/*-
 * Copyright 2021 Intel Corp
 * Copyright 2021 Rubicon Communications, LLC (Netgate)
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <sys/cdefs.h>
#include "igc_api.h"

static s32 igc_init_nvm_params_i225(struct igc_hw *hw);
static s32 igc_init_mac_params_i225(struct igc_hw *hw);
static s32 igc_init_phy_params_i225(struct igc_hw *hw);
static s32 igc_reset_hw_i225(struct igc_hw *hw);
static s32 igc_acquire_nvm_i225(struct igc_hw *hw);
static void igc_release_nvm_i225(struct igc_hw *hw);
static s32 igc_get_hw_semaphore_i225(struct igc_hw *hw);
static s32 __igc_write_nvm_srwr(struct igc_hw *hw, u16 offset, u16 words,
                                  u16 *data);
static s32 igc_pool_flash_update_done_i225(struct igc_hw *hw);

/**
 *  igc_init_nvm_params_i225 - Init NVM func ptrs.
 *  @hw: pointer to the HW structure
 **/
static s32 igc_init_nvm_params_i225(struct igc_hw *hw)
{
        struct igc_nvm_info *nvm = &hw->nvm;
        u32 eecd = IGC_READ_REG(hw, IGC_EECD);
        u16 size;

        DEBUGFUNC("igc_init_nvm_params_i225");

        size = (u16)((eecd & IGC_EECD_SIZE_EX_MASK) >>
                     IGC_EECD_SIZE_EX_SHIFT);
        /*
         * Added to a constant, "size" becomes the left-shift value
         * for setting word_size.
         */
        size += NVM_WORD_SIZE_BASE_SHIFT;

        /* Just in case size is out of range, cap it to the largest
         * EEPROM size supported
         */
        if (size > 15)
                size = 15;

        nvm->word_size = 1 << size;
        nvm->opcode_bits = 8;
        nvm->delay_usec = 1;
        nvm->type = igc_nvm_eeprom_spi;


        nvm->page_size = eecd & IGC_EECD_ADDR_BITS ? 32 : 8;
        nvm->address_bits = eecd & IGC_EECD_ADDR_BITS ?
                            16 : 8;

        if (nvm->word_size == (1 << 15))
                nvm->page_size = 128;

        nvm->ops.acquire = igc_acquire_nvm_i225;
        nvm->ops.release = igc_release_nvm_i225;
        if (igc_get_flash_presence_i225(hw)) {
                hw->nvm.type = igc_nvm_flash_hw;
                nvm->ops.read    = igc_read_nvm_srrd_i225;
                nvm->ops.write   = igc_write_nvm_srwr_i225;
                nvm->ops.validate = igc_validate_nvm_checksum_i225;
                nvm->ops.update   = igc_update_nvm_checksum_i225;
        } else {
                hw->nvm.type = igc_nvm_invm;
                nvm->ops.write    = igc_null_write_nvm;
                nvm->ops.validate = igc_null_ops_generic;
                nvm->ops.update   = igc_null_ops_generic;
        }

        return IGC_SUCCESS;
}

/**
 *  igc_init_mac_params_i225 - Init MAC func ptrs.
 *  @hw: pointer to the HW structure
 **/
static s32 igc_init_mac_params_i225(struct igc_hw *hw)
{
        struct igc_mac_info *mac = &hw->mac;
        struct igc_dev_spec_i225 *dev_spec = &hw->dev_spec._i225;

        DEBUGFUNC("igc_init_mac_params_i225");

        /* Initialize function pointer */
        igc_init_mac_ops_generic(hw);

        /* Set media type */
        hw->phy.media_type = igc_media_type_copper;
        /* Set mta register count */
        mac->mta_reg_count = 128;
        /* Set rar entry count */
        mac->rar_entry_count = IGC_RAR_ENTRIES_BASE;

        /* reset */
        mac->ops.reset_hw = igc_reset_hw_i225;
        /* hw initialization */
        mac->ops.init_hw = igc_init_hw_i225;
        /* link setup */
        mac->ops.setup_link = igc_setup_link_generic;
        /* check for link */
        mac->ops.check_for_link = igc_check_for_link_i225;
        /* link info */
        mac->ops.get_link_up_info = igc_get_speed_and_duplex_copper_generic;
        /* acquire SW_FW sync */
        mac->ops.acquire_swfw_sync = igc_acquire_swfw_sync_i225;
        /* release SW_FW sync */
        mac->ops.release_swfw_sync = igc_release_swfw_sync_i225;

        /* Allow a single clear of the SW semaphore on I225 */
        dev_spec->clear_semaphore_once = true;
        mac->ops.setup_physical_interface = igc_setup_copper_link_i225;

        /* Set if part includes ASF firmware */
        mac->asf_firmware_present = true;

        /* multicast address update */
        mac->ops.update_mc_addr_list = igc_update_mc_addr_list_generic;

        mac->ops.write_vfta = igc_write_vfta_generic;

        return IGC_SUCCESS;
}

/**
 *  igc_init_phy_params_i225 - Init PHY func ptrs.
 *  @hw: pointer to the HW structure
 **/
static s32 igc_init_phy_params_i225(struct igc_hw *hw)
{
        struct igc_phy_info *phy = &hw->phy;
        s32 ret_val = IGC_SUCCESS;

