e1000_phy.c

Intel 82546系列lan driver源码

	/* Disable AHT in Slave mode on channel A */
	e1e_wphy(hw, 0x187A, 0x0800);
	/*
	 * Enable LPLU and disable AN to 1000 in non-D0a states,
	 * Enable SPD+B2B
	 */
	e1e_wphy(hw, 0x0019, 0x008D);
	/* Enable restart AN on an1000_dis change */
	e1e_wphy(hw, 0x001B, 0x2080);
	/* Enable wh_fifo read clock in 10/100 modes */
	e1e_wphy(hw, 0x0014, 0x0045);
	/* Restart AN, Speed selection is 1000 */
	e1e_wphy(hw, 0x0000, 0x1340);

	return E1000_SUCCESS;
}

/**
 *  e1000e_get_phy_type_from_id - Get PHY type from id
 *  @phy_id: phy_id read from the phy
 *
 *  Returns the phy type from the id.
 **/
enum e1000_phy_type e1000e_get_phy_type_from_id(u32 phy_id)
{
	enum e1000_phy_type phy_type = e1000_phy_unknown;

	switch (phy_id)	{
	case M88E1000_I_PHY_ID:
	case M88E1000_E_PHY_ID:
	case M88E1111_I_PHY_ID:
	case M88E1011_I_PHY_ID:
		phy_type = e1000_phy_m88;
		break;
	case IGP01E1000_I_PHY_ID: /* IGP 1 & 2 share this */
		phy_type = e1000_phy_igp_2;
		break;
	case GG82563_E_PHY_ID:
		phy_type = e1000_phy_gg82563;
		break;
	case IGP03E1000_E_PHY_ID:
		phy_type = e1000_phy_igp_3;
		break;
	case IFE_E_PHY_ID:
	case IFE_PLUS_E_PHY_ID:
	case IFE_C_E_PHY_ID:
		phy_type = e1000_phy_ife;
		break;
	case BME1000_E_PHY_ID:
	case BME1000_E_PHY_ID_R2:
		phy_type = e1000_phy_bm;
		break;
	default:
		phy_type = e1000_phy_unknown;
		break;
	}
	return phy_type;
}

/**
 *  e1000e_determine_phy_address - Determines PHY address.
 *  @hw: pointer to the HW structure
 *
 *  This uses a trial and error method to loop through possible PHY
 *  addresses. It tests each by reading the PHY ID registers and
 *  checking for a match.
 **/
s32 e1000e_determine_phy_address(struct e1000_hw *hw)
{
	s32 ret_val = -E1000_ERR_PHY_TYPE;
	u32 phy_addr = 0;
	u32 i;
	enum e1000_phy_type phy_type = e1000_phy_unknown;

	hw->phy.id = phy_type;

	for (phy_addr = 0; phy_addr < E1000_MAX_PHY_ADDR; phy_addr++) {
		hw->phy.addr = phy_addr;
		i = 0;

		do {
			e1000e_get_phy_id(hw);
			phy_type = e1000e_get_phy_type_from_id(hw->phy.id);

			/*
			 * If phy_type is valid, break - we found our
			 * PHY address
			 */
			if (phy_type  != e1000_phy_unknown) {
				ret_val = E1000_SUCCESS;
				goto out;
			}
			msleep(1);
			i++;
		} while (i < 10);
	}

out:
	return ret_val;
}

/**
 *  e1000_get_phy_addr_for_bm_page - Retrieve PHY page address
 *  @page: page to access
 *
 *  Returns the phy address for the page requested.
 **/
static u32 e1000_get_phy_addr_for_bm_page(u32 page, u32 reg)
{
	u32 phy_addr = 2;

	if ((page >= 768) || (page == 0 && reg == 25) || (reg == 31))
		phy_addr = 1;

	return phy_addr;
}

/**
 *  e1000e_write_phy_reg_bm - Write BM PHY register
 *  @hw: pointer to the HW structure
 *  @offset: register offset to write to
 *  @data: data to write at register offset
 *
 *  Acquires semaphore, if necessary, then writes the data to PHY register
 *  at the offset.  Release any acquired semaphores before exiting.
 **/
s32 e1000e_write_phy_reg_bm(struct e1000_hw *hw, u32 offset, u16 data)
{
	s32 ret_val;
	u32 page_select = 0;
	u32 page = offset >> IGP_PAGE_SHIFT;
	u32 page_shift = 0;

	/* Page 800 works differently than the rest so it has its own func */
	if (page == BM_WUC_PAGE) {
		ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, &data,
		                                         false);
		goto out;
	}

	ret_val = hw->phy.ops.acquire(hw);
	if (ret_val)
		goto out;

	hw->phy.addr = e1000_get_phy_addr_for_bm_page(page, offset);

	if (offset > MAX_PHY_MULTI_PAGE_REG) {
		/*
		 * Page select is register 31 for phy address 1 and 22 for
		 * phy address 2 and 3. Page select is shifted only for
		 * phy address 1.
		 */
		if (hw->phy.addr == 1) {
			page_shift = IGP_PAGE_SHIFT;
			page_select = IGP01E1000_PHY_PAGE_SELECT;
		} else {
			page_shift = 0;
			page_select = BM_PHY_PAGE_SELECT;
		}

