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
150 	struct igc_phy_info *phy = &hw->phy;  in igc_check_downshift()
153 	switch (phy->type) {  in igc_check_downshift()
157 		phy->speed_downgraded = false;  in igc_check_downshift()
165  * igc_phy_hw_reset - PHY hardware reset
175 	struct igc_phy_info *phy = &hw->phy;  in igc_phy_hw_reset()
185 	ret_val = phy->ops.acquire(hw);  in igc_phy_hw_reset()
193 	udelay(phy->reset_delay_us);  in igc_phy_hw_reset()
200 	phy->ops.release(hw);  in igc_phy_hw_reset()
207  * igc_phy_setup_autoneg - Configure PHY for auto-negotiation
210  * Reads the MII auto-neg advertisement register and/or the 1000T control
211  * register and if the PHY is already setup for auto-negotiation, then
213  * the appropriate values for the wanted auto-negotiation.
217 	struct igc_phy_info *phy = &hw->phy;  in igc_phy_setup_autoneg()
223 	phy->autoneg_advertised &= phy->autoneg_mask;  in igc_phy_setup_autoneg()
225 	/* Read the MII Auto-Neg Advertisement Register (Address 4). */  in igc_phy_setup_autoneg()
226 	ret_val = phy->ops.read_reg(hw, PHY_AUTONEG_ADV, &mii_autoneg_adv_reg);  in igc_phy_setup_autoneg()
230 	if (phy->autoneg_mask & ADVERTISE_1000_FULL) {  in igc_phy_setup_autoneg()
231 		/* Read the MII 1000Base-T Control Register (Address 9). */  in igc_phy_setup_autoneg()
232 		ret_val = phy->ops.read_reg(hw, PHY_1000T_CTRL,  in igc_phy_setup_autoneg()
238 	if ((phy->autoneg_mask & ADVERTISE_2500_FULL) &&  in igc_phy_setup_autoneg()
239 	    hw->phy.id == I225_I_PHY_ID) {  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()
269 	/* Do we want to advertise 10 Mb Half Duplex? */  in igc_phy_setup_autoneg()
270 	if (phy->autoneg_advertised & ADVERTISE_10_HALF) {  in igc_phy_setup_autoneg()
271 		hw_dbg("Advertise 10mb Half duplex\n");  in igc_phy_setup_autoneg()
275 	/* Do we want to advertise 10 Mb Full Duplex? */  in igc_phy_setup_autoneg()
276 	if (phy->autoneg_advertised & ADVERTISE_10_FULL) {  in igc_phy_setup_autoneg()
277 		hw_dbg("Advertise 10mb Full duplex\n");  in igc_phy_setup_autoneg()
281 	/* Do we want to advertise 100 Mb Half Duplex? */  in igc_phy_setup_autoneg()
282 	if (phy->autoneg_advertised & ADVERTISE_100_HALF) {  in igc_phy_setup_autoneg()
283 		hw_dbg("Advertise 100mb Half duplex\n");  in igc_phy_setup_autoneg()
287 	/* Do we want to advertise 100 Mb Full Duplex? */  in igc_phy_setup_autoneg()
288 	if (phy->autoneg_advertised & ADVERTISE_100_FULL) {  in igc_phy_setup_autoneg()
289 		hw_dbg("Advertise 100mb Full duplex\n");  in igc_phy_setup_autoneg()
293 	/* We do not allow the Phy to advertise 1000 Mb Half Duplex */  in igc_phy_setup_autoneg()
294 	if (phy->autoneg_advertised & ADVERTISE_1000_HALF)  in igc_phy_setup_autoneg()
295 		hw_dbg("Advertise 1000mb Half duplex request denied!\n");  in igc_phy_setup_autoneg()
297 	/* Do we want to advertise 1000 Mb Full Duplex? */  in igc_phy_setup_autoneg()
298 	if (phy->autoneg_advertised & ADVERTISE_1000_FULL) {  in igc_phy_setup_autoneg()
299 		hw_dbg("Advertise 1000mb Full duplex\n");  in igc_phy_setup_autoneg()
303 	/* We do not allow the Phy to advertise 2500 Mb Half Duplex */  in igc_phy_setup_autoneg()
304 	if (phy->autoneg_advertised & ADVERTISE_2500_HALF)  in igc_phy_setup_autoneg()
305 		hw_dbg("Advertise 2500mb Half duplex request denied!\n");  in igc_phy_setup_autoneg()
307 	/* Do we want to advertise 2500 Mb Full Duplex? */  in igc_phy_setup_autoneg()
308 	if (phy->autoneg_advertised & ADVERTISE_2500_FULL) {  in igc_phy_setup_autoneg()
309 		hw_dbg("Advertise 2500mb Full duplex\n");  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 	    hw->phy.id == I225_I_PHY_ID)  in igc_phy_setup_autoneg()
381 		ret_val = phy->ops.write_reg(hw,  in igc_phy_setup_autoneg()
391  * igc_wait_autoneg - Wait for auto-neg completion
394  * Waits for auto-negotiation to complete or for the auto-negotiation time
403 	for (i = PHY_AUTO_NEG_LIMIT; i > 0; i--) {  in igc_wait_autoneg()