        DEBUGFUNC("igc_init_phy_params_i225");


        if (hw->phy.media_type != igc_media_type_copper) {
                phy->type = igc_phy_none;
                goto out;
        }

        phy->ops.power_up   = igc_power_up_phy_copper;
        phy->ops.power_down = igc_power_down_phy_copper_base;

        phy->autoneg_mask = AUTONEG_ADVERTISE_SPEED_DEFAULT_2500;

        phy->reset_delay_us     = 100;

        phy->ops.acquire        = igc_acquire_phy_base;
        phy->ops.check_reset_block = igc_check_reset_block_generic;
        phy->ops.release        = igc_release_phy_base;
        phy->ops.reset          = igc_phy_hw_reset_generic;
        phy->ops.read_reg       = igc_read_phy_reg_gpy;
        phy->ops.write_reg      = igc_write_phy_reg_gpy;

        /* Make sure the PHY is in a good state. Several people have reported
         * firmware leaving the PHY's page select register set to something
         * other than the default of zero, which causes the PHY ID read to
         * access something other than the intended register.
         */
        ret_val = hw->phy.ops.reset(hw);
        if (ret_val)
                goto out;

        ret_val = igc_get_phy_id(hw);
        phy->type = igc_phy_i225;

out:
        return ret_val;
}

/**
 *  igc_reset_hw_i225 - Reset hardware
 *  @hw: pointer to the HW structure
 *
 *  This resets the hardware into a known state.
 **/
static s32 igc_reset_hw_i225(struct igc_hw *hw)
{
        u32 ctrl;
        s32 ret_val;

        DEBUGFUNC("igc_reset_hw_i225");

        /*
         * Prevent the PCI-E bus from sticking if there is no TLP connection
         * on the last TLP read/write transaction when MAC is reset.
         */
        ret_val = igc_disable_pcie_master_generic(hw);
        if (ret_val)
                DEBUGOUT("PCI-E Master disable polling has failed.\n");

        DEBUGOUT("Masking off all interrupts\n");
        IGC_WRITE_REG(hw, IGC_IMC, 0xffffffff);

        IGC_WRITE_REG(hw, IGC_RCTL, 0);
        IGC_WRITE_REG(hw, IGC_TCTL, IGC_TCTL_PSP);
        IGC_WRITE_FLUSH(hw);

        msec_delay(10);

        ctrl = IGC_READ_REG(hw, IGC_CTRL);

        DEBUGOUT("Issuing a global reset to MAC\n");
        IGC_WRITE_REG(hw, IGC_CTRL, ctrl | IGC_CTRL_DEV_RST);

        ret_val = igc_get_auto_rd_done_generic(hw);
        if (ret_val) {
                /*
                 * When auto config read does not complete, do not
                 * return with an error. This can happen in situations
                 * where there is no eeprom and prevents getting link.
                 */
                DEBUGOUT("Auto Read Done did not complete\n");
        }

        /* Clear any pending interrupt events. */
        IGC_WRITE_REG(hw, IGC_IMC, 0xffffffff);
        IGC_READ_REG(hw, IGC_ICR);

        /* Install any alternate MAC address into RAR0 */
        ret_val = igc_check_alt_mac_addr_generic(hw);

        return ret_val;
}

/* igc_acquire_nvm_i225 - Request for access to EEPROM
 * @hw: pointer to the HW structure
 *
 * Acquire the necessary semaphores for exclusive access to the EEPROM.
 * Set the EEPROM access request bit and wait for EEPROM access grant bit.
 * Return successful if access grant bit set, else clear the request for
 * EEPROM access and return -IGC_ERR_NVM (-1).
 */
static s32 igc_acquire_nvm_i225(struct igc_hw *hw)
{
        s32 ret_val;

        DEBUGFUNC("igc_acquire_nvm_i225");

        ret_val = igc_acquire_swfw_sync_i225(hw, IGC_SWFW_EEP_SM);

        return ret_val;
}

/* igc_release_nvm_i225 - Release exclusive access to EEPROM
 * @hw: pointer to the HW structure
 *
 * Stop any current commands to the EEPROM and clear the EEPROM request bit,
 * then release the semaphores acquired.
 */
static void igc_release_nvm_i225(struct igc_hw *hw)
{
        DEBUGFUNC("igc_release_nvm_i225");

        igc_release_swfw_sync_i225(hw, IGC_SWFW_EEP_SM);
}

/* igc_acquire_swfw_sync_i225 - Acquire SW/FW semaphore
 * @hw: pointer to the HW structure
 * @mask: specifies which semaphore to acquire
 *
 * Acquire the SW/FW semaphore to access the PHY or NVM.  The mask
 * will also specify which port we're acquiring the lock for.
 */
s32 igc_acquire_swfw_sync_i225(struct igc_hw *hw, u16 mask)
{
        u32 swfw_sync;
        u32 swmask = mask;
        u32 fwmask = mask << 16;
        s32 ret_val = IGC_SUCCESS;
        s32 i = 0, timeout = 200; /* FIXME: find real value to use here */

        DEBUGFUNC("igc_acquire_swfw_sync_i225");

        while (i < timeout) {
                if (igc_get_hw_semaphore_i225(hw)) {
                        ret_val = -IGC_ERR_SWFW_SYNC;
                        goto out;
                }

                swfw_sync = IGC_READ_REG(hw, IGC_SW_FW_SYNC);
                if (!(swfw_sync & (fwmask | swmask)))
                        break;

