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
71 		 * twice due to the link bit being sticky.  No harm doing  in igc_phy_has_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
170  * bit in the PHY.  Wait the appropriate delay time for the device to
175 	struct igc_phy_info *phy = &hw->phy;  in igc_phy_hw_reset()
186 	ret_val = phy->ops.acquire(hw);  in igc_phy_hw_reset()
196 	udelay(phy->reset_delay_us);  in igc_phy_hw_reset()
205 		timeout--;  in igc_phy_hw_reset()
214 	phy->ops.release(hw);  in igc_phy_hw_reset()
221  * igc_phy_setup_autoneg - Configure PHY for auto-negotiation
224  * Reads the MII auto-neg advertisement register and/or the 1000T control
225  * register and if the PHY is already setup for auto-negotiation, then
227  * the appropriate values for the wanted auto-negotiation.
231 	struct igc_phy_info *phy = &hw->phy;  in igc_phy_setup_autoneg()
237 	phy->autoneg_advertised &= phy->autoneg_mask;  in igc_phy_setup_autoneg()
239 	/* Read the MII Auto-Neg Advertisement Register (Address 4). */  in igc_phy_setup_autoneg()
240 	ret_val = phy->ops.read_reg(hw, PHY_AUTONEG_ADV, &mii_autoneg_adv_reg);  in igc_phy_setup_autoneg()
244 	if (phy->autoneg_mask & ADVERTISE_1000_FULL) {  in igc_phy_setup_autoneg()
245 		/* Read the MII 1000Base-T Control Register (Address 9). */  in igc_phy_setup_autoneg()
246 		ret_val = phy->ops.read_reg(hw, PHY_1000T_CTRL,  in igc_phy_setup_autoneg()
252 	if (phy->autoneg_mask & ADVERTISE_2500_FULL) {  in igc_phy_setup_autoneg()
253 		/* Read the MULTI GBT AN Control Register - reg 7.32 */  in igc_phy_setup_autoneg()
254 		ret_val = phy->ops.read_reg(hw, (STANDARD_AN_REG_MASK <<  in igc_phy_setup_autoneg()
266 	 * a plethora of combinations, we need to check each bit  in igc_phy_setup_autoneg()
270 	/* First we clear all the 10/100 mb speed bits in the Auto-Neg  in igc_phy_setup_autoneg()
272 	 * the  1000Base-T Control Register (Address 9).  in igc_phy_setup_autoneg()
280 	hw_dbg("autoneg_advertised %x\n", phy->autoneg_advertised);  in igc_phy_setup_autoneg()
282 	/* Do we want to advertise 10 Mb Half Duplex? */  in igc_phy_setup_autoneg()
283 	if (phy->autoneg_advertised & ADVERTISE_10_HALF) {  in igc_phy_setup_autoneg()
284 		hw_dbg("Advertise 10mb Half duplex\n");  in igc_phy_setup_autoneg()
289 	if (phy->autoneg_advertised & ADVERTISE_10_FULL) {  in igc_phy_setup_autoneg()
294 	/* Do we want to advertise 100 Mb Half Duplex? */  in igc_phy_setup_autoneg()
295 	if (phy->autoneg_advertised & ADVERTISE_100_HALF) {  in igc_phy_setup_autoneg()
296 		hw_dbg("Advertise 100mb Half duplex\n");  in igc_phy_setup_autoneg()
301 	if (phy->autoneg_advertised & ADVERTISE_100_FULL) {  in igc_phy_setup_autoneg()
306 	/* We do not allow the Phy to advertise 1000 Mb Half Duplex */  in igc_phy_setup_autoneg()
307 	if (phy->autoneg_advertised & ADVERTISE_1000_HALF)  in igc_phy_setup_autoneg()
308 		hw_dbg("Advertise 1000mb Half duplex request denied!\n");  in igc_phy_setup_autoneg()
311 	if (phy->autoneg_advertised & ADVERTISE_1000_FULL) {  in igc_phy_setup_autoneg()
316 	/* We do not allow the Phy to advertise 2500 Mb Half Duplex */  in igc_phy_setup_autoneg()
317 	if (phy->autoneg_advertised & ADVERTISE_2500_HALF)  in igc_phy_setup_autoneg()
