDR && priv->indir_phy_mask & BIT(addr)) + return bcm_sf2_sw_indir_rw(priv, 0, addr, regnum, val); + else + return mdiobus_write_nested(priv->master_mii_bus, addr, + regnum, val); +} + +static irqreturn_t bcm_sf2_switch_0_isr(int irq, void *dev_id) +{ + struct dsa_switch *ds = dev_id; + struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); + + priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) & + ~priv->irq0_mask; + intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR); + + return IRQ_HANDLED; +} + +static irqreturn_t bcm_sf2_switch_1_isr(int irq, void *dev_id) +{ + struct dsa_switch *ds = dev_id; + struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); + + priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) & + ~priv->irq1_mask; + intrl2_1_writel(priv, priv->irq1_stat, INTRL2_CPU_CLEAR); + + if (priv->irq1_stat & P_LINK_UP_IRQ(P7_IRQ_OFF)) { + priv->port_sts[7].link = true; + dsa_port_phylink_mac_change(ds, 7, true); + } + if (priv->irq1_stat & P_LINK_DOWN_IRQ(P7_IRQ_OFF)) { + priv->port_sts[7].link = false; + dsa_port_phylink_mac_change(ds, 7, false); + } + + return IRQ_HANDLED; +} + +static int bcm_sf2_sw_rst(struct bcm_sf2_priv *priv) +{ + unsigned int timeout = 1000; + u32 reg; + + reg = core_readl(priv, CORE_WATCHDOG_CTRL); + reg |= SOFTWARE_RESET | EN_CHIP_RST | EN_SW_RESET; + core_writel(priv, reg, CORE_WATCHDOG_CTRL); + + do { + reg = core_readl(priv, CORE_WATCHDOG_CTRL); + if (!(reg & SOFTWARE_RESET)) + break; + + usleep_range(1000, 2000); + } while (timeout-- > 0); + + if (timeout == 0) + return -ETIMEDOUT; + + return 0; +} + +static void bcm_sf2_intr_disable(struct bcm_sf2_priv *priv) +{ + intrl2_0_mask_set(priv, 0xffffffff); + intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR); + intrl2_1_mask_set(priv, 0xffffffff); + intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR); +} + +static void bcm_sf2_identify_ports(struct bcm_sf2_priv *priv, + struct device_node *dn) +{ + struct device_node *port; + int mode; + unsigned int port_num; + + priv->moca_port = -1; + + for_each_available_child_of_node(dn, port) { + if (of_property_read_u32(port, "reg", &port_num)) + continue; + + /* Internal PHYs get assigned a specific 'phy-mode' property + * value: "internal" to help flag them before MDIO probing + * has completed, since they might be turned off at that + * time + */ + mode = of_get_phy_mode(port); + if (mode < 0) + continue; + + if (mode == PHY_INTERFACE_MODE_INTERNAL) + priv->int_phy_mask |= 1 << port_num; + + if (mode == PHY_INTERFACE_MODE_MOCA) + priv->moca_port = port_num; + + if (of_property_read_bool(port, "brcm,use-bcm-hdr")) + priv->brcm_tag_mask |= 1 << port_num; + } +} + +static int bcm_sf2_mdio_register(struct dsa_switch *ds) +{ + struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); + struct device_node *dn; + static int index; + int err; + + /* Find our integrated MDIO bus node */ + dn = of_find_compatible_node(NULL, NULL, "brcm,unimac-mdio"); + priv->master_mii_bus = of_mdio_find_bus(dn); + if (!priv->master_mii_bus) { + of_node_put(dn); + return -EPROBE_DEFER; + } + + get_device(&priv->master_mii_bus->dev); + priv->master_mii_dn = dn; + + priv->slave_mii_bus = devm_mdiobus_alloc(ds->dev); + if (!priv->slave_mii_bus) { + of_node_put(dn); + return -ENOMEM; + } + + priv->slave_mii_bus->priv = priv; + priv->slave_mii_bus->name = "sf2 slave mii"; + priv->slave_mii_bus->read = bcm_sf2_sw_mdio_read; + priv->slave_mii_bus->write = bcm_sf2_sw_mdio_write; + snprintf(priv->slave_mii_bus->id, MII_BUS_ID_SIZE, "sf2-%d", + index++); + priv->slave_mii_bus->dev.of_node = dn; + + /* Include the pseudo-PHY address to divert reads towards our + * workaround. This is only required for 7445D0, since 7445E0 + * disconnects the internal switch pseudo-PHY such that we can use the + * regular SWITCH_MDIO master controller instead. + * + * Here we flag the pseudo PHY as needing special treatment and would + * otherwise make all other PHY read/writes go to the master MDIO bus + * controller that comes with this switch backed by the "mdio-unimac" + * driver. + */ + if (of_machine_is_compatible("brcm,bcm7445d0")) + priv->indir_phy_mask |= (1 << BRCM_PSEUDO_PHY_ADDR); + else + priv->indir_phy_mask = 0; + + ds->phys_mii_mask = priv->indir_phy_mask; + ds->slave_mii_bus = priv->slave_mii_bus; + priv->slave_mii_bus->parent = ds->dev->parent; + priv->slave_mii_bus->phy_mask = ~priv->indir_phy_mask; + + err = mdiobus_register(priv->slave_mii_bus); + if (err && dn) + of_node_put(dn); + + return err; +} + +static void bcm_sf2_mdio_unregister(struct bcm_sf2_priv *priv) +{ + mdiobus_unregister(priv->slave_mii_bus); + if (priv->master_mii_dn) + of_node_put(priv->master_mii_dn); +} + +static u32 bcm_sf2_sw_get_phy_flags(struct dsa_switch *ds, int port) +{ + struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); + + /* The BCM7xxx PHY driver expects to find the integrated PHY revision + * in bits 15:8 and the patch level in bits 7:0 which is exactly what + * the REG_PHY_REVISION register layout is. + */ + if (priv->int_phy_mask & BIT(port)) + return priv->hw_params.gphy_rev; + else + return 0; +} + +static void bcm_sf2_sw_validate(struct dsa_switch *ds, int port, + unsigned long *supported, + struct phylink_link_state *state) +{ + __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, }; + + if (!phy_interface_mode_is_rgmii(state->interface) && + state->interface != PHY_INTERFACE_MODE_MII && + state->interface != PHY_INTERFACE_MODE_REVMII && + state->interface != PHY_INTERFACE_MODE_GMII && + state->interface != PHY_INTERFACE_MODE_INTERNAL && + state->interface != PHY_INTERFACE_MODE_MOCA) { + bitmap_zero(supported, __ETHTOOL_LINK_MODE_MASK_NBITS); + dev_err(ds->dev, + "Unsupported interface: %d\n", state->interface); + return; + } + + /* Allow all the expected bits */ + phylink_set(mask, Autoneg); + phylink_set_port_modes(mask); + phylink_set(mask, Pause); + phylink_set(mask, Asym_Pause); + + /* With the exclusion of MII and Reverse MII, we support Gigabit, + * including Half duplex + */ + if (state->interface != PHY_INTERFACE_MODE_MII && + state->interface != PHY_INTERFACE_MODE_REVMII) { + phylink_set(mask, 1000baseT_Full); + phylink_set(mask, 1000baseT_Half); + } + + phylink_set(mask, 10baseT_Half); + phylink_set(mask, 10baseT_Full); + phylink_set(mask, 100baseT_Half); + phylink_set(mask, 100baseT_Full); + + bitmap_and(supported, supported, mask, + __ETHTOOL_LINK_MODE_MASK_NBITS); + bitmap_and(state->advertising, state->advertising, mask, + __ETHTOOL_LINK_MODE_MASK_NBITS); +} + +static