/** * e1000_set_phy_type - Set the phy type member in the hw struct. * @hw: Struct containing variables accessed by shared code
*/ static s32 e1000_set_phy_type(struct e1000_hw *hw)
{ if (hw->mac_type == e1000_undefined) return -E1000_ERR_PHY_TYPE;
switch (hw->phy_id) { case M88E1000_E_PHY_ID: case M88E1000_I_PHY_ID: case M88E1011_I_PHY_ID: case M88E1111_I_PHY_ID: case M88E1118_E_PHY_ID:
hw->phy_type = e1000_phy_m88; break; case IGP01E1000_I_PHY_ID: if (hw->mac_type == e1000_82541 ||
hw->mac_type == e1000_82541_rev_2 ||
hw->mac_type == e1000_82547 ||
hw->mac_type == e1000_82547_rev_2)
hw->phy_type = e1000_phy_igp; break; case RTL8211B_PHY_ID:
hw->phy_type = e1000_phy_8211; break; case RTL8201N_PHY_ID:
hw->phy_type = e1000_phy_8201; break; default: /* Should never have loaded on this device */
hw->phy_type = e1000_phy_undefined; return -E1000_ERR_PHY_TYPE;
}
/** * e1000_set_mac_type - Set the mac type member in the hw struct. * @hw: Struct containing variables accessed by shared code
*/
s32 e1000_set_mac_type(struct e1000_hw *hw)
{ switch (hw->device_id) { case E1000_DEV_ID_82542: switch (hw->revision_id) { case E1000_82542_2_0_REV_ID:
hw->mac_type = e1000_82542_rev2_0; break; case E1000_82542_2_1_REV_ID:
hw->mac_type = e1000_82542_rev2_1; break; default: /* Invalid 82542 revision ID */ return -E1000_ERR_MAC_TYPE;
} break; case E1000_DEV_ID_82543GC_FIBER: case E1000_DEV_ID_82543GC_COPPER:
hw->mac_type = e1000_82543; break; case E1000_DEV_ID_82544EI_COPPER: case E1000_DEV_ID_82544EI_FIBER: case E1000_DEV_ID_82544GC_COPPER: case E1000_DEV_ID_82544GC_LOM:
hw->mac_type = e1000_82544; break; case E1000_DEV_ID_82540EM: case E1000_DEV_ID_82540EM_LOM: case E1000_DEV_ID_82540EP: case E1000_DEV_ID_82540EP_LOM: case E1000_DEV_ID_82540EP_LP:
hw->mac_type = e1000_82540; break; case E1000_DEV_ID_82545EM_COPPER: case E1000_DEV_ID_82545EM_FIBER:
hw->mac_type = e1000_82545; break; case E1000_DEV_ID_82545GM_COPPER: case E1000_DEV_ID_82545GM_FIBER: case E1000_DEV_ID_82545GM_SERDES:
hw->mac_type = e1000_82545_rev_3; break; case E1000_DEV_ID_82546EB_COPPER: case E1000_DEV_ID_82546EB_FIBER: case E1000_DEV_ID_82546EB_QUAD_COPPER:
hw->mac_type = e1000_82546; break; case E1000_DEV_ID_82546GB_COPPER: case E1000_DEV_ID_82546GB_FIBER: case E1000_DEV_ID_82546GB_SERDES: case E1000_DEV_ID_82546GB_PCIE: case E1000_DEV_ID_82546GB_QUAD_COPPER: case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
hw->mac_type = e1000_82546_rev_3; break; case E1000_DEV_ID_82541EI: case E1000_DEV_ID_82541EI_MOBILE: case E1000_DEV_ID_82541ER_LOM:
hw->mac_type = e1000_82541; break; case E1000_DEV_ID_82541ER: case E1000_DEV_ID_82541GI: case E1000_DEV_ID_82541GI_LF: case E1000_DEV_ID_82541GI_MOBILE:
hw->mac_type = e1000_82541_rev_2; break; case E1000_DEV_ID_82547EI: case E1000_DEV_ID_82547EI_MOBILE:
hw->mac_type = e1000_82547; break; case E1000_DEV_ID_82547GI:
hw->mac_type = e1000_82547_rev_2; break; case E1000_DEV_ID_INTEL_CE4100_GBE:
hw->mac_type = e1000_ce4100; break; default: /* Should never have loaded on this device */ return -E1000_ERR_MAC_TYPE;
}
switch (hw->mac_type) { case e1000_82541: case e1000_82547: case e1000_82541_rev_2: case e1000_82547_rev_2:
hw->asf_firmware_present = true; break; default: break;
}
/* The 82543 chip does not count tx_carrier_errors properly in * FD mode
*/ if (hw->mac_type == e1000_82543)
hw->bad_tx_carr_stats_fd = true;
if (hw->mac_type > e1000_82544)
hw->has_smbus = true;
return E1000_SUCCESS;
}
/** * e1000_set_media_type - Set media type and TBI compatibility. * @hw: Struct containing variables accessed by shared code
*/ void e1000_set_media_type(struct e1000_hw *hw)
{
u32 status;
if (hw->mac_type != e1000_82543) { /* tbi_compatibility is only valid on 82543 */
hw->tbi_compatibility_en = false;
}
switch (hw->device_id) { case E1000_DEV_ID_82545GM_SERDES: case E1000_DEV_ID_82546GB_SERDES:
hw->media_type = e1000_media_type_internal_serdes; break; default: switch (hw->mac_type) { case e1000_82542_rev2_0: case e1000_82542_rev2_1:
hw->media_type = e1000_media_type_fiber; break; case e1000_ce4100:
hw->media_type = e1000_media_type_copper; break; default:
status = er32(STATUS); if (status & E1000_STATUS_TBIMODE) {
hw->media_type = e1000_media_type_fiber; /* tbi_compatibility not valid on fiber */
hw->tbi_compatibility_en = false;
} else {
hw->media_type = e1000_media_type_copper;
} break;
}
}
}
/** * e1000_reset_hw - reset the hardware completely * @hw: Struct containing variables accessed by shared code * * Reset the transmit and receive units; mask and clear all interrupts.
*/
s32 e1000_reset_hw(struct e1000_hw *hw)
{
u32 ctrl;
u32 ctrl_ext;
u32 manc;
u32 led_ctrl;
s32 ret_val;
/* For 82542 (rev 2.0), disable MWI before issuing a device reset */ if (hw->mac_type == e1000_82542_rev2_0) {
e_dbg("Disabling MWI on 82542 rev 2.0\n");
e1000_pci_clear_mwi(hw);
}
/* Clear interrupt mask to stop board from generating interrupts */
e_dbg("Masking off all interrupts\n");
ew32(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.
*/
ew32(RCTL, 0);
ew32(TCTL, E1000_TCTL_PSP);
E1000_WRITE_FLUSH();
/* The tbi_compatibility_on Flag must be cleared when Rctl is cleared. */
hw->tbi_compatibility_on = false;
/* Delay to allow any outstanding PCI transactions to complete before * resetting the device
*/
msleep(10);
ctrl = er32(CTRL);
/* Must reset the PHY before resetting the MAC */ if ((hw->mac_type == e1000_82541) || (hw->mac_type == e1000_82547)) {
ew32(CTRL, (ctrl | E1000_CTRL_PHY_RST));
E1000_WRITE_FLUSH();
msleep(5);
}
/* Issue a global reset to the MAC. This will reset the chip's * transmit, receive, DMA, and link units. It will not effect * the current PCI configuration. The global reset bit is self- * clearing, and should clear within a microsecond.
*/
e_dbg("Issuing a global reset to MAC\n");
switch (hw->mac_type) { case e1000_82544: case e1000_82540: case e1000_82545: case e1000_82546: case e1000_82541: case e1000_82541_rev_2: /* These controllers can't ack the 64-bit write when issuing the * reset, so use IO-mapping as a workaround to issue the reset
*/
E1000_WRITE_REG_IO(hw, CTRL, (ctrl | E1000_CTRL_RST)); break; case e1000_82545_rev_3: case e1000_82546_rev_3: /* Reset is performed on a shadow of the control register */
ew32(CTRL_DUP, (ctrl | E1000_CTRL_RST)); break; case e1000_ce4100: default:
ew32(CTRL, (ctrl | E1000_CTRL_RST)); break;
}
/* After MAC reset, force reload of EEPROM to restore power-on settings * to device. Later controllers reload the EEPROM automatically, so * just wait for reload to complete.
*/ switch (hw->mac_type) { case e1000_82542_rev2_0: case e1000_82542_rev2_1: case e1000_82543: case e1000_82544: /* Wait for reset to complete */
udelay(10);
ctrl_ext = er32(CTRL_EXT);
ctrl_ext |= E1000_CTRL_EXT_EE_RST;
ew32(CTRL_EXT, ctrl_ext);
E1000_WRITE_FLUSH(); /* Wait for EEPROM reload */
msleep(2); break; case e1000_82541: case e1000_82541_rev_2: case e1000_82547: case e1000_82547_rev_2: /* Wait for EEPROM reload */
msleep(20); break; default: /* Auto read done will delay 5ms or poll based on mac type */
ret_val = e1000_get_auto_rd_done(hw); if (ret_val) return ret_val; break;
}
/* Clear interrupt mask to stop board from generating interrupts */
e_dbg("Masking off all interrupts\n");
ew32(IMC, 0xffffffff);
/* Clear any pending interrupt events. */
er32(ICR);
/* If MWI was previously enabled, reenable it. */ if (hw->mac_type == e1000_82542_rev2_0) { if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
e1000_pci_set_mwi(hw);
}
return E1000_SUCCESS;
}
/** * e1000_init_hw - Performs basic configuration of the adapter. * @hw: Struct containing variables accessed by shared code * * Assumes that the controller has previously been reset and is in a * post-reset uninitialized state. Initializes the receive address registers, * multicast table, and VLAN filter table. Calls routines to setup link * configuration and flow control settings. Clears all on-chip counters. Leaves * the transmit and receive units disabled and uninitialized.
*/
s32 e1000_init_hw(struct e1000_hw *hw)
{
u32 ctrl;
u32 i;
s32 ret_val;
u32 mta_size;
u32 ctrl_ext;
/* Initialize Identification LED */
ret_val = e1000_id_led_init(hw); if (ret_val) {
e_dbg("Error Initializing Identification LED\n"); return ret_val;
}
/* Set the media type and TBI compatibility */
e1000_set_media_type(hw);
/* Disabling VLAN filtering. */
e_dbg("Initializing the IEEE VLAN\n"); if (hw->mac_type < e1000_82545_rev_3)
ew32(VET, 0);
e1000_clear_vfta(hw);
/* For 82542 (rev 2.0), disable MWI and put the receiver into reset */ if (hw->mac_type == e1000_82542_rev2_0) {
e_dbg("Disabling MWI on 82542 rev 2.0\n");
e1000_pci_clear_mwi(hw);
ew32(RCTL, E1000_RCTL_RST);
E1000_WRITE_FLUSH();
msleep(5);
}
/* Setup the receive address. This involves initializing all of the * Receive Address Registers (RARs 0 - 15).
*/
e1000_init_rx_addrs(hw);
/* For 82542 (rev 2.0), take the receiver out of reset and enable MWI */ if (hw->mac_type == e1000_82542_rev2_0) {
ew32(RCTL, 0);
E1000_WRITE_FLUSH();
msleep(1); if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
e1000_pci_set_mwi(hw);
}
/* Zero out the Multicast HASH table */
e_dbg("Zeroing the MTA\n");
mta_size = E1000_MC_TBL_SIZE; for (i = 0; i < mta_size; i++) {
E1000_WRITE_REG_ARRAY(hw, MTA, i, 0); /* use write flush to prevent Memory Write Block (MWB) from * occurring when accessing our register space
*/
E1000_WRITE_FLUSH();
}
/* Set the PCI priority bit correctly in the CTRL register. This * determines if the adapter gives priority to receives, or if it * gives equal priority to transmits and receives. Valid only on * 82542 and 82543 silicon.
*/ if (hw->dma_fairness && hw->mac_type <= e1000_82543) {
ctrl = er32(CTRL);
ew32(CTRL, ctrl | E1000_CTRL_PRIOR);
}
switch (hw->mac_type) { case e1000_82545_rev_3: case e1000_82546_rev_3: break; default: /* Workaround for PCI-X problem when BIOS sets MMRBC * incorrectly.
*/ if (hw->bus_type == e1000_bus_type_pcix &&
e1000_pcix_get_mmrbc(hw) > 2048)
e1000_pcix_set_mmrbc(hw, 2048); break;
}
/* Call a subroutine to configure the link and setup flow control. */
ret_val = e1000_setup_link(hw);
/* Set the transmit descriptor write-back policy */ if (hw->mac_type > e1000_82544) {
ctrl = er32(TXDCTL);
ctrl =
(ctrl & ~E1000_TXDCTL_WTHRESH) |
E1000_TXDCTL_FULL_TX_DESC_WB;
ew32(TXDCTL, ctrl);
}
/* 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(hw);
if (hw->device_id == E1000_DEV_ID_82546GB_QUAD_COPPER ||
hw->device_id == E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3) {
ctrl_ext = er32(CTRL_EXT); /* Relaxed ordering must be disabled to avoid a parity * error crash in a PCI slot.
*/
ctrl_ext |= E1000_CTRL_EXT_RO_DIS;
ew32(CTRL_EXT, ctrl_ext);
}
/** * e1000_setup_link - Configures flow control and link settings. * @hw: Struct containing variables accessed by shared code * * Determines which flow control settings to use. Calls the appropriate media- * specific link configuration function. Configures the flow control settings. * 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.
*/
s32 e1000_setup_link(struct e1000_hw *hw)
{
u32 ctrl_ext;
s32 ret_val;
u16 eeprom_data;
/* Read and store word 0x0F of the EEPROM. This word contains bits * that determine the hardware's default PAUSE (flow control) mode, * a bit that determines whether the HW defaults to enabling or * disabling auto-negotiation, and the direction of the * SW defined pins. If there is no SW over-ride of the flow * control setting, then the variable hw->fc will * be initialized based on a value in the EEPROM.
*/ if (hw->fc == E1000_FC_DEFAULT) {
ret_val = e1000_read_eeprom(hw, EEPROM_INIT_CONTROL2_REG,
1, &eeprom_data); if (ret_val) {
e_dbg("EEPROM Read Error\n"); return -E1000_ERR_EEPROM;
} if ((eeprom_data & EEPROM_WORD0F_PAUSE_MASK) == 0)
hw->fc = E1000_FC_NONE; elseif ((eeprom_data & EEPROM_WORD0F_PAUSE_MASK) ==
EEPROM_WORD0F_ASM_DIR)
hw->fc = E1000_FC_TX_PAUSE; else
hw->fc = E1000_FC_FULL;
}
/* We want to save off the original Flow Control configuration just * in case we get disconnected and then reconnected into a different * hub or switch with different Flow Control capabilities.
*/ if (hw->mac_type == e1000_82542_rev2_0)
hw->fc &= (~E1000_FC_TX_PAUSE);
e_dbg("After fix-ups FlowControl is now = %x\n", hw->fc);
/* Take the 4 bits from EEPROM word 0x0F that determine the initial * polarity value for the SW controlled pins, and setup the * Extended Device Control reg with that info. * This is needed because one of the SW controlled pins is used for * signal detection. So this should be done before e1000_setup_pcs_link() * or e1000_phy_setup() is called.
*/ if (hw->mac_type == e1000_82543) {
ret_val = e1000_read_eeprom(hw, EEPROM_INIT_CONTROL2_REG,
1, &eeprom_data); if (ret_val) {
e_dbg("EEPROM Read Error\n"); return -E1000_ERR_EEPROM;
}
ctrl_ext = ((eeprom_data & EEPROM_WORD0F_SWPDIO_EXT) <<
SWDPIO__EXT_SHIFT);
ew32(CTRL_EXT, ctrl_ext);
}
/* Call the necessary subroutine to configure the link. */
ret_val = (hw->media_type == e1000_media_type_copper) ?
e1000_setup_copper_link(hw) : e1000_setup_fiber_serdes_link(hw);
/* Initialize the flow control address, type, and PAUSE timer * registers to their default values. This is done even if flow * control is disabled, because it does not hurt anything to * initialize these registers.
*/
e_dbg("Initializing the Flow Control address, type and timer regs\n");
/* Set the flow control receive threshold registers. Normally, * these registers will be set to a default threshold that may be * adjusted later by the driver's runtime code. However, if the * ability to transmit pause frames in not enabled, then these * registers will be set to 0.
*/ if (!(hw->fc & E1000_FC_TX_PAUSE)) {
ew32(FCRTL, 0);
ew32(FCRTH, 0);
} else { /* We need to set up the Receive Threshold high and low water * marks as well as (optionally) enabling the transmission of * XON frames.
