/**
* igb_reset_hw_82575 - Reset hardware
* @hw: pointer to the HW structure
*
* This resets the hardware into a known state. This is a
* function pointer entry point called by the api module.
**/
static s32 igb_reset_hw_82575(struct e1000_hw *hw)
{
u32 ctrl, icr;
s32 ret_val;
/*
* Prevent the PCI-E bus from sticking if there is no TLP connection
* on the last TLP read/write transaction when MAC is reset.
*/
ret_val = igb_disable_pcie_master(hw);
if (ret_val)
hw_dbg("PCI-E Master disable polling has failed.\n");
/* set the completion timeout for interface */
ret_val = igb_set_pcie_completion_timeout(hw);
if (ret_val) {
hw_dbg("PCI-E Set completion timeout has failed.\n");
}
hw_dbg("Masking off all interrupts\n");
wr32(E1000_IMC, 0xffffffff);
wr32(E1000_RCTL, 0);
wr32(E1000_TCTL, E1000_TCTL_PSP);
wrfl();
msleep(10);
ctrl = rd32(E1000_CTRL);
hw_dbg("Issuing a global reset to MAC\n");
wr32(E1000_CTRL, ctrl | E1000_CTRL_RST);
ret_val = igb_get_auto_rd_done(hw);
if (ret_val) {
/*
* When auto config read does not complete, do not
* return with an error. This can happen in situations
* where there is no eeprom and prevents getting link.
*/
hw_dbg("Auto Read Done did not complete\n");
}
/* If EEPROM is not present, run manual init scripts */
if ((rd32(E1000_EECD) & E1000_EECD_PRES) == 0)
igb_reset_init_script_82575(hw);
/* Clear any pending interrupt events. */
wr32(E1000_IMC, 0xffffffff);
icr = rd32(E1000_ICR);
/* Install any alternate MAC address into RAR0 */
ret_val = igb_check_alt_mac_addr(hw);
return ret_val;
}
static s32 igb_reset_hw_82575(struct e1000_hw *hw)
{
u32 ctrl, icr;
s32 ret_val;
ret_val = igb_disable_pcie_master(hw);
if (ret_val)
hw_dbg("PCI-E Master disable polling has failed.\n");
ret_val = igb_set_pcie_completion_timeout(hw);
if (ret_val) {
hw_dbg("PCI-E Set completion timeout has failed.\n");
}
hw_dbg("Masking off all interrupts\n");
wr32(E1000_IMC, 0xffffffff);
wr32(E1000_RCTL, 0);
wr32(E1000_TCTL, E1000_TCTL_PSP);
wrfl();
msleep(10);
ctrl = rd32(E1000_CTRL);
hw_dbg("Issuing a global reset to MAC\n");
wr32(E1000_CTRL, ctrl | E1000_CTRL_RST);
ret_val = igb_get_auto_rd_done(hw);
if (ret_val) {
hw_dbg("Auto Read Done did not complete\n");
}
if ((rd32(E1000_EECD) & E1000_EECD_PRES) == 0)
igb_reset_init_script_82575(hw);
wr32(E1000_IMC, 0xffffffff);
icr = rd32(E1000_ICR);
ret_val = igb_check_alt_mac_addr(hw);
return ret_val;
}