222 lines
4.8 KiB
C
222 lines
4.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2011 - 2012 Cavium, Inc.
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*/
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#include <linux/module.h>
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#include <linux/phy.h>
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#include <linux/of.h>
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#define PHY_ID_BCM8706 0x0143bdc1
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#define PHY_ID_BCM8727 0x0143bff0
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#define BCM87XX_PMD_RX_SIGNAL_DETECT (MII_ADDR_C45 | 0x1000a)
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#define BCM87XX_10GBASER_PCS_STATUS (MII_ADDR_C45 | 0x30020)
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#define BCM87XX_XGXS_LANE_STATUS (MII_ADDR_C45 | 0x40018)
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#define BCM87XX_LASI_CONTROL (MII_ADDR_C45 | 0x39002)
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#define BCM87XX_LASI_STATUS (MII_ADDR_C45 | 0x39005)
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#if IS_ENABLED(CONFIG_OF_MDIO)
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/* Set and/or override some configuration registers based on the
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* broadcom,c45-reg-init property stored in the of_node for the phydev.
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*
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* broadcom,c45-reg-init = <devid reg mask value>,...;
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*
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* There may be one or more sets of <devid reg mask value>:
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*
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* devid: which sub-device to use.
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* reg: the register.
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* mask: if non-zero, ANDed with existing register value.
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* value: ORed with the masked value and written to the regiser.
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*
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*/
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static int bcm87xx_of_reg_init(struct phy_device *phydev)
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{
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const __be32 *paddr;
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const __be32 *paddr_end;
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int len, ret;
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if (!phydev->mdio.dev.of_node)
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return 0;
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paddr = of_get_property(phydev->mdio.dev.of_node,
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"broadcom,c45-reg-init", &len);
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if (!paddr)
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return 0;
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paddr_end = paddr + (len /= sizeof(*paddr));
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ret = 0;
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while (paddr + 3 < paddr_end) {
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u16 devid = be32_to_cpup(paddr++);
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u16 reg = be32_to_cpup(paddr++);
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u16 mask = be32_to_cpup(paddr++);
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u16 val_bits = be32_to_cpup(paddr++);
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u32 regnum = mdiobus_c45_addr(devid, reg);
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int val = 0;
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if (mask) {
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val = phy_read(phydev, regnum);
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if (val < 0) {
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ret = val;
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goto err;
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}
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val &= mask;
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}
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val |= val_bits;
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ret = phy_write(phydev, regnum, val);
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if (ret < 0)
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goto err;
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}
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err:
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return ret;
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}
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#else
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static int bcm87xx_of_reg_init(struct phy_device *phydev)
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{
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return 0;
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}
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#endif /* CONFIG_OF_MDIO */
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static int bcm87xx_get_features(struct phy_device *phydev)
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{
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linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseR_FEC_BIT,
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phydev->supported);
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return 0;
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}
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static int bcm87xx_config_init(struct phy_device *phydev)
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{
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return bcm87xx_of_reg_init(phydev);
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}
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static int bcm87xx_config_aneg(struct phy_device *phydev)
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{
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return -EINVAL;
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}
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static int bcm87xx_read_status(struct phy_device *phydev)
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{
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int rx_signal_detect;
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int pcs_status;
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int xgxs_lane_status;
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rx_signal_detect = phy_read(phydev, BCM87XX_PMD_RX_SIGNAL_DETECT);
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if (rx_signal_detect < 0)
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return rx_signal_detect;
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if ((rx_signal_detect & 1) == 0)
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goto no_link;
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pcs_status = phy_read(phydev, BCM87XX_10GBASER_PCS_STATUS);
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if (pcs_status < 0)
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return pcs_status;
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if ((pcs_status & 1) == 0)
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goto no_link;
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xgxs_lane_status = phy_read(phydev, BCM87XX_XGXS_LANE_STATUS);
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if (xgxs_lane_status < 0)
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return xgxs_lane_status;
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if ((xgxs_lane_status & 0x1000) == 0)
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goto no_link;
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phydev->speed = 10000;
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phydev->link = 1;
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phydev->duplex = 1;
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return 0;
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no_link:
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phydev->link = 0;
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return 0;
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}
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static int bcm87xx_config_intr(struct phy_device *phydev)
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{
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int reg, err;
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reg = phy_read(phydev, BCM87XX_LASI_CONTROL);
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if (reg < 0)
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return reg;
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if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
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err = phy_read(phydev, BCM87XX_LASI_STATUS);
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if (err)
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return err;
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reg |= 1;
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err = phy_write(phydev, BCM87XX_LASI_CONTROL, reg);
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} else {
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reg &= ~1;
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err = phy_write(phydev, BCM87XX_LASI_CONTROL, reg);
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if (err)
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return err;
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err = phy_read(phydev, BCM87XX_LASI_STATUS);
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}
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return err;
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}
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static irqreturn_t bcm87xx_handle_interrupt(struct phy_device *phydev)
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{
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int irq_status;
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irq_status = phy_read(phydev, BCM87XX_LASI_STATUS);
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if (irq_status < 0) {
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phy_error(phydev);
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return IRQ_NONE;
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}
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if (irq_status == 0)
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return IRQ_NONE;
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phy_trigger_machine(phydev);
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return IRQ_HANDLED;
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}
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static int bcm8706_match_phy_device(struct phy_device *phydev)
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{
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return phydev->c45_ids.device_ids[4] == PHY_ID_BCM8706;
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}
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static int bcm8727_match_phy_device(struct phy_device *phydev)
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{
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return phydev->c45_ids.device_ids[4] == PHY_ID_BCM8727;
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}
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static struct phy_driver bcm87xx_driver[] = {
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{
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.phy_id = PHY_ID_BCM8706,
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.phy_id_mask = 0xffffffff,
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.name = "Broadcom BCM8706",
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.get_features = bcm87xx_get_features,
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.config_init = bcm87xx_config_init,
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.config_aneg = bcm87xx_config_aneg,
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.read_status = bcm87xx_read_status,
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.config_intr = bcm87xx_config_intr,
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.handle_interrupt = bcm87xx_handle_interrupt,
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.match_phy_device = bcm8706_match_phy_device,
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}, {
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.phy_id = PHY_ID_BCM8727,
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.phy_id_mask = 0xffffffff,
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.name = "Broadcom BCM8727",
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.get_features = bcm87xx_get_features,
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.config_init = bcm87xx_config_init,
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.config_aneg = bcm87xx_config_aneg,
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.read_status = bcm87xx_read_status,
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.config_intr = bcm87xx_config_intr,
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.handle_interrupt = bcm87xx_handle_interrupt,
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.match_phy_device = bcm8727_match_phy_device,
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} };
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module_phy_driver(bcm87xx_driver);
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MODULE_LICENSE("GPL v2");
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