*/ if (hw->fc_send_xon) {
ew32(FCRTL, (hw->fc_low_water | E1000_FCRTL_XONE));
ew32(FCRTH, hw->fc_high_water);
} else {
ew32(FCRTL, hw->fc_low_water);
ew32(FCRTH, hw->fc_high_water);
}
} return ret_val;
}
/** * e1000_setup_fiber_serdes_link - prepare fiber or serdes link * @hw: Struct containing variables accessed by shared code * * Manipulates Physical Coding Sublayer functions in order to configure * link. Assumes the hardware has been previously reset and the transmitter * and receiver are not enabled.
*/ static s32 e1000_setup_fiber_serdes_link(struct e1000_hw *hw)
{
u32 ctrl;
u32 status;
u32 txcw = 0;
u32 i;
u32 signal = 0;
s32 ret_val;
/* On adapters with a MAC newer than 82544, SWDP 1 will be * set when the optics detect a signal. On older adapters, it will be * cleared when there is a signal. This applies to fiber media only. * If we're on serdes media, adjust the output amplitude to value * set in the EEPROM.
*/
ctrl = er32(CTRL); if (hw->media_type == e1000_media_type_fiber)
signal = (hw->mac_type > e1000_82544) ? E1000_CTRL_SWDPIN1 : 0;
ret_val = e1000_adjust_serdes_amplitude(hw); if (ret_val) return ret_val;
/* Take the link out of reset */
ctrl &= ~(E1000_CTRL_LRST);
/* Adjust VCO speed to improve BER performance */
ret_val = e1000_set_vco_speed(hw); if (ret_val) return ret_val;
e1000_config_collision_dist(hw);
/* Check for a software override of the flow control settings, and setup * the device accordingly. If auto-negotiation is enabled, then * software will have to set the "PAUSE" bits to the correct value in * the Tranmsit Config Word Register (TXCW) and re-start * auto-negotiation. However, if auto-negotiation is disabled, then * software will have to manually configure the two flow control enable * bits in the CTRL register. * * The possible values of the "fc" parameter are: * 0: Flow control is completely disabled * 1: Rx flow control is enabled (we can receive pause frames, but * not send pause frames). * 2: Tx flow control is enabled (we can send pause frames but we do * not support receiving pause frames). * 3: Both Rx and TX flow control (symmetric) are enabled.
*/ switch (hw->fc) { case E1000_FC_NONE: /* Flow ctrl is completely disabled by a software over-ride */
txcw = (E1000_TXCW_ANE | E1000_TXCW_FD); break; case E1000_FC_RX_PAUSE: /* Rx Flow control is enabled and Tx Flow control is disabled by * a software over-ride. Since there really isn't a way to * advertise that we are capable of Rx Pause ONLY, we will * advertise that we support both symmetric and asymmetric Rx * PAUSE. Later, we will disable the adapter's ability to send * PAUSE frames.
*/
txcw = (E1000_TXCW_ANE | E1000_TXCW_FD | E1000_TXCW_PAUSE_MASK); break; case E1000_FC_TX_PAUSE: /* Tx Flow control is enabled, and Rx Flow control is disabled, * by a software over-ride.
*/
txcw = (E1000_TXCW_ANE | E1000_TXCW_FD | E1000_TXCW_ASM_DIR); break; case E1000_FC_FULL: /* Flow control (both Rx and Tx) is enabled by a software * over-ride.
*/
txcw = (E1000_TXCW_ANE | E1000_TXCW_FD | E1000_TXCW_PAUSE_MASK); break; default:
e_dbg("Flow control param set incorrectly\n"); return -E1000_ERR_CONFIG;
}
/* Since auto-negotiation is enabled, take the link out of reset (the * link will be in reset, because we previously reset the chip). This * will restart auto-negotiation. If auto-negotiation is successful * then the link-up status bit will be set and the flow control enable * bits (RFCE and TFCE) will be set according to their negotiated value.
*/
e_dbg("Auto-negotiation enabled\n");
/* If we have a signal (the cable is plugged in) then poll for a * "Link-Up" indication in the Device Status Register. Time-out if a * link isn't seen in 500 milliseconds seconds (Auto-negotiation should * complete in less than 500 milliseconds even if the other end is doing * it in SW). For internal serdes, we just assume a signal is present, * then poll.
*/ if (hw->media_type == e1000_media_type_internal_serdes ||
(er32(CTRL) & E1000_CTRL_SWDPIN1) == signal) {
e_dbg("Looking for Link\n"); for (i = 0; i < (LINK_UP_TIMEOUT / 10); i++) {
msleep(10);
status = er32(STATUS); if (status & E1000_STATUS_LU) break;
} if (i == (LINK_UP_TIMEOUT / 10)) {
e_dbg("Never got a valid link from auto-neg!!!\n");
hw->autoneg_failed = 1; /* AutoNeg failed to achieve a link, so we'll call * e1000_check_for_link. This routine will force the * link up if we detect a signal. This will allow us to * communicate with non-autonegotiating link partners.
*/
ret_val = e1000_check_for_link(hw); if (ret_val) {
e_dbg("Error while checking for link\n"); return ret_val;
}
hw->autoneg_failed = 0;
} else {
hw->autoneg_failed = 0;
e_dbg("Valid Link Found\n");
}
} else {
e_dbg("No Signal Detected\n");
} return E1000_SUCCESS;
}
/** * e1000_copper_link_rtl_setup - Copper link setup for e1000_phy_rtl series. * @hw: Struct containing variables accessed by shared code * * Commits changes to PHY configuration by calling e1000_phy_reset().
*/ static s32 e1000_copper_link_rtl_setup(struct e1000_hw *hw)
{
s32 ret_val;
/* SW reset the PHY so all changes take effect */
ret_val = e1000_phy_reset(hw); if (ret_val) {
e_dbg("Error Resetting the PHY\n"); return ret_val;
}
if (ret_val) {
e_dbg("e1000_copper_link_rtl_setup failed!\n"); return ret_val;
} break; default:
e_dbg("Error Resetting the PHY\n"); return E1000_ERR_PHY_TYPE;
}
return E1000_SUCCESS;
}
/** * e1000_copper_link_preconfig - early configuration for copper * @hw: Struct containing variables accessed by shared code * * Make sure we have a valid PHY and change PHY mode before link setup.
*/ static s32 e1000_copper_link_preconfig(struct e1000_hw *hw)
{
u32 ctrl;
s32 ret_val;
u16 phy_data;
ctrl = er32(CTRL); /* With 82543, we need to force speed and duplex on the MAC equal to * what the PHY speed and duplex configuration is. In addition, we need * to perform a hardware reset on the PHY to take it out of reset.
*/ if (hw->mac_type > e1000_82543) {
ctrl |= E1000_CTRL_SLU;
ctrl &= ~(E1000_CTRL_FRCSPD | E1000_CTRL_FRCDPX);
ew32(CTRL, ctrl);
} else {
ctrl |=
(E1000_CTRL_FRCSPD | E1000_CTRL_FRCDPX | E1000_CTRL_SLU);
ew32(CTRL, ctrl);
ret_val = e1000_phy_hw_reset(hw); if (ret_val) return ret_val;
}
/* Make sure we have a valid PHY */
ret_val = e1000_detect_gig_phy(hw); if (ret_val) {
e_dbg("Error, did not detect valid phy.\n"); return ret_val;
}
e_dbg("Phy ID = %x\n", hw->phy_id);
/* Set PHY to class A mode (if necessary) */
ret_val = e1000_set_phy_mode(hw); if (ret_val) return ret_val;
switch (hw->mdix) { case 1:
phy_data &= ~IGP01E1000_PSCR_FORCE_MDI_MDIX; break; case 2:
phy_data |= IGP01E1000_PSCR_FORCE_MDI_MDIX; break; case 0: default:
phy_data |= IGP01E1000_PSCR_AUTO_MDIX; break;
}
}
ret_val = e1000_write_phy_reg(hw, IGP01E1000_PHY_PORT_CTRL, phy_data); if (ret_val) return ret_val;
/* set auto-master slave resolution settings */ if (hw->autoneg) {
e1000_ms_type phy_ms_setting = hw->master_slave;
if (hw->ffe_config_state == e1000_ffe_config_active)
hw->ffe_config_state = e1000_ffe_config_enabled;
if (hw->dsp_config_state == e1000_dsp_config_activated)
hw->dsp_config_state = e1000_dsp_config_enabled;
/* when autonegotiation advertisement is only 1000Mbps then we * should disable SmartSpeed and enable Auto MasterSlave * resolution as hardware default.
*/ if (hw->autoneg_advertised == ADVERTISE_1000_FULL) { /* Disable SmartSpeed */
ret_val =
e1000_read_phy_reg(hw, IGP01E1000_PHY_PORT_CONFIG,
&phy_data); if (ret_val) return ret_val;
phy_data &= ~IGP01E1000_PSCFR_SMART_SPEED;
ret_val =
e1000_write_phy_reg(hw, IGP01E1000_PHY_PORT_CONFIG,
phy_data); if (ret_val) return ret_val; /* Set auto Master/Slave resolution process */
ret_val =
e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_data); if (ret_val) return ret_val;
phy_data &= ~CR_1000T_MS_ENABLE;
ret_val =
e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_data); if (ret_val) return ret_val;
}
ret_val = e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_data); if (ret_val) return ret_val;
switch (phy_ms_setting) { case e1000_ms_force_master:
phy_data |= (CR_1000T_MS_ENABLE | CR_1000T_MS_VALUE); break; case e1000_ms_force_slave:
phy_data |= CR_1000T_MS_ENABLE;
phy_data &= ~(CR_1000T_MS_VALUE); break; case e1000_ms_auto:
phy_data &= ~CR_1000T_MS_ENABLE; break; default: break;
}
ret_val = e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_data); if (ret_val) return ret_val;
}
return E1000_SUCCESS;
}
/** * e1000_copper_link_mgp_setup - Copper link setup for e1000_phy_m88 series. * @hw: Struct containing variables accessed by shared code
*/ static s32 e1000_copper_link_mgp_setup(struct e1000_hw *hw)
{
s32 ret_val;
u16 phy_data;
if (hw->phy_reset_disable) return E1000_SUCCESS;
/* Enable CRS on TX. This must be set for half-duplex operation. */
ret_val = e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_CTRL, &phy_data); if (ret_val) return ret_val;
phy_data |= M88E1000_PSCR_ASSERT_CRS_ON_TX;
/* Options: * MDI/MDI-X = 0 (default) * 0 - Auto for all speeds * 1 - MDI mode * 2 - MDI-X mode * 3 - Auto for 1000Base-T only (MDI-X for 10/100Base-T modes)
*/
phy_data &= ~M88E1000_PSCR_AUTO_X_MODE;
switch (hw->mdix) { case 1:
phy_data |= M88E1000_PSCR_MDI_MANUAL_MODE; break; case 2:
phy_data |= M88E1000_PSCR_MDIX_MANUAL_MODE; break; case 3:
phy_data |= M88E1000_PSCR_AUTO_X_1000T; break; case 0: default:
phy_data |= M88E1000_PSCR_AUTO_X_MODE; break;
}
if (hw->phy_revision < M88E1011_I_REV_4) { /* Force TX_CLK in the Extended PHY Specific Control Register * to 25MHz clock.
*/
ret_val =
e1000_read_phy_reg(hw, M88E1000_EXT_PHY_SPEC_CTRL,
&phy_data); if (ret_val) return ret_val;
phy_data |= M88E1000_EPSCR_TX_CLK_25;
if ((hw->phy_revision == E1000_REVISION_2) &&
(hw->phy_id == M88E1111_I_PHY_ID)) { /* Vidalia Phy, set the downshift counter to 5x */
phy_data &= ~(M88EC018_EPSCR_DOWNSHIFT_COUNTER_MASK);
phy_data |= M88EC018_EPSCR_DOWNSHIFT_COUNTER_5X;
ret_val = e1000_write_phy_reg(hw,
M88E1000_EXT_PHY_SPEC_CTRL,
phy_data); if (ret_val) return ret_val;
} else { /* Configure Master and Slave downshift values */
phy_data &= ~(M88E1000_EPSCR_MASTER_DOWNSHIFT_MASK |
M88E1000_EPSCR_SLAVE_DOWNSHIFT_MASK);
phy_data |= (M88E1000_EPSCR_MASTER_DOWNSHIFT_1X |
M88E1000_EPSCR_SLAVE_DOWNSHIFT_1X);
ret_val = e1000_write_phy_reg(hw,
M88E1000_EXT_PHY_SPEC_CTRL,
phy_data); if (ret_val) return ret_val;
}
}
/* SW Reset the PHY so all changes take effect */
ret_val = e1000_phy_reset(hw); if (ret_val) {
e_dbg("Error Resetting the PHY\n"); return ret_val;
}
return E1000_SUCCESS;
}
/** * e1000_copper_link_autoneg - setup auto-neg * @hw: Struct containing variables accessed by shared code * * Setup auto-negotiation and flow control advertisements, * and then perform auto-negotiation.
*/ static s32 e1000_copper_link_autoneg(struct e1000_hw *hw)
{
s32 ret_val;
u16 phy_data;
/* Perform some bounds checking on the hw->autoneg_advertised * parameter. If this variable is zero, then set it to the default.
*/
hw->autoneg_advertised &= AUTONEG_ADVERTISE_SPEED_DEFAULT;
/* If autoneg_advertised is zero, we assume it was not defaulted * by the calling code so we set to advertise full capability.
*/ if (hw->autoneg_advertised == 0)
hw->autoneg_advertised = AUTONEG_ADVERTISE_SPEED_DEFAULT;
/* IFE/RTL8201N PHY only supports 10/100 */ if (hw->phy_type == e1000_phy_8201)
hw->autoneg_advertised &= AUTONEG_ADVERTISE_10_100_ALL;
e_dbg("Reconfiguring auto-neg advertisement params\n");
ret_val = e1000_phy_setup_autoneg(hw); if (ret_val) {
e_dbg("Error Setting up Auto-Negotiation\n"); return ret_val;
}
e_dbg("Restarting Auto-Neg\n");
/* Restart auto-negotiation by setting the Auto Neg Enable bit and * the Auto Neg Restart bit in the PHY control register.
*/
ret_val = e1000_read_phy_reg(hw, PHY_CTRL, &phy_data); if (ret_val) return ret_val;
/* Does the user want to wait for Auto-Neg to complete here, or * check at a later time (for example, callback routine).
*/ if (hw->wait_autoneg_complete) {
ret_val = e1000_wait_autoneg(hw); if (ret_val) {
e_dbg
("Error while waiting for autoneg to complete\n"); return ret_val;
}
}
hw->get_link_status = true;
return E1000_SUCCESS;
}
/** * e1000_copper_link_postconfig - post link setup * @hw: Struct containing variables accessed by shared code * * Config the MAC and the PHY after link is up. * 1) Set up the MAC to the current PHY speed/duplex * if we are on 82543. If we * are on newer silicon, we only need to configure * collision distance in the Transmit Control Register. * 2) Set up flow control on the MAC to that established with * the link partner. * 3) Config DSP to improve Gigabit link quality for some PHY revisions.
*/ static s32 e1000_copper_link_postconfig(struct e1000_hw *hw)
{
s32 ret_val;
if ((hw->mac_type >= e1000_82544) && (hw->mac_type != e1000_ce4100)) {
e1000_config_collision_dist(hw);
} else {
ret_val = e1000_config_mac_to_phy(hw); if (ret_val) {
e_dbg("Error configuring MAC to PHY settings\n"); return ret_val;
}
}
ret_val = e1000_config_fc_after_link_up(hw); if (ret_val) {
e_dbg("Error Configuring Flow Control\n"); return ret_val;
}
/* Config DSP to improve Giga link quality */ if (hw->phy_type == e1000_phy_igp) {
ret_val = e1000_config_dsp_after_link_change(hw, true); if (ret_val) {
e_dbg("Error Configuring DSP after link up\n"); return ret_val;
}
}
return E1000_SUCCESS;
}
/** * e1000_setup_copper_link - phy/speed/duplex setting * @hw: Struct containing variables accessed by shared code * * Detects which PHY is present and sets up the speed and duplex
*/ static s32 e1000_setup_copper_link(struct e1000_hw *hw)
{
s32 ret_val;
u16 i;
u16 phy_data;
/* Check if it is a valid PHY and set PHY mode if necessary. */
ret_val = e1000_copper_link_preconfig(hw); if (ret_val) return ret_val;
if (hw->phy_type == e1000_phy_igp) {
ret_val = e1000_copper_link_igp_setup(hw); if (ret_val) return ret_val;
} elseif (hw->phy_type == e1000_phy_m88) {
ret_val = e1000_copper_link_mgp_setup(hw); if (ret_val) return ret_val;
} else {
ret_val = gbe_dhg_phy_setup(hw); if (ret_val) {
e_dbg("gbe_dhg_phy_setup failed!\n"); return ret_val;
}
}
if (hw->autoneg) { /* Setup autoneg and flow control advertisement * and perform autonegotiation
*/
ret_val = e1000_copper_link_autoneg(hw); if (ret_val) return ret_val;
} else { /* PHY will be set to 10H, 10F, 100H,or 100F * depending on value from forced_speed_duplex.