                /* Firmware currently using resource (fwmask)
                 * or other software thread using resource (swmask)
                 */
                igc_put_hw_semaphore_generic(hw);
                msec_delay_irq(5);
                i++;
        }

        if (i == timeout) {
                DEBUGOUT("Driver can't access resource, SW_FW_SYNC timeout.\n");
                ret_val = -IGC_ERR_SWFW_SYNC;
                goto out;
        }

        swfw_sync |= swmask;
        IGC_WRITE_REG(hw, IGC_SW_FW_SYNC, swfw_sync);

        igc_put_hw_semaphore_generic(hw);

out:
        return ret_val;
}

/* igc_release_swfw_sync_i225 - Release SW/FW semaphore
 * @hw: pointer to the HW structure
 * @mask: specifies which semaphore to acquire
 *
 * Release the SW/FW semaphore used to access the PHY or NVM.  The mask
 * will also specify which port we're releasing the lock for.
 */
void igc_release_swfw_sync_i225(struct igc_hw *hw, u16 mask)
{
        u32 swfw_sync;

        DEBUGFUNC("igc_release_swfw_sync_i225");

        while (igc_get_hw_semaphore_i225(hw) != IGC_SUCCESS)
                ; /* Empty */

        swfw_sync = IGC_READ_REG(hw, IGC_SW_FW_SYNC);
        swfw_sync &= ~mask;
        IGC_WRITE_REG(hw, IGC_SW_FW_SYNC, swfw_sync);

        igc_put_hw_semaphore_generic(hw);
}

/*
 * igc_setup_copper_link_i225 - Configure copper link settings
 * @hw: pointer to the HW structure
 *
 * Configures the link for auto-neg or forced speed and duplex.  Then we check
 * for link, once link is established calls to configure collision distance
 * and flow control are called.
 */
s32 igc_setup_copper_link_i225(struct igc_hw *hw)
{
        u32 phpm_reg;
        s32 ret_val;
        u32 ctrl;

        DEBUGFUNC("igc_setup_copper_link_i225");

        ctrl = IGC_READ_REG(hw, IGC_CTRL);
        ctrl |= IGC_CTRL_SLU;
        ctrl &= ~(IGC_CTRL_FRCSPD | IGC_CTRL_FRCDPX);
        IGC_WRITE_REG(hw, IGC_CTRL, ctrl);

        phpm_reg = IGC_READ_REG(hw, IGC_I225_PHPM);
        phpm_reg &= ~IGC_I225_PHPM_GO_LINKD;
        IGC_WRITE_REG(hw, IGC_I225_PHPM, phpm_reg);

        ret_val = igc_setup_copper_link_generic(hw);

        return ret_val;
}

/* igc_get_hw_semaphore_i225 - Acquire hardware semaphore
 * @hw: pointer to the HW structure
 *
 * Acquire the HW semaphore to access the PHY or NVM
 */
static s32 igc_get_hw_semaphore_i225(struct igc_hw *hw)
{
        u32 swsm;
        s32 timeout = hw->nvm.word_size + 1;
        s32 i = 0;

        DEBUGFUNC("igc_get_hw_semaphore_i225");

        /* Get the SW semaphore */
        while (i < timeout) {
                swsm = IGC_READ_REG(hw, IGC_SWSM);
                if (!(swsm & IGC_SWSM_SMBI))
                        break;

                usec_delay(50);
                i++;
        }

        if (i == timeout) {
                /* In rare circumstances, the SW semaphore may already be held
                 * unintentionally. Clear the semaphore once before giving up.
                 */
                if (hw->dev_spec._i225.clear_semaphore_once) {
                        hw->dev_spec._i225.clear_semaphore_once = false;
                        igc_put_hw_semaphore_generic(hw);
                        for (i = 0; i < timeout; i++) {
                                swsm = IGC_READ_REG(hw, IGC_SWSM);
                                if (!(swsm & IGC_SWSM_SMBI))
                                        break;

                                usec_delay(50);
                        }
                }

                /* If we do not have the semaphore here, we have to give up. */
                if (i == timeout) {
                        DEBUGOUT("Driver can't access device -\n");
                        DEBUGOUT("SMBI bit is set.\n");
                        return -IGC_ERR_NVM;
                }
        }

        /* Get the FW semaphore. */
        for (i = 0; i < timeout; i++) {
                swsm = IGC_READ_REG(hw, IGC_SWSM);
                IGC_WRITE_REG(hw, IGC_SWSM, swsm | IGC_SWSM_SWESMBI);

                /* Semaphore acquired if bit latched */
                if (IGC_READ_REG(hw, IGC_SWSM) & IGC_SWSM_SWESMBI)
                        break;

                usec_delay(50);
        }

        if (i == timeout) {
                /* Release semaphores */
                igc_put_hw_semaphore_generic(hw);
                DEBUGOUT("Driver can't access the NVM\n");
                return -IGC_ERR_NVM;
        }

        return IGC_SUCCESS;
}

/* igc_read_nvm_srrd_i225 - Reads Shadow Ram using EERD register
 * @hw: pointer to the HW structure
 * @offset: offset of word in the Shadow Ram to read
 * @words: number of words to read
 * @data: word read from the Shadow Ram
 *
 * Reads a 16 bit word from the Shadow Ram using the EERD register.
 * Uses necessary synchronization semaphores.
 */
s32 igc_read_nvm_srrd_i225(struct igc_hw *hw, u16 offset, u16 words,
                             u16 *data)
{
        s32 status = IGC_SUCCESS;
        u16 i, count;

        DEBUGFUNC("igc_read_nvm_srrd_i225");

