1 // SPDX-License-Identifier: GPL-2.0
8  * igc_check_reset_block - Check if PHY reset is blocked
11  * Read the PHY management control register and check whether a PHY reset
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
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()
134 	/* Temporary workaround - should be removed when PHY will implement  in igc_power_down_phy_copper()
137 	/* hw->phy.ops.write_reg(hw, PHY_CONTROL, mii_reg);*/  in igc_power_down_phy_copper()
142  * igc_check_downshift - Checks whether a downshift in speed occurred
149 	struct igc_phy_info *phy = &hw->phy;  in igc_check_downshift()
152 	phy->speed_downgraded = false;  in igc_check_downshift()
156  * igc_phy_hw_reset - PHY hardware reset
160  * semaphore (if necessary) and read/set/write the device control reset
166 	struct igc_phy_info *phy = &hw->phy;  in igc_phy_hw_reset()
177 	ret_val = phy->ops.acquire(hw);  in igc_phy_hw_reset()
187 	udelay(phy->reset_delay_us);  in igc_phy_hw_reset()
196 		timeout--;  in igc_phy_hw_reset()
205 	phy->ops.release(hw);  in igc_phy_hw_reset()
212  * igc_phy_setup_autoneg - Configure PHY for auto-negotiation
215  * Reads the MII auto-neg advertisement register and/or the 1000T control
216  * register and if the PHY is already setup for auto-negotiation, then
217  * return successful.  Otherwise, setup advertisement and flow control to
218  * the appropriate values for the wanted auto-negotiation.
222 	struct igc_phy_info *phy = &hw->phy;  in igc_phy_setup_autoneg()
228 	phy->autoneg_advertised &= phy->autoneg_mask;  in igc_phy_setup_autoneg()
230 	/* Read the MII Auto-Neg Advertisement Register (Address 4). */  in igc_phy_setup_autoneg()
231 	ret_val = phy->ops.read_reg(hw, PHY_AUTONEG_ADV, &mii_autoneg_adv_reg);  in igc_phy_setup_autoneg()
235 	if (phy->autoneg_mask & ADVERTISE_1000_FULL) {  in igc_phy_setup_autoneg()
236 		/* Read the MII 1000Base-T Control Register (Address 9). */  in igc_phy_setup_autoneg()
237 		ret_val = phy->ops.read_reg(hw, PHY_1000T_CTRL,  in igc_phy_setup_autoneg()
243 	if (phy->autoneg_mask & ADVERTISE_2500_FULL) {  in igc_phy_setup_autoneg()
244 		/* Read the MULTI GBT AN Control Register - reg 7.32 */  in igc_phy_setup_autoneg()
245 		ret_val = phy->ops.read_reg(hw, (STANDARD_AN_REG_MASK <<  in igc_phy_setup_autoneg()
261 	/* First we clear all the 10/100 mb speed bits in the Auto-Neg  in igc_phy_setup_autoneg()
263 	 * the  1000Base-T Control Register (Address 9).  in igc_phy_setup_autoneg()
271 	hw_dbg("autoneg_advertised %x\n", phy->autoneg_advertised);  in igc_phy_setup_autoneg()
274 	if (phy->autoneg_advertised & ADVERTISE_10_HALF) {  in igc_phy_setup_autoneg()
280 	if (phy->autoneg_advertised & ADVERTISE_10_FULL) {  in igc_phy_setup_autoneg()
286 	if (phy->autoneg_advertised & ADVERTISE_100_HALF) {  in igc_phy_setup_autoneg()
292 	if (phy->autoneg_advertised & ADVERTISE_100_FULL) {  in igc_phy_setup_autoneg()
298 	if (phy->autoneg_advertised & ADVERTISE_1000_HALF)  in igc_phy_setup_autoneg()
302 	if (phy->autoneg_advertised & ADVERTISE_1000_FULL) {  in igc_phy_setup_autoneg()
308 	if (phy->autoneg_advertised & ADVERTISE_2500_HALF)  in igc_phy_setup_autoneg()
312 	if (phy->autoneg_advertised & ADVERTISE_2500_FULL) {  in igc_phy_setup_autoneg()
319 	/* Check for a software override of the flow control settings, and  in igc_phy_setup_autoneg()
321 	 * auto-negotiation is enabled, then software will have to set the  in igc_phy_setup_autoneg()
322 	 * "PAUSE" bits to the correct value in the Auto-Negotiation  in igc_phy_setup_autoneg()
323 	 * Advertisement Register (PHY_AUTONEG_ADV) and re-start auto-  in igc_phy_setup_autoneg()
327 	 *      0:  Flow control is completely disabled  in igc_phy_setup_autoneg()
