es2lan.c

grub源码分析文档

		e1000_release_phy_80003es2lan(hw);
		return ret_val;
	}

	/*
	 * The "ready" bit in the MDIC register may be incorrectly set
	 * before the device has completed the "Page Select" MDI
	 * transaction.  So we wait 200us after each MDI command...
	 */
	udelay(200);

	/* ...and verify the command was successful. */
	ret_val = e1000e_read_phy_reg_mdic(hw, page_select, &temp);

	if (((u16)offset >> GG82563_PAGE_SHIFT) != temp) {
		ret_val = -E1000_ERR_PHY;
		e1000_release_phy_80003es2lan(hw);
		return ret_val;
	}

	udelay(200);

	ret_val = e1000e_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
					   data);

	udelay(200);
	e1000_release_phy_80003es2lan(hw);

	return ret_val;
}

/**
 *  e1000_write_phy_reg_gg82563_80003es2lan - Write GG82563 PHY register
 *  @hw: pointer to the HW structure
 *  @offset: offset of the register to read
 *  @data: value to write to the register
 *
 *  Write to the GG82563 PHY register.  This is a function pointer entry
 *  point called by the api module.
 **/
static s32 e1000_write_phy_reg_gg82563_80003es2lan(struct e1000_hw *hw,
						   u32 offset, u16 data)
{
	s32 ret_val;
	u32 page_select;
	u16 temp;

	ret_val = e1000_acquire_phy_80003es2lan(hw);
	if (ret_val)
		return ret_val;

	/* Select Configuration Page */
	if ((offset & MAX_PHY_REG_ADDRESS) < GG82563_MIN_ALT_REG) {
		page_select = GG82563_PHY_PAGE_SELECT;
	} else {
		/*
		 * Use Alternative Page Select register to access
		 * registers 30 and 31
		 */
		page_select = GG82563_PHY_PAGE_SELECT_ALT;
	}

	temp = (u16)((u16)offset >> GG82563_PAGE_SHIFT);
	ret_val = e1000e_write_phy_reg_mdic(hw, page_select, temp);
	if (ret_val) {
		e1000_release_phy_80003es2lan(hw);
		return ret_val;
	}


	/*
	 * The "ready" bit in the MDIC register may be incorrectly set
	 * before the device has completed the "Page Select" MDI
	 * transaction.  So we wait 200us after each MDI command...
	 */
	udelay(200);

	/* ...and verify the command was successful. */
	ret_val = e1000e_read_phy_reg_mdic(hw, page_select, &temp);

	if (((u16)offset >> GG82563_PAGE_SHIFT) != temp) {
		e1000_release_phy_80003es2lan(hw);
		return -E1000_ERR_PHY;
	}

	udelay(200);

	ret_val = e1000e_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
					    data);

	udelay(200);
	e1000_release_phy_80003es2lan(hw);

	return ret_val;
}

/**
 *  e1000_write_nvm_80003es2lan - Write to ESB2 NVM
 *  @hw: pointer to the HW structure
 *  @offset: offset of the register to read
 *  @words: number of words to write
 *  @data: buffer of data to write to the NVM
 *
 *  Write "words" of data to the ESB2 NVM.  This is a function
 *  pointer entry point called by the api module.
 **/
static s32 e1000_write_nvm_80003es2lan(struct e1000_hw *hw, u16 offset,
				       u16 words, u16 *data)
{
	return e1000e_write_nvm_spi(hw, offset, words, data);
}

/**
 *  e1000_get_cfg_done_80003es2lan - Wait for configuration to complete
 *  @hw: pointer to the HW structure
 *
 *  Wait a specific amount of time for manageability processes to complete.
 *  This is a function pointer entry point called by the phy module.
 **/
static s32 e1000_get_cfg_done_80003es2lan(struct e1000_hw *hw)
{
	s32 timeout = PHY_CFG_TIMEOUT;
	u32 mask = E1000_NVM_CFG_DONE_PORT_0;

	if (hw->bus.func == 1)
		mask = E1000_NVM_CFG_DONE_PORT_1;

	while (timeout) {
		if (er32(EEMNGCTL) & mask)
			break;
		msleep(1);
		timeout--;
	}
	if (!timeout) {
		hw_dbg(hw, "MNG configuration cycle has not completed.\n");
		return -E1000_ERR_RESET;
	}

	return 0;
}

/**
 *  e1000_phy_force_speed_duplex_80003es2lan - Force PHY speed and duplex
 *  @hw: pointer to the HW structure
 *
 *  Force the speed and duplex settings onto the PHY.  This is a
 *  function pointer entry point called by the phy module.
 **/
static s32 e1000_phy_force_speed_duplex_80003es2lan(struct e1000_hw *hw)
{
	s32 ret_val;
	u16 phy_data;
	bool link;

