e1000_ich8lan.c

linux系统的网卡驱动包

				 * a few more times else Done
				 */
				hsfsts.regval = E1000_READ_FLASH_REG16(hw,
				                              ICH_FLASH_HSFSTS);
				if (hsfsts.hsf_status.flcerr == 1) {
					/*
					 * repeat for some time before
					 * giving up
					 */
					continue;
				} else if (hsfsts.hsf_status.flcdone == 0)
					goto out;
			}
		} while (++count < ICH_FLASH_CYCLE_REPEAT_COUNT);
	}

out:
	return ret_val;
}

/**
 *  e1000_valid_led_default_ich8lan - Set the default LED settings
 *  @hw: pointer to the HW structure
 *  @data: Pointer to the LED settings
 *
 *  Reads the LED default settings from the NVM to data.  If the NVM LED
 *  settings is all 0's or F's, set the LED default to a valid LED default
 *  setting.
 **/
static s32 e1000_valid_led_default_ich8lan(struct e1000_hw *hw, u16 *data)
{
	s32 ret_val;

	DEBUGFUNC("e1000_valid_led_default_ich8lan");

	ret_val = e1000_read_nvm(hw, NVM_ID_LED_SETTINGS, 1, data);
	if (ret_val) {
		DEBUGOUT("NVM Read Error\n");
		goto out;
	}

	if (*data == ID_LED_RESERVED_0000 ||
	    *data == ID_LED_RESERVED_FFFF)
		*data = ID_LED_DEFAULT_ICH8LAN;

out:
	return ret_val;
}

/**
 *  e1000_get_bus_info_ich8lan - Get/Set the bus type and width
 *  @hw: pointer to the HW structure
 *
 *  ICH8 use the PCI Express bus, but does not contain a PCI Express Capability
 *  register, so the the bus width is hard coded.
 **/
static s32 e1000_get_bus_info_ich8lan(struct e1000_hw *hw)
{
	struct e1000_bus_info *bus = &hw->bus;
	s32 ret_val;

	DEBUGFUNC("e1000_get_bus_info_ich8lan");

	ret_val = e1000_get_bus_info_pcie_generic(hw);

	/*
	 * ICH devices are "PCI Express"-ish.  They have
	 * a configuration space, but do not contain
	 * PCI Express Capability registers, so bus width
	 * must be hardcoded.
	 */
	if (bus->width == e1000_bus_width_unknown)
		bus->width = e1000_bus_width_pcie_x1;

	return ret_val;
}

/**
 *  e1000_reset_hw_ich8lan - Reset the hardware
 *  @hw: pointer to the HW structure
 *
 *  Does a full reset of the hardware which includes a reset of the PHY and
 *  MAC.
 **/
static s32 e1000_reset_hw_ich8lan(struct e1000_hw *hw)
{
	u32 ctrl, icr, kab;
	s32 ret_val;

	DEBUGFUNC("e1000_reset_hw_ich8lan");

	/*
	 * 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 = e1000_disable_pcie_master_generic(hw);
	if (ret_val) {
		DEBUGOUT("PCI-E Master disable polling has failed.\n");
	}

	DEBUGOUT("Masking off all interrupts\n");
	E1000_WRITE_REG(hw, E1000_IMC, 0xffffffff);

	/*
	 * Disable the Transmit and Receive units.  Then delay to allow
	 * any pending transactions to complete before we hit the MAC
	 * with the global reset.
	 */
	E1000_WRITE_REG(hw, E1000_RCTL, 0);
	E1000_WRITE_REG(hw, E1000_TCTL, E1000_TCTL_PSP);
	E1000_WRITE_FLUSH(hw);

	msec_delay(10);

