Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

[cris-mirror.git] / drivers / net / ethernet / intel / igb / e1000_nvm.c

/* Intel(R) Gigabit Ethernet Linux driver
 * Copyright(c) 2007-2014 Intel Corporation.
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, see <http://www.gnu.org/licenses/>.
 *
 * The full GNU General Public License is included in this distribution in
 * the file called "COPYING".
 *
 * Contact Information:
 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 */

#include <linux/if_ether.h>
#include <linux/delay.h>

#include "e1000_mac.h"
#include "e1000_nvm.h"

/**
 *  igb_raise_eec_clk - Raise EEPROM clock
 *  @hw: pointer to the HW structure
 *  @eecd: pointer to the EEPROM
 *
 *  Enable/Raise the EEPROM clock bit.
 **/
static void igb_raise_eec_clk(struct e1000_hw *hw, u32 *eecd)
{
        *eecd = *eecd | E1000_EECD_SK;
        wr32(E1000_EECD, *eecd);
        wrfl();
        udelay(hw->nvm.delay_usec);
}

/**
 *  igb_lower_eec_clk - Lower EEPROM clock
 *  @hw: pointer to the HW structure
 *  @eecd: pointer to the EEPROM
 *
 *  Clear/Lower the EEPROM clock bit.
 **/
static void igb_lower_eec_clk(struct e1000_hw *hw, u32 *eecd)
{
        *eecd = *eecd & ~E1000_EECD_SK;
        wr32(E1000_EECD, *eecd);
        wrfl();
        udelay(hw->nvm.delay_usec);
}

/**
 *  igb_shift_out_eec_bits - Shift data bits our to the EEPROM
 *  @hw: pointer to the HW structure
 *  @data: data to send to the EEPROM
 *  @count: number of bits to shift out
 *
 *  We need to shift 'count' bits out to the EEPROM.  So, the 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.
 **/
static void igb_shift_out_eec_bits(struct e1000_hw *hw, u16 data, u16 count)
{
        struct e1000_nvm_info *nvm = &hw->nvm;
        u32 eecd = rd32(E1000_EECD);
        u32 mask;

        mask = 1u << (count - 1);
        if (nvm->type == e1000_nvm_eeprom_spi)
                eecd |= E1000_EECD_DO;

        do {
                eecd &= ~E1000_EECD_DI;

                if (data & mask)
                        eecd |= E1000_EECD_DI;

                wr32(E1000_EECD, eecd);
                wrfl();

                udelay(nvm->delay_usec);

                igb_raise_eec_clk(hw, &eecd);
                igb_lower_eec_clk(hw, &eecd);

                mask >>= 1;
        } while (mask);

        eecd &= ~E1000_EECD_DI;
        wr32(E1000_EECD, eecd);
}

/**
 *  igb_shift_in_eec_bits - Shift data bits in from the EEPROM
 *  @hw: pointer to the HW structure
 *  @count: number of bits to shift in
 *
 *  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 data out
 *  "DO" bit.  During this "shifting in" process the data in "DI" bit should
 *  always be clear.
 **/
static u16 igb_shift_in_eec_bits(struct e1000_hw *hw, u16 count)
{
        u32 eecd;
        u32 i;
        u16 data;

        eecd = rd32(E1000_EECD);

        eecd &= ~(E1000_EECD_DO | E1000_EECD_DI);
        data = 0;

        for (i = 0; i < count; i++) {
                data <<= 1;
                igb_raise_eec_clk(hw, &eecd);

                eecd = rd32(E1000_EECD);

                eecd &= ~E1000_EECD_DI;
                if (eecd & E1000_EECD_DO)
                        data |= 1;

                igb_lower_eec_clk(hw, &eecd);
        }

        return data;
}

/**
 *  igb_poll_eerd_eewr_done - Poll for EEPROM read/write completion
 *  @hw: pointer to the HW structure
 *  @ee_reg: EEPROM flag for polling
 *
 *  Polls the EEPROM status bit for either read or write completion based
 *  upon the value of 'ee_reg'.
 **/
static s32 igb_poll_eerd_eewr_done(struct e1000_hw *hw, int ee_reg)
{
        u32 attempts = 100000;
        u32 i, reg = 0;
        s32 ret_val = -E1000_ERR_NVM;