	/*
	 * Clear Auto-Crossover to force MDI manually.  M88E1000 requires MDI
	 * forced whenever speed and duplex are forced.
	 */
	ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_CTRL, &phy_data);
	if (ret_val)
		return ret_val;

	phy_data &= ~GG82563_PSCR_CROSSOVER_MODE_AUTO;
	ret_val = e1e_wphy(hw, GG82563_PHY_SPEC_CTRL, phy_data);
	if (ret_val)
		return ret_val;

	hw_dbg(hw, "GG82563 PSCR: %X\n", phy_data);

	ret_val = e1e_rphy(hw, PHY_CONTROL, &phy_data);
	if (ret_val)
		return ret_val;

	e1000e_phy_force_speed_duplex_setup(hw, &phy_data);

	/* Reset the phy to commit changes. */
	phy_data |= MII_CR_RESET;

	ret_val = e1e_wphy(hw, PHY_CONTROL, phy_data);
	if (ret_val)
		return ret_val;

	udelay(1);

	if (hw->phy.autoneg_wait_to_complete) {
		hw_dbg(hw, "Waiting for forced speed/duplex link "
			 "on GG82563 phy.\n");

		ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT,
						     100000, &link);
		if (ret_val)
			return ret_val;

		if (!link) {
			/*
			 * We didn't get link.
			 * Reset the DSP and cross our fingers.
			 */
			ret_val = e1000e_phy_reset_dsp(hw);
			if (ret_val)
				return ret_val;
		}

		/* Try once more */
		ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT,
						     100000, &link);
		if (ret_val)
			return ret_val;
	}

	ret_val = e1e_rphy(hw, GG82563_PHY_MAC_SPEC_CTRL, &phy_data);
	if (ret_val)
		return ret_val;

	/*
	 * Resetting the phy means we need to verify the TX_CLK corresponds
	 * to the link speed.  10Mbps -> 2.5MHz, else 25MHz.
	 */
	phy_data &= ~GG82563_MSCR_TX_CLK_MASK;
	if (hw->mac.forced_speed_duplex & E1000_ALL_10_SPEED)
		phy_data |= GG82563_MSCR_TX_CLK_10MBPS_2_5;
	else
		phy_data |= GG82563_MSCR_TX_CLK_100MBPS_25;

	/*
	 * In addition, we must re-enable CRS on Tx for both half and full
	 * duplex.
	 */
	phy_data |= GG82563_MSCR_ASSERT_CRS_ON_TX;
	ret_val = e1e_wphy(hw, GG82563_PHY_MAC_SPEC_CTRL, phy_data);

	return ret_val;
}

/**
 *  e1000_get_cable_length_80003es2lan - Set approximate cable length
 *  @hw: pointer to the HW structure
 *
 *  Find the approximate cable length as measured by the GG82563 PHY.
 *  This is a function pointer entry point called by the phy module.
 **/
static s32 e1000_get_cable_length_80003es2lan(struct e1000_hw *hw)
{
	struct e1000_phy_info *phy = &hw->phy;
	s32 ret_val;
	u16 phy_data;
	u16 index;

	ret_val = e1e_rphy(hw, GG82563_PHY_DSP_DISTANCE, &phy_data);
	if (ret_val)
		return ret_val;

	index = phy_data & GG82563_DSPD_CABLE_LENGTH;
	phy->min_cable_length = e1000_gg82563_cable_length_table[index];
	phy->max_cable_length = e1000_gg82563_cable_length_table[index+5];

	phy->cable_length = (phy->min_cable_length + phy->max_cable_length) / 2;

	return 0;
}

/**
 *  e1000_get_link_up_info_80003es2lan - Report speed and duplex
 *  @hw: pointer to the HW structure
 *  @speed: pointer to speed buffer
 *  @duplex: pointer to duplex buffer
 *
 *  Retrieve the current speed and duplex configuration.
 *  This is a function pointer entry point called by the api module.
 **/
static s32 e1000_get_link_up_info_80003es2lan(struct e1000_hw *hw, u16 *speed,
					      u16 *duplex)
{
	s32 ret_val;

	if (hw->phy.media_type == e1000_media_type_copper) {
		ret_val = e1000e_get_speed_and_duplex_copper(hw,
								    speed,
								    duplex);
		if (ret_val)
			return ret_val;
		if (*speed == SPEED_1000)
			ret_val = e1000_cfg_kmrn_1000_80003es2lan(hw);
		else
			ret_val = e1000_cfg_kmrn_10_100_80003es2lan(hw,
							      *duplex);
	} else {
		ret_val = e1000e_get_speed_and_duplex_fiber_serdes(hw,
								  speed,
								  duplex);
	}