	/* Workaround for ICH8 bit corruption issue in FIFO memory */
	if (hw->mac.type == e1000_ich8lan) {
		/* Set Tx and Rx buffer allocation to 8k apiece. */
		E1000_WRITE_REG(hw, E1000_PBA, E1000_PBA_8K);
		/* Set Packet Buffer Size to 16k. */
		E1000_WRITE_REG(hw, E1000_PBS, E1000_PBS_16K);
	}

	ctrl = E1000_READ_REG(hw, E1000_CTRL);

	if (!e1000_check_reset_block(hw) && !hw->phy.reset_disable) {
		/*
		 * PHY HW reset requires MAC CORE reset at the same
		 * time to make sure the interface between MAC and the
		 * external PHY is reset.
		 */
		ctrl |= E1000_CTRL_PHY_RST;
	}
	ret_val = e1000_acquire_swflag_ich8lan(hw);
	DEBUGOUT("Issuing a global reset to ich8lan");
	E1000_WRITE_REG(hw, E1000_CTRL, (ctrl | E1000_CTRL_RST));
	msec_delay(20);

	ret_val = e1000_get_auto_rd_done_generic(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.
		 */
		DEBUGOUT("Auto Read Done did not complete\n");
	}

	E1000_WRITE_REG(hw, E1000_IMC, 0xffffffff);
	icr = E1000_READ_REG(hw, E1000_ICR);

	kab = E1000_READ_REG(hw, E1000_KABGTXD);
	kab |= E1000_KABGTXD_BGSQLBIAS;
	E1000_WRITE_REG(hw, E1000_KABGTXD, kab);

	return ret_val;
}

/**
 *  e1000_init_hw_ich8lan - Initialize the hardware
 *  @hw: pointer to the HW structure
 *
 *  Prepares the hardware for transmit and receive by doing the following:
 *   - initialize hardware bits
 *   - initialize LED identification
 *   - setup receive address registers
 *   - setup flow control
 *   - setup transmit discriptors
 *   - clear statistics
 **/
static s32 e1000_init_hw_ich8lan(struct e1000_hw *hw)
{
	struct e1000_mac_info *mac = &hw->mac;
	u32 ctrl_ext, txdctl, snoop;
	s32 ret_val;
	u16 i;

	DEBUGFUNC("e1000_init_hw_ich8lan");

	e1000_initialize_hw_bits_ich8lan(hw);

	/* Initialize identification LED */
	ret_val = e1000_id_led_init_generic(hw);
	if (ret_val) {
		DEBUGOUT("Error initializing identification LED\n");
		/* This is not fatal and we should not stop init due to this */
	}

	/* Setup the receive address. */
	e1000_init_rx_addrs_generic(hw, mac->rar_entry_count);

	/* Zero out the Multicast HASH table */
	DEBUGOUT("Zeroing the MTA\n");
	for (i = 0; i < mac->mta_reg_count; i++)
		E1000_WRITE_REG_ARRAY(hw, E1000_MTA, i, 0);

	/* Setup link and flow control */
	ret_val = e1000_setup_link(hw);

	/* Set the transmit descriptor write-back policy for both queues */
	txdctl = E1000_READ_REG(hw, E1000_TXDCTL(0));
	txdctl = (txdctl & ~E1000_TXDCTL_WTHRESH) |
		 E1000_TXDCTL_FULL_TX_DESC_WB;
	txdctl = (txdctl & ~E1000_TXDCTL_PTHRESH) |
	         E1000_TXDCTL_MAX_TX_DESC_PREFETCH;
	E1000_WRITE_REG(hw, E1000_TXDCTL(0), txdctl);
	txdctl = E1000_READ_REG(hw, E1000_TXDCTL(1));
	txdctl = (txdctl & ~E1000_TXDCTL_WTHRESH) |
		 E1000_TXDCTL_FULL_TX_DESC_WB;
	txdctl = (txdctl & ~E1000_TXDCTL_PTHRESH) |
	         E1000_TXDCTL_MAX_TX_DESC_PREFETCH;
	E1000_WRITE_REG(hw, E1000_TXDCTL(1), txdctl);

	/*
	 * ICH8 has opposite polarity of no_snoop bits.
	 * By default, we should use snoop behavior.
	 */
	if (mac->type == e1000_ich8lan)
		snoop = PCIE_ICH8_SNOOP_ALL;
	else
		snoop = (u32)~(PCIE_NO_SNOOP_ALL);
	e1000_set_pcie_no_snoop_generic(hw, snoop);

	ctrl_ext = E1000_READ_REG(hw, E1000_CTRL_EXT);
	ctrl_ext |= E1000_CTRL_EXT_RO_DIS;
	E1000_WRITE_REG(hw, E1000_CTRL_EXT, ctrl_ext);