*/
e_dbg("Forcing speed and duplex\n");
ret_val = e1000_phy_force_speed_duplex(hw); if (ret_val) {
e_dbg("Error Forcing Speed and Duplex\n"); return ret_val;
}
}
/* Check link status. Wait up to 100 microseconds for link to become * valid.
*/ for (i = 0; i < 10; i++) {
ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &phy_data); if (ret_val) return ret_val;
ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &phy_data); if (ret_val) return ret_val;
if (phy_data & MII_SR_LINK_STATUS) { /* Config the MAC and PHY after link is up */
ret_val = e1000_copper_link_postconfig(hw); if (ret_val) return ret_val;
e_dbg("Valid link established!!!\n"); return E1000_SUCCESS;
}
udelay(10);
}
e_dbg("Unable to establish link!!!\n"); return E1000_SUCCESS;
}
/* Read the MII Auto-Neg Advertisement Register (Address 4). */
ret_val = e1000_read_phy_reg(hw, PHY_AUTONEG_ADV, &mii_autoneg_adv_reg); if (ret_val) return ret_val;
/* Read the MII 1000Base-T Control Register (Address 9). */
ret_val = e1000_read_phy_reg(hw, PHY_1000T_CTRL, &mii_1000t_ctrl_reg); if (ret_val) return ret_val; elseif (hw->phy_type == e1000_phy_8201)
mii_1000t_ctrl_reg &= ~REG9_SPEED_MASK;
/* Need to parse both autoneg_advertised and fc and set up * the appropriate PHY registers. First we will parse for * autoneg_advertised software override. Since we can advertise * a plethora of combinations, we need to check each bit * individually.
*/
/* First we clear all the 10/100 mb speed bits in the Auto-Neg * Advertisement Register (Address 4) and the 1000 mb speed bits in * the 1000Base-T Control Register (Address 9).
*/
mii_autoneg_adv_reg &= ~REG4_SPEED_MASK;
mii_1000t_ctrl_reg &= ~REG9_SPEED_MASK;
/* Do we want to advertise 10 Mb Half Duplex? */ if (hw->autoneg_advertised & ADVERTISE_10_HALF) {
e_dbg("Advertise 10mb Half duplex\n");
mii_autoneg_adv_reg |= NWAY_AR_10T_HD_CAPS;
}
/* Do we want to advertise 10 Mb Full Duplex? */ if (hw->autoneg_advertised & ADVERTISE_10_FULL) {
e_dbg("Advertise 10mb Full duplex\n");
mii_autoneg_adv_reg |= NWAY_AR_10T_FD_CAPS;
}
/* Do we want to advertise 100 Mb Half Duplex? */ if (hw->autoneg_advertised & ADVERTISE_100_HALF) {
e_dbg("Advertise 100mb Half duplex\n");
mii_autoneg_adv_reg |= NWAY_AR_100TX_HD_CAPS;
}
/* Do we want to advertise 100 Mb Full Duplex? */ if (hw->autoneg_advertised & ADVERTISE_100_FULL) {
e_dbg("Advertise 100mb Full duplex\n");
mii_autoneg_adv_reg |= NWAY_AR_100TX_FD_CAPS;
}
/* We do not allow the Phy to advertise 1000 Mb Half Duplex */ if (hw->autoneg_advertised & ADVERTISE_1000_HALF) {
e_dbg
("Advertise 1000mb Half duplex requested, request denied!\n");
}
/* Do we want to advertise 1000 Mb Full Duplex? */ if (hw->autoneg_advertised & ADVERTISE_1000_FULL) {
e_dbg("Advertise 1000mb Full duplex\n");
mii_1000t_ctrl_reg |= CR_1000T_FD_CAPS;
}
/* Check for a software override of the flow control settings, and * setup the PHY advertisement registers accordingly. If * auto-negotiation is enabled, then software will have to set the * "PAUSE" bits to the correct value in the Auto-Negotiation * Advertisement Register (PHY_AUTONEG_ADV) and re-start * auto-negotiation. * * The possible values of the "fc" parameter are: * 0: Flow control is completely disabled * 1: Rx flow control is enabled (we can receive pause frames * but not send pause frames). * 2: Tx flow control is enabled (we can send pause frames * but we do not support receiving pause frames). * 3: Both Rx and TX flow control (symmetric) are enabled. * other: No software override. The flow control configuration * in the EEPROM is used.
*/ switch (hw->fc) { case E1000_FC_NONE: /* 0 */ /* Flow control (RX & TX) is completely disabled by a * software over-ride.
*/
mii_autoneg_adv_reg &= ~(NWAY_AR_ASM_DIR | NWAY_AR_PAUSE); break; case E1000_FC_RX_PAUSE: /* 1 */ /* RX Flow control is enabled, and TX Flow control is * disabled, by a software over-ride.
*/ /* Since there really isn't a way to advertise that we are * capable of RX Pause ONLY, we will advertise that we * support both symmetric and asymmetric RX PAUSE. Later * (in e1000_config_fc_after_link_up) we will disable the * hw's ability to send PAUSE frames.
*/
mii_autoneg_adv_reg |= (NWAY_AR_ASM_DIR | NWAY_AR_PAUSE); break; case E1000_FC_TX_PAUSE: /* 2 */ /* TX Flow control is enabled, and RX Flow control is * disabled, by a software over-ride.
*/
mii_autoneg_adv_reg |= NWAY_AR_ASM_DIR;
mii_autoneg_adv_reg &= ~NWAY_AR_PAUSE; break; case E1000_FC_FULL: /* 3 */ /* Flow control (both RX and TX) is enabled by a software * over-ride.
*/
mii_autoneg_adv_reg |= (NWAY_AR_ASM_DIR | NWAY_AR_PAUSE); break; default:
e_dbg("Flow control param set incorrectly\n"); return -E1000_ERR_CONFIG;
}
ret_val = e1000_write_phy_reg(hw, PHY_AUTONEG_ADV, mii_autoneg_adv_reg); if (ret_val) return ret_val;
/** * e1000_phy_force_speed_duplex - force link settings * @hw: Struct containing variables accessed by shared code * * Force PHY speed and duplex settings to hw->forced_speed_duplex
*/ static s32 e1000_phy_force_speed_duplex(struct e1000_hw *hw)
{
u32 ctrl;
s32 ret_val;
u16 mii_ctrl_reg;
u16 mii_status_reg;
u16 phy_data;
u16 i;
/* Turn off Flow control if we are forcing speed and duplex. */
hw->fc = E1000_FC_NONE;
e_dbg("hw->fc = %d\n", hw->fc);
/* Read the Device Control Register. */
ctrl = er32(CTRL);
/* Set the bits to Force Speed and Duplex in the Device Ctrl Reg. */
ctrl |= (E1000_CTRL_FRCSPD | E1000_CTRL_FRCDPX);
ctrl &= ~(DEVICE_SPEED_MASK);
/* Clear the Auto Speed Detect Enable bit. */
ctrl &= ~E1000_CTRL_ASDE;
/* Read the MII Control Register. */
ret_val = e1000_read_phy_reg(hw, PHY_CTRL, &mii_ctrl_reg); if (ret_val) return ret_val;
/* We need to disable autoneg in order to force link and duplex. */
mii_ctrl_reg &= ~MII_CR_AUTO_NEG_EN;
/* Are we forcing Full or Half Duplex? */ if (hw->forced_speed_duplex == e1000_100_full ||
hw->forced_speed_duplex == e1000_10_full) { /* We want to force full duplex so we SET the full duplex bits * in the Device and MII Control Registers.
*/
ctrl |= E1000_CTRL_FD;
mii_ctrl_reg |= MII_CR_FULL_DUPLEX;
e_dbg("Full Duplex\n");
} else { /* We want to force half duplex so we CLEAR the full duplex bits * in the Device and MII Control Registers.
*/
ctrl &= ~E1000_CTRL_FD;
mii_ctrl_reg &= ~MII_CR_FULL_DUPLEX;
e_dbg("Half Duplex\n");
}
/* Are we forcing 100Mbps??? */ if (hw->forced_speed_duplex == e1000_100_full ||
hw->forced_speed_duplex == e1000_100_half) { /* Set the 100Mb bit and turn off the 1000Mb and 10Mb bits. */
ctrl |= E1000_CTRL_SPD_100;
mii_ctrl_reg |= MII_CR_SPEED_100;
mii_ctrl_reg &= ~(MII_CR_SPEED_1000 | MII_CR_SPEED_10);
e_dbg("Forcing 100mb ");
} else { /* Set the 10Mb bit and turn off the 1000Mb and 100Mb bits. */
ctrl &= ~(E1000_CTRL_SPD_1000 | E1000_CTRL_SPD_100);
mii_ctrl_reg |= MII_CR_SPEED_10;
mii_ctrl_reg &= ~(MII_CR_SPEED_1000 | MII_CR_SPEED_100);
e_dbg("Forcing 10mb ");
}
e1000_config_collision_dist(hw);
/* Write the configured values back to the Device Control Reg. */
ew32(CTRL, ctrl);
if (hw->phy_type == e1000_phy_m88) {
ret_val =
e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_CTRL, &phy_data); if (ret_val) return ret_val;
/* Clear Auto-Crossover to force MDI manually. M88E1000 requires * MDI forced whenever speed are duplex are forced.
*/
phy_data &= ~M88E1000_PSCR_AUTO_X_MODE;
ret_val =
e1000_write_phy_reg(hw, M88E1000_PHY_SPEC_CTRL, phy_data); if (ret_val) return ret_val;
e_dbg("M88E1000 PSCR: %x\n", phy_data);
/* Need to reset the PHY or these changes will be ignored */
mii_ctrl_reg |= MII_CR_RESET;
/* Disable MDI-X support for 10/100 */
} else { /* Clear Auto-Crossover to force MDI manually. IGP requires MDI * forced whenever speed or duplex are forced.
*/
ret_val =
e1000_read_phy_reg(hw, IGP01E1000_PHY_PORT_CTRL, &phy_data); if (ret_val) return ret_val;
ret_val =
e1000_write_phy_reg(hw, IGP01E1000_PHY_PORT_CTRL, phy_data); if (ret_val) return ret_val;
}
/* Write back the modified PHY MII control register. */
ret_val = e1000_write_phy_reg(hw, PHY_CTRL, mii_ctrl_reg); if (ret_val) return ret_val;
udelay(1);
/* The wait_autoneg_complete flag may be a little misleading here. * Since we are forcing speed and duplex, Auto-Neg is not enabled. * But we do want to delay for a period while forcing only so we * don't generate false No Link messages. So we will wait here * only if the user has set wait_autoneg_complete to 1, which is * the default.
*/ if (hw->wait_autoneg_complete) { /* We will wait for autoneg to complete. */
e_dbg("Waiting for forced speed/duplex link.\n");
mii_status_reg = 0;
/* Wait for autoneg to complete or 4.5 seconds to expire */ for (i = PHY_FORCE_TIME; i > 0; i--) { /* Read the MII Status Register and wait for Auto-Neg * Complete bit to be set.
*/
ret_val =
e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg); if (ret_val) return ret_val;
ret_val =
e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg); if (ret_val) return ret_val;
if (mii_status_reg & MII_SR_LINK_STATUS) break;
msleep(100);
} if ((i == 0) && (hw->phy_type == e1000_phy_m88)) { /* We didn't get link. Reset the DSP and wait again * for link.
*/
ret_val = e1000_phy_reset_dsp(hw); if (ret_val) {
e_dbg("Error Resetting PHY DSP\n"); return ret_val;
}
} /* This loop will early-out if the link condition has been * met
*/ for (i = PHY_FORCE_TIME; i > 0; i--) { if (mii_status_reg & MII_SR_LINK_STATUS) break;
msleep(100); /* Read the MII Status Register and wait for Auto-Neg * Complete bit to be set.
*/
ret_val =
e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg); if (ret_val) return ret_val;
if (hw->phy_type == e1000_phy_m88) { /* Because we reset the PHY above, we need to re-force TX_CLK in * the Extended PHY Specific Control Register to 25MHz clock. * This value defaults back to a 2.5MHz clock when the PHY is * reset.
*/
ret_val =
e1000_read_phy_reg(hw, M88E1000_EXT_PHY_SPEC_CTRL,
&phy_data); if (ret_val) return ret_val;
/* In addition, because of the s/w reset above, we need to * enable CRS on Tx. This must be set for both full and half * duplex operation.
*/
ret_val =
e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_CTRL, &phy_data); if (ret_val) return ret_val;
/** * e1000_config_collision_dist - set collision distance register * @hw: Struct containing variables accessed by shared code * * Sets the collision distance in the Transmit Control register. * Link should have been established previously. Reads the speed and duplex * information from the Device Status register.
*/ void e1000_config_collision_dist(struct e1000_hw *hw)
{
u32 tctl, coll_dist;
/** * e1000_config_mac_to_phy - sync phy and mac settings * @hw: Struct containing variables accessed by shared code * * Sets MAC speed and duplex settings to reflect the those in the PHY * The contents of the PHY register containing the needed information need to * be passed in.
*/ static s32 e1000_config_mac_to_phy(struct e1000_hw *hw)
{
u32 ctrl;
s32 ret_val;
u16 phy_data;
/* 82544 or newer MAC, Auto Speed Detection takes care of * MAC speed/duplex configuration.
*/ if ((hw->mac_type >= e1000_82544) && (hw->mac_type != e1000_ce4100)) return E1000_SUCCESS;
/* Read the Device Control Register and set the bits to Force Speed * and Duplex.
*/
ctrl = er32(CTRL);
ctrl |= (E1000_CTRL_FRCSPD | E1000_CTRL_FRCDPX);
ctrl &= ~(E1000_CTRL_SPD_SEL | E1000_CTRL_ILOS);
switch (hw->phy_type) { case e1000_phy_8201:
ret_val = e1000_read_phy_reg(hw, PHY_CTRL, &phy_data); if (ret_val) return ret_val;
e1000_config_collision_dist(hw); break; default: /* Set up duplex in the Device Control and Transmit Control * registers depending on negotiated values.
*/
ret_val = e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_STATUS,
&phy_data); if (ret_val) return ret_val;
/* Set up speed in the Device Control register depending on * negotiated values.
*/ if ((phy_data & M88E1000_PSSR_SPEED) == M88E1000_PSSR_1000MBS)
ctrl |= E1000_CTRL_SPD_1000; elseif ((phy_data & M88E1000_PSSR_SPEED) ==
M88E1000_PSSR_100MBS)
ctrl |= E1000_CTRL_SPD_100;
}
/* Write the configured values back to the Device Control Reg. */
ew32(CTRL, ctrl); return E1000_SUCCESS;
}
/** * e1000_force_mac_fc - force flow control settings * @hw: Struct containing variables accessed by shared code * * Forces the MAC's flow control settings. * Sets the TFCE and RFCE bits in the device control register to reflect * the adapter settings. TFCE and RFCE need to be explicitly set by * software when a Copper PHY is used because autonegotiation is managed * by the PHY rather than the MAC. Software must also configure these * bits when link is forced on a fiber connection.
*/
s32 e1000_force_mac_fc(struct e1000_hw *hw)
{
u32 ctrl;
/* Get the current configuration of the Device Control Register */
ctrl = er32(CTRL);
/* Because we didn't get link via the internal auto-negotiation * mechanism (we either forced link or we got link via PHY * auto-neg), we have to manually enable/disable transmit an * receive flow control. * * The "Case" statement below enables/disable flow control * according to the "hw->fc" parameter. * * The possible values of the "fc" parameter are: * 0: Flow control is completely disabled * 1: Rx flow control is enabled (we can receive pause * frames but not send pause frames). * 2: Tx flow control is enabled (we can send pause frames * but we do not receive pause frames). * 3: Both Rx and TX flow control (symmetric) is enabled. * other: No other values should be possible at this point.