		/* Page is shifted left, PHY expects (page x 32) */
		ret_val = e1000e_write_phy_reg_mdic(hw, page_select,
		                                   (page << page_shift));
		if (ret_val) {
			hw->phy.ops.release(hw);
			goto out;
		}
	}

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

	hw->phy.ops.release(hw);

out:
	return ret_val;
}

/**
 *  e1000e_read_phy_reg_bm - Read BM PHY register
 *  @hw: pointer to the HW structure
 *  @offset: register offset to be read
 *  @data: pointer to the read data
 *
 *  Acquires semaphore, if necessary, then reads the PHY register at offset
 *  and storing the retrieved information in data.  Release any acquired
 *  semaphores before exiting.
 **/
s32 e1000e_read_phy_reg_bm(struct e1000_hw *hw, u32 offset, u16 *data)
{
	s32 ret_val;
	u32 page_select = 0;
	u32 page = offset >> IGP_PAGE_SHIFT;
	u32 page_shift = 0;

	/* Page 800 works differently than the rest so it has its own func */
	if (page == BM_WUC_PAGE) {
		ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, data,
		                                         true);
		goto out;
	}

	ret_val = hw->phy.ops.acquire(hw);
	if (ret_val)
		goto out;

	hw->phy.addr = e1000_get_phy_addr_for_bm_page(page, offset);

	if (offset > MAX_PHY_MULTI_PAGE_REG) {
		/*
		 * Page select is register 31 for phy address 1 and 22 for
		 * phy address 2 and 3. Page select is shifted only for
		 * phy address 1.
		 */
		if (hw->phy.addr == 1) {
			page_shift = IGP_PAGE_SHIFT;
			page_select = IGP01E1000_PHY_PAGE_SELECT;
		} else {
			page_shift = 0;
			page_select = BM_PHY_PAGE_SELECT;
		}

		/* Page is shifted left, PHY expects (page x 32) */
		ret_val = e1000e_write_phy_reg_mdic(hw, page_select,
		                                   (page << page_shift));
		if (ret_val) {
			hw->phy.ops.release(hw);
			goto out;
		}
	}

	ret_val = e1000e_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
	                                  data);
	hw->phy.ops.release(hw);

out:
	return ret_val;
}

/**
 *  e1000e_read_phy_reg_bm2 - Read BM PHY register
 *  @hw: pointer to the HW structure
 *  @offset: register offset to be read
 *  @data: pointer to the read data
 *
 *  Acquires semaphore, if necessary, then reads the PHY register at offset
 *  and storing the retrieved information in data.  Release any acquired
 *  semaphores before exiting.
 **/
s32 e1000e_read_phy_reg_bm2(struct e1000_hw *hw, u32 offset, u16 *data)
{
	s32 ret_val;
	u16 page = (u16)(offset >> IGP_PAGE_SHIFT);

	/* Page 800 works differently than the rest so it has its own func */
	if (page == BM_WUC_PAGE) {
		ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, data,
		                                         true);
		goto out;
	}

	ret_val = hw->phy.ops.acquire(hw);
	if (ret_val)
		goto out;

	hw->phy.addr = 1;

	if (offset > MAX_PHY_MULTI_PAGE_REG) {

		/* Page is shifted left, PHY expects (page x 32) */
		ret_val = e1000e_write_phy_reg_mdic(hw, BM_PHY_PAGE_SELECT,
		                                   page);

		if (ret_val) {
			hw->phy.ops.release(hw);
			goto out;
		}
	}

	ret_val = e1000e_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
	                                  data);
	hw->phy.ops.release(hw);

out:
	return ret_val;
}

/**
 *  e1000e_write_phy_reg_bm2 - Write BM PHY register
 *  @hw: pointer to the HW structure
 *  @offset: register offset to write to
 *  @data: data to write at register offset
 *
 *  Acquires semaphore, if necessary, then writes the data to PHY register
 *  at the offset.  Release any acquired semaphores before exiting.
 **/
s32 e1000e_write_phy_reg_bm2(struct e1000_hw *hw, u32 offset, u16 data)
{
	s32 ret_val;
	u16 page = (u16)(offset >> IGP_PAGE_SHIFT);