	/*
	 * Clear all of the statistics registers (clear on read).  It is
	 * important that we do this after we have tried to establish link
	 * because the symbol error count will increment wildly if there
	 * is no link.
	 */
	e1000_clear_hw_cntrs_ich8lan(hw);

	return ret_val;
}
/**
 *  e1000_initialize_hw_bits_ich8lan - Initialize required hardware bits
 *  @hw: pointer to the HW structure
 *
 *  Sets/Clears required hardware bits necessary for correctly setting up the
 *  hardware for transmit and receive.
 **/
static void e1000_initialize_hw_bits_ich8lan(struct e1000_hw *hw)
{
	u32 reg;

	DEBUGFUNC("e1000_initialize_hw_bits_ich8lan");

	if (hw->mac.disable_hw_init_bits)
		goto out;

	/* Extended Device Control */
	reg = E1000_READ_REG(hw, E1000_CTRL_EXT);
	reg |= (1 << 22);
	E1000_WRITE_REG(hw, E1000_CTRL_EXT, reg);

	/* Transmit Descriptor Control 0 */
	reg = E1000_READ_REG(hw, E1000_TXDCTL(0));
	reg |= (1 << 22);
	E1000_WRITE_REG(hw, E1000_TXDCTL(0), reg);

	/* Transmit Descriptor Control 1 */
	reg = E1000_READ_REG(hw, E1000_TXDCTL(1));
	reg |= (1 << 22);
	E1000_WRITE_REG(hw, E1000_TXDCTL(1), reg);

	/* Transmit Arbitration Control 0 */
	reg = E1000_READ_REG(hw, E1000_TARC(0));
	if (hw->mac.type == e1000_ich8lan)
		reg |= (1 << 28) | (1 << 29);
	reg |= (1 << 23) | (1 << 24) | (1 << 26) | (1 << 27);
	E1000_WRITE_REG(hw, E1000_TARC(0), reg);

	/* Transmit Arbitration Control 1 */
	reg = E1000_READ_REG(hw, E1000_TARC(1));
	if (E1000_READ_REG(hw, E1000_TCTL) & E1000_TCTL_MULR)
		reg &= ~(1 << 28);
	else
		reg |= (1 << 28);
	reg |= (1 << 24) | (1 << 26) | (1 << 30);
	E1000_WRITE_REG(hw, E1000_TARC(1), reg);

	/* Device Status */
	if (hw->mac.type == e1000_ich8lan) {
		reg = E1000_READ_REG(hw, E1000_STATUS);
		reg &= ~(1 << 31);
		E1000_WRITE_REG(hw, E1000_STATUS, reg);
	}

out:
	return;
}

/**
 *  e1000_setup_link_ich8lan - Setup flow control and link settings
 *  @hw: pointer to the HW structure
 *
 *  Determines which flow control settings to use, then configures flow
 *  control.  Calls the appropriate media-specific link configuration
 *  function.  Assuming the adapter has a valid link partner, a valid link
 *  should be established.  Assumes the hardware has previously been reset
 *  and the transmitter and receiver are not enabled.
 **/
static s32 e1000_setup_link_ich8lan(struct e1000_hw *hw)
{
	struct e1000_functions *func = &hw->func;
	s32 ret_val = E1000_SUCCESS;

	DEBUGFUNC("e1000_setup_link_ich8lan");

	if (e1000_check_reset_block(hw))
		goto out;

	/*
	 * ICH parts do not have a word in the NVM to determine
	 * the default flow control setting, so we explicitly
	 * set it to full.
	 */
	if (hw->fc.type == e1000_fc_default)
		hw->fc.type = e1000_fc_full;

	hw->fc.original_type = hw->fc.type;

	DEBUGOUT1("After fix-ups FlowControl is now = %x\n", hw->fc.type);

	/* Continue to configure the copper link. */
	ret_val = func->setup_physical_interface(hw);
	if (ret_val)
		goto out;

