1 // SPDX-License-Identifier: GPL-2.0
7  * igc_check_reset_block - Check if PHY reset is blocked
25  * igc_get_phy_id - Retrieve the PHY ID and revision
33 	struct igc_phy_info *phy = &hw->phy;  in igc_get_phy_id()
37 	ret_val = phy->ops.read_reg(hw, PHY_ID1, &phy_id);  in igc_get_phy_id()
41 	phy->id = (u32)(phy_id << 16);  in igc_get_phy_id()
43 	ret_val = phy->ops.read_reg(hw, PHY_ID2, &phy_id);  in igc_get_phy_id()
47 	phy->id |= (u32)(phy_id & PHY_REVISION_MASK);  in igc_get_phy_id()
48 	phy->revision = (u32)(phy_id & ~PHY_REVISION_MASK);  in igc_get_phy_id()
55  * igc_phy_has_link - Polls PHY for link
74 		ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status);  in igc_phy_has_link()
85 		ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status);  in igc_phy_has_link()
102  * igc_power_up_phy_copper - Restore copper link in case of PHY power down
113 	hw->phy.ops.read_reg(hw, PHY_CONTROL, &mii_reg);  in igc_power_up_phy_copper()
115 	hw->phy.ops.write_reg(hw, PHY_CONTROL, mii_reg);  in igc_power_up_phy_copper()
119  * igc_power_down_phy_copper - Power down copper PHY
130 	hw->phy.ops.read_reg(hw, PHY_CONTROL, &mii_reg);  in igc_power_down_phy_copper()
133 	/* Temporary workaround - should be removed when PHY will implement  in igc_power_down_phy_copper()
136 	/* hw->phy.ops.write_reg(hw, PHY_CONTROL, mii_reg);*/  in igc_power_down_phy_copper()
141  * igc_check_downshift - Checks whether a downshift in speed occurred
148 	struct igc_phy_info *phy = &hw->phy;  in igc_check_downshift()
151 	phy->speed_downgraded = false;  in igc_check_downshift()
155  * igc_phy_hw_reset - PHY hardware reset
165 	struct igc_phy_info *phy = &hw->phy;  in igc_phy_hw_reset()
176 	ret_val = phy->ops.acquire(hw);  in igc_phy_hw_reset()
186 	udelay(phy->reset_delay_us);  in igc_phy_hw_reset()
195 		timeout--;  in igc_phy_hw_reset()
204 	phy->ops.release(hw);  in igc_phy_hw_reset()
211  * igc_phy_setup_autoneg - Configure PHY for auto-negotiation
214  * Reads the MII auto-neg advertisement register and/or the 1000T control
215  * register and if the PHY is already setup for auto-negotiation, then
217  * the appropriate values for the wanted auto-negotiation.
221 	struct igc_phy_info *phy = &hw->phy;  in igc_phy_setup_autoneg()
227 	phy->autoneg_advertised &= phy->autoneg_mask;  in igc_phy_setup_autoneg()
229 	/* Read the MII Auto-Neg Advertisement Register (Address 4). */  in igc_phy_setup_autoneg()
230 	ret_val = phy->ops.read_reg(hw, PHY_AUTONEG_ADV, &mii_autoneg_adv_reg);  in igc_phy_setup_autoneg()
234 	if (phy->autoneg_mask & ADVERTISE_1000_FULL) {  in igc_phy_setup_autoneg()
235 		/* Read the MII 1000Base-T Control Register (Address 9). */  in igc_phy_setup_autoneg()
236 		ret_val = phy->ops.read_reg(hw, PHY_1000T_CTRL,  in igc_phy_setup_autoneg()
242 	if (phy->autoneg_mask & ADVERTISE_2500_FULL) {  in igc_phy_setup_autoneg()
243 		/* Read the MULTI GBT AN Control Register - reg 7.32 */  in igc_phy_setup_autoneg()
244 		ret_val = phy->ops.read_reg(hw, (STANDARD_AN_REG_MASK <<  in igc_phy_setup_autoneg()
260 	/* First we clear all the 10/100 mb speed bits in the Auto-Neg  in igc_phy_setup_autoneg()
262 	 * the  1000Base-T Control Register (Address 9).  in igc_phy_setup_autoneg()
270 	hw_dbg("autoneg_advertised %x\n", phy->autoneg_advertised);  in igc_phy_setup_autoneg()
273 	if (phy->autoneg_advertised & ADVERTISE_10_HALF) {  in igc_phy_setup_autoneg()
279 	if (phy->autoneg_advertised & ADVERTISE_10_FULL) {  in igc_phy_setup_autoneg()
285 	if (phy->autoneg_advertised & ADVERTISE_100_HALF) {  in igc_phy_setup_autoneg()