328 	 *      1:  Rx flow control is enabled (we can receive pause frames  in igc_phy_setup_autoneg()
330 	 *      2:  Tx flow control is enabled (we can send pause frames  in igc_phy_setup_autoneg()
332 	 *      3:  Both Rx and Tx flow control (symmetric) are enabled.  in igc_phy_setup_autoneg()
333 	 *  other:  No software override.  The flow control configuration  in igc_phy_setup_autoneg()
336 	switch (hw->fc.current_mode) {  in igc_phy_setup_autoneg()
338 		/* Flow control (Rx & Tx) is completely disabled by a  in igc_phy_setup_autoneg()
339 		 * software over-ride.  in igc_phy_setup_autoneg()
344 		/* Rx Flow control is enabled, and Tx Flow control is  in igc_phy_setup_autoneg()
345 		 * disabled, by a software over-ride.  in igc_phy_setup_autoneg()
356 		/* Tx Flow control is enabled, and Rx Flow control is  in igc_phy_setup_autoneg()
357 		 * disabled, by a software over-ride.  in igc_phy_setup_autoneg()
363 		/* Flow control (both Rx and Tx) is enabled by a software  in igc_phy_setup_autoneg()
364 		 * over-ride.  in igc_phy_setup_autoneg()
369 		hw_dbg("Flow control param set incorrectly\n");  in igc_phy_setup_autoneg()
370 		return -IGC_ERR_CONFIG;  in igc_phy_setup_autoneg()
373 	ret_val = phy->ops.write_reg(hw, PHY_AUTONEG_ADV, mii_autoneg_adv_reg);  in igc_phy_setup_autoneg()
377 	hw_dbg("Auto-Neg Advertising %x\n", mii_autoneg_adv_reg);  in igc_phy_setup_autoneg()
379 	if (phy->autoneg_mask & ADVERTISE_1000_FULL)  in igc_phy_setup_autoneg()
380 		ret_val = phy->ops.write_reg(hw, PHY_1000T_CTRL,  in igc_phy_setup_autoneg()
383 	if (phy->autoneg_mask & ADVERTISE_2500_FULL)  in igc_phy_setup_autoneg()
384 		ret_val = phy->ops.write_reg(hw,  in igc_phy_setup_autoneg()
394  * igc_wait_autoneg - Wait for auto-neg completion
397  * Waits for auto-negotiation to complete or for the auto-negotiation time
406 	for (i = PHY_AUTO_NEG_LIMIT; i > 0; i--) {  in igc_wait_autoneg()
407 		ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status);  in igc_wait_autoneg()
410 		ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status);  in igc_wait_autoneg()
418 	/* PHY_AUTO_NEG_TIME expiration doesn't guarantee auto-negotiation  in igc_wait_autoneg()
425  * igc_copper_link_autoneg - Setup/Enable autoneg for copper link
435 	struct igc_phy_info *phy = &hw->phy;  in igc_copper_link_autoneg()
442 	phy->autoneg_advertised &= phy->autoneg_mask;  in igc_copper_link_autoneg()
447 	if (phy->autoneg_advertised == 0)  in igc_copper_link_autoneg()
448 		phy->autoneg_advertised = phy->autoneg_mask;  in igc_copper_link_autoneg()
450 	hw_dbg("Reconfiguring auto-neg advertisement params\n");  in igc_copper_link_autoneg()
453 		hw_dbg("Error Setting up Auto-Negotiation\n");  in igc_copper_link_autoneg()
456 	hw_dbg("Restarting Auto-Neg\n");  in igc_copper_link_autoneg()
458 	/* Restart auto-negotiation by setting the Auto Neg Enable bit and  in igc_copper_link_autoneg()
459 	 * the Auto Neg Restart bit in the PHY control register.  in igc_copper_link_autoneg()
461 	ret_val = phy->ops.read_reg(hw, PHY_CONTROL, &phy_ctrl);  in igc_copper_link_autoneg()
466 	ret_val = phy->ops.write_reg(hw, PHY_CONTROL, phy_ctrl);  in igc_copper_link_autoneg()
470 	/* Does the user want to wait for Auto-Neg to complete here, or  in igc_copper_link_autoneg()
473 	if (phy->autoneg_wait_to_complete) {  in igc_copper_link_autoneg()
481 	hw->mac.get_link_status = true;  in igc_copper_link_autoneg()
488  * igc_setup_copper_link - Configure copper link settings
491  * Calls the appropriate function to configure the link for auto-neg or forced
493  * to configure collision distance and flow control are called.  If link is
494  * not established, we return -IGC_ERR_PHY (-2).