void bcm_sf2_sw_mac_config(struct dsa_switch *ds, int port, + unsigned int mode, + const struct phylink_link_state *state) +{ + struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); + u32 id_mode_dis = 0, port_mode; + u32 reg, offset; + + if (priv->type == BCM7445_DEVICE_ID) + offset = CORE_STS_OVERRIDE_GMIIP_PORT(port); + else + offset = CORE_STS_OVERRIDE_GMIIP2_PORT(port); + + switch (state->interface) { + case PHY_INTERFACE_MODE_RGMII: + id_mode_dis = 1; + /* fallthrough */ + case PHY_INTERFACE_MODE_RGMII_TXID: + port_mode = EXT_GPHY; + break; + case PHY_INTERFACE_MODE_MII: + port_mode = EXT_EPHY; + break; + case PHY_INTERFACE_MODE_REVMII: + port_mode = EXT_REVMII; + break; + default: + /* all other PHYs: internal and MoCA */ + goto force_link; + } + + /* Clear id_mode_dis bit, and the existing port mode, let + * RGMII_MODE_EN bet set by mac_link_{up,down} + */ + reg = reg_readl(priv, REG_RGMII_CNTRL_P(port)); + reg &= ~ID_MODE_DIS; + reg &= ~(PORT_MODE_MASK << PORT_MODE_SHIFT); + reg &= ~(RX_PAUSE_EN | TX_PAUSE_EN); + + reg |= port_mode; + if (id_mode_dis) + reg |= ID_MODE_DIS; + + if (state->pause & MLO_PAUSE_TXRX_MASK) { + if (state->pause & MLO_PAUSE_TX) + reg |= TX_PAUSE_EN; + reg |= RX_PAUSE_EN; + } + + reg_writel(priv, reg, REG_RGMII_CNTRL_P(port)); + +force_link: + /* Force link settings detected from the PHY */ + reg = SW_OVERRIDE; + switch (state->speed) { + case SPEED_1000: + reg |= SPDSTS_1000 << SPEED_SHIFT; + break; + case SPEED_100: + reg |= SPDSTS_100 << SPEED_SHIFT; + break; + } + + if (state->link) + reg |= LINK_STS; + if (state->duplex == DUPLEX_FULL) + reg |= DUPLX_MODE; + + core_writel(priv, reg, offset); +} + +static void bcm_sf2_sw_mac_link_set(struct dsa_switch *ds, int port, + phy_interface_t interface, bool link) +{ + struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); + u32 reg; + + if (!phy_interface_mode_is_rgmii(interface) && + interface != PHY_INTERFACE_MODE_MII && + interface != PHY_INTERFACE_MODE_REVMII) + return; + + /* If the link is down, just disable the interface to conserve power */ + reg = reg_readl(priv, REG_RGMII_CNTRL_P(port)); + if (link) + reg |= RGMII_MODE_EN; + else + reg &= ~RGMII_MODE_EN; + reg_writel(priv, reg, REG_RGMII_CNTRL_P(port)); +} + +static void bcm_sf2_sw_mac_link_down(struct dsa_switch *ds, int port, + unsigned int mode, + phy_interface_t interface) +{ + bcm_sf2_sw_mac_link_set(ds, port, interface, false); +} + +static void bcm_sf2_sw_mac_link_up(struct dsa_switch *ds, int port, + unsigned int mode, + phy_interface_t interface, + struct phy_device *phydev) +{ + struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); + struct ethtool_eee *p = &priv->dev->ports[port].eee; + + bcm_sf2_sw_mac_link_set(ds, port, interface, true); + + if (mode == MLO_AN_PHY && phydev) + p->eee_enabled = b53_eee_init(ds, port, phydev); +} + +static void bcm_sf2_sw_fixed_state(struct dsa_switch *ds, int port, + struct phylink_link_state *status) +{ + struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); + + status->link = false; + + /* MoCA port is special as we do not get link status from CORE_LNKSTS, + * which