        /* We cannot hold synchronization semaphores for too long,
         * because of forceful takeover procedure. However it is more efficient
         * to read in bursts than synchronizing access for each word.
         */
        for (i = 0; i < words; i += IGC_EERD_EEWR_MAX_COUNT) {
                count = (words - i) / IGC_EERD_EEWR_MAX_COUNT > 0 ?
                        IGC_EERD_EEWR_MAX_COUNT : (words - i);
                if (hw->nvm.ops.acquire(hw) == IGC_SUCCESS) {
                        status = igc_read_nvm_eerd(hw, offset, count,
                                                     data + i);
                        hw->nvm.ops.release(hw);
                } else {
                        status = IGC_ERR_SWFW_SYNC;
                }

                if (status != IGC_SUCCESS)
                        break;
        }

        return status;
}

/* igc_write_nvm_srwr_i225 - Write to Shadow RAM using EEWR
 * @hw: pointer to the HW structure
 * @offset: offset within the Shadow RAM to be written to
 * @words: number of words to write
 * @data: 16 bit word(s) to be written to the Shadow RAM
 *
 * Writes data to Shadow RAM at offset using EEWR register.
 *
 * If igc_update_nvm_checksum is not called after this function , the
 * data will not be committed to FLASH and also Shadow RAM will most likely
 * contain an invalid checksum.
 *
 * If error code is returned, data and Shadow RAM may be inconsistent - buffer
 * partially written.
 */
s32 igc_write_nvm_srwr_i225(struct igc_hw *hw, u16 offset, u16 words,
                              u16 *data)
{
        s32 status = IGC_SUCCESS;
        u16 i, count;

        DEBUGFUNC("igc_write_nvm_srwr_i225");

        /* We cannot hold synchronization semaphores for too long,
         * because of forceful takeover procedure. However it is more efficient
         * to write in bursts than synchronizing access for each word.
         */
        for (i = 0; i < words; i += IGC_EERD_EEWR_MAX_COUNT) {
                count = (words - i) / IGC_EERD_EEWR_MAX_COUNT > 0 ?
                        IGC_EERD_EEWR_MAX_COUNT : (words - i);
                if (hw->nvm.ops.acquire(hw) == IGC_SUCCESS) {
                        status = __igc_write_nvm_srwr(hw, offset, count,
                                                        data + i);
                        hw->nvm.ops.release(hw);
                } else {
                        status = IGC_ERR_SWFW_SYNC;
                }

                if (status != IGC_SUCCESS)
                        break;
        }

        return status;
}

/* __igc_write_nvm_srwr - Write to Shadow Ram using EEWR
 * @hw: pointer to the HW structure
 * @offset: offset within the Shadow Ram to be written to
 * @words: number of words to write
 * @data: 16 bit word(s) to be written to the Shadow Ram
 *
 * Writes data to Shadow Ram at offset using EEWR register.
 *
 * If igc_update_nvm_checksum is not called after this function , the
 * Shadow Ram will most likely contain an invalid checksum.
 */
static s32 __igc_write_nvm_srwr(struct igc_hw *hw, u16 offset, u16 words,
                                  u16 *data)
{
        struct igc_nvm_info *nvm = &hw->nvm;
        u32 i, k, eewr = 0;
        u32 attempts = 100000;
        s32 ret_val = IGC_SUCCESS;

        DEBUGFUNC("__igc_write_nvm_srwr");

        /* A check for invalid values:  offset too large, too many words,
         * too many words for the offset, and not enough words.
         */
        if ((offset >= nvm->word_size) || (words > (nvm->word_size - offset)) ||
            (words == 0)) {
                DEBUGOUT("nvm parameter(s) out of bounds\n");
                ret_val = -IGC_ERR_NVM;
                goto out;
        }

        for (i = 0; i < words; i++) {
                eewr = ((offset + i) << IGC_NVM_RW_ADDR_SHIFT) |
                        (data[i] << IGC_NVM_RW_REG_DATA) |
                        IGC_NVM_RW_REG_START;

                IGC_WRITE_REG(hw, IGC_SRWR, eewr);

                for (k = 0; k < attempts; k++) {
                        if (IGC_NVM_RW_REG_DONE &
                            IGC_READ_REG(hw, IGC_SRWR)) {
                                ret_val = IGC_SUCCESS;
                                break;
                        }
                        usec_delay(5);
                }

                if (ret_val != IGC_SUCCESS) {
                        DEBUGOUT("Shadow RAM write EEWR timed out\n");
                        break;
                }
        }

out:
        return ret_val;
}

/* igc_validate_nvm_checksum_i225 - Validate EEPROM checksum
 * @hw: pointer to the HW structure
 *
 * Calculates the EEPROM checksum by reading/adding each word of the EEPROM
 * and then verifies that the sum of the EEPROM is equal to 0xBABA.
 */
s32 igc_validate_nvm_checksum_i225(struct igc_hw *hw)
{
        s32 status = IGC_SUCCESS;
        s32 (*read_op_ptr)(struct igc_hw *, u16, u16, u16 *);

        DEBUGFUNC("igc_validate_nvm_checksum_i225");

        if (hw->nvm.ops.acquire(hw) == IGC_SUCCESS) {
                /* Replace the read function with semaphore grabbing with
                 * the one that skips this for a while.
                 * We have semaphore taken already here.
                 */
                read_op_ptr = hw->nvm.ops.read;
                hw->nvm.ops.read = igc_read_nvm_eerd;

                status = igc_validate_nvm_checksum_generic(hw);

                /* Revert original read operation. */
                hw->nvm.ops.read = read_op_ptr;

                hw->nvm.ops.release(hw);
        } else {
                status = IGC_ERR_SWFW_SYNC;
        }

        return status;
}

/* igc_update_nvm_checksum_i225 - Update EEPROM checksum
 * @hw: pointer to the HW structure
 *
 * Updates the EEPROM checksum by reading/adding each word of the EEPROM
 * up to the checksum.  Then calculates the EEPROM checksum and writes the
 * value to the EEPROM. Next commit EEPROM data onto the Flash.
 */
s32 igc_update_nvm_checksum_i225(struct igc_hw *hw)
{
        s32 ret_val;
        u16 checksum = 0;
        u16 i, nvm_data;

