1 // SPDX-License-Identifier: GPL-2.0
8  * igc_check_reset_block - Check if PHY reset is blocked
26  * igc_get_phy_id - Retrieve the PHY ID and revision
34 	struct igc_phy_info *phy = &hw->phy;  in igc_get_phy_id()
38 	ret_val = phy->ops.read_reg(hw, PHY_ID1, &phy_id);  in igc_get_phy_id()
42 	phy->id = (u32)(phy_id << 16);  in igc_get_phy_id()
44 	ret_val = phy->ops.read_reg(hw, PHY_ID2, &phy_id);  in igc_get_phy_id()
48 	phy->id |= (u32)(phy_id & PHY_REVISION_MASK);  in igc_get_phy_id()
49 	phy->revision = (u32)(phy_id & ~PHY_REVISION_MASK);  in igc_get_phy_id()
56  * igc_phy_has_link - Polls PHY for link
58  * @iterations: number of times to poll for link
75 		ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status);  in igc_phy_has_link()
86 		ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status);  in igc_phy_has_link()
103  * igc_power_up_phy_copper - Restore copper link in case of PHY power down
114 	hw->phy.ops.read_reg(hw, PHY_CONTROL, &mii_reg);  in igc_power_up_phy_copper()
116 	hw->phy.ops.write_reg(hw, PHY_CONTROL, mii_reg);  in igc_power_up_phy_copper()
120  * igc_power_down_phy_copper - Power down copper PHY
131 	hw->phy.ops.read_reg(hw, PHY_CONTROL, &mii_reg);  in igc_power_down_phy_copper()
133 	hw->phy.ops.write_reg(hw, PHY_CONTROL, mii_reg);  in igc_power_down_phy_copper()
138  * igc_check_downshift - Checks whether a downshift in speed occurred
145 	struct igc_phy_info *phy = &hw->phy;  in igc_check_downshift()
148 	phy->speed_downgraded = false;  in igc_check_downshift()
152  * igc_phy_hw_reset - PHY hardware reset
162 	struct igc_phy_info *phy = &hw->phy;  in igc_phy_hw_reset()
173 	ret_val = phy->ops.acquire(hw);  in igc_phy_hw_reset()
183 	udelay(phy->reset_delay_us);  in igc_phy_hw_reset()
192 		timeout--;  in igc_phy_hw_reset()
201 	phy->ops.release(hw);  in igc_phy_hw_reset()
208  * igc_phy_setup_autoneg - Configure PHY for auto-negotiation
211  * Reads the MII auto-neg advertisement register and/or the 1000T control
212  * register and if the PHY is already setup for auto-negotiation, then
214  * the appropriate values for the wanted auto-negotiation.
218 	struct igc_phy_info *phy = &hw->phy;  in igc_phy_setup_autoneg()
224 	phy->autoneg_advertised &= phy->autoneg_mask;  in igc_phy_setup_autoneg()
226 	/* Read the MII Auto-Neg Advertisement Register (Address 4). */  in igc_phy_setup_autoneg()
227 	ret_val = phy->ops.read_reg(hw, PHY_AUTONEG_ADV, &mii_autoneg_adv_reg);  in igc_phy_setup_autoneg()
231 	if (phy->autoneg_mask & ADVERTISE_1000_FULL) {  in igc_phy_setup_autoneg()
232 		/* Read the MII 1000Base-T Control Register (Address 9). */  in igc_phy_setup_autoneg()
233 		ret_val = phy->ops.read_reg(hw, PHY_1000T_CTRL,  in igc_phy_setup_autoneg()
239 	if (phy->autoneg_mask & ADVERTISE_2500_FULL) {  in igc_phy_setup_autoneg()
240 		/* Read the MULTI GBT AN Control Register - reg 7.32 */  in igc_phy_setup_autoneg()
241 		ret_val = phy->ops.read_reg(hw, (STANDARD_AN_REG_MASK <<  in igc_phy_setup_autoneg()
257 	/* First we clear all the 10/100 mb speed bits in the Auto-Neg  in igc_phy_setup_autoneg()
259 	 * the  1000Base-T Control Register (Address 9).  in igc_phy_setup_autoneg()
267 	hw_dbg("autoneg_advertised %x\n", phy->autoneg_advertised);  in igc_phy_setup_autoneg()
270 	if (phy->autoneg_advertised & ADVERTISE_10_HALF) {  in igc_phy_setup_autoneg()
276 	if (phy->autoneg_advertised & ADVERTISE_10_FULL) {  in igc_phy_setup_autoneg()
282 	if (phy->autoneg_advertised & ADVERTISE_100_HALF) {  in igc_phy_setup_autoneg()
