dev/e1000/e1000_ich8lan.c

116 static s32  e1000_k1_gig_workaround_hv(struct e1000_hw *hw, bool link);
760 	/* link setup */
764 	/* check for link */
766 	/* link info */
899  *  the link and the EEE capabilities of the link partner.  The LPI Control
900  *  register bits will remain set only if/when link is up.
902  *  EEE LPI must not be asserted earlier than one second after link is up.
904  *  can be link issues with some switches.  Other devices can have EEE LPI
905  *  enabled immediately upon link up since they have a timer in hardware which
944 		/* Save off link partner's EEE ability */
955 		/* Enable EEE only for speeds in which the link partner is
1001  *  @link: link up bool flag
1006  *  Also, set appropriate Tx re-transmission timeouts for 10 and 100Half link
1009 static s32 e1000_k1_workaround_lpt_lp(struct e1000_hw *hw, bool link)
1016 	if (link && (status & E1000_STATUS_SPEED_1000)) {
1047 		/* clear FEXTNVM6 bit 8 on link down or 10/100 */
1050 		if ((hw->phy.revision > 5) || !link ||
1059 		/* Clear link status transmit timeout */
1102  *  @link: bool indicating link status
1105  *  GbE MAC in the Lynx Point PCH based on Rx buffer size and link speed
1106  *  when link is up (which must not exceed the maximum latency supported
1118 static s32 e1000_platform_pm_pch_lpt(struct e1000_hw *hw, bool link)
1120 	u32 reg = link << (E1000_LTRV_REQ_SHIFT + E1000_LTRV_NOSNOOP_SHIFT) |
1121 		  link << E1000_LTRV_REQ_SHIFT | E1000_LTRV_SEND;
1127 	if (link) {
1255  *  When link is down, configure ULP mode to significantly reduce the power
1290 			/* Bail if link is re-acquired */
1396  *  Un-configure ULP mode when link is up, the system is transitioned from
1401  *  During nominal operation, this function is called when link is acquired
1537  *  e1000_check_for_copper_link_ich8lan - Check for link (Copper)
1540  *  Checks to see of the link status of the hardware has changed.  If a
1541  *  change in link status has been detected, then we read the PHY registers
1542  *  to get the current speed/duplex if link exists.
1549 	bool link;
1555 	 * has completed and/or if our link status has changed.  The
1563 		 * link.  If so, then we want to get the current speed/duplex
1566 		ret_val = e1000_phy_has_link_generic(hw, 1, 0, &link);
1571 		ret_val = e1000_k1_gig_workaround_hv(hw, link);
1580 	if ((hw->mac.type >= e1000_pch2lan) && link) {
1706 		ret_val = e1000_k1_workaround_lpt_lp(hw, link);
1715 		ret_val = e1000_platform_pm_pch_lpt(hw, link);
1720 	/* Clear link partner's EEE ability */
1742 	if (!link)
1743 		return E1000_SUCCESS; /* No link detected */
1779 	 * immediately after link-up
1783 	/* Enable/Disable EEE after link up */
1791 	 * we have already determined whether we have link or not.
1805 	 * different link partner.
2391  *  @link: link up bool flag
2394  *  from a lower speed.  This workaround disables K1 whenever link is at 1Gig
2395  *  If link is down, the function will restore the default K1 setting located
2398 static s32 e1000_k1_gig_workaround_hv(struct e1000_hw *hw, bool link)
2414 	/* Disable K1 when link is 1Gbps, otherwise use the NVM setting */
2415 	if (link) {
2448 		/* Link stall fix for link up */
2455 		/* Link stall fix for link down */
2679 	 * link so that it disables K1 if link is in 1Gbps.
2685 	/* Workaround for link disconnects on a busy hub in half duplex */
2697 	/* set MSE higher to enable link to stay up when noise is high */
2960 	/* set MSE higher to enable link to stay up when noise is high */
2964 	/* drop link after 5 times MSE threshold was reached */
3071 	 * leave the PHY in a bad state possibly resulting in no link.
4858  *  link based on logic in e1000_led_[on|off]_pchlan().
5114 	/* Setup link and flow control */
5145 	 * important that we do this after we have tried to establish link
5147 	 * is no link.
5236  *  e1000_setup_link_ich8lan - Setup flow control and link settings
5240  *  control.  Calls the appropriate media-specific link configuration
5241  *  function.  Assuming the adapter has a valid link partner, a valid link
5262 	 * on the link partner's capabilities, we may or may not use this mode.
5269 	/* Continue to configure the copper link. */
5297  *  configuring the copper link.
5386  *  Calls the PHY specific link setup function and then calls the
5387  *  generic setup_copper_link to finish configuring the link for
5410  *  e1000_get_link_up_info_ich8lan - Get current link speed and duplex
5412  *  @speed: pointer to store current link speed
5413  *  @duplex: pointer to store the current link duplex
5415  *  Calls the generic get_speed_and_duplex to retrieve the current link
5444  *  On link status change (i.e. PCI reset, speed change) and link is up and
5447  *    1) wait 1ms for Kumeran link to come up
5449  *    3) if not set the link is locked (all is good), otherwise...
5460 	bool link;
5467 	/* Make sure link is up before proceeding.  If not just return.
5468 	 * Attempting this while link is negotiating fouled up link
5471 	ret_val = e1000_phy_has_link_generic(hw, 1, 0, &link);
5472 	if (!link)
5493 	/* Disable GigE link negotiation */
5538  *    1) disable gigabit link
5556 		/* Disable link */
5591  *  Steps to take when dropping from 1Gb/s (eg. link cable removal (LSC),
5627  *  During S0 to Sx transition, it is possible the link remains at gig
5629  *  'Gig Disable' to force link speed negotiation to a lower speed based on
5676 			/* Disable LPLU if both link partners support 100BaseT
5678 			 * link, and enable Auto Enable LPI since there will
5688 				/* Set Auto Enable LPI after link up */
5799 		/* Clear Auto Enable LPI after link up */
5930 	/* If no link, then turn LED on by setting the invert bit
5962 	/* If no link, then turn LED off by clearing the invert bit
5991  *  or change link.
6011 			 * where there is no eeprom and prevents getting link.
6043  * e1000_power_down_phy_copper_ich8lan - Remove link during PHY power down
6046  * In the case of a PHY power down to save power, or to turn off link during a
6047  * driver unload, or wake on lan is not enabled, remove the link.