*/
switch (hw->fc) { case E1000_FC_NONE:
ctrl &= (~(E1000_CTRL_TFCE | E1000_CTRL_RFCE)); break; case E1000_FC_RX_PAUSE:
ctrl &= (~E1000_CTRL_TFCE);
ctrl |= E1000_CTRL_RFCE; break; case E1000_FC_TX_PAUSE:
ctrl &= (~E1000_CTRL_RFCE);
ctrl |= E1000_CTRL_TFCE; break; case E1000_FC_FULL:
ctrl |= (E1000_CTRL_TFCE | E1000_CTRL_RFCE); break; default:
e_dbg("Flow control param set incorrectly\n"); return -E1000_ERR_CONFIG;
}
/* Disable TX Flow Control for 82542 (rev 2.0) */ if (hw->mac_type == e1000_82542_rev2_0)
ctrl &= (~E1000_CTRL_TFCE);
ew32(CTRL, ctrl); return E1000_SUCCESS;
}
/** * e1000_config_fc_after_link_up - configure flow control after autoneg * @hw: Struct containing variables accessed by shared code * * Configures flow control settings after link is established * Should be called immediately after a valid link has been established. * Forces MAC flow control settings if link was forced. When in MII/GMII mode * and autonegotiation is enabled, the MAC flow control settings will be set * based on the flow control negotiated by the PHY. In TBI mode, the TFCE * and RFCE bits will be automatically set to the negotiated flow control mode.
*/ static s32 e1000_config_fc_after_link_up(struct e1000_hw *hw)
{
s32 ret_val;
u16 mii_status_reg;
u16 mii_nway_adv_reg;
u16 mii_nway_lp_ability_reg;
u16 speed;
u16 duplex;
/* Check for the case where we have fiber media and auto-neg failed * so we had to force link. In this case, we need to force the * configuration of the MAC to match the "fc" parameter.
*/ if (((hw->media_type == e1000_media_type_fiber) &&
(hw->autoneg_failed)) ||
((hw->media_type == e1000_media_type_internal_serdes) &&
(hw->autoneg_failed)) ||
((hw->media_type == e1000_media_type_copper) &&
(!hw->autoneg))) {
ret_val = e1000_force_mac_fc(hw); if (ret_val) {
e_dbg("Error forcing flow control settings\n"); return ret_val;
}
}
/* Check for the case where we have copper media and auto-neg is * enabled. In this case, we need to check and see if Auto-Neg * has completed, and if so, how the PHY and link partner has * flow control configured.
*/ if ((hw->media_type == e1000_media_type_copper) && hw->autoneg) { /* Read the MII Status Register and check to see if AutoNeg * has completed. We read this twice because this reg has * some "sticky" (latched) bits.
*/
ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg); if (ret_val) return ret_val;
ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg); if (ret_val) return ret_val;
if (mii_status_reg & MII_SR_AUTONEG_COMPLETE) { /* The AutoNeg process has completed, so we now need to * read both the Auto Negotiation Advertisement Register * (Address 4) and the Auto_Negotiation Base Page * Ability Register (Address 5) to determine how flow * control was negotiated.
*/
ret_val = e1000_read_phy_reg(hw, PHY_AUTONEG_ADV,
&mii_nway_adv_reg); if (ret_val) return ret_val;
ret_val = e1000_read_phy_reg(hw, PHY_LP_ABILITY,
&mii_nway_lp_ability_reg); if (ret_val) return ret_val;
/* Two bits in the Auto Negotiation Advertisement * Register (Address 4) and two bits in the Auto * Negotiation Base Page Ability Register (Address 5) * determine flow control for both the PHY and the link * partner. The following table, taken out of the IEEE * 802.3ab/D6.0 dated March 25, 1999, describes these * PAUSE resolution bits and how flow control is * determined based upon these settings. * NOTE: DC = Don't Care * * LOCAL DEVICE | LINK PARTNER * PAUSE | ASM_DIR | PAUSE | ASM_DIR | NIC Resolution *-------|---------|-------|---------|------------------ * 0 | 0 | DC | DC | E1000_FC_NONE * 0 | 1 | 0 | DC | E1000_FC_NONE * 0 | 1 | 1 | 0 | E1000_FC_NONE * 0 | 1 | 1 | 1 | E1000_FC_TX_PAUSE * 1 | 0 | 0 | DC | E1000_FC_NONE * 1 | DC | 1 | DC | E1000_FC_FULL * 1 | 1 | 0 | 0 | E1000_FC_NONE * 1 | 1 | 0 | 1 | E1000_FC_RX_PAUSE *
*/ /* Are both PAUSE bits set to 1? If so, this implies * Symmetric Flow Control is enabled at both ends. The * ASM_DIR bits are irrelevant per the spec. * * For Symmetric Flow Control: * * LOCAL DEVICE | LINK PARTNER * PAUSE | ASM_DIR | PAUSE | ASM_DIR | Result *-------|---------|-------|---------|------------------ * 1 | DC | 1 | DC | E1000_FC_FULL *
*/ if ((mii_nway_adv_reg & NWAY_AR_PAUSE) &&
(mii_nway_lp_ability_reg & NWAY_LPAR_PAUSE)) { /* Now we need to check if the user selected Rx * ONLY of pause frames. In this case, we had * to advertise FULL flow control because we * could not advertise Rx ONLY. Hence, we must * now check to see if we need to turn OFF the * TRANSMISSION of PAUSE frames.
*/ if (hw->original_fc == E1000_FC_FULL) {
hw->fc = E1000_FC_FULL;
e_dbg("Flow Control = FULL.\n");
} else {
hw->fc = E1000_FC_RX_PAUSE;
e_dbg
("Flow Control = RX PAUSE frames only.\n");
}
} /* For receiving PAUSE frames ONLY. * * LOCAL DEVICE | LINK PARTNER * PAUSE | ASM_DIR | PAUSE | ASM_DIR | Result *-------|---------|-------|---------|------------------ * 0 | 1 | 1 | 1 | E1000_FC_TX_PAUSE *
*/ elseif (!(mii_nway_adv_reg & NWAY_AR_PAUSE) &&
(mii_nway_adv_reg & NWAY_AR_ASM_DIR) &&
(mii_nway_lp_ability_reg & NWAY_LPAR_PAUSE) &&
(mii_nway_lp_ability_reg & NWAY_LPAR_ASM_DIR)) {
hw->fc = E1000_FC_TX_PAUSE;
e_dbg
("Flow Control = TX PAUSE frames only.\n");
} /* For transmitting PAUSE frames ONLY. * * LOCAL DEVICE | LINK PARTNER * PAUSE | ASM_DIR | PAUSE | ASM_DIR | Result *-------|---------|-------|---------|------------------ * 1 | 1 | 0 | 1 | E1000_FC_RX_PAUSE *
*/ elseif ((mii_nway_adv_reg & NWAY_AR_PAUSE) &&
(mii_nway_adv_reg & NWAY_AR_ASM_DIR) &&
!(mii_nway_lp_ability_reg & NWAY_LPAR_PAUSE) &&
(mii_nway_lp_ability_reg & NWAY_LPAR_ASM_DIR)) {
hw->fc = E1000_FC_RX_PAUSE;
e_dbg
("Flow Control = RX PAUSE frames only.\n");
} /* Per the IEEE spec, at this point flow control should * be disabled. However, we want to consider that we * could be connected to a legacy switch that doesn't * advertise desired flow control, but can be forced on * the link partner. So if we advertised no flow * control, that is what we will resolve to. If we * advertised some kind of receive capability (Rx Pause * Only or Full Flow Control) and the link partner * advertised none, we will configure ourselves to * enable Rx Flow Control only. We can do this safely * for two reasons: If the link partner really * didn't want flow control enabled, and we enable Rx, * no harm done since we won't be receiving any PAUSE * frames anyway. If the intent on the link partner was * to have flow control enabled, then by us enabling Rx * only, we can at least receive pause frames and * process them. This is a good idea because in most * cases, since we are predominantly a server NIC, more * times than not we will be asked to delay transmission * of packets than asking our link partner to pause * transmission of frames.
*/ elseif ((hw->original_fc == E1000_FC_NONE ||
hw->original_fc == E1000_FC_TX_PAUSE) ||
hw->fc_strict_ieee) {
hw->fc = E1000_FC_NONE;
e_dbg("Flow Control = NONE.\n");
} else {
hw->fc = E1000_FC_RX_PAUSE;
e_dbg
("Flow Control = RX PAUSE frames only.\n");
}
/* Now we need to do one last check... If we auto- * negotiated to HALF DUPLEX, flow control should not be * enabled per IEEE 802.3 spec.
*/
ret_val =
e1000_get_speed_and_duplex(hw, &speed, &duplex); if (ret_val) {
e_dbg
("Error getting link speed and duplex\n"); return ret_val;
}
if (duplex == HALF_DUPLEX)
hw->fc = E1000_FC_NONE;
/* Now we call a subroutine to actually force the MAC * controller to use the correct flow control settings.
*/
ret_val = e1000_force_mac_fc(hw); if (ret_val) {
e_dbg
("Error forcing flow control settings\n"); return ret_val;
}
} else {
e_dbg
("Copper PHY and Auto Neg has not completed.\n");
}
} return E1000_SUCCESS;
}
/** * e1000_check_for_serdes_link_generic - Check for link (Serdes) * @hw: pointer to the HW structure * * Checks for link up on the hardware. If link is not up and we have * a signal, then we need to force link up.
*/ static s32 e1000_check_for_serdes_link_generic(struct e1000_hw *hw)
{
u32 rxcw;
u32 ctrl;
u32 status;
s32 ret_val = E1000_SUCCESS;
ctrl = er32(CTRL);
status = er32(STATUS);
rxcw = er32(RXCW);
/* If we don't have link (auto-negotiation failed or link partner * cannot auto-negotiate), and our link partner is not trying to * auto-negotiate with us (we are receiving idles or data), * we need to force link up. We also need to give auto-negotiation * time to complete.
*/ /* (ctrl & E1000_CTRL_SWDPIN1) == 1 == have signal */ if ((!(status & E1000_STATUS_LU)) && (!(rxcw & E1000_RXCW_C))) { if (hw->autoneg_failed == 0) {
hw->autoneg_failed = 1; goto out;
}
e_dbg("NOT RXing /C/, disable AutoNeg and force link.\n");
/* Disable auto-negotiation in the TXCW register */
ew32(TXCW, (hw->txcw & ~E1000_TXCW_ANE));
/* Force link-up and also force full-duplex. */
ctrl = er32(CTRL);
ctrl |= (E1000_CTRL_SLU | E1000_CTRL_FD);
ew32(CTRL, ctrl);
/* Configure Flow Control after forcing link up. */
ret_val = e1000_config_fc_after_link_up(hw); if (ret_val) {
e_dbg("Error configuring flow control\n"); goto out;
}
} elseif ((ctrl & E1000_CTRL_SLU) && (rxcw & E1000_RXCW_C)) { /* If we are forcing link and we are receiving /C/ ordered * sets, re-enable auto-negotiation in the TXCW register * and disable forced link in the Device Control register * in an attempt to auto-negotiate with our link partner.
*/
e_dbg("RXing /C/, enable AutoNeg and stop forcing link.\n");
ew32(TXCW, hw->txcw);
ew32(CTRL, (ctrl & ~E1000_CTRL_SLU));
hw->serdes_has_link = true;
} elseif (!(E1000_TXCW_ANE & er32(TXCW))) { /* If we force link for non-auto-negotiation switch, check * link status based on MAC synchronization for internal * serdes media type.
*/ /* SYNCH bit and IV bit are sticky. */
udelay(10);
rxcw = er32(RXCW); if (rxcw & E1000_RXCW_SYNCH) { if (!(rxcw & E1000_RXCW_IV)) {
hw->serdes_has_link = true;
e_dbg("SERDES: Link up - forced.\n");
}
} else {
hw->serdes_has_link = false;
e_dbg("SERDES: Link down - force failed.\n");
}
}
if (E1000_TXCW_ANE & er32(TXCW)) {
status = er32(STATUS); if (status & E1000_STATUS_LU) { /* SYNCH bit and IV bit are sticky, so reread rxcw. */
udelay(10);
rxcw = er32(RXCW); if (rxcw & E1000_RXCW_SYNCH) { if (!(rxcw & E1000_RXCW_IV)) {
hw->serdes_has_link = true;
e_dbg("SERDES: Link up - autoneg " "completed successfully.\n");
} else {
hw->serdes_has_link = false;
e_dbg("SERDES: Link down - invalid" "codewords detected in autoneg.\n");
}
} else {
hw->serdes_has_link = false;
e_dbg("SERDES: Link down - no sync.\n");
}
} else {
hw->serdes_has_link = false;
e_dbg("SERDES: Link down - autoneg failed\n");
}
}
out: return ret_val;
}
/** * e1000_check_for_link * @hw: Struct containing variables accessed by shared code * * Checks to see if the link status of the hardware has changed. * Called by any function that needs to check the link status of the adapter.
*/
s32 e1000_check_for_link(struct e1000_hw *hw)
{
u32 status;
u32 rctl;
u32 icr;
s32 ret_val;
u16 phy_data;
er32(CTRL);
status = er32(STATUS);
/* On adapters with a MAC newer than 82544, SW Definable pin 1 will be * set when the optics detect a signal. On older adapters, it will be * cleared when there is a signal. This applies to fiber media only.
*/ if ((hw->media_type == e1000_media_type_fiber) ||
(hw->media_type == e1000_media_type_internal_serdes)) {
er32(RXCW);
if (hw->media_type == e1000_media_type_fiber) { if (status & E1000_STATUS_LU)
hw->get_link_status = false;
}
}
/* If we have a copper PHY then we only want to go out to the PHY * registers to see if Auto-Neg has completed and/or if our link * status has changed. The get_link_status flag will be set if we * receive a Link Status Change interrupt or we have Rx Sequence * Errors.
*/ if ((hw->media_type == e1000_media_type_copper) && hw->get_link_status) { /* First we want to see if the MII Status Register reports * link. If so, then we want to get the current speed/duplex * of the PHY. * Read the register twice since the link bit is sticky.
*/
ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &phy_data); if (ret_val) return ret_val;
ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &phy_data); if (ret_val) return ret_val;
if (phy_data & MII_SR_LINK_STATUS) {
hw->get_link_status = false; /* Check if there was DownShift, must be checked * immediately after link-up
*/
e1000_check_downshift(hw);
/* If we are on 82544 or 82543 silicon and speed/duplex * are forced to 10H or 10F, then we will implement the * polarity reversal workaround. We disable interrupts * first, and upon returning, place the devices * interrupt state to its previous value except for the * link status change interrupt which will * happen due to the execution of this workaround.
*/
} else { /* No link detected */
e1000_config_dsp_after_link_change(hw, false); return 0;
}
/* If we are forcing speed/duplex, then we simply return since * we have already determined whether we have link or not.
*/ if (!hw->autoneg) return -E1000_ERR_CONFIG;
/* optimize the dsp settings for the igp phy */
e1000_config_dsp_after_link_change(hw, true);
/* We have a M88E1000 PHY and Auto-Neg is enabled. If we * have Si on board that is 82544 or newer, Auto * Speed Detection takes care of MAC speed/duplex * configuration. So we only need to configure Collision * Distance in the MAC. Otherwise, we need to force * speed/duplex on the MAC to the current PHY speed/duplex * settings.
*/ if ((hw->mac_type >= e1000_82544) &&
(hw->mac_type != e1000_ce4100))
e1000_config_collision_dist(hw); else {
ret_val = e1000_config_mac_to_phy(hw); if (ret_val) {
e_dbg
("Error configuring MAC to PHY settings\n"); return ret_val;
}
}
/* Configure Flow Control now that Auto-Neg has completed. * First, we need to restore the desired flow control settings * because we may have had to re-autoneg with a different link * partner.
*/
ret_val = e1000_config_fc_after_link_up(hw); if (ret_val) {
e_dbg("Error configuring flow control\n"); return ret_val;
}
/* At this point we know that we are on copper and we have * auto-negotiated link. These are conditions for checking the * link partner capability register. We use the link speed to * determine if TBI compatibility needs to be turned on or off. * If the link is not at gigabit speed, then TBI compatibility * is not needed. If we are at gigabit speed, we turn on TBI * compatibility.
*/ if (hw->tbi_compatibility_en) {
u16 speed, duplex;
if (ret_val) {
e_dbg
("Error getting link speed and duplex\n"); return ret_val;
} if (speed != SPEED_1000) { /* If link speed is not set to gigabit speed, we * do not need to enable TBI compatibility.
*/ if (hw->tbi_compatibility_on) { /* If we previously were in the mode, * turn it off.
*/
rctl = er32(RCTL);
rctl &= ~E1000_RCTL_SBP;
ew32(RCTL, rctl);
hw->tbi_compatibility_on = false;
}
} else { /* If TBI compatibility is was previously off, * turn it on. For compatibility with a TBI link * partner, we will store bad packets. Some * frames have an additional byte on the end and * will look like CRC errors to the hardware.