288 	if (phy->autoneg_advertised & ADVERTISE_100_FULL) {  in igc_phy_setup_autoneg()
294 	if (phy->autoneg_advertised & ADVERTISE_1000_HALF)  in igc_phy_setup_autoneg()
298 	if (phy->autoneg_advertised & ADVERTISE_1000_FULL) {  in igc_phy_setup_autoneg()
304 	if (phy->autoneg_advertised & ADVERTISE_2500_HALF)  in igc_phy_setup_autoneg()
308 	if (phy->autoneg_advertised & ADVERTISE_2500_FULL) {  in igc_phy_setup_autoneg()
317 	 * auto-negotiation is enabled, then software will have to set the  in igc_phy_setup_autoneg()
318 	 * "PAUSE" bits to the correct value in the Auto-Negotiation  in igc_phy_setup_autoneg()
319 	 * Advertisement Register (PHY_AUTONEG_ADV) and re-start auto-  in igc_phy_setup_autoneg()
332 	switch (hw->fc.current_mode) {  in igc_phy_setup_autoneg()
335 		 * software over-ride.  in igc_phy_setup_autoneg()
341 		 * disabled, by a software over-ride.  in igc_phy_setup_autoneg()
353 		 * disabled, by a software over-ride.  in igc_phy_setup_autoneg()
360 		 * over-ride.  in igc_phy_setup_autoneg()
366 		return -IGC_ERR_CONFIG;  in igc_phy_setup_autoneg()
369 	ret_val = phy->ops.write_reg(hw, PHY_AUTONEG_ADV, mii_autoneg_adv_reg);  in igc_phy_setup_autoneg()
373 	hw_dbg("Auto-Neg Advertising %x\n", mii_autoneg_adv_reg);  in igc_phy_setup_autoneg()
375 	if (phy->autoneg_mask & ADVERTISE_1000_FULL)  in igc_phy_setup_autoneg()
376 		ret_val = phy->ops.write_reg(hw, PHY_1000T_CTRL,  in igc_phy_setup_autoneg()
379 	if (phy->autoneg_mask & ADVERTISE_2500_FULL)  in igc_phy_setup_autoneg()
380 		ret_val = phy->ops.write_reg(hw,  in igc_phy_setup_autoneg()
390  * igc_wait_autoneg - Wait for auto-neg completion
393  * Waits for auto-negotiation to complete or for the auto-negotiation time
402 	for (i = PHY_AUTO_NEG_LIMIT; i > 0; i--) {  in igc_wait_autoneg()
403 		ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status);  in igc_wait_autoneg()
406 		ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status);  in igc_wait_autoneg()
414 	/* PHY_AUTO_NEG_TIME expiration doesn't guarantee auto-negotiation  in igc_wait_autoneg()
421  * igc_copper_link_autoneg - Setup/Enable autoneg for copper link
431 	struct igc_phy_info *phy = &hw->phy;  in igc_copper_link_autoneg()
438 	phy->autoneg_advertised &= phy->autoneg_mask;  in igc_copper_link_autoneg()
443 	if (phy->autoneg_advertised == 0)  in igc_copper_link_autoneg()
444 		phy->autoneg_advertised = phy->autoneg_mask;  in igc_copper_link_autoneg()
446 	hw_dbg("Reconfiguring auto-neg advertisement params\n");  in igc_copper_link_autoneg()
449 		hw_dbg("Error Setting up Auto-Negotiation\n");  in igc_copper_link_autoneg()
452 	hw_dbg("Restarting Auto-Neg\n");  in igc_copper_link_autoneg()
454 	/* Restart auto-negotiation by setting the Auto Neg Enable bit and  in igc_copper_link_autoneg()
455 	 * the Auto Neg Restart bit in the PHY control register.  in igc_copper_link_autoneg()
457 	ret_val = phy->ops.read_reg(hw, PHY_CONTROL, &phy_ctrl);  in igc_copper_link_autoneg()
462 	ret_val = phy->ops.write_reg(hw, PHY_CONTROL, phy_ctrl);  in igc_copper_link_autoneg()
466 	/* Does the user want to wait for Auto-Neg to complete here, or  in igc_copper_link_autoneg()
469 	if (phy->autoneg_wait_to_complete) {  in igc_copper_link_autoneg()
477 	hw->mac.get_link_status = true;  in igc_copper_link_autoneg()
484  * igc_setup_copper_link - Configure copper link settings
487  * Calls the appropriate function to configure the link for auto-neg or forced
490  * not established, we return -IGC_ERR_PHY (-2).