318 		hw_dbg("Advertise 2500mb Half duplex request denied!\n");  in igc_phy_setup_autoneg()
321 	if (phy->autoneg_advertised & ADVERTISE_2500_FULL) {  in igc_phy_setup_autoneg()
330 	 * auto-negotiation is enabled, then software will have to set the  in igc_phy_setup_autoneg()
331 	 * "PAUSE" bits to the correct value in the Auto-Negotiation  in igc_phy_setup_autoneg()
332 	 * Advertisement Register (PHY_AUTONEG_ADV) and re-start auto-  in igc_phy_setup_autoneg()
345 	switch (hw->fc.current_mode) {  in igc_phy_setup_autoneg()
348 		 * software over-ride.  in igc_phy_setup_autoneg()
354 		 * disabled, by a software over-ride.  in igc_phy_setup_autoneg()
366 		 * disabled, by a software over-ride.  in igc_phy_setup_autoneg()
373 		 * over-ride.  in igc_phy_setup_autoneg()
379 		return -IGC_ERR_CONFIG;  in igc_phy_setup_autoneg()
382 	ret_val = phy->ops.write_reg(hw, PHY_AUTONEG_ADV, mii_autoneg_adv_reg);  in igc_phy_setup_autoneg()
386 	hw_dbg("Auto-Neg Advertising %x\n", mii_autoneg_adv_reg);  in igc_phy_setup_autoneg()
388 	if (phy->autoneg_mask & ADVERTISE_1000_FULL)  in igc_phy_setup_autoneg()
389 		ret_val = phy->ops.write_reg(hw, PHY_1000T_CTRL,  in igc_phy_setup_autoneg()
392 	if (phy->autoneg_mask & ADVERTISE_2500_FULL)  in igc_phy_setup_autoneg()
393 		ret_val = phy->ops.write_reg(hw,  in igc_phy_setup_autoneg()
403  * igc_wait_autoneg - Wait for auto-neg completion
406  * Waits for auto-negotiation to complete or for the auto-negotiation time
415 	for (i = PHY_AUTO_NEG_LIMIT; i > 0; i--) {  in igc_wait_autoneg()
416 		ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status);  in igc_wait_autoneg()
419 		ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status);  in igc_wait_autoneg()
427 	/* PHY_AUTO_NEG_TIME expiration doesn't guarantee auto-negotiation  in igc_wait_autoneg()
434  * igc_copper_link_autoneg - Setup/Enable autoneg for copper link
444 	struct igc_phy_info *phy = &hw->phy;  in igc_copper_link_autoneg()
451 	phy->autoneg_advertised &= phy->autoneg_mask;  in igc_copper_link_autoneg()
456 	if (phy->autoneg_advertised == 0)  in igc_copper_link_autoneg()
457 		phy->autoneg_advertised = phy->autoneg_mask;  in igc_copper_link_autoneg()
459 	hw_dbg("Reconfiguring auto-neg advertisement params\n");  in igc_copper_link_autoneg()
462 		hw_dbg("Error Setting up Auto-Negotiation\n");  in igc_copper_link_autoneg()
465 	hw_dbg("Restarting Auto-Neg\n");  in igc_copper_link_autoneg()
467 	/* Restart auto-negotiation by setting the Auto Neg Enable bit and  in igc_copper_link_autoneg()
468 	 * the Auto Neg Restart bit in the PHY control register.  in igc_copper_link_autoneg()
470 	ret_val = phy->ops.read_reg(hw, PHY_CONTROL, &phy_ctrl);  in igc_copper_link_autoneg()
475 	ret_val = phy->ops.write_reg(hw, PHY_CONTROL, phy_ctrl);  in igc_copper_link_autoneg()
479 	/* Does the user want to wait for Auto-Neg to complete here, or  in igc_copper_link_autoneg()
482 	if (phy->autoneg_wait_to_complete) {  in igc_copper_link_autoneg()
490 	hw->mac.get_link_status = true;  in igc_copper_link_autoneg()
497  * igc_setup_copper_link - Configure copper link settings
500  * Calls the appropriate function to configure the link for auto-neg or forced
503  * not established, we return -IGC_ERR_PHY (-2).