*/ if (!hw->tbi_compatibility_on) {
hw->tbi_compatibility_on = true;
rctl = er32(RCTL);
rctl |= E1000_RCTL_SBP;
ew32(RCTL, rctl);
}
}
}
}
if ((hw->media_type == e1000_media_type_fiber) ||
(hw->media_type == e1000_media_type_internal_serdes))
e1000_check_for_serdes_link_generic(hw);
return E1000_SUCCESS;
}
/** * e1000_get_speed_and_duplex * @hw: Struct containing variables accessed by shared code * @speed: Speed of the connection * @duplex: Duplex setting of the connection * * Detects the current speed and duplex settings of the hardware.
*/
s32 e1000_get_speed_and_duplex(struct e1000_hw *hw, u16 *speed, u16 *duplex)
{
u32 status;
s32 ret_val;
u16 phy_data;
/* IGP01 PHY may advertise full duplex operation after speed downgrade * even if it is operating at half duplex. Here we set the duplex * settings to match the duplex in the link partner's capabilities.
*/ if (hw->phy_type == e1000_phy_igp && hw->speed_downgraded) {
ret_val = e1000_read_phy_reg(hw, PHY_AUTONEG_EXP, &phy_data); if (ret_val) return ret_val;
/** * e1000_wait_autoneg * @hw: Struct containing variables accessed by shared code * * Blocks until autoneg completes or times out (~4.5 seconds)
*/ static s32 e1000_wait_autoneg(struct e1000_hw *hw)
{
s32 ret_val;
u16 i;
u16 phy_data;
e_dbg("Waiting for Auto-Neg to complete.\n");
/* We will wait for autoneg to complete or 4.5 seconds to expire. */ for (i = PHY_AUTO_NEG_TIME; i > 0; i--) { /* Read the MII Status Register and wait for Auto-Neg * Complete bit to be set.
*/
ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &phy_data); if (ret_val) return ret_val;
ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &phy_data); if (ret_val) return ret_val; if (phy_data & MII_SR_AUTONEG_COMPLETE) return E1000_SUCCESS;
msleep(100);
} return E1000_SUCCESS;
}
/** * e1000_raise_mdi_clk - Raises the Management Data Clock * @hw: Struct containing variables accessed by shared code * @ctrl: Device control register's current value
*/ staticvoid e1000_raise_mdi_clk(struct e1000_hw *hw, u32 *ctrl)
{ /* Raise the clock input to the Management Data Clock (by setting the * MDC bit), and then delay 10 microseconds.
*/
ew32(CTRL, (*ctrl | E1000_CTRL_MDC));
E1000_WRITE_FLUSH();
udelay(10);
}
/** * e1000_lower_mdi_clk - Lowers the Management Data Clock * @hw: Struct containing variables accessed by shared code * @ctrl: Device control register's current value
*/ staticvoid e1000_lower_mdi_clk(struct e1000_hw *hw, u32 *ctrl)
{ /* Lower the clock input to the Management Data Clock (by clearing the * MDC bit), and then delay 10 microseconds.
*/
ew32(CTRL, (*ctrl & ~E1000_CTRL_MDC));
E1000_WRITE_FLUSH();
udelay(10);
}
/** * e1000_shift_out_mdi_bits - Shifts data bits out to the PHY * @hw: Struct containing variables accessed by shared code * @data: Data to send out to the PHY * @count: Number of bits to shift out * * Bits are shifted out in MSB to LSB order.
*/ staticvoid e1000_shift_out_mdi_bits(struct e1000_hw *hw, u32 data, u16 count)
{
u32 ctrl;
u32 mask;
/* We need to shift "count" number of bits out to the PHY. So, the value * in the "data" parameter will be shifted out to the PHY one bit at a * time. In order to do this, "data" must be broken down into bits.
*/
mask = 0x01;
mask <<= (count - 1);
ctrl = er32(CTRL);
/* Set MDIO_DIR and MDC_DIR direction bits to be used as output pins. */
ctrl |= (E1000_CTRL_MDIO_DIR | E1000_CTRL_MDC_DIR);
while (mask) { /* A "1" is shifted out to the PHY by setting the MDIO bit to * "1" and then raising and lowering the Management Data Clock. * A "0" is shifted out to the PHY by setting the MDIO bit to * "0" and then raising and lowering the clock.
*/ if (data & mask)
ctrl |= E1000_CTRL_MDIO; else
ctrl &= ~E1000_CTRL_MDIO;
/** * e1000_shift_in_mdi_bits - Shifts data bits in from the PHY * @hw: Struct containing variables accessed by shared code * * Bits are shifted in MSB to LSB order.
*/ static u16 e1000_shift_in_mdi_bits(struct e1000_hw *hw)
{
u32 ctrl;
u16 data = 0;
u8 i;
/* In order to read a register from the PHY, we need to shift in a total * of 18 bits from the PHY. The first two bit (turnaround) times are * used to avoid contention on the MDIO pin when a read operation is * performed. These two bits are ignored by us and thrown away. Bits are * "shifted in" by raising the input to the Management Data Clock * (setting the MDC bit), and then reading the value of the MDIO bit.
*/
ctrl = er32(CTRL);
/* Clear MDIO_DIR (SWDPIO1) to indicate this bit is to be used as * input.
*/
ctrl &= ~E1000_CTRL_MDIO_DIR;
ctrl &= ~E1000_CTRL_MDIO;
ew32(CTRL, ctrl);
E1000_WRITE_FLUSH();
/* Raise and Lower the clock before reading in the data. This accounts * for the turnaround bits. The first clock occurred when we clocked out * the last bit of the Register Address.
*/
e1000_raise_mdi_clk(hw, &ctrl);
e1000_lower_mdi_clk(hw, &ctrl);
for (data = 0, i = 0; i < 16; i++) {
data = data << 1;
e1000_raise_mdi_clk(hw, &ctrl);
ctrl = er32(CTRL); /* Check to see if we shifted in a "1". */ if (ctrl & E1000_CTRL_MDIO)
data |= 1;
e1000_lower_mdi_clk(hw, &ctrl);
}
/** * e1000_read_phy_reg - read a phy register * @hw: Struct containing variables accessed by shared code * @reg_addr: address of the PHY register to read * @phy_data: pointer to the value on the PHY register * * Reads the value from a PHY register, if the value is on a specific non zero * page, sets the page first.
*/
s32 e1000_read_phy_reg(struct e1000_hw *hw, u32 reg_addr, u16 *phy_data)
{
u32 ret_val; unsignedlong flags;
spin_lock_irqsave(&e1000_phy_lock, flags);
if ((hw->phy_type == e1000_phy_igp) &&
(reg_addr > MAX_PHY_MULTI_PAGE_REG)) {
ret_val = e1000_write_phy_reg_ex(hw, IGP01E1000_PHY_PAGE_SELECT,
(u16) reg_addr); if (ret_val) goto out;
}
if (reg_addr > MAX_PHY_REG_ADDRESS) {
e_dbg("PHY Address %d is out of range\n", reg_addr); return -E1000_ERR_PARAM;
}
if (hw->mac_type > e1000_82543) { /* Set up Op-code, Phy Address, and register address in the MDI * Control register. The MAC will take care of interfacing with * the PHY to retrieve the desired data.
*/ if (hw->mac_type == e1000_ce4100) {
mdic = ((reg_addr << E1000_MDIC_REG_SHIFT) |
(phy_addr << E1000_MDIC_PHY_SHIFT) |
(INTEL_CE_GBE_MDIC_OP_READ) |
(INTEL_CE_GBE_MDIC_GO));
writel(mdic, E1000_MDIO_CMD);
/* Poll the ready bit to see if the MDI read * completed
*/ for (i = 0; i < 64; i++) {
udelay(50);
mdic = readl(E1000_MDIO_CMD); if (!(mdic & INTEL_CE_GBE_MDIC_GO)) break;
}
if (mdic & INTEL_CE_GBE_MDIC_GO) {
e_dbg("MDI Read did not complete\n"); return -E1000_ERR_PHY;
}
/* Poll the ready bit to see if the MDI read * completed
*/ for (i = 0; i < 64; i++) {
udelay(50);
mdic = er32(MDIC); if (mdic & E1000_MDIC_READY) break;
} if (!(mdic & E1000_MDIC_READY)) {
e_dbg("MDI Read did not complete\n"); return -E1000_ERR_PHY;
} if (mdic & E1000_MDIC_ERROR) {
e_dbg("MDI Error\n"); return -E1000_ERR_PHY;
}
*phy_data = (u16)mdic;
}
} else { /* We must first send a preamble through the MDIO pin to signal * the beginning of an MII instruction. This is done by sending * 32 consecutive "1" bits.
*/
e1000_shift_out_mdi_bits(hw, PHY_PREAMBLE, PHY_PREAMBLE_SIZE);
/* Now combine the next few fields that are required for a read * operation. We use this method instead of calling the * e1000_shift_out_mdi_bits routine five different times. The * format of a MII read instruction consists of a shift out of * 14 bits and is defined as follows: * <Preamble><SOF><Op Code><Phy Addr><Reg Addr> * followed by a shift in of 18 bits. This first two bits * shifted in are TurnAround bits used to avoid contention on * the MDIO pin when a READ operation is performed. These two * bits are thrown away followed by a shift in of 16 bits which * contains the desired data.
*/
mdic = ((reg_addr) | (phy_addr << 5) |
(PHY_OP_READ << 10) | (PHY_SOF << 12));
e1000_shift_out_mdi_bits(hw, mdic, 14);
/* Now that we've shifted out the read command to the MII, we * need to "shift in" the 16-bit value (18 total bits) of the * requested PHY register address.
*/
*phy_data = e1000_shift_in_mdi_bits(hw);
} return E1000_SUCCESS;
}
/** * e1000_write_phy_reg - write a phy register * * @hw: Struct containing variables accessed by shared code * @reg_addr: address of the PHY register to write * @phy_data: data to write to the PHY * * Writes a value to a PHY register
*/
s32 e1000_write_phy_reg(struct e1000_hw *hw, u32 reg_addr, u16 phy_data)
{
u32 ret_val; unsignedlong flags;
if (reg_addr > MAX_PHY_REG_ADDRESS) {
e_dbg("PHY Address %d is out of range\n", reg_addr); return -E1000_ERR_PARAM;
}
if (hw->mac_type > e1000_82543) { /* Set up Op-code, Phy Address, register address, and data * intended for the PHY register in the MDI Control register. * The MAC will take care of interfacing with the PHY to send * the desired data.
*/ if (hw->mac_type == e1000_ce4100) {
mdic = (((u32)phy_data) |
(reg_addr << E1000_MDIC_REG_SHIFT) |
(phy_addr << E1000_MDIC_PHY_SHIFT) |
(INTEL_CE_GBE_MDIC_OP_WRITE) |
(INTEL_CE_GBE_MDIC_GO));
writel(mdic, E1000_MDIO_CMD);
/* Poll the ready bit to see if the MDI read * completed
*/ for (i = 0; i < 640; i++) {
udelay(5);
mdic = readl(E1000_MDIO_CMD); if (!(mdic & INTEL_CE_GBE_MDIC_GO)) break;
} if (mdic & INTEL_CE_GBE_MDIC_GO) {
e_dbg("MDI Write did not complete\n"); return -E1000_ERR_PHY;
}
} else {
mdic = (((u32)phy_data) |
(reg_addr << E1000_MDIC_REG_SHIFT) |
(phy_addr << E1000_MDIC_PHY_SHIFT) |
(E1000_MDIC_OP_WRITE));
ew32(MDIC, mdic);
/* Poll the ready bit to see if the MDI read * completed
*/ for (i = 0; i < 641; i++) {
udelay(5);
mdic = er32(MDIC); if (mdic & E1000_MDIC_READY) break;
} if (!(mdic & E1000_MDIC_READY)) {
e_dbg("MDI Write did not complete\n"); return -E1000_ERR_PHY;
}
}
} else { /* We'll need to use the SW defined pins to shift the write * command out to the PHY. We first send a preamble to the PHY * to signal the beginning of the MII instruction. This is done * by sending 32 consecutive "1" bits.
*/
e1000_shift_out_mdi_bits(hw, PHY_PREAMBLE, PHY_PREAMBLE_SIZE);
/* Now combine the remaining required fields that will indicate * a write operation. We use this method instead of calling the * e1000_shift_out_mdi_bits routine for each field in the * command. The format of a MII write instruction is as follows: * <Preamble><SOF><OpCode><PhyAddr><RegAddr><Turnaround><Data>.
*/
mdic = ((PHY_TURNAROUND) | (reg_addr << 2) | (phy_addr << 7) |
(PHY_OP_WRITE << 12) | (PHY_SOF << 14));
mdic <<= 16;
mdic |= (u32)phy_data;
e1000_shift_out_mdi_bits(hw, mdic, 32);
}
return E1000_SUCCESS;
}
/** * e1000_phy_hw_reset - reset the phy, hardware style * @hw: Struct containing variables accessed by shared code * * Returns the PHY to the power-on reset state
*/
s32 e1000_phy_hw_reset(struct e1000_hw *hw)
{
u32 ctrl, ctrl_ext;
u32 led_ctrl;
e_dbg("Resetting Phy...\n");
if (hw->mac_type > e1000_82543) { /* Read the device control register and assert the * E1000_CTRL_PHY_RST bit. Then, take it out of reset. * For e1000 hardware, we delay for 10ms between the assert * and de-assert.
*/
ctrl = er32(CTRL);
ew32(CTRL, ctrl | E1000_CTRL_PHY_RST);
E1000_WRITE_FLUSH();
msleep(10);
ew32(CTRL, ctrl);
E1000_WRITE_FLUSH();
} else { /* Read the Extended Device Control Register, assert the * PHY_RESET_DIR bit to put the PHY into reset. Then, take it * out of reset.
*/
ctrl_ext = er32(CTRL_EXT);
ctrl_ext |= E1000_CTRL_EXT_SDP4_DIR;
ctrl_ext &= ~E1000_CTRL_EXT_SDP4_DATA;
ew32(CTRL_EXT, ctrl_ext);
E1000_WRITE_FLUSH();
msleep(10);
ctrl_ext |= E1000_CTRL_EXT_SDP4_DATA;
ew32(CTRL_EXT, ctrl_ext);
E1000_WRITE_FLUSH();
}
udelay(150);
/* Wait for FW to finish PHY configuration. */ return e1000_get_phy_cfg_done(hw);
}
/** * e1000_phy_reset - reset the phy to commit settings * @hw: Struct containing variables accessed by shared code * * Resets the PHY * Sets bit 15 of the MII Control register
*/
s32 e1000_phy_reset(struct e1000_hw *hw)
{
s32 ret_val;
u16 phy_data;
switch (hw->phy_type) { case e1000_phy_igp:
ret_val = e1000_phy_hw_reset(hw); if (ret_val) return ret_val; break; default:
ret_val = e1000_read_phy_reg(hw, PHY_CTRL, &phy_data); if (ret_val) return ret_val;
if (hw->phy_type == e1000_phy_igp)
e1000_phy_init_script(hw);
return E1000_SUCCESS;
}
/** * e1000_detect_gig_phy - check the phy type * @hw: Struct containing variables accessed by shared code * * Probes the expected PHY address for known PHY IDs
*/ static s32 e1000_detect_gig_phy(struct e1000_hw *hw)
{
s32 phy_init_status, ret_val;
u16 phy_id_high, phy_id_low; bool match = false;
if (hw->phy_id != 0) return E1000_SUCCESS;
/* Read the PHY ID Registers to identify which PHY is onboard. */
ret_val = e1000_read_phy_reg(hw, PHY_ID1, &phy_id_high); if (ret_val) return ret_val;
switch (hw->mac_type) { case e1000_82543: if (hw->phy_id == M88E1000_E_PHY_ID)
match = true; break; case e1000_82544: if (hw->phy_id == M88E1000_I_PHY_ID)
match = true; break; case e1000_82540: case e1000_82545: case e1000_82545_rev_3: case e1000_82546: case e1000_82546_rev_3: if (hw->phy_id == M88E1011_I_PHY_ID)
match = true; break; case e1000_ce4100: if ((hw->phy_id == RTL8211B_PHY_ID) ||
(hw->phy_id == RTL8201N_PHY_ID) ||
(hw->phy_id == M88E1118_E_PHY_ID))
match = true; break; case e1000_82541: case e1000_82541_rev_2: case e1000_82547: case e1000_82547_rev_2: if (hw->phy_id == IGP01E1000_I_PHY_ID)
match = true; break; default:
e_dbg("Invalid MAC type %d\n", hw->mac_type); return -E1000_ERR_CONFIG;
}
phy_init_status = e1000_set_phy_type(hw);
if ((match) && (phy_init_status == E1000_SUCCESS)) {
e_dbg("PHY ID 0x%X detected\n", hw->phy_id); return E1000_SUCCESS;
}
e_dbg("Invalid PHY ID 0x%X\n", hw->phy_id); return -E1000_ERR_PHY;
}
do {
ret_val = e1000_write_phy_reg(hw, 29, 0x001d); if (ret_val) break;
ret_val = e1000_write_phy_reg(hw, 30, 0x00c1); if (ret_val) break;
ret_val = e1000_write_phy_reg(hw, 30, 0x0000); if (ret_val) break;
ret_val = E1000_SUCCESS;
} while (0);
return ret_val;
}
/** * e1000_phy_igp_get_info - get igp specific registers * @hw: Struct containing variables accessed by shared code * @phy_info: PHY information structure * * Get PHY information from various PHY registers for igp PHY only.