291 	if (phy->autoneg_advertised & ADVERTISE_100_FULL) {  in igc_phy_setup_autoneg()
297 	if (phy->autoneg_advertised & ADVERTISE_1000_HALF)  in igc_phy_setup_autoneg()
301 	if (phy->autoneg_advertised & ADVERTISE_1000_FULL) {  in igc_phy_setup_autoneg()
307 	if (phy->autoneg_advertised & ADVERTISE_2500_HALF)  in igc_phy_setup_autoneg()
311 	if (phy->autoneg_advertised & ADVERTISE_2500_FULL) {  in igc_phy_setup_autoneg()
320 	 * auto-negotiation is enabled, then software will have to set the  in igc_phy_setup_autoneg()
321 	 * "PAUSE" bits to the correct value in the Auto-Negotiation  in igc_phy_setup_autoneg()
322 	 * Advertisement Register (PHY_AUTONEG_ADV) and re-start auto-  in igc_phy_setup_autoneg()
323 	 * negotiation.  in igc_phy_setup_autoneg()
335 	switch (hw->fc.current_mode) {  in igc_phy_setup_autoneg()
338 		 * software over-ride.  in igc_phy_setup_autoneg()
344 		 * disabled, by a software over-ride.  in igc_phy_setup_autoneg()
356 		 * disabled, by a software over-ride.  in igc_phy_setup_autoneg()
363 		 * over-ride.  in igc_phy_setup_autoneg()
369 		return -IGC_ERR_CONFIG;  in igc_phy_setup_autoneg()
372 	ret_val = phy->ops.write_reg(hw, PHY_AUTONEG_ADV, mii_autoneg_adv_reg);  in igc_phy_setup_autoneg()
376 	hw_dbg("Auto-Neg Advertising %x\n", mii_autoneg_adv_reg);  in igc_phy_setup_autoneg()
378 	if (phy->autoneg_mask & ADVERTISE_1000_FULL)  in igc_phy_setup_autoneg()
379 		ret_val = phy->ops.write_reg(hw, PHY_1000T_CTRL,  in igc_phy_setup_autoneg()
382 	if (phy->autoneg_mask & ADVERTISE_2500_FULL)  in igc_phy_setup_autoneg()
383 		ret_val = phy->ops.write_reg(hw,  in igc_phy_setup_autoneg()
393  * igc_wait_autoneg - Wait for auto-neg completion
396  * Waits for auto-negotiation to complete or for the auto-negotiation time
405 	for (i = PHY_AUTO_NEG_LIMIT; i > 0; i--) {  in igc_wait_autoneg()
406 		ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status);  in igc_wait_autoneg()
409 		ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status);  in igc_wait_autoneg()
417 	/* PHY_AUTO_NEG_TIME expiration doesn't guarantee auto-negotiation  in igc_wait_autoneg()
424  * igc_copper_link_autoneg - Setup/Enable autoneg for copper link
429  * and restart the negotiation process between the link partner.  If
434 	struct igc_phy_info *phy = &hw->phy;  in igc_copper_link_autoneg()
441 	phy->autoneg_advertised &= phy->autoneg_mask;  in igc_copper_link_autoneg()
446 	if (phy->autoneg_advertised == 0)  in igc_copper_link_autoneg()
447 		phy->autoneg_advertised = phy->autoneg_mask;  in igc_copper_link_autoneg()
449 	hw_dbg("Reconfiguring auto-neg advertisement params\n");  in igc_copper_link_autoneg()
452 		hw_dbg("Error Setting up Auto-Negotiation\n");  in igc_copper_link_autoneg()
455 	hw_dbg("Restarting Auto-Neg\n");  in igc_copper_link_autoneg()
457 	/* Restart auto-negotiation by setting the Auto Neg Enable bit and  in igc_copper_link_autoneg()
458 	 * the Auto Neg Restart bit in the PHY control register.  in igc_copper_link_autoneg()
460 	ret_val = phy->ops.read_reg(hw, PHY_CONTROL, &phy_ctrl);  in igc_copper_link_autoneg()
465 	ret_val = phy->ops.write_reg(hw, PHY_CONTROL, phy_ctrl);  in igc_copper_link_autoneg()
469 	/* Does the user want to wait for Auto-Neg to complete here, or  in igc_copper_link_autoneg()
472 	if (phy->autoneg_wait_to_complete) {  in igc_copper_link_autoneg()
480 	hw->mac.get_link_status = true;  in igc_copper_link_autoneg()
487  * igc_setup_copper_link - Configure copper link settings
490  * Calls the appropriate function to configure the link for auto-neg or forced
493  * not established, we return -IGC_ERR_PHY (-2).