524  * igc_read_phy_reg_mdic - Read MDI control register
534 	struct igc_phy_info *phy = &hw->phy;  in igc_read_phy_reg_mdic()
540 		ret_val = -IGC_ERR_PARAM;  in igc_read_phy_reg_mdic()
544 	/* Set up Op-code, Phy Address, and register offset in the MDI  in igc_read_phy_reg_mdic()
549 		(phy->addr << IGC_MDIC_PHY_SHIFT) |  in igc_read_phy_reg_mdic()
554 	/* Poll the ready bit to see if the MDI read completed  in igc_read_phy_reg_mdic()
566 		ret_val = -IGC_ERR_PHY;  in igc_read_phy_reg_mdic()
571 		ret_val = -IGC_ERR_PHY;  in igc_read_phy_reg_mdic()
581  * igc_write_phy_reg_mdic - Write MDI control register
590 	struct igc_phy_info *phy = &hw->phy;  in igc_write_phy_reg_mdic()
596 		ret_val = -IGC_ERR_PARAM;  in igc_write_phy_reg_mdic()
600 	/* Set up Op-code, Phy Address, and register offset in the MDI  in igc_write_phy_reg_mdic()
606 		(phy->addr << IGC_MDIC_PHY_SHIFT) |  in igc_write_phy_reg_mdic()
611 	/* Poll the ready bit to see if the MDI read completed  in igc_write_phy_reg_mdic()
623 		ret_val = -IGC_ERR_PHY;  in igc_write_phy_reg_mdic()
628 		ret_val = -IGC_ERR_PHY;  in igc_write_phy_reg_mdic()
637  * __igc_access_xmdio_reg - Read/write XMDIO register
649 	ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAC, dev_addr);  in __igc_access_xmdio_reg()
653 	ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAAD, address);  in __igc_access_xmdio_reg()
657 	ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAC, IGC_MMDAC_FUNC_DATA |  in __igc_access_xmdio_reg()
663 		ret_val = hw->phy.ops.read_reg(hw, IGC_MMDAAD, data);  in __igc_access_xmdio_reg()
665 		ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAAD, *data);  in __igc_access_xmdio_reg()
670 	ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAC, 0);  in __igc_access_xmdio_reg()
678  * igc_read_xmdio_reg - Read XMDIO register
691  * igc_write_xmdio_reg - Write XMDIO register
704  * igc_write_phy_reg_gpy - Write GPY PHY register
720 		ret_val = hw->phy.ops.acquire(hw);  in igc_write_phy_reg_gpy()
724 		hw->phy.ops.release(hw);  in igc_write_phy_reg_gpy()
734  * igc_read_phy_reg_gpy - Read GPY PHY register
751 		ret_val = hw->phy.ops.acquire(hw);  in igc_read_phy_reg_gpy()
755 		hw->phy.ops.release(hw);  in igc_read_phy_reg_gpy()
765  * igc_read_phy_fw_version - Read gPHY firmware version
770 	struct igc_phy_info *phy = &hw->phy;  in igc_read_phy_fw_version()
775 	ret_val = phy->ops.read_reg(hw, IGC_GPHY_VERSION, &gphy_version);  in igc_read_phy_fw_version()