        for (i = 0; i < attempts; i++) {
                if (ee_reg == E1000_NVM_POLL_READ)
                        reg = rd32(E1000_EERD);
                else
                        reg = rd32(E1000_EEWR);

                if (reg & E1000_NVM_RW_REG_DONE) {
                        ret_val = 0;
                        break;
                }

                udelay(5);
        }

        return ret_val;
}

/**
 *  igb_acquire_nvm - Generic request for access to EEPROM
 *  @hw: pointer to the HW structure
 *
 *  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 -E1000_ERR_NVM (-1).
 **/
s32 igb_acquire_nvm(struct e1000_hw *hw)
{
        u32 eecd = rd32(E1000_EECD);
        s32 timeout = E1000_NVM_GRANT_ATTEMPTS;
        s32 ret_val = 0;


        wr32(E1000_EECD, eecd | E1000_EECD_REQ);
        eecd = rd32(E1000_EECD);

        while (timeout) {
                if (eecd & E1000_EECD_GNT)
                        break;
                udelay(5);
                eecd = rd32(E1000_EECD);
                timeout--;
        }

        if (!timeout) {
                eecd &= ~E1000_EECD_REQ;
                wr32(E1000_EECD, eecd);
                hw_dbg("Could not acquire NVM grant\n");
                ret_val = -E1000_ERR_NVM;
        }

        return ret_val;
}

/**
 *  igb_standby_nvm - Return EEPROM to standby state
 *  @hw: pointer to the HW structure
 *
 *  Return the EEPROM to a standby state.
 **/
static void igb_standby_nvm(struct e1000_hw *hw)
{
        struct e1000_nvm_info *nvm = &hw->nvm;
        u32 eecd = rd32(E1000_EECD);

        if (nvm->type == e1000_nvm_eeprom_spi) {
                /* Toggle CS to flush commands */
                eecd |= E1000_EECD_CS;
                wr32(E1000_EECD, eecd);
                wrfl();
                udelay(nvm->delay_usec);
                eecd &= ~E1000_EECD_CS;
                wr32(E1000_EECD, eecd);
                wrfl();
                udelay(nvm->delay_usec);
        }
}

/**
 *  e1000_stop_nvm - Terminate EEPROM command
 *  @hw: pointer to the HW structure
 *
 *  Terminates the current command by inverting the EEPROM's chip select pin.
 **/
static void e1000_stop_nvm(struct e1000_hw *hw)
{
        u32 eecd;

        eecd = rd32(E1000_EECD);
        if (hw->nvm.type == e1000_nvm_eeprom_spi) {
                /* Pull CS high */
                eecd |= E1000_EECD_CS;
                igb_lower_eec_clk(hw, &eecd);
        }
}

/**
 *  igb_release_nvm - Release exclusive access to EEPROM
 *  @hw: pointer to the HW structure
 *
 *  Stop any current commands to the EEPROM and clear the EEPROM request bit.
 **/
void igb_release_nvm(struct e1000_hw *hw)
{
        u32 eecd;

        e1000_stop_nvm(hw);

        eecd = rd32(E1000_EECD);
        eecd &= ~E1000_EECD_REQ;
        wr32(E1000_EECD, eecd);
}

/**
 *  igb_ready_nvm_eeprom - Prepares EEPROM for read/write
 *  @hw: pointer to the HW structure
 *
 *  Setups the EEPROM for reading and writing.
 **/
static s32 igb_ready_nvm_eeprom(struct e1000_hw *hw)
{
        struct e1000_nvm_info *nvm = &hw->nvm;
        u32 eecd = rd32(E1000_EECD);
        s32 ret_val = 0;
        u16 timeout = 0;
        u8 spi_stat_reg;


        if (nvm->type == e1000_nvm_eeprom_spi) {
                /* Clear SK and CS */
                eecd &= ~(E1000_EECD_CS | E1000_EECD_SK);
                wr32(E1000_EECD, eecd);
                wrfl();
                udelay(1);
                timeout = NVM_MAX_RETRY_SPI;