	return ret_val;
}

/**
 *  e1000_reset_hw_80003es2lan - Reset the ESB2 controller
 *  @hw: pointer to the HW structure
 *
 *  Perform a global reset to the ESB2 controller.
 *  This is a function pointer entry point called by the api module.
 **/
static s32 e1000_reset_hw_80003es2lan(struct e1000_hw *hw)
{
	u32 ctrl;
	u32 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 = e1000e_disable_pcie_master(hw);
	if (ret_val)
		hw_dbg(hw, "PCI-E Master disable polling has failed.\n");

	hw_dbg(hw, "Masking off all interrupts\n");
	ew32(IMC, 0xffffffff);

	ew32(RCTL, 0);
	ew32(TCTL, E1000_TCTL_PSP);
	e1e_flush();

	msleep(10);

	ctrl = er32(CTRL);

	hw_dbg(hw, "Issuing a global reset to MAC\n");
	ew32(CTRL, ctrl | E1000_CTRL_RST);

	ret_val = e1000e_get_auto_rd_done(hw);
	if (ret_val)
		/* We don't want to continue accessing MAC registers. */
		return ret_val;

	/* Clear any pending interrupt events. */
	ew32(IMC, 0xffffffff);
	icr = er32(ICR);

	return 0;
}

/**
 *  e1000_init_hw_80003es2lan - Initialize the ESB2 controller
 *  @hw: pointer to the HW structure
 *
 *  Initialize the hw bits, LED, VFTA, MTA, link and hw counters.
 *  This is a function pointer entry point called by the api module.
 **/
static s32 e1000_init_hw_80003es2lan(struct e1000_hw *hw)
{
	struct e1000_mac_info *mac = &hw->mac;
	u32 reg_data;
	s32 ret_val;
	u16 i;

	e1000_initialize_hw_bits_80003es2lan(hw);

	/* Initialize identification LED */
	ret_val = e1000e_id_led_init(hw);
	if (ret_val) {
		hw_dbg(hw, "Error initializing identification LED\n");
		/* This is not fatal and we should not stop init due to this */
	}

	/* Disabling VLAN filtering */
	hw_dbg(hw, "Initializing the IEEE VLAN\n");
	e1000e_clear_vfta(hw);

	/* Setup the receive address. */
	e1000e_init_rx_addrs(hw, mac->rar_entry_count);

	/* Zero out the Multicast HASH table */
	hw_dbg(hw, "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 = e1000e_setup_link(hw);

	/* Set the transmit descriptor write-back policy */
	reg_data = er32(TXDCTL(0));
	reg_data = (reg_data & ~E1000_TXDCTL_WTHRESH) |
		   E1000_TXDCTL_FULL_TX_DESC_WB | E1000_TXDCTL_COUNT_DESC;
	ew32(TXDCTL(0), reg_data);

	/* ...for both queues. */
	reg_data = er32(TXDCTL(1));
	reg_data = (reg_data & ~E1000_TXDCTL_WTHRESH) |
		   E1000_TXDCTL_FULL_TX_DESC_WB | E1000_TXDCTL_COUNT_DESC;
	ew32(TXDCTL(1), reg_data);

	/* Enable retransmit on late collisions */
	reg_data = er32(TCTL);
	reg_data |= E1000_TCTL_RTLC;
	ew32(TCTL, reg_data);

	/* Configure Gigabit Carry Extend Padding */
	reg_data = er32(TCTL_EXT);
	reg_data &= ~E1000_TCTL_EXT_GCEX_MASK;
	reg_data |= DEFAULT_TCTL_EXT_GCEX_80003ES2LAN;
	ew32(TCTL_EXT, reg_data);

	/* Configure Transmit Inter-Packet Gap */
	reg_data = er32(TIPG);
	reg_data &= ~E1000_TIPG_IPGT_MASK;
	reg_data |= DEFAULT_TIPG_IPGT_1000_80003ES2LAN;
	ew32(TIPG, reg_data);

	reg_data = E1000_READ_REG_ARRAY(hw, E1000_FFLT, 0x0001);
	reg_data &= ~0x00100000;
	E1000_WRITE_REG_ARRAY(hw, E1000_FFLT, 0x0001, reg_data);

	/*
	 * 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_80003es2lan(hw);

	return ret_val;
}

/**
 *  e1000_initialize_hw_bits_80003es2lan - Init hw bits of ESB2
 *  @hw: pointer to the HW structure
 *
 *  Initializes required hardware-dependent bits needed for normal operation.
 **/
static void e1000_initialize_hw_bits_80003es2lan(struct e1000_hw *hw)
{
	u32 reg;

	/* Transmit Descriptor Control 0 */
	reg = er32(TXDCTL(0));
	reg |= (1 << 22);
	ew32(TXDCTL(0), reg);