501 	if (hw->mac.autoneg) {  in igc_setup_copper_link()
502 		/* Setup autoneg and flow control advertisement and perform  in igc_setup_copper_link()
513 		ret_val = hw->phy.ops.force_speed_duplex(hw);  in igc_setup_copper_link()
540  * igc_read_phy_reg_mdic - Read MDI control register
545  * Reads the MDI control register in the PHY at offset and stores the
550 	struct igc_phy_info *phy = &hw->phy;  in igc_read_phy_reg_mdic()
556 		ret_val = -IGC_ERR_PARAM;  in igc_read_phy_reg_mdic()
560 	/* Set up Op-code, Phy Address, and register offset in the MDI  in igc_read_phy_reg_mdic()
561 	 * Control register.  The MAC will take care of interfacing with the  in igc_read_phy_reg_mdic()
565 		(phy->addr << IGC_MDIC_PHY_SHIFT) |  in igc_read_phy_reg_mdic()
582 		ret_val = -IGC_ERR_PHY;  in igc_read_phy_reg_mdic()
587 		ret_val = -IGC_ERR_PHY;  in igc_read_phy_reg_mdic()
597  * igc_write_phy_reg_mdic - Write MDI control register
602  * Writes data to MDI control register in the PHY at offset.
606 	struct igc_phy_info *phy = &hw->phy;  in igc_write_phy_reg_mdic()
612 		ret_val = -IGC_ERR_PARAM;  in igc_write_phy_reg_mdic()
616 	/* Set up Op-code, Phy Address, and register offset in the MDI  in igc_write_phy_reg_mdic()
617 	 * Control register.  The MAC will take care of interfacing with the  in igc_write_phy_reg_mdic()
622 		(phy->addr << IGC_MDIC_PHY_SHIFT) |  in igc_write_phy_reg_mdic()
639 		ret_val = -IGC_ERR_PHY;  in igc_write_phy_reg_mdic()
644 		ret_val = -IGC_ERR_PHY;  in igc_write_phy_reg_mdic()
653  * __igc_access_xmdio_reg - Read/write XMDIO register
665 	ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAC, dev_addr);  in __igc_access_xmdio_reg()
669 	ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAAD, address);  in __igc_access_xmdio_reg()
673 	ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAC, IGC_MMDAC_FUNC_DATA |  in __igc_access_xmdio_reg()
679 		ret_val = hw->phy.ops.read_reg(hw, IGC_MMDAAD, data);  in __igc_access_xmdio_reg()
681 		ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAAD, *data);  in __igc_access_xmdio_reg()
686 	ret_val = hw->phy.ops.write_reg(hw, IGC_MMDAC, 0);  in __igc_access_xmdio_reg()
694  * igc_read_xmdio_reg - Read XMDIO register
707  * igc_write_xmdio_reg - Write XMDIO register
720  * igc_write_phy_reg_gpy - Write GPY PHY register
736 		ret_val = hw->phy.ops.acquire(hw);  in igc_write_phy_reg_gpy()
740 		hw->phy.ops.release(hw);  in igc_write_phy_reg_gpy()
750  * igc_read_phy_reg_gpy - Read GPY PHY register
767 		ret_val = hw->phy.ops.acquire(hw);  in igc_read_phy_reg_gpy()
771 		hw->phy.ops.release(hw);  in igc_read_phy_reg_gpy()
781  * igc_read_phy_fw_version - Read gPHY firmware version
786 	struct igc_phy_info *phy = &hw->phy;  in igc_read_phy_fw_version()
791 	ret_val = phy->ops.read_reg(hw, IGC_GPHY_VERSION, &gphy_version);  in igc_read_phy_fw_version()