510 	if (hw->mac.autoneg) {  in igc_setup_copper_link()
522 		ret_val = hw->phy.ops.force_speed_duplex(hw);  in igc_setup_copper_link()
549  * igc_read_phy_reg_mdic - Read MDI control register
559 	struct igc_phy_info *phy = &hw->phy;  in igc_read_phy_reg_mdic()
565 		ret_val = -IGC_ERR_PARAM;  in igc_read_phy_reg_mdic()
569 	/* Set up Op-code, Phy Address, and register offset in the MDI  in igc_read_phy_reg_mdic()
574 		(phy->addr << IGC_MDIC_PHY_SHIFT) |  in igc_read_phy_reg_mdic()
579 	/* Poll the ready bit to see if the MDI read completed  in igc_read_phy_reg_mdic()
591 		ret_val = -IGC_ERR_PHY;  in igc_read_phy_reg_mdic()
596 		ret_val = -IGC_ERR_PHY;  in igc_read_phy_reg_mdic()
606  * igc_write_phy_reg_mdic - Write MDI control register
615 	struct igc_phy_info *phy = &hw->phy;  in igc_write_phy_reg_mdic()
621 		ret_val = -IGC_ERR_PARAM;  in igc_write_phy_reg_mdic()
625 	/* Set up Op-code, Phy Address, and register offset in the MDI  in igc_write_phy_reg_mdic()
631 		(phy->addr << IGC_MDIC_PHY_SHIFT) |  in igc_write_phy_reg_mdic()
636 	/* Poll the ready bit to see if the MDI read completed  in igc_write_phy_reg_mdic()
648 		ret_val = -IGC_ERR_PHY;  in igc_write_phy_reg_mdic()
653 		ret_val = -IGC_ERR_PHY;  in igc_write_phy_reg_mdic()
662  * __igc_access_xmdio_reg - Read/write XMDIO register
674 	ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAC, dev_addr);  in __igc_access_xmdio_reg()
678 	ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAAD, address);  in __igc_access_xmdio_reg()
682 	ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAC, IGC_MMDAC_FUNC_DATA |  in __igc_access_xmdio_reg()
688 		ret_val = hw->phy.ops.read_reg(hw, IGC_MMDAAD, data);  in __igc_access_xmdio_reg()
690 		ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAAD, *data);  in __igc_access_xmdio_reg()
695 	ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAC, 0);  in __igc_access_xmdio_reg()
703  * igc_read_xmdio_reg - Read XMDIO register
716  * igc_write_xmdio_reg - Write XMDIO register
729  * igc_write_phy_reg_gpy - Write GPY PHY register
745 		ret_val = hw->phy.ops.acquire(hw);  in igc_write_phy_reg_gpy()
751 		hw->phy.ops.release(hw);  in igc_write_phy_reg_gpy()
761  * igc_read_phy_reg_gpy - Read GPY PHY register
763  * @offset: lower half is register offset to read to
764  * upper half is MMD to use.
778 		ret_val = hw->phy.ops.acquire(hw);  in igc_read_phy_reg_gpy()
784 		hw->phy.ops.release(hw);  in igc_read_phy_reg_gpy()
794  * igc_read_phy_fw_version - Read gPHY firmware version
799 	struct igc_phy_info *phy = &hw->phy;  in igc_read_phy_fw_version()
804 	ret_val = phy->ops.read_reg(hw, IGC_GPHY_VERSION, &gphy_version);  in igc_read_phy_fw_version()