        DEBUGFUNC("igc_update_nvm_checksum_i225");

        /* Read the first word from the EEPROM. If this times out or fails, do
         * not continue or we could be in for a very long wait while every
         * EEPROM read fails
         */
        ret_val = igc_read_nvm_eerd(hw, 0, 1, &nvm_data);
        if (ret_val != IGC_SUCCESS) {
                DEBUGOUT("EEPROM read failed\n");
                goto out;
        }

        if (hw->nvm.ops.acquire(hw) == IGC_SUCCESS) {
                /* Do not use hw->nvm.ops.write, hw->nvm.ops.read
                 * because we do not want to take the synchronization
                 * semaphores twice here.
                 */

                for (i = 0; i < NVM_CHECKSUM_REG; i++) {
                        ret_val = igc_read_nvm_eerd(hw, i, 1, &nvm_data);
                        if (ret_val) {
                                hw->nvm.ops.release(hw);
                                DEBUGOUT("NVM Read Error while updating\n");
                                DEBUGOUT("checksum.\n");
                                goto out;
                        }
                        checksum += nvm_data;
                }
                checksum = (u16)NVM_SUM - checksum;
                ret_val = __igc_write_nvm_srwr(hw, NVM_CHECKSUM_REG, 1,
                                                 &checksum);
                if (ret_val != IGC_SUCCESS) {
                        hw->nvm.ops.release(hw);
                        DEBUGOUT("NVM Write Error while updating checksum.\n");
                        goto out;
                }

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

                ret_val = igc_update_flash_i225(hw);
        } else {
                ret_val = IGC_ERR_SWFW_SYNC;
        }
out:
        return ret_val;
}

/* igc_get_flash_presence_i225 - Check if flash device is detected.
 * @hw: pointer to the HW structure
 */
bool igc_get_flash_presence_i225(struct igc_hw *hw)
{
        u32 eec = 0;
        bool ret_val = false;

        DEBUGFUNC("igc_get_flash_presence_i225");

        eec = IGC_READ_REG(hw, IGC_EECD);

        if (eec & IGC_EECD_FLASH_DETECTED_I225)
                ret_val = true;

        return ret_val;
}

/* igc_set_flsw_flash_burst_counter_i225 - sets FLSW NVM Burst
 * Counter in FLSWCNT register.
 *
 * @hw: pointer to the HW structure
 * @burst_counter: size in bytes of the Flash burst to read or write
 */
s32 igc_set_flsw_flash_burst_counter_i225(struct igc_hw *hw,
                                            u32 burst_counter)
{
        s32 ret_val = IGC_SUCCESS;

        DEBUGFUNC("igc_set_flsw_flash_burst_counter_i225");

        /* Validate input data */
        if (burst_counter < IGC_I225_SHADOW_RAM_SIZE) {
                /* Write FLSWCNT - burst counter */
                IGC_WRITE_REG(hw, IGC_I225_FLSWCNT, burst_counter);
        } else {
                ret_val = IGC_ERR_INVALID_ARGUMENT;
        }

        return ret_val;
}

/* igc_write_erase_flash_command_i225 - write/erase to a sector
 * region on a given address.
 *
 * @hw: pointer to the HW structure
 * @opcode: opcode to be used for the write command
 * @address: the offset to write into the FLASH image
 */
s32 igc_write_erase_flash_command_i225(struct igc_hw *hw, u32 opcode,
                                         u32 address)
{
        u32 flswctl = 0;
        s32 timeout = IGC_NVM_GRANT_ATTEMPTS;
        s32 ret_val = IGC_SUCCESS;

        DEBUGFUNC("igc_write_erase_flash_command_i225");

        flswctl = IGC_READ_REG(hw, IGC_I225_FLSWCTL);
        /* Polling done bit on FLSWCTL register */
        while (timeout) {
                if (flswctl & IGC_FLSWCTL_DONE)
                        break;
                usec_delay(5);
                flswctl = IGC_READ_REG(hw, IGC_I225_FLSWCTL);
                timeout--;
        }

        if (!timeout) {
                DEBUGOUT("Flash transaction was not done\n");
                return -IGC_ERR_NVM;
        }

        /* Build and issue command on FLSWCTL register */
        flswctl = address | opcode;
        IGC_WRITE_REG(hw, IGC_I225_FLSWCTL, flswctl);

        /* Check if issued command is valid on FLSWCTL register */
        flswctl = IGC_READ_REG(hw, IGC_I225_FLSWCTL);
        if (!(flswctl & IGC_FLSWCTL_CMDV)) {
                DEBUGOUT("Write flash command failed\n");
                ret_val = IGC_ERR_INVALID_ARGUMENT;
        }

        return ret_val;
}

/* igc_update_flash_i225 - Commit EEPROM to the flash
 * if fw_valid_bit is set, FW is active. setting FLUPD bit in EEC
 * register makes the FW load the internal shadow RAM into the flash.
 * Otherwise, fw_valid_bit is 0. if FL_SECU.block_prtotected_sw = 0
 * then FW is not active so the SW is responsible shadow RAM dump.
 *
 * @hw: pointer to the HW structure
 */
s32 igc_update_flash_i225(struct igc_hw *hw)
{
        u16 current_offset_data = 0;
        u32 block_sw_protect = 1;
        u16 base_address = 0x0;
        u32 i, fw_valid_bit;
        u16 current_offset;
        s32 ret_val = 0;
        u32 flup;