                /* 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 'timeout', then error out.
                 */
                while (timeout) {
                        igb_shift_out_eec_bits(hw, NVM_RDSR_OPCODE_SPI,
                                               hw->nvm.opcode_bits);
                        spi_stat_reg = (u8)igb_shift_in_eec_bits(hw, 8);
                        if (!(spi_stat_reg & NVM_STATUS_RDY_SPI))
                                break;

                        udelay(5);
                        igb_standby_nvm(hw);
                        timeout--;
                }

                if (!timeout) {
                        hw_dbg("SPI NVM Status error\n");
                        ret_val = -E1000_ERR_NVM;
                        goto out;
                }
        }

out:
        return ret_val;
}

/**
 *  igb_read_nvm_spi - Read EEPROM's using SPI
 *  @hw: pointer to the HW structure
 *  @offset: offset of word in the EEPROM to read
 *  @words: number of words to read
 *  @data: word read from the EEPROM
 *
 *  Reads a 16 bit word from the EEPROM.
 **/
s32 igb_read_nvm_spi(struct e1000_hw *hw, u16 offset, u16 words, u16 *data)
{
        struct e1000_nvm_info *nvm = &hw->nvm;
        u32 i = 0;
        s32 ret_val;
        u16 word_in;
        u8 read_opcode = NVM_READ_OPCODE_SPI;

        /* A check for invalid values:  offset too large, too many words,
         * and not enough words.
         */
        if ((offset >= nvm->word_size) || (words > (nvm->word_size - offset)) ||
            (words == 0)) {
                hw_dbg("nvm parameter(s) out of bounds\n");
                ret_val = -E1000_ERR_NVM;
                goto out;
        }

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

        ret_val = igb_ready_nvm_eeprom(hw);
        if (ret_val)
                goto release;

        igb_standby_nvm(hw);

        if ((nvm->address_bits == 8) && (offset >= 128))
                read_opcode |= NVM_A8_OPCODE_SPI;

        /* Send the READ command (opcode + addr) */
        igb_shift_out_eec_bits(hw, read_opcode, nvm->opcode_bits);
        igb_shift_out_eec_bits(hw, (u16)(offset*2), nvm->address_bits);

        /* Read the data.  SPI NVMs increment the address with each byte
         * read and will roll over if reading beyond the end.  This allows
         * us to read the whole NVM from any offset
         */
        for (i = 0; i < words; i++) {
                word_in = igb_shift_in_eec_bits(hw, 16);
                data[i] = (word_in >> 8) | (word_in << 8);
        }

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

out:
        return ret_val;
}

/**
 *  igb_read_nvm_eerd - Reads EEPROM using EERD register
 *  @hw: pointer to the HW structure
 *  @offset: offset of word in the EEPROM to read
 *  @words: number of words to read
 *  @data: word read from the EEPROM
 *
 *  Reads a 16 bit word from the EEPROM using the EERD register.
 **/
s32 igb_read_nvm_eerd(struct e1000_hw *hw, u16 offset, u16 words, u16 *data)
{
        struct e1000_nvm_info *nvm = &hw->nvm;
        u32 i, eerd = 0;
        s32 ret_val = 0;

        /* A check for invalid values:  offset too large, too many words,
         * and not enough words.
         */
        if ((offset >= nvm->word_size) || (words > (nvm->word_size - offset)) ||
            (words == 0)) {
                hw_dbg("nvm parameter(s) out of bounds\n");
                ret_val = -E1000_ERR_NVM;
                goto out;
        }

        for (i = 0; i < words; i++) {
                eerd = ((offset+i) << E1000_NVM_RW_ADDR_SHIFT) +
                        E1000_NVM_RW_REG_START;

                wr32(E1000_EERD, eerd);
                ret_val = igb_poll_eerd_eewr_done(hw, E1000_NVM_POLL_READ);
                if (ret_val)
                        break;

                data[i] = (rd32(E1000_EERD) >>
                        E1000_NVM_RW_REG_DATA);
        }

out:
        return ret_val;
}

/**
 *  igb_write_nvm_spi - Write to EEPROM using SPI
 *  @hw: pointer to the HW structure
 *  @offset: offset within the EEPROM to be written to
 *  @words: number of words to write
 *  @data: 16 bit word(s) to be written to the EEPROM
 *
 *  Writes data to EEPROM at offset using SPI interface.
 *
 *  If e1000_update_nvm_checksum is not called after this function , the
 *  EEPROM will most likley contain an invalid checksum.
 **/
s32 igb_write_nvm_spi(struct e1000_hw *hw, u16 offset, u16 words, u16 *data)
{
        struct e1000_nvm_info *nvm = &hw->nvm;
        s32 ret_val = -E1000_ERR_NVM;
        u16 widx = 0;

