>Subject: [PATCH 2/2] net-next: stmmac: add mdio clause 45 access from mac >device for dwmac4 > >add clause 45 mdio read and write from mac device for dwmac4. > >Signed-off-by: Biao Huang <biao.hu...@mediatek.com>
Hi, I would like to point out that there is another C45 implementation proposed here "net: stmmac: enable clause 45 mdio support" at https://marc.info/?l=linux-netdev&m=155609745200339&w=2 What is the preference of the driver maintainer here? Thanks Boon Leong >--- > drivers/net/ethernet/stmicro/stmmac/common.h | 11 +- > drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c | 3 + > drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c | 167 >+++++++++++++++++++-- > 3 files changed, 165 insertions(+), 16 deletions(-) > >diff --git a/drivers/net/ethernet/stmicro/stmmac/common.h >b/drivers/net/ethernet/stmicro/stmmac/common.h >index 709dcec..06573b3 100644 >--- a/drivers/net/ethernet/stmicro/stmmac/common.h >+++ b/drivers/net/ethernet/stmicro/stmmac/common.h >@@ -410,12 +410,15 @@ struct mac_link { > struct mii_regs { > unsigned int addr; /* MII Address */ > unsigned int data; /* MII Data */ >- unsigned int addr_shift; /* MII address shift */ >- unsigned int reg_shift; /* MII reg shift */ >- unsigned int addr_mask; /* MII address mask */ >- unsigned int reg_mask; /* MII reg mask */ >+ unsigned int addr_shift; /* PHY address shift */ >+ unsigned int cl45_reg_shift; /* CL45 reg address shift */ >+ unsigned int reg_shift; /* CL22 reg/CL45 dev shift */ >+ unsigned int addr_mask; /* PHY address mask */ >+ unsigned int cl45_reg_mask; /* CL45 reg mask */ >+ unsigned int reg_mask; /* CL22 reg/CL45 dev mask */ > unsigned int clk_csr_shift; > unsigned int clk_csr_mask; >+ unsigned int cl45_en; /* CL45 Enable*/ > }; > > struct mac_device_info { >diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c >b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c >index 2a41c64..1ca03f9 100644 >--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c >+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c >@@ -835,6 +835,9 @@ int dwmac4_setup(struct stmmac_priv *priv) > mac->mii.reg_mask = GENMASK(20, 16); > mac->mii.clk_csr_shift = 8; > mac->mii.clk_csr_mask = GENMASK(11, 8); >+ mac->mii.cl45_reg_shift = 16; >+ mac->mii.cl45_reg_mask = GENMASK(31, 16); >+ mac->mii.cl45_en = BIT(1); > > return 0; > } >diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c >b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c >index bdd3515..a70c967 100644 >--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c >+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c >@@ -150,16 +150,16 @@ static int stmmac_xgmac2_mdio_write(struct >mii_bus *bus, int phyaddr, > } > > /** >- * stmmac_mdio_read >+ * stmmac_c22_read > * @bus: points to the mii_bus structure >- * @phyaddr: MII addr >- * @phyreg: MII reg >- * Description: it reads data from the MII register from within the phy >device. >+ * @phyaddr: clause 22 phy address >+ * @phyreg: clause 22 phy register >+ * Description: it reads data from the MII register follow clause 22. > * For the 7111 GMAC, we must set the bit 0 in the MII address register while > * accessing the PHY registers. > * Fortunately, it seems this has no drawback for the 7109 MAC. > */ >-static int stmmac_mdio_read(struct mii_bus *bus, int phyaddr, int phyreg) >+static int stmmac_c22_read(struct mii_bus *bus, int phyaddr, int phyreg) > { > struct net_device *ndev = bus->priv; > struct stmmac_priv *priv = netdev_priv(ndev); >@@ -194,15 +194,15 @@ static int stmmac_mdio_read(struct mii_bus *bus, >int phyaddr, int phyreg) > } > > /** >- * stmmac_mdio_write >+ * stmmac_c22_write > * @bus: points to the mii_bus structure >- * @phyaddr: MII addr >- * @phyreg: MII reg >- * @phydata: phy data >- * Description: it writes the data into the MII register from within the >device. >+ * @phyaddr: clause-22 phy address >+ * @phyreg: clause-22 phy register >+ * @phydata: clause-22 phy data >+ * Description: it writes the data into the MII register follow clause 22. > */ >-static int stmmac_mdio_write(struct mii_bus *bus, int phyaddr, int phyreg, >- u16 phydata) >+static int stmmac_c22_write(struct mii_bus *bus, int phyaddr, int phyreg, >+ u16 phydata) > { > struct net_device *ndev = bus->priv; > struct stmmac_priv *priv = netdev_priv(ndev); >@@ -237,6 +237,149 @@ static int stmmac_mdio_write(struct mii_bus *bus, >int