404 		ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status);  in igc_wait_autoneg()
407 		ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status);  in igc_wait_autoneg()
415 	/* PHY_AUTO_NEG_TIME expiration doesn't guarantee auto-negotiation  in igc_wait_autoneg()
422  * igc_copper_link_autoneg - Setup/Enable autoneg for copper link
426  * configure to advertise the full capability.  Setup the PHY to autoneg
432 	struct igc_phy_info *phy = &hw->phy;  in igc_copper_link_autoneg()
439 	phy->autoneg_advertised &= phy->autoneg_mask;  in igc_copper_link_autoneg()
442 	 * by the calling code so we set to advertise full capability.  in igc_copper_link_autoneg()
444 	if (phy->autoneg_advertised == 0)  in igc_copper_link_autoneg()
445 		phy->autoneg_advertised = phy->autoneg_mask;  in igc_copper_link_autoneg()
447 	hw_dbg("Reconfiguring auto-neg advertisement params\n");  in igc_copper_link_autoneg()
450 		hw_dbg("Error Setting up Auto-Negotiation\n");  in igc_copper_link_autoneg()
453 	hw_dbg("Restarting Auto-Neg\n");  in igc_copper_link_autoneg()
455 	/* Restart auto-negotiation by setting the Auto Neg Enable bit and  in igc_copper_link_autoneg()
458 	ret_val = phy->ops.read_reg(hw, PHY_CONTROL, &phy_ctrl);  in igc_copper_link_autoneg()
463 	ret_val = phy->ops.write_reg(hw, PHY_CONTROL, phy_ctrl);  in igc_copper_link_autoneg()
467 	/* Does the user want to wait for Auto-Neg to complete here, or  in igc_copper_link_autoneg()
470 	if (phy->autoneg_wait_to_complete) {  in igc_copper_link_autoneg()
478 	hw->mac.get_link_status = true;  in igc_copper_link_autoneg()
485  * igc_setup_copper_link - Configure copper link settings
488  * Calls the appropriate function to configure the link for auto-neg or forced
489  * speed and duplex.  Then we check for link, once link is established calls
491  * not established, we return -IGC_ERR_PHY (-2).
498 	if (hw->mac.autoneg) {  in igc_setup_copper_link()
509 		hw_dbg("Forcing Speed and Duplex\n");  in igc_setup_copper_link()
510 		ret_val = hw->phy.ops.force_speed_duplex(hw);  in igc_setup_copper_link()
512 			hw_dbg("Error Forcing Speed and Duplex\n");  in igc_setup_copper_link()
537  * igc_read_phy_reg_mdic - Read MDI control register
547 	struct igc_phy_info *phy = &hw->phy;  in igc_read_phy_reg_mdic()
553 		ret_val = -IGC_ERR_PARAM;  in igc_read_phy_reg_mdic()
557 	/* Set up Op-code, Phy Address, and register offset in the MDI  in igc_read_phy_reg_mdic()
562 		(phy->addr << IGC_MDIC_PHY_SHIFT) |  in igc_read_phy_reg_mdic()
579 		ret_val = -IGC_ERR_PHY;  in igc_read_phy_reg_mdic()
584 		ret_val = -IGC_ERR_PHY;  in igc_read_phy_reg_mdic()
594  * igc_write_phy_reg_mdic - Write MDI control register
603 	struct igc_phy_info *phy = &hw->phy;  in igc_write_phy_reg_mdic()
609 		ret_val = -IGC_ERR_PARAM;  in igc_write_phy_reg_mdic()
613 	/* Set up Op-code, Phy Address, and register offset in the MDI  in igc_write_phy_reg_mdic()
619 		(phy->addr << IGC_MDIC_PHY_SHIFT) |  in igc_write_phy_reg_mdic()
636 		ret_val = -IGC_ERR_PHY;  in igc_write_phy_reg_mdic()
641 		ret_val = -IGC_ERR_PHY;  in igc_write_phy_reg_mdic()
650  * __igc_access_xmdio_reg - Read/write XMDIO register
662 	ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAC, dev_addr);  in __igc_access_xmdio_reg()
666 	ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAAD, address);  in __igc_access_xmdio_reg()
670 	ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAC, IGC_MMDAC_FUNC_DATA |  in __igc_access_xmdio_reg()
676 		ret_val = hw->phy.ops.read_reg(hw, IGC_MMDAAD, data);  in __igc_access_xmdio_reg()
678 		ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAAD, *data);  in __igc_access_xmdio_reg()
683 	ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAC, 0);  in __igc_access_xmdio_reg()
691  * igc_read_xmdio_reg - Read XMDIO register
704  * igc_write_xmdio_reg - Write XMDIO register
717  * igc_write_phy_reg_gpy - Write GPY PHY register
733 		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()
772 		hw->phy.ops.release(hw);  in igc_read_phy_reg_gpy()