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

        while (widx < words) {
                u8 write_opcode = NVM_WRITE_OPCODE_SPI;

                ret_val = nvm->ops.acquire(hw);
                if (ret_val)
                        return ret_val;

                ret_val = igb_ready_nvm_eeprom(hw);
                if (ret_val) {
                        nvm->ops.release(hw);
                        return ret_val;
                }

                igb_standby_nvm(hw);

                /* Send the WRITE ENABLE command (8 bit opcode) */
                igb_shift_out_eec_bits(hw, NVM_WREN_OPCODE_SPI,
                                         nvm->opcode_bits);

                igb_standby_nvm(hw);

                /* Some SPI eeproms use the 8th address bit embedded in the
                 * opcode
                 */
                if ((nvm->address_bits == 8) && (offset >= 128))
                        write_opcode |= NVM_A8_OPCODE_SPI;

                /* Send the Write command (8-bit opcode + addr) */
                igb_shift_out_eec_bits(hw, write_opcode, nvm->opcode_bits);
                igb_shift_out_eec_bits(hw, (u16)((offset + widx) * 2),
                                         nvm->address_bits);

                /* Loop to allow for up to whole page write of eeprom */
                while (widx < words) {
                        u16 word_out = data[widx];

                        word_out = (word_out >> 8) | (word_out << 8);
                        igb_shift_out_eec_bits(hw, word_out, 16);
                        widx++;

                        if ((((offset + widx) * 2) % nvm->page_size) == 0) {
                                igb_standby_nvm(hw);
                                break;
                        }
                }
                usleep_range(1000, 2000);
                nvm->ops.release(hw);
        }

        return ret_val;
}

/**
 *  igb_read_part_string - Read device part number
 *  @hw: pointer to the HW structure
 *  @part_num: pointer to device part number
 *  @part_num_size: size of part number buffer
 *
 *  Reads the product board assembly (PBA) number from the EEPROM and stores
 *  the value in part_num.
 **/
s32 igb_read_part_string(struct e1000_hw *hw, u8 *part_num, u32 part_num_size)
{
        s32 ret_val;
        u16 nvm_data;
        u16 pointer;
        u16 offset;
        u16 length;

        if (part_num == NULL) {
                hw_dbg("PBA string buffer was null\n");
                ret_val = E1000_ERR_INVALID_ARGUMENT;
                goto out;
        }

        ret_val = hw->nvm.ops.read(hw, NVM_PBA_OFFSET_0, 1, &nvm_data);
        if (ret_val) {
                hw_dbg("NVM Read Error\n");
                goto out;
        }

        ret_val = hw->nvm.ops.read(hw, NVM_PBA_OFFSET_1, 1, &pointer);
        if (ret_val) {
                hw_dbg("NVM Read Error\n");
                goto out;
        }

        /* if nvm_data is not ptr guard the PBA must be in legacy format which
         * means pointer is actually our second data word for the PBA number
         * and we can decode it into an ascii string
         */
        if (nvm_data != NVM_PBA_PTR_GUARD) {
                hw_dbg("NVM PBA number is not stored as string\n");

                /* we will need 11 characters to store the PBA */
                if (part_num_size < 11) {
                        hw_dbg("PBA string buffer too small\n");
                        return E1000_ERR_NO_SPACE;
                }

                /* extract hex string from data and pointer */
                part_num[0] = (nvm_data >> 12) & 0xF;
                part_num[1] = (nvm_data >> 8) & 0xF;
                part_num[2] = (nvm_data >> 4) & 0xF;
                part_num[3] = nvm_data & 0xF;
                part_num[4] = (pointer >> 12) & 0xF;
                part_num[5] = (pointer >> 8) & 0xF;
                part_num[6] = '-';
                part_num[7] = 0;
                part_num[8] = (pointer >> 4) & 0xF;
                part_num[9] = pointer & 0xF;