*/ static s32 e1000_phy_igp_get_info(struct e1000_hw *hw, struct e1000_phy_info *phy_info)
{
s32 ret_val;
u16 phy_data, min_length, max_length, average;
e1000_rev_polarity polarity;
/* The downshift status is checked only once, after link is established, * and it stored in the hw->speed_downgraded parameter.
*/
phy_info->downshift = (e1000_downshift) hw->speed_downgraded;
/* IGP01E1000 does not need to support it. */
phy_info->extended_10bt_distance = e1000_10bt_ext_dist_enable_normal;
/** * e1000_phy_m88_get_info - get m88 specific registers * @hw: Struct containing variables accessed by shared code * @phy_info: PHY information structure * * Get PHY information from various PHY registers for m88 PHY only.
*/ static s32 e1000_phy_m88_get_info(struct e1000_hw *hw, struct e1000_phy_info *phy_info)
{
s32 ret_val;
u16 phy_data;
e1000_rev_polarity polarity;
/* The downshift status is checked only once, after link is established, * and it stored in the hw->speed_downgraded parameter.
*/
phy_info->downshift = (e1000_downshift) hw->speed_downgraded;
ret_val = e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_CTRL, &phy_data); if (ret_val) return ret_val;
if ((phy_data & M88E1000_PSSR_SPEED) == M88E1000_PSSR_1000MBS) { /* Cable Length Estimation and Local/Remote Receiver Information * are only valid at 1000 Mbps.
*/
phy_info->cable_length =
(e1000_cable_length)FIELD_GET(M88E1000_PSSR_CABLE_LENGTH,
phy_data);
ret_val = e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_data); if (ret_val) return ret_val;
/** * e1000_init_eeprom_params - initialize sw eeprom vars * @hw: Struct containing variables accessed by shared code * * Sets up eeprom variables in the hw struct. Must be called after mac_type * is configured.
*/
s32 e1000_init_eeprom_params(struct e1000_hw *hw)
{ struct e1000_eeprom_info *eeprom = &hw->eeprom;
u32 eecd = er32(EECD);
s32 ret_val = E1000_SUCCESS;
u16 eeprom_size;
switch (hw->mac_type) { case e1000_82542_rev2_0: case e1000_82542_rev2_1: case e1000_82543: case e1000_82544:
eeprom->type = e1000_eeprom_microwire;
eeprom->word_size = 64;
eeprom->opcode_bits = 3;
eeprom->address_bits = 6;
eeprom->delay_usec = 50; break; case e1000_82540: case e1000_82545: case e1000_82545_rev_3: case e1000_82546: case e1000_82546_rev_3:
eeprom->type = e1000_eeprom_microwire;
eeprom->opcode_bits = 3;
eeprom->delay_usec = 50; if (eecd & E1000_EECD_SIZE) {
eeprom->word_size = 256;
eeprom->address_bits = 8;
} else {
eeprom->word_size = 64;
eeprom->address_bits = 6;
} break; case e1000_82541: case e1000_82541_rev_2: case e1000_82547: case e1000_82547_rev_2: if (eecd & E1000_EECD_TYPE) {
eeprom->type = e1000_eeprom_spi;
eeprom->opcode_bits = 8;
eeprom->delay_usec = 1; if (eecd & E1000_EECD_ADDR_BITS) {
eeprom->page_size = 32;
eeprom->address_bits = 16;
} else {
eeprom->page_size = 8;
eeprom->address_bits = 8;
}
} else {
eeprom->type = e1000_eeprom_microwire;
eeprom->opcode_bits = 3;
eeprom->delay_usec = 50; if (eecd & E1000_EECD_ADDR_BITS) {
eeprom->word_size = 256;
eeprom->address_bits = 8;
} else {
eeprom->word_size = 64;
eeprom->address_bits = 6;
}
} break; default: break;
}
if (eeprom->type == e1000_eeprom_spi) { /* eeprom_size will be an enum [0..8] that maps to eeprom sizes * 128B to 32KB (incremented by powers of 2).
*/ /* Set to default value for initial eeprom read. */
eeprom->word_size = 64;
ret_val = e1000_read_eeprom(hw, EEPROM_CFG, 1, &eeprom_size); if (ret_val) return ret_val;
eeprom_size =
FIELD_GET(EEPROM_SIZE_MASK, eeprom_size); /* 256B eeprom size was not supported in earlier hardware, so we * bump eeprom_size up one to ensure that "1" (which maps to * 256B) is never the result used in the shifting logic below.
*/ if (eeprom_size)
eeprom_size++;
/** * e1000_raise_ee_clk - Raises the EEPROM's clock input. * @hw: Struct containing variables accessed by shared code * @eecd: EECD's current value
*/ staticvoid e1000_raise_ee_clk(struct e1000_hw *hw, u32 *eecd)
{ /* Raise the clock input to the EEPROM (by setting the SK bit), and then * wait <delay> microseconds.
*/
*eecd = *eecd | E1000_EECD_SK;
ew32(EECD, *eecd);
E1000_WRITE_FLUSH();
udelay(hw->eeprom.delay_usec);
}
/** * e1000_lower_ee_clk - Lowers the EEPROM's clock input. * @hw: Struct containing variables accessed by shared code * @eecd: EECD's current value
*/ staticvoid e1000_lower_ee_clk(struct e1000_hw *hw, u32 *eecd)
{ /* Lower the clock input to the EEPROM (by clearing the SK bit), and * then wait 50 microseconds.
*/
*eecd = *eecd & ~E1000_EECD_SK;
ew32(EECD, *eecd);
E1000_WRITE_FLUSH();
udelay(hw->eeprom.delay_usec);
}
/** * e1000_shift_out_ee_bits - Shift data bits out to the EEPROM. * @hw: Struct containing variables accessed by shared code * @data: data to send to the EEPROM * @count: number of bits to shift out
*/ staticvoid e1000_shift_out_ee_bits(struct e1000_hw *hw, u16 data, u16 count)
{ struct e1000_eeprom_info *eeprom = &hw->eeprom;
u32 eecd;
u32 mask;
/* We need to shift "count" bits out to the EEPROM. So, value in the * "data" parameter will be shifted out to the EEPROM one bit at a time. * In order to do this, "data" must be broken down into bits.
*/
mask = 0x01 << (count - 1);
eecd = er32(EECD); if (eeprom->type == e1000_eeprom_microwire)
eecd &= ~E1000_EECD_DO; elseif (eeprom->type == e1000_eeprom_spi)
eecd |= E1000_EECD_DO;
do { /* A "1" is shifted out to the EEPROM by setting bit "DI" to a * "1", and then raising and then lowering the clock (the SK bit * controls the clock input to the EEPROM). A "0" is shifted * out to the EEPROM by setting "DI" to "0" and then raising and * then lowering the clock.
*/
eecd &= ~E1000_EECD_DI;
/* We leave the "DI" bit set to "0" when we leave this routine. */
eecd &= ~E1000_EECD_DI;
ew32(EECD, eecd);
}
/** * e1000_shift_in_ee_bits - Shift data bits in from the EEPROM * @hw: Struct containing variables accessed by shared code * @count: number of bits to shift in
*/ static u16 e1000_shift_in_ee_bits(struct e1000_hw *hw, u16 count)
{
u32 eecd;
u32 i;
u16 data;
/* In order to read a register from the EEPROM, we need to shift 'count' * bits in from the EEPROM. Bits are "shifted in" by raising the clock * input to the EEPROM (setting the SK bit), and then reading the value * of the "DO" bit. During this "shifting in" process the "DI" bit * should always be clear.
*/
eecd = er32(EECD);
eecd &= ~(E1000_EECD_DO | E1000_EECD_DI);
data = 0;
for (i = 0; i < count; i++) {
data = data << 1;
e1000_raise_ee_clk(hw, &eecd);
eecd = er32(EECD);
eecd &= ~(E1000_EECD_DI); if (eecd & E1000_EECD_DO)
data |= 1;
e1000_lower_ee_clk(hw, &eecd);
}
return data;
}
/** * e1000_acquire_eeprom - Prepares EEPROM for access * @hw: Struct containing variables accessed by shared code * * Lowers EEPROM clock. Clears input pin. Sets the chip select pin. This * function should be called before issuing a command to the EEPROM.
*/ static s32 e1000_acquire_eeprom(struct e1000_hw *hw)
{ struct e1000_eeprom_info *eeprom = &hw->eeprom;
u32 eecd, i = 0;
/** * e1000_spi_eeprom_ready - Reads a 16 bit word from the EEPROM. * @hw: Struct containing variables accessed by shared code
*/ static s32 e1000_spi_eeprom_ready(struct e1000_hw *hw)
{
u16 retry_count = 0;
u8 spi_stat_reg;
/* Read "Status Register" repeatedly until the LSB is cleared. The * EEPROM will signal that the command has been completed by clearing * bit 0 of the internal status register. If it's not cleared within * 5 milliseconds, then error out.
*/
retry_count = 0; do {
e1000_shift_out_ee_bits(hw, EEPROM_RDSR_OPCODE_SPI,
hw->eeprom.opcode_bits);
spi_stat_reg = (u8)e1000_shift_in_ee_bits(hw, 8); if (!(spi_stat_reg & EEPROM_STATUS_RDY_SPI)) break;
udelay(5);
retry_count += 5;
e1000_standby_eeprom(hw);
} while (retry_count < EEPROM_MAX_RETRY_SPI);
/* ATMEL SPI write time could vary from 0-20mSec on 3.3V devices (and * only 0-5mSec on 5V devices)
*/ if (retry_count >= EEPROM_MAX_RETRY_SPI) {
e_dbg("SPI EEPROM Status error\n"); return -E1000_ERR_EEPROM;
}
return E1000_SUCCESS;
}
/** * e1000_read_eeprom - Reads a 16 bit word from the EEPROM. * @hw: Struct containing variables accessed by shared code * @offset: offset of word in the EEPROM to read * @data: word read from the EEPROM * @words: number of words to read
*/
s32 e1000_read_eeprom(struct e1000_hw *hw, u16 offset, u16 words, u16 *data)
{
s32 ret;
/* A check for invalid values: offset too large, too many words, and * not enough words.
*/ if ((offset >= eeprom->word_size) ||
(words > eeprom->word_size - offset) ||
(words == 0)) {
e_dbg("\"words\" parameter out of bounds. Words = %d," "size = %d\n", offset, eeprom->word_size); return -E1000_ERR_EEPROM;
}
/* EEPROM's that don't use EERD to read require us to bit-bang the SPI * directly. In this case, we need to acquire the EEPROM so that * FW or other port software does not interrupt.
*/ /* Prepare the EEPROM for bit-bang reading */ if (e1000_acquire_eeprom(hw) != E1000_SUCCESS) return -E1000_ERR_EEPROM;
/* Set up the SPI or Microwire EEPROM for bit-bang reading. We have * acquired the EEPROM at this point, so any returns should release it
*/ if (eeprom->type == e1000_eeprom_spi) {
u16 word_in;
u8 read_opcode = EEPROM_READ_OPCODE_SPI;
if (e1000_spi_eeprom_ready(hw)) {
e1000_release_eeprom(hw); return -E1000_ERR_EEPROM;
}
e1000_standby_eeprom(hw);
/* Some SPI eeproms use the 8th address bit embedded in the * opcode
*/ if ((eeprom->address_bits == 8) && (offset >= 128))
read_opcode |= EEPROM_A8_OPCODE_SPI;
/* Read the data. The address of the eeprom internally * increments with each byte (spi) being read, saving on the * overhead of eeprom setup and tear-down. The address counter * will roll over if reading beyond the size of the eeprom, thus * allowing the entire memory to be read starting from any * offset.
*/ for (i = 0; i < words; i++) {
word_in = e1000_shift_in_ee_bits(hw, 16);
data[i] = (word_in >> 8) | (word_in << 8);
}
} elseif (eeprom->type == e1000_eeprom_microwire) { for (i = 0; i < words; i++) { /* Send the READ command (opcode + addr) */
e1000_shift_out_ee_bits(hw,
EEPROM_READ_OPCODE_MICROWIRE,
eeprom->opcode_bits);
e1000_shift_out_ee_bits(hw, (u16)(offset + i),
eeprom->address_bits);
/* Read the data. For microwire, each word requires the * overhead of eeprom setup and tear-down.
*/
data[i] = e1000_shift_in_ee_bits(hw, 16);
e1000_standby_eeprom(hw);
cond_resched();
}
}
/* End this read operation */
e1000_release_eeprom(hw);
return E1000_SUCCESS;
}
/** * e1000_validate_eeprom_checksum - Verifies that the EEPROM has a valid checksum * @hw: Struct containing variables accessed by shared code * * Reads the first 64 16 bit words of the EEPROM and sums the values read. * If the sum of the 64 16 bit words is 0xBABA, the EEPROM's checksum is * valid.
*/
s32 e1000_validate_eeprom_checksum(struct e1000_hw *hw)
{
u16 checksum = 0;
u16 i, eeprom_data;
for (i = 0; i < (EEPROM_CHECKSUM_REG + 1); i++) { if (e1000_read_eeprom(hw, i, 1, &eeprom_data) < 0) {
e_dbg("EEPROM Read Error\n"); return -E1000_ERR_EEPROM;
}
checksum += eeprom_data;
}
#ifdef CONFIG_PARISC /* This is a signature and not a checksum on HP c8000 */ if ((hw->subsystem_vendor_id == 0x103C) && (eeprom_data == 0x16d6)) return E1000_SUCCESS;
/** * e1000_update_eeprom_checksum - Calculates/writes the EEPROM checksum * @hw: Struct containing variables accessed by shared code * * Sums the first 63 16 bit words of the EEPROM. Subtracts the sum from 0xBABA. * Writes the difference to word offset 63 of the EEPROM.
*/
s32 e1000_update_eeprom_checksum(struct e1000_hw *hw)
{
u16 checksum = 0;
u16 i, eeprom_data;
for (i = 0; i < EEPROM_CHECKSUM_REG; i++) { if (e1000_read_eeprom(hw, i, 1, &eeprom_data) < 0) {
e_dbg("EEPROM Read Error\n"); return -E1000_ERR_EEPROM;
}
checksum += eeprom_data;
}
checksum = (u16)EEPROM_SUM - checksum; if (e1000_write_eeprom(hw, EEPROM_CHECKSUM_REG, 1, &checksum) < 0) {
e_dbg("EEPROM Write Error\n"); return -E1000_ERR_EEPROM;
} return E1000_SUCCESS;
}
/** * e1000_write_eeprom - write words to the different EEPROM types. * @hw: Struct containing variables accessed by shared code * @offset: offset within the EEPROM to be written to * @words: number of words to write * @data: 16 bit word to be written to the EEPROM * * If e1000_update_eeprom_checksum is not called after this function, the * EEPROM will most likely contain an invalid checksum.
*/
s32 e1000_write_eeprom(struct e1000_hw *hw, u16 offset, u16 words, u16 *data)
{
s32 ret;
/* A check for invalid values: offset too large, too many words, and * not enough words.
