stmicro/stmmac/stmmac_mdio.c

4   Provides Bus interface for MII registers
16 #include <linux/mii.h>
85 	unsigned int mii_address = priv->hw->mii.addr;  in stmmac_xgmac2_mdio_read()
86 	unsigned int mii_data = priv->hw->mii.data;  in stmmac_xgmac2_mdio_read()
90 	/* Wait until any existing MII operation is complete */  in stmmac_xgmac2_mdio_read()
109 	value |= (priv->clk_csr << priv->hw->mii.clk_csr_shift)  in stmmac_xgmac2_mdio_read()
110 		& priv->hw->mii.clk_csr_mask;  in stmmac_xgmac2_mdio_read()
113 	/* Wait until any existing MII operation is complete */  in stmmac_xgmac2_mdio_read()
118 	/* Set the MII address register to read */  in stmmac_xgmac2_mdio_read()
122 	/* Wait until any existing MII operation is complete */  in stmmac_xgmac2_mdio_read()
127 	/* Read the data from the MII data register */  in stmmac_xgmac2_mdio_read()
136 	unsigned int mii_address = priv->hw->mii.addr;  in stmmac_xgmac2_mdio_write()
137 	unsigned int mii_data = priv->hw->mii.data;  in stmmac_xgmac2_mdio_write()
141 	/* Wait until any existing MII operation is complete */  in stmmac_xgmac2_mdio_write()
160 	value |= (priv->clk_csr << priv->hw->mii.clk_csr_shift)  in stmmac_xgmac2_mdio_write()
161 		& priv->hw->mii.clk_csr_mask;  in stmmac_xgmac2_mdio_write()
165 	/* Wait until any existing MII operation is complete */  in stmmac_xgmac2_mdio_write()
170 	/* Set the MII address register to write */  in stmmac_xgmac2_mdio_write()
174 	/* Wait until any existing MII operation is complete */  in stmmac_xgmac2_mdio_write()
182  * @phyaddr: MII addr
183  * @phyreg: MII reg
184  * Description: it reads data from the MII register from within the phy device.
185  * For the 7111 GMAC, we must set the bit 0 in the MII address register while
193 	unsigned int mii_address = priv->hw->mii.addr;  in stmmac_mdio_read()
194 	unsigned int mii_data = priv->hw->mii.data;  in stmmac_mdio_read()
199 	value |= (phyaddr << priv->hw->mii.addr_shift)  in stmmac_mdio_read()
200 		& priv->hw->mii.addr_mask;  in stmmac_mdio_read()
201 	value |= (phyreg << priv->hw->mii.reg_shift) & priv->hw->mii.reg_mask;  in stmmac_mdio_read()
202 	value |= (priv->clk_csr << priv->hw->mii.clk_csr_shift)  in stmmac_mdio_read()
203 		& priv->hw->mii.clk_csr_mask;  in stmmac_mdio_read()
208 			value &= ~priv->hw->mii.reg_mask;  in stmmac_mdio_read()
210 			       priv->hw->mii.reg_shift) &  in stmmac_mdio_read()
211 			       priv->hw->mii.reg_mask;  in stmmac_mdio_read()
229 	/* Read the data from the MII data register */  in stmmac_mdio_read()
238  * @phyaddr: MII addr
239  * @phyreg: MII reg
241  * Description: it writes the data into the MII register from within the device.
248 	unsigned int mii_address = priv->hw->mii.addr;  in stmmac_mdio_write()
249 	unsigned int mii_data = priv->hw->mii.data;  in stmmac_mdio_write()
254 	value |= (phyaddr << priv->hw->mii.addr_shift)  in stmmac_mdio_write()
255 		& priv->hw->mii.addr_mask;  in stmmac_mdio_write()
256 	value |= (phyreg << priv->hw->mii.reg_shift) & priv->hw->mii.reg_mask;  in stmmac_mdio_write()
258 	value |= (priv->clk_csr << priv->hw->mii.clk_csr_shift)  in stmmac_mdio_write()
259 		& priv->hw->mii.clk_csr_mask;  in stmmac_mdio_write()
264 			value &= ~priv->hw->mii.reg_mask;  in stmmac_mdio_write()
266 			       priv->hw->mii.reg_shift) &  in stmmac_mdio_write()
267 			       priv->hw->mii.reg_mask;  in stmmac_mdio_write()
276 	/* Wait until any existing MII operation is complete */  in stmmac_mdio_write()
281 	/* Set the MII address register to write */  in stmmac_mdio_write()
285 	/* Wait until any existing MII operation is complete */  in stmmac_mdio_write()
293  * Description: reset the MII bus
300 	unsigned int mii_address = priv->hw->mii.addr;  in stmmac_mdio_reset()
344  * Description: it registers the MII bus
471 	priv->mii = new_bus;  in stmmac_mdio_register()
483  * Description: it unregisters the MII bus
489 	if (!priv->mii)  in stmmac_mdio_unregister()
492 	mdiobus_unregister(priv->mii);  in stmmac_mdio_unregister()
493 	priv->mii->priv = NULL;  in stmmac_mdio_unregister()
494 	mdiobus_free(priv->mii);  in stmmac_mdio_unregister()
495 	priv->mii = NULL;  in stmmac_mdio_unregister()