                /* put a null character on the end of our string */
                part_num[10] = '\0';

                /* switch all the data but the '-' to hex char */
                for (offset = 0; offset < 10; offset++) {
                        if (part_num[offset] < 0xA)
                                part_num[offset] += '0';
                        else if (part_num[offset] < 0x10)
                                part_num[offset] += 'A' - 0xA;
                }

                goto out;
        }

        ret_val = hw->nvm.ops.read(hw, pointer, 1, &length);
        if (ret_val) {
                hw_dbg("NVM Read Error\n");
                goto out;
        }

        if (length == 0xFFFF || length == 0) {
                hw_dbg("NVM PBA number section invalid length\n");
                ret_val = E1000_ERR_NVM_PBA_SECTION;
                goto out;
        }
        /* check if part_num buffer is big enough */
        if (part_num_size < (((u32)length * 2) - 1)) {
                hw_dbg("PBA string buffer too small\n");
                ret_val = E1000_ERR_NO_SPACE;
                goto out;
        }

        /* trim pba length from start of string */
        pointer++;
        length--;

        for (offset = 0; offset < length; offset++) {
                ret_val = hw->nvm.ops.read(hw, pointer + offset, 1, &nvm_data);
                if (ret_val) {
                        hw_dbg("NVM Read Error\n");
                        goto out;
                }
                part_num[offset * 2] = (u8)(nvm_data >> 8);
                part_num[(offset * 2) + 1] = (u8)(nvm_data & 0xFF);
        }
        part_num[offset * 2] = '\0';

out:
        return ret_val;
}

/**
 *  igb_read_mac_addr - Read device MAC address
 *  @hw: pointer to the HW structure
 *
 *  Reads the device MAC address from the EEPROM and stores the value.
 *  Since devices with two ports use the same EEPROM, we increment the
 *  last bit in the MAC address for the second port.
 **/
s32 igb_read_mac_addr(struct e1000_hw *hw)
{
        u32 rar_high;
        u32 rar_low;
        u16 i;

        rar_high = rd32(E1000_RAH(0));
        rar_low = rd32(E1000_RAL(0));

        for (i = 0; i < E1000_RAL_MAC_ADDR_LEN; i++)
                hw->mac.perm_addr[i] = (u8)(rar_low >> (i*8));

        for (i = 0; i < E1000_RAH_MAC_ADDR_LEN; i++)
                hw->mac.perm_addr[i+4] = (u8)(rar_high >> (i*8));

        for (i = 0; i < ETH_ALEN; i++)
                hw->mac.addr[i] = hw->mac.perm_addr[i];

        return 0;
}

/**
 *  igb_validate_nvm_checksum - 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 igb_validate_nvm_checksum(struct e1000_hw *hw)
{
        s32 ret_val = 0;
        u16 checksum = 0;
        u16 i, nvm_data;

        for (i = 0; i < (NVM_CHECKSUM_REG + 1); i++) {
                ret_val = hw->nvm.ops.read(hw, i, 1, &nvm_data);
                if (ret_val) {
                        hw_dbg("NVM Read Error\n");
                        goto out;
                }
                checksum += nvm_data;
        }

        if (checksum != (u16) NVM_SUM) {
                hw_dbg("NVM Checksum Invalid\n");
                ret_val = -E1000_ERR_NVM;
                goto out;
        }

out:
        return ret_val;
}

/**
 *  igb_update_nvm_checksum - 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.
 **/
s32 igb_update_nvm_checksum(struct e1000_hw *hw)
{
        s32  ret_val;
        u16 checksum = 0;
        u16 i, nvm_data;

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

out:
        return ret_val;
}

/**
 *  igb_get_fw_version - Get firmware version information
 *  @hw: pointer to the HW structure
 *  @fw_vers: pointer to output structure
 *
 *  unsupported MAC types will return all 0 version structure
 **/
void igb_get_fw_version(struct e1000_hw *hw, struct e1000_fw_version *fw_vers)
{
        u16 eeprom_verh, eeprom_verl, etrack_test, fw_version;
        u8 q, hval, rem, result;
        u16 comb_verh, comb_verl, comb_offset;

        memset(fw_vers, 0, sizeof(struct e1000_fw_version));