        DEBUGFUNC("igc_update_flash_i225");

        block_sw_protect = IGC_READ_REG(hw, IGC_I225_FLSECU) &
                                          IGC_FLSECU_BLK_SW_ACCESS_I225;
        fw_valid_bit = IGC_READ_REG(hw, IGC_FWSM) &
                                      IGC_FWSM_FW_VALID_I225;
        if (fw_valid_bit) {
                ret_val = igc_pool_flash_update_done_i225(hw);
                if (ret_val == -IGC_ERR_NVM) {
                        DEBUGOUT("Flash update time out\n");
                        goto out;
                }

                flup = IGC_READ_REG(hw, IGC_EECD) | IGC_EECD_FLUPD_I225;
                IGC_WRITE_REG(hw, IGC_EECD, flup);

                ret_val = igc_pool_flash_update_done_i225(hw);
                if (ret_val == IGC_SUCCESS)
                        DEBUGOUT("Flash update complete\n");
                else
                        DEBUGOUT("Flash update time out\n");
        } else if (!block_sw_protect) {
                /* FW is not active and security protection is disabled.
                 * therefore, SW is in charge of shadow RAM dump.
                 * Check which sector is valid. if sector 0 is valid,
                 * base address remains 0x0. otherwise, sector 1 is
                 * valid and it's base address is 0x1000
                 */
                if (IGC_READ_REG(hw, IGC_EECD) & IGC_EECD_SEC1VAL_I225)
                        base_address = 0x1000;

                /* Valid sector erase */
                ret_val = igc_write_erase_flash_command_i225(hw,
                                                  IGC_I225_ERASE_CMD_OPCODE,
                                                  base_address);
                if (!ret_val) {
                        DEBUGOUT("Sector erase failed\n");
                        goto out;
                }

                current_offset = base_address;

                /* Write */
                for (i = 0; i < IGC_I225_SHADOW_RAM_SIZE / 2; i++) {
                        /* Set burst write length */
                        ret_val = igc_set_flsw_flash_burst_counter_i225(hw,
                                                                          0x2);
                        if (ret_val != IGC_SUCCESS)
                                break;

                        /* Set address and opcode */
                        ret_val = igc_write_erase_flash_command_i225(hw,
                                                IGC_I225_WRITE_CMD_OPCODE,
                                                2 * current_offset);
                        if (ret_val != IGC_SUCCESS)
                                break;

                        ret_val = igc_read_nvm_eerd(hw, current_offset,
                                                      1, &current_offset_data);
                        if (ret_val) {
                                DEBUGOUT("Failed to read from EEPROM\n");
                                goto out;
                        }

                        /* Write CurrentOffseData to FLSWDATA register */
                        IGC_WRITE_REG(hw, IGC_I225_FLSWDATA,
                                        current_offset_data);
                        current_offset++;

                        /* Wait till operation has finished */
                        ret_val = igc_poll_eerd_eewr_done(hw,
                                                IGC_NVM_POLL_READ);
                        if (ret_val)
                                break;

                        usec_delay(1000);
                }
        }
out:
        return ret_val;
}

/* igc_pool_flash_update_done_i225 - Pool FLUDONE status.
 * @hw: pointer to the HW structure
 */
s32 igc_pool_flash_update_done_i225(struct igc_hw *hw)
{
        s32 ret_val = -IGC_ERR_NVM;
        u32 i, reg;

        DEBUGFUNC("igc_pool_flash_update_done_i225");

        for (i = 0; i < IGC_FLUDONE_ATTEMPTS; i++) {
                reg = IGC_READ_REG(hw, IGC_EECD);
                if (reg & IGC_EECD_FLUDONE_I225) {
                        ret_val = IGC_SUCCESS;
                        break;
                }
                usec_delay(5);
        }

        return ret_val;
}

/* igc_set_ltr_i225 - Set Latency Tolerance Reporting thresholds.
 * @hw: pointer to the HW structure
 * @link: bool indicating link status
 *
 * Set the LTR thresholds based on the link speed (Mbps), EEE, and DMAC
 * settings, otherwise specify that there is no LTR requirement.
 */
static s32 igc_set_ltr_i225(struct igc_hw *hw, bool link)
{
        u16 speed, duplex;
        u32 tw_system, ltrc, ltrv, ltr_min, ltr_max, scale_min, scale_max;
        s32 size;

        DEBUGFUNC("igc_set_ltr_i225");

        /* If we do not have link, LTR thresholds are zero. */
        if (link) {
                hw->mac.ops.get_link_up_info(hw, &speed, &duplex);

                /* Check if using copper interface with EEE enabled or if the
                 * link speed is 10 Mbps.
                 */
                if ((hw->phy.media_type == igc_media_type_copper) &&
                    !(hw->dev_spec._i225.eee_disable) &&
                     (speed != SPEED_10)) {
                        /* EEE enabled, so send LTRMAX threshold. */
                        ltrc = IGC_READ_REG(hw, IGC_LTRC) |
                                IGC_LTRC_EEEMS_EN;
                        IGC_WRITE_REG(hw, IGC_LTRC, ltrc);