*/ if ((offset >= eeprom->word_size) ||
(words > eeprom->word_size - offset) ||
(words == 0)) {
e_dbg("\"words\" parameter out of bounds\n"); return -E1000_ERR_EEPROM;
}
/* Prepare the EEPROM for writing */ if (e1000_acquire_eeprom(hw) != E1000_SUCCESS) return -E1000_ERR_EEPROM;
if (eeprom->type == e1000_eeprom_microwire) {
status = e1000_write_eeprom_microwire(hw, offset, words, data);
} else {
status = e1000_write_eeprom_spi(hw, offset, words, data);
msleep(10);
}
/* Done with writing */
e1000_release_eeprom(hw);
return status;
}
/** * e1000_write_eeprom_spi - Writes a 16 bit word to a given offset in an SPI EEPROM. * @hw: Struct containing variables accessed by shared code * @offset: offset within the EEPROM to be written to * @words: number of words to write * @data: pointer to array of 8 bit words to be written to the EEPROM
*/ static s32 e1000_write_eeprom_spi(struct e1000_hw *hw, u16 offset, u16 words,
u16 *data)
{ struct e1000_eeprom_info *eeprom = &hw->eeprom;
u16 widx = 0;
while (widx < words) {
u8 write_opcode = EEPROM_WRITE_OPCODE_SPI;
if (e1000_spi_eeprom_ready(hw)) return -E1000_ERR_EEPROM;
e1000_standby_eeprom(hw);
cond_resched();
/* Send the WRITE ENABLE command (8 bit opcode ) */
e1000_shift_out_ee_bits(hw, EEPROM_WREN_OPCODE_SPI,
eeprom->opcode_bits);
e1000_standby_eeprom(hw);
/* Some SPI eeproms use the 8th address bit embedded in the * opcode
*/ if ((eeprom->address_bits == 8) && (offset >= 128))
write_opcode |= EEPROM_A8_OPCODE_SPI;
/* Some larger eeprom sizes are capable of a 32-byte * PAGE WRITE operation, while the smaller eeproms are * capable of an 8-byte PAGE WRITE operation. Break the * inner loop to pass new address
*/ if ((((offset + widx) * 2) % eeprom->page_size) == 0) {
e1000_standby_eeprom(hw); break;
}
}
}
return E1000_SUCCESS;
}
/** * e1000_write_eeprom_microwire - Writes a 16 bit word to a given offset in a Microwire EEPROM. * @hw: Struct containing variables accessed by shared code * @offset: offset within the EEPROM to be written to * @words: number of words to write * @data: pointer to array of 8 bit words to be written to the EEPROM
*/ static s32 e1000_write_eeprom_microwire(struct e1000_hw *hw, u16 offset,
u16 words, u16 *data)
{ struct e1000_eeprom_info *eeprom = &hw->eeprom;
u32 eecd;
u16 words_written = 0;
u16 i = 0;
/* Send the write enable command to the EEPROM (3-bit opcode plus * 6/8-bit dummy address beginning with 11). It's less work to include * the 11 of the dummy address as part of the opcode than it is to shift * it over the correct number of bits for the address. This puts the * EEPROM into write/erase mode.
*/
e1000_shift_out_ee_bits(hw, EEPROM_EWEN_OPCODE_MICROWIRE,
(u16)(eeprom->opcode_bits + 2));
/* Send the data */
e1000_shift_out_ee_bits(hw, data[words_written], 16);
/* Toggle the CS line. This in effect tells the EEPROM to * execute the previous command.
*/
e1000_standby_eeprom(hw);
/* Read DO repeatedly until it is high (equal to '1'). The * EEPROM will signal that the command has been completed by * raising the DO signal. If DO does not go high in 10 * milliseconds, then error out.
*/ for (i = 0; i < 200; i++) {
eecd = er32(EECD); if (eecd & E1000_EECD_DO) break;
udelay(50);
} if (i == 200) {
e_dbg("EEPROM Write did not complete\n"); return -E1000_ERR_EEPROM;
}
/* Recover from write */
e1000_standby_eeprom(hw);
cond_resched();
words_written++;
}
/* Send the write disable command to the EEPROM (3-bit opcode plus * 6/8-bit dummy address beginning with 10). It's less work to include * the 10 of the dummy address as part of the opcode than it is to shift * it over the correct number of bits for the address. This takes the * EEPROM out of write/erase mode.
*/
e1000_shift_out_ee_bits(hw, EEPROM_EWDS_OPCODE_MICROWIRE,
(u16)(eeprom->opcode_bits + 2));
/** * e1000_read_mac_addr - read the adapters MAC from eeprom * @hw: Struct containing variables accessed by shared code * * Reads the adapter's MAC address from the EEPROM and inverts the LSB for the * second function of dual function devices
*/
s32 e1000_read_mac_addr(struct e1000_hw *hw)
{
u16 offset;
u16 eeprom_data, i;
for (i = 0; i < NODE_ADDRESS_SIZE; i += 2) {
offset = i >> 1; if (e1000_read_eeprom(hw, offset, 1, &eeprom_data) < 0) {
e_dbg("EEPROM Read Error\n"); return -E1000_ERR_EEPROM;
}
hw->perm_mac_addr[i] = (u8)(eeprom_data & 0x00FF);
hw->perm_mac_addr[i + 1] = (u8)(eeprom_data >> 8);
}
switch (hw->mac_type) { default: break; case e1000_82546: case e1000_82546_rev_3: if (er32(STATUS) & E1000_STATUS_FUNC_1)
hw->perm_mac_addr[5] ^= 0x01; break;
}
for (i = 0; i < NODE_ADDRESS_SIZE; i++)
hw->mac_addr[i] = hw->perm_mac_addr[i]; return E1000_SUCCESS;
}
/** * e1000_init_rx_addrs - Initializes receive address filters. * @hw: Struct containing variables accessed by shared code * * Places the MAC address in receive address register 0 and clears the rest * of the receive address registers. Clears the multicast table. Assumes * the receiver is in reset when the routine is called.
*/ staticvoid e1000_init_rx_addrs(struct e1000_hw *hw)
{
u32 i;
u32 rar_num;
/* Setup the receive address. */
e_dbg("Programming MAC Address into RAR[0]\n");
e1000_rar_set(hw, hw->mac_addr, 0);
rar_num = E1000_RAR_ENTRIES;
/* Zero out the following 14 receive addresses. RAR[15] is for * manageability
*/
e_dbg("Clearing RAR[1-14]\n"); for (i = 1; i < rar_num; i++) {
E1000_WRITE_REG_ARRAY(hw, RA, (i << 1), 0);
E1000_WRITE_FLUSH();
E1000_WRITE_REG_ARRAY(hw, RA, ((i << 1) + 1), 0);
E1000_WRITE_FLUSH();
}
}
/** * e1000_hash_mc_addr - Hashes an address to determine its location in the multicast table * @hw: Struct containing variables accessed by shared code * @mc_addr: the multicast address to hash
*/
u32 e1000_hash_mc_addr(struct e1000_hw *hw, u8 *mc_addr)
{
u32 hash_value = 0;
/* The portion of the address that is used for the hash table is * determined by the mc_filter_type setting.
*/ switch (hw->mc_filter_type) { /* [0] [1] [2] [3] [4] [5] * 01 AA 00 12 34 56 * LSB MSB
*/ case 0: /* [47:36] i.e. 0x563 for above example address */
hash_value = ((mc_addr[4] >> 4) | (((u16)mc_addr[5]) << 4)); break; case 1: /* [46:35] i.e. 0xAC6 for above example address */
hash_value = ((mc_addr[4] >> 3) | (((u16)mc_addr[5]) << 5)); break; case 2: /* [45:34] i.e. 0x5D8 for above example address */
hash_value = ((mc_addr[4] >> 2) | (((u16)mc_addr[5]) << 6)); break; case 3: /* [43:32] i.e. 0x634 for above example address */
hash_value = ((mc_addr[4]) | (((u16)mc_addr[5]) << 8)); break;
}
hash_value &= 0xFFF; return hash_value;
}
/** * e1000_rar_set - Puts an ethernet address into a receive address register. * @hw: Struct containing variables accessed by shared code * @addr: Address to put into receive address register * @index: Receive address register to write
*/ void e1000_rar_set(struct e1000_hw *hw, u8 *addr, u32 index)
{
u32 rar_low, rar_high;
/* HW expects these in little endian so we reverse the byte order * from network order (big endian) to little endian
*/
rar_low = ((u32)addr[0] | ((u32)addr[1] << 8) |
((u32)addr[2] << 16) | ((u32)addr[3] << 24));
rar_high = ((u32)addr[4] | ((u32)addr[5] << 8));
/* Disable Rx and flush all Rx frames before enabling RSS to avoid Rx * unit hang. * * Description: * If there are any Rx frames queued up or otherwise present in the HW * before RSS is enabled, and then we enable RSS, the HW Rx unit will * hang. To work around this issue, we have to disable receives and * flush out all Rx frames before we enable RSS. To do so, we modify we * redirect all Rx traffic to manageability and then reset the HW. * This flushes away Rx frames, and (since the redirections to * manageability persists across resets) keeps new ones from coming in * while we work. Then, we clear the Address Valid AV bit for all MAC * addresses and undo the re-direction to manageability. * Now, frames are coming in again, but the MAC won't accept them, so * far so good. We now proceed to initialize RSS (if necessary) and * configure the Rx unit. Last, we re-enable the AV bits and continue * on our merry way.
*/ switch (hw->mac_type) { default: /* Indicate to hardware the Address is Valid. */
rar_high |= E1000_RAH_AV; break;
}
/** * e1000_write_vfta - Writes a value to the specified offset in the VLAN filter table. * @hw: Struct containing variables accessed by shared code * @offset: Offset in VLAN filter table to write * @value: Value to write into VLAN filter table
*/ void e1000_write_vfta(struct e1000_hw *hw, u32 offset, u32 value)
{
u32 temp;
for (i = 0; i < 4; i++) {
temp = (eeprom_data >> (i << 2)) & led_mask; switch (temp) { case ID_LED_ON1_DEF2: case ID_LED_ON1_ON2: case ID_LED_ON1_OFF2:
hw->ledctl_mode1 &= ~(ledctl_mask << (i << 3));
hw->ledctl_mode1 |= ledctl_on << (i << 3); break; case ID_LED_OFF1_DEF2: case ID_LED_OFF1_ON2: case ID_LED_OFF1_OFF2:
hw->ledctl_mode1 &= ~(ledctl_mask << (i << 3));
hw->ledctl_mode1 |= ledctl_off << (i << 3); break; default: /* Do nothing */ break;
} switch (temp) { case ID_LED_DEF1_ON2: case ID_LED_ON1_ON2: case ID_LED_OFF1_ON2:
hw->ledctl_mode2 &= ~(ledctl_mask << (i << 3));
hw->ledctl_mode2 |= ledctl_on << (i << 3); break; case ID_LED_DEF1_OFF2: case ID_LED_ON1_OFF2: case ID_LED_OFF1_OFF2:
hw->ledctl_mode2 &= ~(ledctl_mask << (i << 3));
hw->ledctl_mode2 |= ledctl_off << (i << 3); break; default: /* Do nothing */ break;
}
} return E1000_SUCCESS;
}
/** * e1000_setup_led * @hw: Struct containing variables accessed by shared code * * Prepares SW controlable LED for use and saves the current state of the LED.
*/
s32 e1000_setup_led(struct e1000_hw *hw)
{
u32 ledctl;
s32 ret_val = E1000_SUCCESS;
switch (hw->mac_type) { case e1000_82542_rev2_0: case e1000_82542_rev2_1: case e1000_82543: case e1000_82544: /* No setup necessary */ break; case e1000_82541: case e1000_82547: case e1000_82541_rev_2: case e1000_82547_rev_2: /* Turn off PHY Smart Power Down (if enabled) */
ret_val = e1000_read_phy_reg(hw, IGP01E1000_GMII_FIFO,
&hw->phy_spd_default); if (ret_val) return ret_val;
ret_val = e1000_write_phy_reg(hw, IGP01E1000_GMII_FIFO,
(u16)(hw->phy_spd_default &
~IGP01E1000_GMII_SPD)); if (ret_val) return ret_val;
fallthrough; default: if (hw->media_type == e1000_media_type_fiber) {
ledctl = er32(LEDCTL); /* Save current LEDCTL settings */
hw->ledctl_default = ledctl; /* Turn off LED0 */
ledctl &= ~(E1000_LEDCTL_LED0_IVRT |
E1000_LEDCTL_LED0_BLINK |
E1000_LEDCTL_LED0_MODE_MASK);
ledctl |= (E1000_LEDCTL_MODE_LED_OFF <<
E1000_LEDCTL_LED0_MODE_SHIFT);
ew32(LEDCTL, ledctl);
} elseif (hw->media_type == e1000_media_type_copper)
ew32(LEDCTL, hw->ledctl_mode1); break;
}
return E1000_SUCCESS;
}
/** * e1000_cleanup_led - Restores the saved state of the SW controlable LED. * @hw: Struct containing variables accessed by shared code
*/
s32 e1000_cleanup_led(struct e1000_hw *hw)
{
s32 ret_val = E1000_SUCCESS;
switch (hw->mac_type) { case e1000_82542_rev2_0: case e1000_82542_rev2_1: case e1000_82543: case e1000_82544: /* No cleanup necessary */ break; case e1000_82541: case e1000_82547: case e1000_82541_rev_2: case e1000_82547_rev_2: /* Turn on PHY Smart Power Down (if previously enabled) */
ret_val = e1000_write_phy_reg(hw, IGP01E1000_GMII_FIFO,
hw->phy_spd_default); if (ret_val) return ret_val;
fallthrough; default: /* Restore LEDCTL settings */
ew32(LEDCTL, hw->ledctl_default); break;
}
return E1000_SUCCESS;
}
/** * e1000_led_on - Turns on the software controllable LED * @hw: Struct containing variables accessed by shared code
*/
s32 e1000_led_on(struct e1000_hw *hw)
{
u32 ctrl = er32(CTRL);
switch (hw->mac_type) { case e1000_82542_rev2_0: case e1000_82542_rev2_1: case e1000_82543: /* Set SW Defineable Pin 0 to turn on the LED */
ctrl |= E1000_CTRL_SWDPIN0;
ctrl |= E1000_CTRL_SWDPIO0; break; case e1000_82544: if (hw->media_type == e1000_media_type_fiber) { /* Set SW Defineable Pin 0 to turn on the LED */
ctrl |= E1000_CTRL_SWDPIN0;
ctrl |= E1000_CTRL_SWDPIO0;
} else { /* Clear SW Defineable Pin 0 to turn on the LED */
ctrl &= ~E1000_CTRL_SWDPIN0;
ctrl |= E1000_CTRL_SWDPIO0;
} break; default: if (hw->media_type == e1000_media_type_fiber) { /* Clear SW Defineable Pin 0 to turn on the LED */
ctrl &= ~E1000_CTRL_SWDPIN0;
ctrl |= E1000_CTRL_SWDPIO0;
} elseif (hw->media_type == e1000_media_type_copper) {
ew32(LEDCTL, hw->ledctl_mode2); return E1000_SUCCESS;
} break;
}
ew32(CTRL, ctrl);
return E1000_SUCCESS;
}
/** * e1000_led_off - Turns off the software controllable LED * @hw: Struct containing variables accessed by shared code
*/
s32 e1000_led_off(struct e1000_hw *hw)
{
u32 ctrl = er32(CTRL);
switch (hw->mac_type) { case e1000_82542_rev2_0: case e1000_82542_rev2_1: case e1000_82543: /* Clear SW Defineable Pin 0 to turn off the LED */
ctrl &= ~E1000_CTRL_SWDPIN0;
ctrl |= E1000_CTRL_SWDPIO0; break; case e1000_82544: if (hw->media_type == e1000_media_type_fiber) { /* Clear SW Defineable Pin 0 to turn off the LED */
ctrl &= ~E1000_CTRL_SWDPIN0;
ctrl |= E1000_CTRL_SWDPIO0;
} else { /* Set SW Defineable Pin 0 to turn off the LED */
ctrl |= E1000_CTRL_SWDPIN0;
ctrl |= E1000_CTRL_SWDPIO0;
} break; default: if (hw->media_type == e1000_media_type_fiber) { /* Set SW Defineable Pin 0 to turn off the LED */
ctrl |= E1000_CTRL_SWDPIN0;
ctrl |= E1000_CTRL_SWDPIO0;
} elseif (hw->media_type == e1000_media_type_copper) {
ew32(LEDCTL, hw->ledctl_mode1); return E1000_SUCCESS;
} break;
}
/** * e1000_reset_adaptive - Resets Adaptive IFS to its default state. * @hw: Struct containing variables accessed by shared code * * Call this after e1000_init_hw. You may override the IFS defaults by setting * hw->ifs_params_forced to true. However, you must initialize hw-> * current_ifs_val, ifs_min_val, ifs_max_val, ifs_step_size, and ifs_ratio * before calling this function.
*/ void e1000_reset_adaptive(struct e1000_hw *hw)
{ if (hw->adaptive_ifs) { if (!hw->ifs_params_forced) {
hw->current_ifs_val = 0;
hw->ifs_min_val = IFS_MIN;
hw->ifs_max_val = IFS_MAX;
hw->ifs_step_size = IFS_STEP;
hw->ifs_ratio = IFS_RATIO;
}
hw->in_ifs_mode = false;
ew32(AIT, 0);
} else {
e_dbg("Not in Adaptive IFS mode!\n");
}
}
/** * e1000_update_adaptive - update adaptive IFS * @hw: Struct containing variables accessed by shared code * * Called during the callback/watchdog routine to update IFS value based on * the ratio of transmits to collisions.