500 	if (hw->mac.autoneg) {  in igc_setup_copper_link()
512 		ret_val = hw->phy.ops.force_speed_duplex(hw);  in igc_setup_copper_link()
539  * igc_read_phy_reg_mdic - Read MDI control register
549 	struct igc_phy_info *phy = &hw->phy;  in igc_read_phy_reg_mdic()
555 		ret_val = -IGC_ERR_PARAM;  in igc_read_phy_reg_mdic()
559 	/* Set up Op-code, Phy Address, and register offset in the MDI  in igc_read_phy_reg_mdic()
564 		(phy->addr << IGC_MDIC_PHY_SHIFT) |  in igc_read_phy_reg_mdic()
581 		ret_val = -IGC_ERR_PHY;  in igc_read_phy_reg_mdic()
586 		ret_val = -IGC_ERR_PHY;  in igc_read_phy_reg_mdic()
596  * igc_write_phy_reg_mdic - Write MDI control register
605 	struct igc_phy_info *phy = &hw->phy;  in igc_write_phy_reg_mdic()
611 		ret_val = -IGC_ERR_PARAM;  in igc_write_phy_reg_mdic()
615 	/* Set up Op-code, Phy Address, and register offset in the MDI  in igc_write_phy_reg_mdic()
621 		(phy->addr << IGC_MDIC_PHY_SHIFT) |  in igc_write_phy_reg_mdic()
638 		ret_val = -IGC_ERR_PHY;  in igc_write_phy_reg_mdic()
643 		ret_val = -IGC_ERR_PHY;  in igc_write_phy_reg_mdic()
652  * __igc_access_xmdio_reg - Read/write XMDIO register
664 	ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAC, dev_addr);  in __igc_access_xmdio_reg()
668 	ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAAD, address);  in __igc_access_xmdio_reg()
672 	ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAC, IGC_MMDAC_FUNC_DATA |  in __igc_access_xmdio_reg()
678 		ret_val = hw->phy.ops.read_reg(hw, IGC_MMDAAD, data);  in __igc_access_xmdio_reg()
680 		ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAAD, *data);  in __igc_access_xmdio_reg()
685 	ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAC, 0);  in __igc_access_xmdio_reg()
693  * igc_read_xmdio_reg - Read XMDIO register
706  * igc_write_xmdio_reg - Write XMDIO register
719  * igc_write_phy_reg_gpy - Write GPY PHY register
735 		ret_val = hw->phy.ops.acquire(hw);  in igc_write_phy_reg_gpy()
739 		hw->phy.ops.release(hw);  in igc_write_phy_reg_gpy()
749  * igc_read_phy_reg_gpy - Read GPY PHY register
766 		ret_val = hw->phy.ops.acquire(hw);  in igc_read_phy_reg_gpy()
770 		hw->phy.ops.release(hw);  in igc_read_phy_reg_gpy()
780  * igc_read_phy_fw_version - Read gPHY firmware version
785 	struct igc_phy_info *phy = &hw->phy;  in igc_read_phy_fw_version()
790 	ret_val = phy->ops.read_reg(hw, IGC_GPHY_VERSION, &gphy_version);  in igc_read_phy_fw_version()