	/* Page 800 works differently than the rest so it has its own func */
	if (page == BM_WUC_PAGE) {
		ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, &data,
		                                         false);
		goto out;
	}

	ret_val = hw->phy.ops.acquire(hw);
	if (ret_val)
		goto out;

	hw->phy.addr = 1;

	if (offset > MAX_PHY_MULTI_PAGE_REG) {
		/* Page is shifted left, PHY expects (page x 32) */
		ret_val = e1000e_write_phy_reg_mdic(hw, BM_PHY_PAGE_SELECT,
		                                   page);

		if (ret_val) {
			hw->phy.ops.release(hw);
			goto out;
		}
	}

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

	hw->phy.ops.release(hw);

out:
	return ret_val;
}

/**
 *  e1000_access_phy_wakeup_reg_bm - Read BM PHY wakeup register
 *  @hw: pointer to the HW structure
 *  @offset: register offset to be read or written
 *  @data: pointer to the data to read or write
 *  @read: determines if operation is read or write
 *
 *  Acquires semaphore, if necessary, then reads the PHY register at offset
 *  and storing the retrieved information in data.  Release any acquired
 *  semaphores before exiting. Note that procedure to read the wakeup
 *  registers are different. It works as such:
 *  1) Set page 769, register 17, bit 2 = 1
 *  2) Set page to 800 for host (801 if we were manageability)
 *  3) Write the address using the address opcode (0x11)
 *  4) Read or write the data using the data opcode (0x12)
 *  5) Restore 769_17.2 to its original value
 **/
static s32 e1000_access_phy_wakeup_reg_bm(struct e1000_hw *hw, u32 offset,
                                          u16 *data, bool read)
{
	s32 ret_val;
	u16 reg = ((u16)offset);
	u16 phy_reg = 0;
	u8  phy_acquired = 1;

	ret_val = hw->phy.ops.acquire(hw);
	if (ret_val) {
		e_dbg("Could not acquire PHY\n");
		phy_acquired = 0;
		goto out;
	}

	/* All operations in this function are phy address 1 */
	hw->phy.addr = 1;

	/* Set page 769 */
	e1000e_write_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT,
	                         (BM_WUC_ENABLE_PAGE << IGP_PAGE_SHIFT));

	ret_val = e1000e_read_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, &phy_reg);
	if (ret_val) {
		e_dbg("Could not read PHY page 769\n");
		goto out;
	}

	/* First clear bit 4 to avoid a power state change */
	phy_reg &= ~(BM_WUC_HOST_WU_BIT);
	ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, phy_reg);
	if (ret_val) {
		e_dbg("Could not clear PHY page 769 bit 4\n");
		goto out;
	}

	/* Write bit 2 = 1, and clear bit 4 to 769_17 */
	ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_ENABLE_REG,
	                                   phy_reg | BM_WUC_ENABLE_BIT);
	if (ret_val) {
		e_dbg("Could not write PHY page 769 bit 2\n");
		goto out;
	}

	/* Select page 800 */
	ret_val = e1000e_write_phy_reg_mdic(hw,
	                                   IGP01E1000_PHY_PAGE_SELECT,
	                                   (BM_WUC_PAGE << IGP_PAGE_SHIFT));

	/* Write the page 800 offset value using opcode 0x11 */
	ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_ADDRESS_OPCODE, reg);
	if (ret_val) {
		e_dbg("Could not write address opcode to page 800\n");
		goto out;
	}

	if (read) {
	        /* Read the page 800 value using opcode 0x12 */
		ret_val = e1000e_read_phy_reg_mdic(hw, BM_WUC_DATA_OPCODE,
							data);
	} else {
	        /* Read the page 800 value using opcode 0x12 */
		ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_DATA_OPCODE,
							*data);
	}

	if (ret_val) {
		e_dbg("Could not read data value from page 800\n");
		goto out;
	}

	/*
	 * Restore 769_17.2 to its original value
	 * Set page 769
	 */
	e1000e_write_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT,
	                         (BM_WUC_ENABLE_PAGE << IGP_PAGE_SHIFT));

	/* Clear 769_17.2 */
	ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, phy_reg);
	if (ret_val) {
		e_dbg("Could not clear PHY page 769 bit 2\n");
		goto out;
	}

out:
	if (phy_acquired == 1)
		hw->phy.ops.release(hw);
	return ret_val;
}

/**
 * e1000_power_up_phy_copper - Restore copper link in case of PHY power down
 * @hw: pointer to the HW structure
 *
 * In the case of a PHY power down to save power, or to turn off link during a
 * driver unload, or wake on lan is not enabled, restore the link to previous
 * settings.
 **/
void e1000_power_up_phy_copper(struct e1000_hw *hw)
{
	u16 mii_reg = 0;

	/* The PHY will retain its settings across a power down/up cycle */
	e1e_rphy(hw, PHY_CONTROL, &mii_reg);
	mii_reg &= ~MII_CR_POWER_DOWN;
	e1e_wphy(hw, PHY_CONTROL, mii_reg);
}

/**
 * e1000_power_down_phy_copper - Restore copper link in case of PHY power down
 * @hw: pointer to the HW structure
 *
 * In the case of a PHY power down to save power, or to turn off link during a
 * driver unload, or wake on lan is not enabled, restore the link to previous
 * settings.
 **/
void e1000_power_down_phy_copper(struct e1000_hw *hw)
{
	u16 mii_reg = 0;

	/* The PHY will retain its settings across a power down/up cycle */
	e1e_rphy(hw, PHY_CONTROL, &mii_reg);
	mii_reg |= MII_CR_POWER_DOWN;
	e1e_wphy(hw, PHY_CONTROL, mii_reg);
	msleep(1);
}