                        /* Calculate tw_system (nsec). */
                        if (speed == SPEED_100) {
                                tw_system = ((IGC_READ_REG(hw, IGC_EEE_SU) &
                                             IGC_TW_SYSTEM_100_MASK) >>
                                             IGC_TW_SYSTEM_100_SHIFT) * 500;
                        } else {
                                tw_system = (IGC_READ_REG(hw, IGC_EEE_SU) &
                                             IGC_TW_SYSTEM_1000_MASK) * 500;
                                }
                } else {
                        tw_system = 0;
                        }

                /* Get the Rx packet buffer size. */
                size = IGC_READ_REG(hw, IGC_RXPBS) &
                        IGC_RXPBS_SIZE_I225_MASK;

                /* Calculations vary based on DMAC settings. */
                if (IGC_READ_REG(hw, IGC_DMACR) & IGC_DMACR_DMAC_EN) {
                        size -= (IGC_READ_REG(hw, IGC_DMACR) &
                                 IGC_DMACR_DMACTHR_MASK) >>
                                 IGC_DMACR_DMACTHR_SHIFT;
                        /* Convert size to bits. */
                        size *= 1024 * 8;
                } else {
                        /* Convert size to bytes, subtract the MTU, and then
                         * convert the size to bits.
                         */
                        size *= 1024;
                        size -= hw->dev_spec._i225.mtu;
                        size *= 8;
                }

                if (size < 0) {
                        DEBUGOUT1("Invalid effective Rx buffer size %d\n",
                                  size);
                        return -IGC_ERR_CONFIG;
                }

                /* Calculate the thresholds. Since speed is in Mbps, simplify
                 * the calculation by multiplying size/speed by 1000 for result
                 * to be in nsec before dividing by the scale in nsec. Set the
                 * scale such that the LTR threshold fits in the register.
                 */
                ltr_min = (1000 * size) / speed;
                ltr_max = ltr_min + tw_system;
                scale_min = (ltr_min / 1024) < 1024 ? IGC_LTRMINV_SCALE_1024 :
                            IGC_LTRMINV_SCALE_32768;
                scale_max = (ltr_max / 1024) < 1024 ? IGC_LTRMAXV_SCALE_1024 :
                            IGC_LTRMAXV_SCALE_32768;
                ltr_min /= scale_min == IGC_LTRMINV_SCALE_1024 ? 1024 : 32768;
                ltr_max /= scale_max == IGC_LTRMAXV_SCALE_1024 ? 1024 : 32768;

                /* Only write the LTR thresholds if they differ from before. */
                ltrv = IGC_READ_REG(hw, IGC_LTRMINV);
                if (ltr_min != (ltrv & IGC_LTRMINV_LTRV_MASK)) {
                        ltrv = IGC_LTRMINV_LSNP_REQ | ltr_min |
                              (scale_min << IGC_LTRMINV_SCALE_SHIFT);
                        IGC_WRITE_REG(hw, IGC_LTRMINV, ltrv);
                }

                ltrv = IGC_READ_REG(hw, IGC_LTRMAXV);
                if (ltr_max != (ltrv & IGC_LTRMAXV_LTRV_MASK)) {
                        ltrv = IGC_LTRMAXV_LSNP_REQ | ltr_max |
                              (scale_min << IGC_LTRMAXV_SCALE_SHIFT);
                        IGC_WRITE_REG(hw, IGC_LTRMAXV, ltrv);
                }
        }

        return IGC_SUCCESS;
}

/* igc_check_for_link_i225 - Check for link
 * @hw: pointer to the HW structure
 *
 * Checks to see of the link status of the hardware has changed.  If a
 * change in link status has been detected, then we read the PHY registers
 * to get the current speed/duplex if link exists.
 */
s32 igc_check_for_link_i225(struct igc_hw *hw)
{
        struct igc_mac_info *mac = &hw->mac;
        s32 ret_val;
        bool link = false;

        DEBUGFUNC("igc_check_for_link_i225");

        /* 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 is set upon receiving
         * a Link Status Change or Rx Sequence Error interrupt.
         */
        if (!mac->get_link_status) {
                ret_val = IGC_SUCCESS;
                goto out;
        }

        /* 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.
         */
        ret_val = igc_phy_has_link_generic(hw, 1, 0, &link);
        if (ret_val)
                goto out;

        if (!link)
                goto out; /* No link detected */

        /* 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.
         */
        ret_val = igc_phy_has_link_generic(hw, 1, 0, &link);
        if (ret_val)
                goto out;

        if (!link)
                goto out; /* No link detected */

        mac->get_link_status = false;

        /* Check if there was DownShift, must be checked
         * immediately after link-up
         */
        igc_check_downshift_generic(hw);

        /* If we are forcing speed/duplex, then we simply return since
         * we have already determined whether we have link or not.
         */
        if (!mac->autoneg)
                goto out;

        /* Auto-Neg is enabled.  Auto Speed Detection takes care
         * of MAC speed/duplex configuration.  So we only need to
         * configure Collision Distance in the MAC.
         */
        mac->ops.config_collision_dist(hw);

        /* 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 = igc_config_fc_after_link_up_generic(hw);
        if (ret_val)
                DEBUGOUT("Error configuring flow control\n");
out:
        /* Now that we are aware of our link settings, we can set the LTR
         * thresholds.
         */
        ret_val = igc_set_ltr_i225(hw, link);

        return ret_val;
}

/* igc_init_function_pointers_i225 - Init func ptrs.
 * @hw: pointer to the HW structure
 *
 * Called to initialize all function pointers and parameters.
 */
void igc_init_function_pointers_i225(struct igc_hw *hw)
{
        igc_init_mac_ops_generic(hw);
        igc_init_phy_ops_generic(hw);
        igc_init_nvm_ops_generic(hw);
        hw->mac.ops.init_params = igc_init_mac_params_i225;
        hw->nvm.ops.init_params = igc_init_nvm_params_i225;
        hw->phy.ops.init_params = igc_init_phy_params_i225;
}