phyaddr, int phyreg, > } > > /** >+ * stmmac_c45_read >+ * @bus: points to the mii_bus structure >+ * @phyaddr: clause-45 phy address >+ * @devad: clause-45 device address >+ * @prtad: clause-45 register address >+ * @phydata: phy data >+ * Description: it reads the data from the MII register follow clause 45. >+ */ >+static int stmmac_c45_read(struct mii_bus *bus, int phyaddr, >+ int devad, int prtad) >+{ >+ struct net_device *ndev = bus->priv; >+ struct stmmac_priv *priv = netdev_priv(ndev); >+ unsigned int mii_address = priv->hw->mii.addr; >+ unsigned int mii_data = priv->hw->mii.data; >+ u32 v, value; >+ int data; >+ >+ if (readl_poll_timeout(priv->ioaddr + mii_address, v, !(v & MII_BUSY), >+ 100, 10000)) >+ return -EIO; >+ >+ value = 0; >+ value |= (prtad << priv->hw->mii.cl45_reg_shift) >+ & priv->hw->mii.cl45_reg_mask; >+ writel(value, priv->ioaddr + mii_data); >+ >+ /* delay 2ms to avoid error value of get_phy_c45_devs_in_pkg */ >+ mdelay(2); >+ >+ value = MII_BUSY; >+ value |= (phyaddr << priv->hw->mii.addr_shift) >+ & priv->hw->mii.addr_mask; >+ value |= (devad << priv->hw->mii.reg_shift) & priv->hw->mii.reg_mask; >+ value |= (priv->clk_csr << priv->hw->mii.clk_csr_shift) >+ & priv->hw->mii.clk_csr_mask; >+ if (priv->plat->has_gmac4) { >+ value |= MII_GMAC4_READ; >+ value |= priv->hw->mii.cl45_en; >+ } >+ writel(value, priv->ioaddr + mii_address); >+ >+ if (readl_poll_timeout(priv->ioaddr + mii_address, v, !(v & MII_BUSY), >+ 100, 10000)) >+ return -EIO; >+ >+ /* Read the data from the MII data register */ >+ data = (int)(readl(priv->ioaddr + mii_data) & 0xffff); >+ >+ return data; >+} >+ >+/** >+ * stmmac_c45_write >+ * @bus: points to the mii_bus structure >+ * @phyaddr: clause-45 phy address >+ * @devad: clause-45 device address >+ * @prtad: clause-45 register address >+ * @phydata: phy data >+ * Description: it writes the data into the MII register follow clause 45. >+ */ >+static int stmmac_c45_write(struct mii_bus *bus, int phyaddr, int devad, >+ int prtad, u16 phydata) >+{ >+ struct net_device *ndev = bus->priv; >+ struct stmmac_priv *priv = netdev_priv(ndev); >+ unsigned int mii_address = priv->hw->mii.addr; >+ unsigned int mii_data = priv->hw->mii.data; >+ u32 v, value; >+ >+ /* Wait until any existing MII operation is complete */ >+ if (readl_poll_timeout(priv->ioaddr + mii_address, v, !(v & MII_BUSY), >+ 100, 10000)) >+ return -EIO; >+ >+ value = phydata; >+ value |= (prtad << priv->hw->mii.cl45_reg_shift) & >+ priv->hw->mii.cl45_reg_mask; >+ writel(value, priv->ioaddr + mii_data); >+ >+ mdelay(2); >+ >+ value = MII_BUSY; >+ value |= (phyaddr << priv->hw->mii.addr_shift) & >+ priv->hw->mii.addr_mask; >+ value |= (devad << priv->hw->mii.reg_shift) & priv->hw->mii.reg_mask; >+ value |= (priv->clk_csr << priv->hw->mii.clk_csr_shift) & >+ priv->hw->mii.clk_csr_mask; >+ >+ if (priv->plat->has_gmac4) { >+ value |= MII_GMAC4_WRITE; >+ value |= priv->hw->mii.cl45_en; >+ } >+ writel(value, priv->ioaddr + mii_address); >+ >+ /* Wait until any existing MII operation is complete */ >+ return readl_poll_timeout(priv->ioaddr + mii_address, v, !(v & >MII_BUSY), >+ 100, 10000); >+} >+ >+/** >+ * stmmac_mdio_read >+ * @bus: points to the mii_bus structure >+ * @phyaddr: MII addr >+ * @phyreg: MII reg >+ * Description: it reads data from the MII register from within the phy >device. >+ */ >+static int stmmac_mdio_read(struct mii_bus *bus, int phyaddr, int phyreg) >+{ >+ if (phyreg & MII_ADDR_C45) { >+ int devad, prtad; >+ >+ devad = (phyreg >> 16) & 0x1f; >+ prtad = phyreg & 0xffff; >+ return stmmac_c45_read(bus, phyaddr, devad, prtad); >+ } else { >+ return stmmac_c22_read(bus, phyaddr, phyreg); >+ } >+} >+ >+/** >+ * stmmac_mdio_write >+ * @bus: points to the mii_bus structure >+ * @phyaddr: MII addr >+ * @phyreg: MII reg >+ * @phydata: phy data >+ * Description: it writes the data into the MII register from within the >device. >+ */ >+static int stmmac_mdio_write(struct mii_bus *bus, int phyaddr, int phyreg, >+ u16 phydata) >+{ >+ if (phyreg & MII_ADDR_C45) { >+ int devad, prtad; >+ >+ devad = (phyreg >> 16) & 0x1f; >+ prtad = phyreg & 0xffff; >+ return stmmac_c45_write(bus, phyaddr, devad, prtad, >phydata); >+ } else { >+ return stmmac_c22_write(bus, phyaddr, phyreg, phydata); >+ } >+} >+ >+/** > * stmmac_mdio_reset > * @bus: points to the mii_bus structure > * Description: reset the MII bus >-- >1.7.9.5
