Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Claudiu Manoil | 585 | 82.39% | 3 | 37.50% |
Michael Walle | 100 | 14.08% | 3 | 37.50% |
Vladimir Oltean | 14 | 1.97% | 1 | 12.50% |
Alex Marginean | 11 | 1.55% | 1 | 12.50% |
Total | 710 | 8 |
// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) /* Copyright 2019 NXP */ #include <linux/fsl/enetc_mdio.h> #include <linux/mdio.h> #include <linux/of_mdio.h> #include <linux/iopoll.h> #include <linux/of.h> #include "enetc_pf.h" #define ENETC_MDIO_CFG 0x0 /* MDIO configuration and status */ #define ENETC_MDIO_CTL 0x4 /* MDIO control */ #define ENETC_MDIO_DATA 0x8 /* MDIO data */ #define ENETC_MDIO_ADDR 0xc /* MDIO address */ #define MDIO_CFG_CLKDIV(x) ((((x) >> 1) & 0xff) << 8) #define MDIO_CFG_BSY BIT(0) #define MDIO_CFG_RD_ER BIT(1) #define MDIO_CFG_HOLD(x) (((x) << 2) & GENMASK(4, 2)) #define MDIO_CFG_ENC45 BIT(6) /* external MDIO only - driven on neg MDC edge */ #define MDIO_CFG_NEG BIT(23) #define ENETC_EMDIO_CFG \ (MDIO_CFG_HOLD(2) | \ MDIO_CFG_CLKDIV(258) | \ MDIO_CFG_NEG) #define MDIO_CTL_DEV_ADDR(x) ((x) & 0x1f) #define MDIO_CTL_PORT_ADDR(x) (((x) & 0x1f) << 5) #define MDIO_CTL_READ BIT(15) static inline u32 enetc_mdio_rd(struct enetc_mdio_priv *mdio_priv, int off) { return enetc_port_rd_mdio(mdio_priv->hw, mdio_priv->mdio_base + off); } static inline void enetc_mdio_wr(struct enetc_mdio_priv *mdio_priv, int off, u32 val) { enetc_port_wr_mdio(mdio_priv->hw, mdio_priv->mdio_base + off, val); } static bool enetc_mdio_is_busy(struct enetc_mdio_priv *mdio_priv) { return enetc_mdio_rd(mdio_priv, ENETC_MDIO_CFG) & MDIO_CFG_BSY; } static int enetc_mdio_wait_complete(struct enetc_mdio_priv *mdio_priv) { bool is_busy; return readx_poll_timeout(enetc_mdio_is_busy, mdio_priv, is_busy, !is_busy, 10, 10 * 1000); } int enetc_mdio_write(struct mii_bus *bus, int phy_id, int regnum, u16 value) { struct enetc_mdio_priv *mdio_priv = bus->priv; u32 mdio_ctl, mdio_cfg; u16 dev_addr; int ret; mdio_cfg = ENETC_EMDIO_CFG; if (regnum & MII_ADDR_C45) { dev_addr = (regnum >> 16) & 0x1f; mdio_cfg |= MDIO_CFG_ENC45; } else { /* clause 22 (ie 1G) */ dev_addr = regnum & 0x1f; mdio_cfg &= ~MDIO_CFG_ENC45; } enetc_mdio_wr(mdio_priv, ENETC_MDIO_CFG, mdio_cfg); ret = enetc_mdio_wait_complete(mdio_priv); if (ret) return ret; /* set port and dev addr */ mdio_ctl = MDIO_CTL_PORT_ADDR(phy_id) | MDIO_CTL_DEV_ADDR(dev_addr); enetc_mdio_wr(mdio_priv, ENETC_MDIO_CTL, mdio_ctl); /* set the register address */ if (regnum & MII_ADDR_C45) { enetc_mdio_wr(mdio_priv, ENETC_MDIO_ADDR, regnum & 0xffff); ret = enetc_mdio_wait_complete(mdio_priv); if (ret) return ret; } /* write the value */ enetc_mdio_wr(mdio_priv, ENETC_MDIO_DATA, value); ret = enetc_mdio_wait_complete(mdio_priv); if (ret) return ret; return 0; } EXPORT_SYMBOL_GPL(enetc_mdio_write); int enetc_mdio_read(struct mii_bus *bus, int phy_id, int regnum) { struct enetc_mdio_priv *mdio_priv = bus->priv; u32 mdio_ctl, mdio_cfg; u16 dev_addr, value; int ret; mdio_cfg = ENETC_EMDIO_CFG; if (regnum & MII_ADDR_C45) { dev_addr = (regnum >> 16) & 0x1f; mdio_cfg |= MDIO_CFG_ENC45; } else { dev_addr = regnum & 0x1f; mdio_cfg &= ~MDIO_CFG_ENC45; } enetc_mdio_wr(mdio_priv, ENETC_MDIO_CFG, mdio_cfg); ret = enetc_mdio_wait_complete(mdio_priv); if (ret) return ret; /* set port and device addr */ mdio_ctl = MDIO_CTL_PORT_ADDR(phy_id) | MDIO_CTL_DEV_ADDR(dev_addr); enetc_mdio_wr(mdio_priv, ENETC_MDIO_CTL, mdio_ctl); /* set the register address */ if (regnum & MII_ADDR_C45) { enetc_mdio_wr(mdio_priv, ENETC_MDIO_ADDR, regnum & 0xffff); ret = enetc_mdio_wait_complete(mdio_priv); if (ret) return ret; } /* initiate the read */ enetc_mdio_wr(mdio_priv, ENETC_MDIO_CTL, mdio_ctl | MDIO_CTL_READ); ret = enetc_mdio_wait_complete(mdio_priv); if (ret) return ret; /* return all Fs if nothing was there */ if (enetc_mdio_rd(mdio_priv, ENETC_MDIO_CFG) & MDIO_CFG_RD_ER) { dev_dbg(&bus->dev, "Error while reading PHY%d reg at %d.%hhu\n", phy_id, dev_addr, regnum); return 0xffff; } value = enetc_mdio_rd(mdio_priv, ENETC_MDIO_DATA) & 0xffff; return value; } EXPORT_SYMBOL_GPL(enetc_mdio_read); struct enetc_hw *enetc_hw_alloc(struct device *dev, void __iomem *port_regs) { struct enetc_hw *hw; hw = devm_kzalloc(dev, sizeof(*hw), GFP_KERNEL); if (!hw) return ERR_PTR(-ENOMEM); hw->port = port_regs; return hw; } EXPORT_SYMBOL_GPL(enetc_hw_alloc); /* Lock for MDIO access errata on LS1028A */ DEFINE_RWLOCK(enetc_mdio_lock); EXPORT_SYMBOL_GPL(enetc_mdio_lock);
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