        /* basic eeprom version numbers and bits used vary by part and by tool
         * used to create the nvm images. Check which data format we have.
         */
        hw->nvm.ops.read(hw, NVM_ETRACK_HIWORD, 1, &etrack_test);
        switch (hw->mac.type) {
        case e1000_i211:
                igb_read_invm_version(hw, fw_vers);
                return;
        case e1000_82575:
        case e1000_82576:
        case e1000_82580:
                /* Use this format, unless EETRACK ID exists,
                 * then use alternate format
                 */
                if ((etrack_test &  NVM_MAJOR_MASK) != NVM_ETRACK_VALID) {
                        hw->nvm.ops.read(hw, NVM_VERSION, 1, &fw_version);
                        fw_vers->eep_major = (fw_version & NVM_MAJOR_MASK)
                                              >> NVM_MAJOR_SHIFT;
                        fw_vers->eep_minor = (fw_version & NVM_MINOR_MASK)
                                              >> NVM_MINOR_SHIFT;
                        fw_vers->eep_build = (fw_version & NVM_IMAGE_ID_MASK);
                        goto etrack_id;
                }
                break;
        case e1000_i210:
                if (!(igb_get_flash_presence_i210(hw))) {
                        igb_read_invm_version(hw, fw_vers);
                        return;
                }
                /* fall through */
        case e1000_i350:
                /* find combo image version */
                hw->nvm.ops.read(hw, NVM_COMB_VER_PTR, 1, &comb_offset);
                if ((comb_offset != 0x0) &&
                    (comb_offset != NVM_VER_INVALID)) {

                        hw->nvm.ops.read(hw, (NVM_COMB_VER_OFF + comb_offset
                                         + 1), 1, &comb_verh);
                        hw->nvm.ops.read(hw, (NVM_COMB_VER_OFF + comb_offset),
                                         1, &comb_verl);

                        /* get Option Rom version if it exists and is valid */
                        if ((comb_verh && comb_verl) &&
                            ((comb_verh != NVM_VER_INVALID) &&
                             (comb_verl != NVM_VER_INVALID))) {

                                fw_vers->or_valid = true;
                                fw_vers->or_major =
                                        comb_verl >> NVM_COMB_VER_SHFT;
                                fw_vers->or_build =
                                        (comb_verl << NVM_COMB_VER_SHFT)
                                        | (comb_verh >> NVM_COMB_VER_SHFT);
                                fw_vers->or_patch =
                                        comb_verh & NVM_COMB_VER_MASK;
                        }
                }
                break;
        default:
                return;
        }
        hw->nvm.ops.read(hw, NVM_VERSION, 1, &fw_version);
        fw_vers->eep_major = (fw_version & NVM_MAJOR_MASK)
                              >> NVM_MAJOR_SHIFT;

        /* check for old style version format in newer images*/
        if ((fw_version & NVM_NEW_DEC_MASK) == 0x0) {
                eeprom_verl = (fw_version & NVM_COMB_VER_MASK);
        } else {
                eeprom_verl = (fw_version & NVM_MINOR_MASK)
                                >> NVM_MINOR_SHIFT;
        }
        /* Convert minor value to hex before assigning to output struct
         * Val to be converted will not be higher than 99, per tool output
         */
        q = eeprom_verl / NVM_HEX_CONV;
        hval = q * NVM_HEX_TENS;
        rem = eeprom_verl % NVM_HEX_CONV;
        result = hval + rem;
        fw_vers->eep_minor = result;

etrack_id:
        if ((etrack_test &  NVM_MAJOR_MASK) == NVM_ETRACK_VALID) {
                hw->nvm.ops.read(hw, NVM_ETRACK_WORD, 1, &eeprom_verl);
                hw->nvm.ops.read(hw, (NVM_ETRACK_WORD + 1), 1, &eeprom_verh);
                fw_vers->etrack_id = (eeprom_verh << NVM_ETRACK_SHIFT)
                        | eeprom_verl;
        }
}