/* igc_init_hw_i225 - Init hw for I225
 * @hw: pointer to the HW structure
 *
 * Called to initialize hw for i225 hw family.
 */
s32 igc_init_hw_i225(struct igc_hw *hw)
{
        s32 ret_val;

        DEBUGFUNC("igc_init_hw_i225");

        ret_val = igc_init_hw_base(hw);
        return ret_val;
}

/*
 * igc_set_d0_lplu_state_i225 - Set Low-Power-Link-Up (LPLU) D0 state
 * @hw: pointer to the HW structure
 * @active: true to enable LPLU, false to disable
 *
 * Note: since I225 does not actually support LPLU, this function
 * simply enables/disables 1G and 2.5G speeds in D0.
 */
s32 igc_set_d0_lplu_state_i225(struct igc_hw *hw, bool active)
{
        u32 data;

        DEBUGFUNC("igc_set_d0_lplu_state_i225");

        data = IGC_READ_REG(hw, IGC_I225_PHPM);

        if (active) {
                data |= IGC_I225_PHPM_DIS_1000;
                data |= IGC_I225_PHPM_DIS_2500;
        } else {
                data &= ~IGC_I225_PHPM_DIS_1000;
                data &= ~IGC_I225_PHPM_DIS_2500;
        }

        IGC_WRITE_REG(hw, IGC_I225_PHPM, data);
        return IGC_SUCCESS;
}

/*
 * igc_set_d3_lplu_state_i225 - Set Low-Power-Link-Up (LPLU) D3 state
 * @hw: pointer to the HW structure
 * @active: true to enable LPLU, false to disable
 *
 * Note: since I225 does not actually support LPLU, this function
 * simply enables/disables 100M, 1G and 2.5G speeds in D3.
 */
s32 igc_set_d3_lplu_state_i225(struct igc_hw *hw, bool active)
{
        u32 data;

        DEBUGFUNC("igc_set_d3_lplu_state_i225");

        data = IGC_READ_REG(hw, IGC_I225_PHPM);

        if (active) {
                data |= IGC_I225_PHPM_DIS_100_D3;
                data |= IGC_I225_PHPM_DIS_1000_D3;
                data |= IGC_I225_PHPM_DIS_2500_D3;
        } else {
                data &= ~IGC_I225_PHPM_DIS_100_D3;
                data &= ~IGC_I225_PHPM_DIS_1000_D3;
                data &= ~IGC_I225_PHPM_DIS_2500_D3;
        }

        IGC_WRITE_REG(hw, IGC_I225_PHPM, data);
        return IGC_SUCCESS;
}

/**
 *  igc_set_eee_i225 - Enable/disable EEE support
 *  @hw: pointer to the HW structure
 *  @adv2p5G: boolean flag enabling 2.5G EEE advertisement
 *  @adv1G: boolean flag enabling 1G EEE advertisement
 *  @adv100M: boolean flag enabling 100M EEE advertisement
 *
 *  Enable/disable EEE based on setting in dev_spec structure.
 *
 **/
s32 igc_set_eee_i225(struct igc_hw *hw, bool adv2p5G, bool adv1G,
                       bool adv100M)
{
        u32 ipcnfg, eeer;

        DEBUGFUNC("igc_set_eee_i225");

        if (hw->mac.type != igc_i225 ||
            hw->phy.media_type != igc_media_type_copper)
                goto out;
        ipcnfg = IGC_READ_REG(hw, IGC_IPCNFG);
        eeer = IGC_READ_REG(hw, IGC_EEER);

        /* enable or disable per user setting */
        if (!(hw->dev_spec._i225.eee_disable)) {
                u32 eee_su = IGC_READ_REG(hw, IGC_EEE_SU);

                if (adv100M)
                        ipcnfg |= IGC_IPCNFG_EEE_100M_AN;
                else
                        ipcnfg &= ~IGC_IPCNFG_EEE_100M_AN;

                if (adv1G)
                        ipcnfg |= IGC_IPCNFG_EEE_1G_AN;
                else
                        ipcnfg &= ~IGC_IPCNFG_EEE_1G_AN;

                if (adv2p5G)
                        ipcnfg |= IGC_IPCNFG_EEE_2_5G_AN;
                else
                        ipcnfg &= ~IGC_IPCNFG_EEE_2_5G_AN;

                eeer |= (IGC_EEER_TX_LPI_EN | IGC_EEER_RX_LPI_EN |
                        IGC_EEER_LPI_FC);

                /* This bit should not be set in normal operation. */
                if (eee_su & IGC_EEE_SU_LPI_CLK_STP)
                        DEBUGOUT("LPI Clock Stop Bit should not be set!\n");
        } else {
                ipcnfg &= ~(IGC_IPCNFG_EEE_2_5G_AN | IGC_IPCNFG_EEE_1G_AN |
                        IGC_IPCNFG_EEE_100M_AN);
                eeer &= ~(IGC_EEER_TX_LPI_EN | IGC_EEER_RX_LPI_EN |
                        IGC_EEER_LPI_FC);
        }
        IGC_WRITE_REG(hw, IGC_IPCNFG, ipcnfg);
        IGC_WRITE_REG(hw, IGC_EEER, eeer);
        IGC_READ_REG(hw, IGC_IPCNFG);
        IGC_READ_REG(hw, IGC_EEER);
out:

        return IGC_SUCCESS;
}