	E1000_WRITE_REG(hw, E1000_FCTTV, hw->fc.pause_time);

	ret_val = e1000_set_fc_watermarks_generic(hw);

out:
	return ret_val;
}

/**
 *  e1000_setup_copper_link_ich8lan - Configure MAC/PHY interface
 *  @hw: pointer to the HW structure
 *
 *  Configures the kumeran interface to the PHY to wait the appropriate time
 *  when polling the PHY, then call the generic setup_copper_link to finish
 *  configuring the copper link.
 **/
static s32 e1000_setup_copper_link_ich8lan(struct e1000_hw *hw)
{
	u32 ctrl;
	s32 ret_val;
	u16 reg_data;

	DEBUGFUNC("e1000_setup_copper_link_ich8lan");

	ctrl = E1000_READ_REG(hw, E1000_CTRL);
	ctrl |= E1000_CTRL_SLU;
	ctrl &= ~(E1000_CTRL_FRCSPD | E1000_CTRL_FRCDPX);
	E1000_WRITE_REG(hw, E1000_CTRL, ctrl);

	/*
	 * Set the mac to wait the maximum time between each iteration
	 * and increase the max iterations when polling the phy;
	 * this fixes erroneous timeouts at 10Mbps.
	 */
	ret_val = e1000_write_kmrn_reg(hw, GG82563_REG(0x34, 4), 0xFFFF);
	if (ret_val)
		goto out;
	ret_val = e1000_read_kmrn_reg(hw, GG82563_REG(0x34, 9), &reg_data);
	if (ret_val)
		goto out;
	reg_data |= 0x3F;
	ret_val = e1000_write_kmrn_reg(hw, GG82563_REG(0x34, 9), reg_data);
	if (ret_val)
		goto out;

	if (hw->phy.type == e1000_phy_igp_3) {
		ret_val = e1000_copper_link_setup_igp(hw);
		if (ret_val)
			goto out;
	}

	if (hw->phy.type == e1000_phy_ife) {
		ret_val = e1000_read_phy_reg(hw, IFE_PHY_MDIX_CONTROL, &reg_data);
		if (ret_val)
			goto out;

		reg_data &= ~IFE_PMC_AUTO_MDIX;

		switch (hw->phy.mdix) {
		case 1:
			reg_data &= ~IFE_PMC_FORCE_MDIX;
			break;
		case 2:
			reg_data |= IFE_PMC_FORCE_MDIX;
			break;
		case 0:
		default:
			reg_data |= IFE_PMC_AUTO_MDIX;
			break;
		}
		ret_val = e1000_write_phy_reg(hw, IFE_PHY_MDIX_CONTROL, reg_data);
		if (ret_val)
			goto out;
	}
	ret_val = e1000_setup_copper_link_generic(hw);

out:
	return ret_val;
}

/**
 *  e1000_get_link_up_info_ich8lan - Get current link speed and duplex
 *  @hw: pointer to the HW structure
 *  @speed: pointer to store current link speed
 *  @duplex: pointer to store the current link duplex
 *
 *  Calls the generic get_speed_and_duplex to retreive the current link
 *  information and then calls the Kumeran lock loss workaround for links at
 *  gigabit speeds.
 **/
static s32 e1000_get_link_up_info_ich8lan(struct e1000_hw *hw, u16 *speed,
                                          u16 *duplex)
{
	s32 ret_val;

	DEBUGFUNC("e1000_get_link_up_info_ich8lan");

	ret_val = e1000_get_speed_and_duplex_copper_generic(hw, speed, duplex);
	if (ret_val)
		goto out;

	if ((hw->mac.type == e1000_ich8lan) &&
	    (hw->phy.type == e1000_phy_igp_3) &&
	    (*speed == SPEED_1000)) {
		ret_val = e1000_kmrn_lock_loss_workaround_ich8lan(hw);
	}

out:
	return ret_val;
}

/**
 *  e1000_kmrn_lock_loss_workaround_ich8lan - Kumeran workaround
 *  @hw: pointer to the HW structure
 *
 *  Work-around for 82566 Kum