means that we need to force the link at the port override + * level to get the data to flow. We do use what the interrupt handler + * did determine before. + * + * For the other ports, we just force the link status, since this is + * a fixed PHY device. + */ + if (port == priv->moca_port) { + status->link = priv->port_sts[port].link; + /* For MoCA interfaces, also force a link down notification + * since some version of the user-space daemon (mocad) use + * cmd->autoneg to force the link, which messes up the PHY + * state machine and make it go in PHY_FORCING state instead. + */ + if (!status->link) + netif_carrier_off(ds->ports[port].slave); + status->duplex = DUPLEX_FULL; + } else { + status->link = true; + } +} + +static void bcm_sf2_enable_acb(struct dsa_switch *ds) +{ + struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); + u32 reg; + + /* Enable ACB globally */ + reg = acb_readl(priv, ACB_CONTROL); + reg |= (ACB_FLUSH_MASK << ACB_FLUSH_SHIFT); + acb_writel(priv, reg, ACB_CONTROL); + reg &= ~(ACB_FLUSH_MASK << ACB_FLUSH_SHIFT); + reg |= ACB_EN | ACB_ALGORITHM; + acb_writel(priv, reg, ACB_CONTROL); +} + +static int bcm_sf2_sw_suspend(struct dsa_switch *ds) +{ + struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); + unsigned int port; + + bcm_sf2_intr_disable(priv); + + /* Disable all ports physically present including the IMP + * port, the other ones have already been disabled during + * bcm_sf2_sw_setup + */ + for (port = 0; port < ds->num_ports; port++) { + if (dsa_is_user_port(ds, port) || dsa_is_cpu_port(ds, port)) + bcm_sf2_port_disable(ds, port, NULL); + } + + return 0; +} + +static int bcm_sf2_sw_resume(struct dsa_switch *ds) +{ + struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); + int ret; + + ret = bcm_sf2_sw_rst(priv); + if (ret) { + pr_err("%s: failed to software reset switch\n", __func__); + return ret; + } + + if (priv->hw_params.num_gphy == 1) + bcm_sf2_gphy_enable_set(ds, true); + + ds->ops->setup(ds); + + return 0; +} + +static void bcm_sf2_sw_get_wol(struct dsa_switch *ds, int port, + struct ethtool_wolinfo *wol) +{ + struct net_device *p = ds->ports[port].cpu_dp->master; + struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); + struct ethtool_wolinfo pwol = { }; + + /* Get the parent device WoL settings */ + if (p->ethtool_ops->get_wol) + p->ethtool_ops->get_wol(p, &pwol); + + /* Advertise the parent device supported settings */ + wol->supported = pwol.supported; + memset(&wol->sopass, 0, sizeof(wol->sopass)); + + if (pwol.wolopts & WAKE_MAGICSECURE) + memcpy(&wol->sopass, pwol.sopass, sizeof(wol->sopass)); + + if (priv->wol_ports_mask & (1 << port)) + wol->wolopts = pwol.wolopts; + else + wol->wolopts = 0; +} + +static int bcm_sf2_sw_set_wol(struct dsa_switch *ds, int port, + struct ethtool_wolinfo *wol) +{ + struct net_device *p = ds->ports[port].cpu_dp->master; + struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); + s8 cpu_port = ds->ports[port].cpu_dp->index; + struct ethtool_wolinfo pwol = { }; + + if (p->ethtool_ops->get_wol) + p->ethtool_ops->get_wol(p, &pwol); + if (wol->wolopts & ~pwol.supported) + return -EINVAL; + + if (wol->wolopts) + priv->wol_ports_mask |= (1 << port); + else + priv->wol_ports_mask &= ~(1 << port); + + /* If we have at least one port enabled, make sure the CPU port + * is also enabled. If the CPU port is the last one enabled, we disable + * it since this configuration does not make sense. + */ + if (priv->wol_ports_mask && priv->wol_ports_mask != (1 << cpu_port)) + priv->wol_ports_mask |= (1 << cpu_port); + else + priv->wol_ports_mask &= ~(1 << cpu_port); + + return p->ethtool_ops->set_wol(p, wol); +} + +static int bcm_sf2_sw_setup(struct dsa_switch *ds) +{ + struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds); + unsigned int port; + + /* Enable all valid ports and disable those unused */ + for (port = 0; port < priv->hw_params.num_ports; port++) { + /* IMP port receives special treatment */ + if (dsa_is_user_port(ds, port)) + bcm_sf2_port_setup(ds, port, NULL); + else if (dsa_is_cpu_port(ds, port)) + bcm_sf2_imp_setup(ds, port); + else + bcm_sf2_port_disable(ds, port, NULL); + } + + b53_configure_vlan(ds); + bcm_sf2_enable_acb(ds); + + return 0; +} + +/* The SWITCH_CORE register space is managed by b53 but operates on a page + + * register basis so we need to translate that into an address that the + * bus-glue understands. + */ +#define SF2_PAGE_REG_MKADDR(page, reg) ((page) << 10 | (reg) << 2) + +static int bcm_sf2_core_read8(struct b53_device *dev, u8 page, u8 reg, + u8 *val) +{ + struct bcm_sf2_priv *priv = dev->priv; + + *val = core_readl(priv, SF2_PAGE_REG_MKADDR(page, reg)); + + return 0; +} + +static int bcm_sf2_core_read16(struct b53_device *dev, u8 page, u8 reg, + u16 *val) +{ + struct bcm_sf2_priv *priv = dev->priv; + + *val = core_readl(priv, SF2_PAGE_REG_MKADDR(page, reg)); + + return 0; +} + +static int bcm_sf2_core_read32(struct b53_device *dev, u8 page, u8 reg, + u32 *val) +{ + struct bcm_sf2_priv *priv = dev->priv; + + *val = core_readl(priv, SF2_PAGE_REG_MKADDR(page, reg)); + + return 0; +} + +static int bcm_sf2_core_read64(struct b53_device *dev, u8 page, u8 reg, + u64 *val) +{ + struct bcm_sf2_priv *priv = dev->priv; + + *val = core_readq(priv, SF2_PAGE_REG_MKADDR(page, reg)); + + return 0; +} + +static int bcm_sf2_core_write8(struct b53_device *dev, u8 page, u8 reg, + u8 value) +{ + struct bcm_sf2_priv *priv = dev->priv; + + core_writel(priv, value, SF2_PAGE_REG_MKADDR(page, reg)); + + return 0; +} + +static int bcm_sf2_core_write16(struct b53_device *dev, u8 page, u8 reg, + u16 value) +{ + struct bcm_sf2_priv *priv = dev->priv; + + core_writel(priv, value, SF2_PAGE_REG_MKADDR(page, reg)); + + return 0; +} + +static int bcm_sf2_core_write32(struct b53_device *dev, u8 page, u8 reg, + u32 value) +{ + struct bcm_sf2_priv *priv = dev->priv; + + core_writel(priv, value, SF2_PAGE_REG_MKADDR(page, reg)); + + return 0; +} + +static int bcm_sf2_core_write64(struct b53_device *dev, u8 page, u8 reg, + u64 value) +{ + struct bcm_sf2_priv *priv = dev->priv; + + core_writeq(priv, value, SF2_PAGE_REG_MKADDR(page, reg)); + + return 0; +} + +static const struct b53_io_ops bcm_sf2_io_ops = { + .read8 = bcm_sf2_core_read8, + .read16 = bcm_sf2_core_read16, + .read32 = bcm_sf2_core_read32, + .read48 = bcm_sf2_core_read64, + .read64 = bcm_sf2_core_read64, + .write8 = bcm_sf2_core_write8, + .write16 = bcm_sf2_core_write16, + .write32 = bcm_sf2_core_write32, + .write48 = bcm_sf2_core_write64, + .write64 = bcm_sf2_core_write64, +}; + +static const struct dsa_switch_ops bcm_sf2_ops = { + .get_tag_protocol = b53_get_tag_protocol, + .setup = bcm_sf2_sw_setup, + .get_strings = b53_get_strings, + .get_ethtool_stats = b53_get_ethtool_stats, + .get_sset_count = b53_get_sset_count, + .get_ethtool_phy_stats = b53_get_ethtool_phy_stats, + .get_phy_flags = bcm_sf2_sw_get_phy_flags, + .phylink_validate = bcm_sf2_sw_validate, + .phylink_mac_config = bcm_sf2_sw_mac_config, + .phylink_mac_link_down = bcm_sf2_sw_mac_link_down, + .phylink_mac_link_up = bcm_sf2_sw_mac_link_up, + .phylink_fixed_state = bcm_sf2_sw_fixed_state, + .suspend = bcm_sf2_sw_suspend, + .resume = bcm_sf2_sw_resume, + .get_wol = bcm_sf2_sw_get_wol, + .set_wol = bcm_sf2_sw_set_wol, + .port_enable = bcm_sf2_port_setup, + .port_disable = bcm_sf2_port_disable, + .get_mac_eee = b53_get_mac_eee, + .set_mac_eee = b53_set_mac_eee, + .port_bridge_join = b53_br_join, + .port_bridge_leave = b53_br_leave, + .port_stp_state_set = b53_br_set_stp_state, + .port_fast_age = b53_br_fast_age, + .port_vlan_filtering = b53_vlan_filtering, + .port_vlan_prepare = b53_vlan_prepare, + .port_vlan_add = b53_vlan_add, + .port_vlan_del = b53_vlan_del, + .port_fdb_dump = b53_fdb_dump, + .port_fdb_add = b53_fdb_add, + .port_fdb_del = b53_fdb_del, + .get_rxnfc = bcm_sf2_get_rxnfc, + .set_rxnfc = bcm_sf2_set_rxnfc, + .port_mirror_add = b53_mirror_add, + .port_mirror_del = b53_mirror_del, +}; + +struct bcm_sf2_of_data { + u32 type; + const u16 *reg_offsets; + unsigned int core_reg_align; + unsigned int num_cfp_rules; +}; + +/* Register offsets for the SWITCH_REG_* block */ +static const u16 bcm_sf2_7445_reg_offsets[] = { + [REG_SWITCH_CNTRL] = 0x00, + [REG_SWITCH_STATUS] = 0x04, + [REG_DIR_DATA_WRITE] = 0x08, + [REG_DIR_DATA_READ] = 0x0C, + [REG_SWITCH_REVISION] = 0x18, + [REG_PHY_REVISION] = 0x1C, + [REG_SPHY_CNTRL] = 0x2C, + [REG_RGMII_0_CNTRL] = 0x34, + [REG_RGMII_1_CNTRL] = 0x40, + [REG_RGMII_2_CNTRL] = 0x4c, + [REG_LED_0_CNTRL] = 0x90, + [REG_LED_1_CNTRL] = 0x94, + [REG_LED_2_CNTRL] = 0x98, +}; + +static const struct bcm_sf2_of_data bcm_sf2_7445_data = { + .type = BCM7445_DEVICE_ID, + .core_reg_align = 0, + .reg_offsets = bcm_sf2_7445_reg_offsets, + .num_cfp_rules = 256, +}; + +static const u16 bcm_sf2_7278_reg_offsets[] = { + [REG_SWITCH_CNTRL] = 0x00, + [REG_SWITCH_STATUS] = 0x04, + [REG_DIR_DATA_WRITE] = 0x08, + [REG_DIR_DATA_READ] = 0x0c, + [REG_SWITCH_REVISION] = 0x10, + [REG_PHY_REVISION] = 0x14, + [REG_SPHY_CNTRL] = 0x24, + [REG_RGMII_0_CNTRL] = 0xe0, + [REG_RGMII_1_CNTRL] = 0xec, + [REG_RGMII_2_CNTRL] = 0xf8, + [REG_LED_0_CNTRL] = 0x40, + [REG_LED_1_CNTRL] = 0x4c, + [REG_LED_2_CNTRL] = 0x58, +}; + +static const struct bcm_sf2_of_data bcm_sf2_7278_data = { + .type = BCM7278_DEVICE_ID, + .core_reg_align = 1, + .reg_offsets = bcm_sf2_7278_reg_offsets, + .num_cfp_rules = 128, +}; + +static const struct of_device_id bcm_sf2_of_match[] = { + { .compatible = "brcm,bcm7445-switch-v4.0", + .data = &bcm_sf2_7445_data + }, + { .compatible = "brcm,bcm7278-switch-v4.0", + .data = &bcm_sf2_7278_data + }, + { .compatible = "brcm,bcm7278-switch-v4.8", + .data = &bcm_sf2_7278_data + }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, bcm_sf2_of_match); + +static int bcm_sf2_sw_probe(struct platform_device *pdev) +{ + const char *reg_names[BCM_SF2_REGS_NUM] = BCM_SF2_REGS_NAME; + struct device_node *dn = pdev->dev.of_node; + const struct of_device_id *of_id = NULL; + const struct bcm_sf2_of_data *data; + struct b53_platform_data *pdata; + struct dsa_switch_ops *ops; + struct device_node *ports; + struct bcm_sf2_priv *priv; + struct b53_device *dev; + struct dsa_switch *ds; + void __iomem **base; + struct resource *r; + unsigned int i; + u32 reg, rev; + int ret; + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + ops = devm_kzalloc(&pdev->dev, sizeof(*ops), GFP_KERNEL); + if (!ops) + return -ENOMEM; + + dev = b53_switch_alloc(&pdev->dev, &bcm_sf2_io_ops, priv); + if (!dev) + return -ENOMEM; + + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return -ENOMEM; + + of_id = of_match_node(bcm_sf2_of_match, dn); + if (!of_id || !of_id->data) + return -EINVAL; + + data = of_id->data; + + /* Set SWITCH_REG register offsets and SWITCH_CORE align factor */ + priv->type = data->type; + priv->reg_offsets = data->reg_offsets; + priv->core_reg_align = data->core_reg_align; + priv->num_cfp_rules = data->num_cfp_rules; + + /* Auto-detection using standard registers will not work, so + * provide an indication of what kind of device we are for + * b53_common to work with + */ + pdata->chip_id = priv->type; + dev->pdata = pdata; + + priv->dev = dev; + ds = dev->ds; + ds->ops = &bcm_sf2_ops; + + /* Advertise the 8 egress queues */ + ds->num_tx_queues = SF2_NUM_EGRESS_QUEUES; + + dev_set_drvdata(&pdev->dev, priv); + + spin_lock_init(&priv->indir_lock); + mutex_init(&priv->stats_mutex); + mutex_init(&priv->cfp.lock); + + /* CFP rule #0 cannot be used for specific classifications, flag it as + * permanently used + */ + set_bit(0, priv->cfp.used); + set_bit(0, priv->cfp.unique); + + /* Balance of_node_put() done by of_find_node_by_name() */ + of_node_get(dn); + ports = of_find_node_by_name(dn, "ports"); + if (ports) { + bcm_sf2_identify_ports(priv, ports); + of_node_put(ports); + } + + priv->irq0 = irq_of_parse_and_map(dn, 0); + priv->irq1 = irq_of_parse_and_map(dn, 1); + + base = &priv->core; + for (i = 0; i < BCM_SF2_REGS_NUM; i++) { + r = platform_get_resource(pdev, IORESOURCE_MEM, i); + *base = devm_ioremap_resource(&pdev->dev, r); + if (IS_ERR(*base)) { + pr_err("unable to find register: %s\n", reg_names[i]); + return PTR_ERR(*base); + } + base++; + } + + ret = bcm_sf2_sw_rst(priv); + if (ret) { + pr_err("unable to software reset switch: %d\n", ret); + return ret; + } + + bcm_sf2_gphy_enable_set(priv->dev->ds, true); + + ret = bcm_sf2_mdio_register(ds); + if (ret) { + pr_err("failed to register MDIO bus\n"); + return ret; + } + + bcm_sf2_gphy_enable_set(priv->dev->ds, false); + + ret = bcm_sf2_cfp_rst(priv); + if (ret) { + pr_err("failed to reset CFP\n"); + goto out_mdio; + } + + /* Disable all interrupts and request them */ + bcm_sf2_intr_disable(priv); + + ret = devm_request_irq(&pdev->dev, priv->irq0, bcm_sf2_switch_0_isr, 0, + "switch_0", ds); + if (ret < 0) { + pr_err("failed to request switch_0 IRQ\n"); + goto out_mdio; + } + + ret = devm_request_irq(&pdev->dev, priv->irq1, bcm_sf2_switch_1_isr, 0, + "switch_1", ds); + if (ret < 0) { + pr_err("failed to request switch_1 IRQ\n"); + goto out_mdio; + } + + /* Reset the MIB counters */ + reg = core_readl(priv, CORE_GMNCFGCFG); + reg |= RST_MIB_CNT; + core_writel(priv, reg, CORE_GMNCFGCFG); + reg &= ~RST_MIB_CNT; + core_writel(priv, reg, CORE_GMNCFGCFG); + + /* Get the maximum number of ports for this switch */ + priv->hw_params.num_ports = core_readl(priv, CORE_IMP0_PRT_ID) + 1; + if (priv->hw_params.num_ports > DSA_MAX_PORTS) + priv->hw_params.num_ports = DSA_MAX_PORTS; + + /* Assume a single GPHY setup if we can't read that property */ + if (of_property_read_u32(dn, "brcm,num-gphy", + &priv->hw_params.num_gphy)) + priv->hw_params.num_gphy = 1; + + rev = reg_readl(priv, REG_SWITCH_REVISION); + priv->hw_params.top_rev = (rev >> SWITCH_TOP_REV_SHIFT) & + SWITCH_TOP_REV_MASK; + priv->hw_params.core_rev = (rev & SF2_REV_MASK); + + rev = reg_readl(priv, REG_PHY_REVISION); + priv->hw_params.gphy_rev = rev & PHY_REVISION_MASK; + + ret = b53_switch_register(dev); + if (ret) + goto out_mdio; + + pr_info("Starfighter 2 top: %x.%02x, core: %x.%02x base: 0x%p, IRQs: %d, %d\n", + priv->hw_params.top_rev >> 8, priv->hw_params.top_rev & 0xff, + priv->hw_params.core_rev >> 8, priv->hw_params.core_rev & 0xff, + priv->core, priv->irq0, priv->irq1); + + return 0; + +out_mdio: + bcm_sf2_mdio_unregister(priv); + return ret; +} + +static int bcm_sf2_sw_remove(struct platform_device *pdev) +{ + struct bcm_sf2_priv *priv = platform_get_drvdata(pdev); + + priv->wol_ports_mask = 0; + dsa_unregister_switch(priv->dev->ds); + /* Disable all ports and interrupts */ + bcm_sf2_sw_suspend(priv->dev->ds); + bcm_sf2_mdio_unregister(priv); + + return 0; +} + +static void bcm_sf2_sw_shutdown(struct platform_device *pdev) +{ + struct bcm_sf2_priv *priv = platform_get_drvdata(pdev); + + /* For a kernel about to be kexec'd we want to keep the GPHY on for a + * successful MDIO bus scan to occur. If we did turn off the GPHY + * before (e.g: port_disable), this will also power it back on. + * + * Do not rely on kexec_in_progress, just power the PHY on. + */ + if (priv->hw_params.num_gphy == 1) + bcm_sf2_gphy_enable_set(priv->dev->ds, true); +} + +#ifdef CONFIG_PM_SLEEP +static int bcm_sf2_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct bcm_sf2_priv *priv = platform_get_drvdata(pdev); + + return dsa_switch_suspend(priv->dev->ds); +} + +static int bcm_sf2_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct bcm_sf2_priv *priv = platform_get_drvdata(pdev); + + return dsa_switch_resume(priv->dev->ds); +} +#endif /* CONFIG_PM_SLEEP */ + +static SIMPLE_DEV_PM_OPS(bcm_sf2_pm_ops, + bcm_sf2_suspend, bcm_sf2_resume); + + +static struct platform_driver bcm_sf2_driver = { + .probe = bcm_sf2_sw_probe, + .remove = bcm_sf2_sw_remove, + .shutdown = bcm_sf2_sw_shutdown, + .driver = { + .name = "brcm-sf2", + .of_match_table = bcm_sf2_of_match, + .pm = &bcm_sf2_pm_ops, + }, +}; +module_platform_driver(bcm_sf2_driver); + +MODULE_AUTHOR("Broadcom Corporation"); +MODULE_DESCRIPTION("Driver for Broadcom Starfighter 2 ethernet switch chip"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:brcm-sf2"); |