*/ void e1000_update_adaptive(struct e1000_hw *hw)
{ if (hw->adaptive_ifs) { if ((hw->collision_delta * hw->ifs_ratio) > hw->tx_packet_delta) { if (hw->tx_packet_delta > MIN_NUM_XMITS) {
hw->in_ifs_mode = true; if (hw->current_ifs_val < hw->ifs_max_val) { if (hw->current_ifs_val == 0)
hw->current_ifs_val =
hw->ifs_min_val; else
hw->current_ifs_val +=
hw->ifs_step_size;
ew32(AIT, hw->current_ifs_val);
}
}
} else { if (hw->in_ifs_mode &&
(hw->tx_packet_delta <= MIN_NUM_XMITS)) {
hw->current_ifs_val = 0;
hw->in_ifs_mode = false;
ew32(AIT, 0);
}
}
} else {
e_dbg("Not in Adaptive IFS mode!\n");
}
}
/** * e1000_get_bus_info * @hw: Struct containing variables accessed by shared code * * Gets the current PCI bus type, speed, and width of the hardware
*/ void e1000_get_bus_info(struct e1000_hw *hw)
{
u32 status;
switch (hw->mac_type) { case e1000_82542_rev2_0: case e1000_82542_rev2_1:
hw->bus_type = e1000_bus_type_pci;
hw->bus_speed = e1000_bus_speed_unknown;
hw->bus_width = e1000_bus_width_unknown; break; default:
status = er32(STATUS);
hw->bus_type = (status & E1000_STATUS_PCIX_MODE) ?
e1000_bus_type_pcix : e1000_bus_type_pci;
/** * e1000_write_reg_io * @hw: Struct containing variables accessed by shared code * @offset: offset to write to * @value: value to write * * Writes a value to one of the devices registers using port I/O (as opposed to * memory mapped I/O). Only 82544 and newer devices support port I/O.
*/ staticvoid e1000_write_reg_io(struct e1000_hw *hw, u32 offset, u32 value)
{ unsignedlong io_addr = hw->io_base; unsignedlong io_data = hw->io_base + 4;
/** * e1000_get_cable_length - Estimates the cable length. * @hw: Struct containing variables accessed by shared code * @min_length: The estimated minimum length * @max_length: The estimated maximum length * * returns: - E1000_ERR_XXX * E1000_SUCCESS * * This function always returns a ranged length (minimum & maximum). * So for M88 phy's, this function interprets the one value returned from the * register to the minimum and maximum range. * For IGP phy's, the function calculates the range by the AGC registers.
*/ static s32 e1000_get_cable_length(struct e1000_hw *hw, u16 *min_length,
u16 *max_length)
{
s32 ret_val;
u16 agc_value = 0;
u16 i, phy_data;
u16 cable_length;
*min_length = *max_length = 0;
/* Use old method for Phy older than IGP */ if (hw->phy_type == e1000_phy_m88) {
ret_val = e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_STATUS,
&phy_data); if (ret_val) return ret_val;
cable_length = FIELD_GET(M88E1000_PSSR_CABLE_LENGTH, phy_data);
/* Convert the enum value to ranged values */ switch (cable_length) { case e1000_cable_length_50:
*min_length = 0;
*max_length = e1000_igp_cable_length_50; break; case e1000_cable_length_50_80:
*min_length = e1000_igp_cable_length_50;
*max_length = e1000_igp_cable_length_80; break; case e1000_cable_length_80_110:
*min_length = e1000_igp_cable_length_80;
*max_length = e1000_igp_cable_length_110; break; case e1000_cable_length_110_140:
*min_length = e1000_igp_cable_length_110;
*max_length = e1000_igp_cable_length_140; break; case e1000_cable_length_140:
*min_length = e1000_igp_cable_length_140;
*max_length = e1000_igp_cable_length_170; break; default: return -E1000_ERR_PHY;
}
} elseif (hw->phy_type == e1000_phy_igp) { /* For IGP PHY */
u16 cur_agc_value;
u16 min_agc_value = IGP01E1000_AGC_LENGTH_TABLE_SIZE; staticconst u16 agc_reg_array[IGP01E1000_PHY_CHANNEL_NUM] = {
IGP01E1000_PHY_AGC_A,
IGP01E1000_PHY_AGC_B,
IGP01E1000_PHY_AGC_C,
IGP01E1000_PHY_AGC_D
}; /* Read the AGC registers for all channels */ for (i = 0; i < IGP01E1000_PHY_CHANNEL_NUM; i++) {
ret_val =
e1000_read_phy_reg(hw, agc_reg_array[i], &phy_data); if (ret_val) return ret_val;
/* Remove the minimal AGC result for length < 50m */ if (agc_value <
IGP01E1000_PHY_CHANNEL_NUM * e1000_igp_cable_length_50) {
agc_value -= min_agc_value;
/* Get the average length of the remaining 3 channels */
agc_value /= (IGP01E1000_PHY_CHANNEL_NUM - 1);
} else { /* Get the average length of all the 4 channels. */
agc_value /= IGP01E1000_PHY_CHANNEL_NUM;
}
/* Set the range of the calculated length. */
*min_length = ((e1000_igp_cable_length_table[agc_value] -
IGP01E1000_AGC_RANGE) > 0) ?
(e1000_igp_cable_length_table[agc_value] -
IGP01E1000_AGC_RANGE) : 0;
*max_length = e1000_igp_cable_length_table[agc_value] +
IGP01E1000_AGC_RANGE;
}
return E1000_SUCCESS;
}
/** * e1000_check_polarity - Check the cable polarity * @hw: Struct containing variables accessed by shared code * @polarity: output parameter : 0 - Polarity is not reversed * 1 - Polarity is reversed. * * returns: - E1000_ERR_XXX * E1000_SUCCESS * * For phy's older than IGP, this function simply reads the polarity bit in the * Phy Status register. For IGP phy's, this bit is valid only if link speed is * 10 Mbps. If the link speed is 100 Mbps there is no polarity so this bit will * return 0. If the link speed is 1000 Mbps the polarity status is in the * IGP01E1000_PHY_PCS_INIT_REG.
*/ static s32 e1000_check_polarity(struct e1000_hw *hw,
e1000_rev_polarity *polarity)
{
s32 ret_val;
u16 phy_data;
if (hw->phy_type == e1000_phy_m88) { /* return the Polarity bit in the Status register. */
ret_val = e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_STATUS,
&phy_data); if (ret_val) return ret_val;
*polarity = FIELD_GET(M88E1000_PSSR_REV_POLARITY, phy_data) ?
e1000_rev_polarity_reversed : e1000_rev_polarity_normal;
} elseif (hw->phy_type == e1000_phy_igp) { /* Read the Status register to check the speed */
ret_val = e1000_read_phy_reg(hw, IGP01E1000_PHY_PORT_STATUS,
&phy_data); if (ret_val) return ret_val;
/* If speed is 1000 Mbps, must read the * IGP01E1000_PHY_PCS_INIT_REG to find the polarity status
*/ if ((phy_data & IGP01E1000_PSSR_SPEED_MASK) ==
IGP01E1000_PSSR_SPEED_1000MBPS) { /* Read the GIG initialization PCS register (0x00B4) */
ret_val =
e1000_read_phy_reg(hw, IGP01E1000_PHY_PCS_INIT_REG,
&phy_data); if (ret_val) return ret_val;
/* Check the polarity bits */
*polarity = (phy_data & IGP01E1000_PHY_POLARITY_MASK) ?
e1000_rev_polarity_reversed :
e1000_rev_polarity_normal;
} else { /* For 10 Mbps, read the polarity bit in the status * register. (for 100 Mbps this bit is always 0)
*/
*polarity =
(phy_data & IGP01E1000_PSSR_POLARITY_REVERSED) ?
e1000_rev_polarity_reversed :
e1000_rev_polarity_normal;
}
} return E1000_SUCCESS;
}
/** * e1000_check_downshift - Check if Downshift occurred * @hw: Struct containing variables accessed by shared code * * returns: - E1000_ERR_XXX * E1000_SUCCESS * * For phy's older than IGP, this function reads the Downshift bit in the Phy * Specific Status register. For IGP phy's, it reads the Downgrade bit in the * Link Health register. In IGP this bit is latched high, so the driver must * read it immediately after link is established.
*/ static s32 e1000_check_downshift(struct e1000_hw *hw)
{
s32 ret_val;
u16 phy_data;
if (hw->phy_type == e1000_phy_igp) {
ret_val = e1000_read_phy_reg(hw, IGP01E1000_PHY_LINK_HEALTH,
&phy_data); if (ret_val) return ret_val;
ret_val = e1000_get_cable_length(hw, &min_length, &max_length); if (ret_val) return ret_val;
if (hw->dsp_config_state != e1000_dsp_config_enabled) return 0;
if (min_length >= e1000_igp_cable_length_50) { for (i = 0; i < IGP01E1000_PHY_CHANNEL_NUM; i++) {
ret_val = e1000_read_phy_reg(hw, dsp_reg_array[i],
&phy_data); if (ret_val) return ret_val;
if (idle_errs)
ffe_idle_err_timeout =
FFE_IDLE_ERR_COUNT_TIMEOUT_100;
}
}
return 0;
}
/** * e1000_config_dsp_after_link_change * @hw: Struct containing variables accessed by shared code * @link_up: was link up at the time this was called * * returns: - E1000_ERR_PHY if fail to read/write the PHY * E1000_SUCCESS at any other case. * * 82541_rev_2 & 82547_rev_2 have the capability to configure the DSP when a * gigabit link is achieved to improve link quality.
*/
if (hw->phy_type != e1000_phy_igp) return E1000_SUCCESS;
if (link_up) {
ret_val = e1000_get_speed_and_duplex(hw, &speed, &duplex); if (ret_val) {
e_dbg("Error getting link speed and duplex\n"); return ret_val;
}
if (speed == SPEED_1000) {
ret_val = e1000_1000Mb_check_cable_length(hw); if (ret_val) return ret_val;
}
} else { if (hw->dsp_config_state == e1000_dsp_config_activated) { /* Save off the current value of register 0x2F5B to be * restored at the end of the routines.
*/
ret_val =
e1000_read_phy_reg(hw, 0x2F5B, &phy_saved_data);
if (hw->ffe_config_state == e1000_ffe_config_active) { /* Save off the current value of register 0x2F5B to be * restored at the end of the routines.
*/
ret_val =
e1000_read_phy_reg(hw, 0x2F5B, &phy_saved_data);
/** * e1000_set_phy_mode - Set PHY to class A mode * @hw: Struct containing variables accessed by shared code * * Assumes the following operations will follow to enable the new class mode. * 1. Do a PHY soft reset * 2. Restart auto-negotiation or force link.
*/ static s32 e1000_set_phy_mode(struct e1000_hw *hw)
{
s32 ret_val;
u16 eeprom_data;
if ((hw->mac_type == e1000_82545_rev_3) &&
(hw->media_type == e1000_media_type_copper)) {
ret_val =
e1000_read_eeprom(hw, EEPROM_PHY_CLASS_WORD, 1,
&eeprom_data); if (ret_val) return ret_val;
if ((eeprom_data != EEPROM_RESERVED_WORD) &&
(eeprom_data & EEPROM_PHY_CLASS_A)) {
ret_val =
e1000_write_phy_reg(hw, M88E1000_PHY_PAGE_SELECT,
0x000B); if (ret_val) return ret_val;
ret_val =
e1000_write_phy_reg(hw, M88E1000_PHY_GEN_CONTROL,
0x8104); if (ret_val) return ret_val;
hw->phy_reset_disable = false;
}
}
return E1000_SUCCESS;
}
/** * e1000_set_d3_lplu_state - set d3 link power state * @hw: Struct containing variables accessed by shared code * @active: true to enable lplu false to disable lplu. * * This function sets the lplu state according to the active flag. When * activating lplu this function also disables smart speed and vise versa. * lplu will not be activated unless the device autonegotiation advertisement * meets standards of either 10 or 10/100 or 10/100/1000 at all duplexes. * * returns: - E1000_ERR_PHY if fail to read/write the PHY * E1000_SUCCESS at any other case.
*/ static s32 e1000_set_d3_lplu_state(struct e1000_hw *hw, bool active)
{
s32 ret_val;
u16 phy_data;
if (hw->phy_type != e1000_phy_igp) return E1000_SUCCESS;
/* During driver activity LPLU should not be used or it will attain link * from the lowest speeds starting from 10Mbps. The capability is used * for Dx transitions and states
*/ if (hw->mac_type == e1000_82541_rev_2 ||
hw->mac_type == e1000_82547_rev_2) {
ret_val =
e1000_read_phy_reg(hw, IGP01E1000_GMII_FIFO, &phy_data); if (ret_val) return ret_val;
}
if (!active) { if (hw->mac_type == e1000_82541_rev_2 ||
hw->mac_type == e1000_82547_rev_2) {
phy_data &= ~IGP01E1000_GMII_FLEX_SPD;
ret_val =
e1000_write_phy_reg(hw, IGP01E1000_GMII_FIFO,
phy_data); if (ret_val) return ret_val;
}
/* LPLU and SmartSpeed are mutually exclusive. LPLU is used * during Dx states where the power conservation is most * important. During driver activity we should enable * SmartSpeed, so performance is maintained.
*/ if (hw->smart_speed == e1000_smart_speed_on) {
ret_val =
e1000_read_phy_reg(hw, IGP01E1000_PHY_PORT_CONFIG,
&phy_data); if (ret_val) return ret_val;
/* When LPLU is enabled we should disable SmartSpeed */
ret_val =
e1000_read_phy_reg(hw, IGP01E1000_PHY_PORT_CONFIG,
&phy_data); if (ret_val) return ret_val;
ret_val =
e1000_write_phy_reg(hw, M88E1000_PHY_PAGE_SELECT, default_page); if (ret_val) return ret_val;
return E1000_SUCCESS;
}
/** * e1000_enable_mng_pass_thru - check for bmc pass through * @hw: Struct containing variables accessed by shared code * * Verifies the hardware needs to allow ARPs to be processed by the host * returns: - true/false
*/
u32 e1000_enable_mng_pass_thru(struct e1000_hw *hw)
{
u32 manc;
if (hw->asf_firmware_present) {
manc = er32(MANC);
/* Polarity reversal workaround for forced 10F/10H links. */
/* Disable the transmitter on the PHY */
ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_PAGE_SELECT, 0x0019); if (ret_val) return ret_val;
ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_GEN_CONTROL, 0xFFFF); if (ret_val) return ret_val;
ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_PAGE_SELECT, 0x0000); if (ret_val) return ret_val;
/* This loop will early-out if the NO link condition has been met. */ for (i = PHY_FORCE_TIME; i > 0; i--) { /* Read the MII Status Register and wait for Link Status bit * to be clear.
*/
ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg); if (ret_val) return ret_val;
ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg); if (ret_val) return ret_val;
if ((mii_status_reg & ~MII_SR_LINK_STATUS) == 0) break;
msleep(100);
}
/* Recommended delay time after link has been lost */
msleep(1000);
/* Now we will re-enable th transmitter on the PHY */
ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_PAGE_SELECT, 0x0019); if (ret_val) return ret_val;
msleep(50);
ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_GEN_CONTROL, 0xFFF0); if (ret_val) return ret_val;
msleep(50);
ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_GEN_CONTROL, 0xFF00); if (ret_val) return ret_val;
msleep(50);
ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_GEN_CONTROL, 0x0000); if (ret_val) return ret_val;
ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_PAGE_SELECT, 0x0000); if (ret_val) return ret_val;
/* This loop will early-out if the link condition has been met. */ for (i = PHY_FORCE_TIME; i > 0; i--) { /* Read the MII Status Register and wait for Link Status bit * to be set.
*/
ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg); if (ret_val) return ret_val;
ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg); if (ret_val) return ret_val;
if (mii_status_reg & MII_SR_LINK_STATUS) break;
msleep(100);
} return E1000_SUCCESS;
}
/** * e1000_get_auto_rd_done * @hw: Struct containing variables accessed by shared code * * Check for EEPROM Auto Read bit done. * returns: - E1000_ERR_RESET if fail to reset MAC * E1000_SUCCESS at any other case.
*/ static s32 e1000_get_auto_rd_done(struct e1000_hw *hw)
{
msleep(5); return E1000_SUCCESS;
}
/** * e1000_get_phy_cfg_done * @hw: Struct containing variables accessed by shared code * * Checks if the PHY configuration is done * returns: - E1000_ERR_RESET if fail to reset MAC * E1000_SUCCESS at any other case.
*/ static s32 e1000_get_phy_cfg_done(struct e1000_hw *hw)
{
msleep(10); return E1000_SUCCESS;
}
Messung V0.5 in Prozent
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(vorverarbeitet am 2026-04-28)
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Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung und die Messung sind noch experimentell.