fp@2584: /*******************************************************************************
fp@2584: 
fp@2584:   Intel PRO/1000 Linux driver
fp@2584:   Copyright(c) 1999 - 2012 Intel Corporation.
fp@2584: 
fp@2584:   This program is free software; you can redistribute it and/or modify it
fp@2584:   under the terms and conditions of the GNU General Public License,
fp@2584:   version 2, as published by the Free Software Foundation.
fp@2584: 
fp@2584:   This program is distributed in the hope it will be useful, but WITHOUT
fp@2584:   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
fp@2584:   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
fp@2584:   more details.
fp@2584: 
fp@2584:   You should have received a copy of the GNU General Public License along with
fp@2584:   this program; if not, write to the Free Software Foundation, Inc.,
fp@2584:   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
fp@2584: 
fp@2584:   The full GNU General Public License is included in this distribution in
fp@2584:   the file called "COPYING".
fp@2584: 
fp@2584:   Contact Information:
fp@2584:   Linux NICS <linux.nics@intel.com>
fp@2584:   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
fp@2584:   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
fp@2584: 
fp@2584: *******************************************************************************/
fp@2584: 
fp@2584: #include "e1000-3.8-ethercat.h"
fp@2584: 
fp@2584: /**
fp@2584:  *  e1000_raise_eec_clk - Raise EEPROM clock
fp@2584:  *  @hw: pointer to the HW structure
fp@2584:  *  @eecd: pointer to the EEPROM
fp@2584:  *
fp@2584:  *  Enable/Raise the EEPROM clock bit.
fp@2584:  **/
fp@2584: static void e1000_raise_eec_clk(struct e1000_hw *hw, u32 *eecd)
fp@2584: {
fp@2584: 	*eecd = *eecd | E1000_EECD_SK;
fp@2584: 	ew32(EECD, *eecd);
fp@2584: 	e1e_flush();
fp@2584: 	udelay(hw->nvm.delay_usec);
fp@2584: }
fp@2584: 
fp@2584: /**
fp@2584:  *  e1000_lower_eec_clk - Lower EEPROM clock
fp@2584:  *  @hw: pointer to the HW structure
fp@2584:  *  @eecd: pointer to the EEPROM
fp@2584:  *
fp@2584:  *  Clear/Lower the EEPROM clock bit.
fp@2584:  **/
fp@2584: static void e1000_lower_eec_clk(struct e1000_hw *hw, u32 *eecd)
fp@2584: {
fp@2584: 	*eecd = *eecd & ~E1000_EECD_SK;
fp@2584: 	ew32(EECD, *eecd);
fp@2584: 	e1e_flush();
fp@2584: 	udelay(hw->nvm.delay_usec);
fp@2584: }
fp@2584: 
fp@2584: /**
fp@2584:  *  e1000_shift_out_eec_bits - Shift data bits our to the EEPROM
fp@2584:  *  @hw: pointer to the HW structure
fp@2584:  *  @data: data to send to the EEPROM
fp@2584:  *  @count: number of bits to shift out
fp@2584:  *
fp@2584:  *  We need to shift 'count' bits out to the EEPROM.  So, the value in the
fp@2584:  *  "data" parameter will be shifted out to the EEPROM one bit at a time.
fp@2584:  *  In order to do this, "data" must be broken down into bits.
fp@2584:  **/
fp@2584: static void e1000_shift_out_eec_bits(struct e1000_hw *hw, u16 data, u16 count)
fp@2584: {
fp@2584: 	struct e1000_nvm_info *nvm = &hw->nvm;
fp@2584: 	u32 eecd = er32(EECD);
fp@2584: 	u32 mask;
fp@2584: 
fp@2584: 	mask = 0x01 << (count - 1);
fp@2584: 	if (nvm->type == e1000_nvm_eeprom_spi)
fp@2584: 		eecd |= E1000_EECD_DO;
fp@2584: 
fp@2584: 	do {
fp@2584: 		eecd &= ~E1000_EECD_DI;
fp@2584: 
fp@2584: 		if (data & mask)
fp@2584: 			eecd |= E1000_EECD_DI;
fp@2584: 
fp@2584: 		ew32(EECD, eecd);
fp@2584: 		e1e_flush();
fp@2584: 
fp@2584: 		udelay(nvm->delay_usec);
fp@2584: 
fp@2584: 		e1000_raise_eec_clk(hw, &eecd);
fp@2584: 		e1000_lower_eec_clk(hw, &eecd);
fp@2584: 
fp@2584: 		mask >>= 1;
fp@2584: 	} while (mask);
fp@2584: 
fp@2584: 	eecd &= ~E1000_EECD_DI;
fp@2584: 	ew32(EECD, eecd);
fp@2584: }
fp@2584: 
fp@2584: /**
fp@2584:  *  e1000_shift_in_eec_bits - Shift data bits in from the EEPROM
fp@2584:  *  @hw: pointer to the HW structure
fp@2584:  *  @count: number of bits to shift in
fp@2584:  *
fp@2584:  *  In order to read a register from the EEPROM, we need to shift 'count' bits
fp@2584:  *  in from the EEPROM.  Bits are "shifted in" by raising the clock input to
fp@2584:  *  the EEPROM (setting the SK bit), and then reading the value of the data out
fp@2584:  *  "DO" bit.  During this "shifting in" process the data in "DI" bit should
fp@2584:  *  always be clear.
fp@2584:  **/
fp@2584: static u16 e1000_shift_in_eec_bits(struct e1000_hw *hw, u16 count)
fp@2584: {
fp@2584: 	u32 eecd;
fp@2584: 	u32 i;
fp@2584: 	u16 data;
fp@2584: 
fp@2584: 	eecd = er32(EECD);
fp@2584: 
fp@2584: 	eecd &= ~(E1000_EECD_DO | E1000_EECD_DI);
fp@2584: 	data = 0;
fp@2584: 
fp@2584: 	for (i = 0; i < count; i++) {
fp@2584: 		data <<= 1;
fp@2584: 		e1000_raise_eec_clk(hw, &eecd);
fp@2584: 
fp@2584: 		eecd = er32(EECD);
fp@2584: 
fp@2584: 		eecd &= ~E1000_EECD_DI;
fp@2584: 		if (eecd & E1000_EECD_DO)
fp@2584: 			data |= 1;
fp@2584: 
fp@2584: 		e1000_lower_eec_clk(hw, &eecd);
fp@2584: 	}
fp@2584: 
fp@2584: 	return data;
fp@2584: }
fp@2584: 
fp@2584: /**
fp@2584:  *  e1000e_poll_eerd_eewr_done - Poll for EEPROM read/write completion
fp@2584:  *  @hw: pointer to the HW structure
fp@2584:  *  @ee_reg: EEPROM flag for polling
fp@2584:  *
fp@2584:  *  Polls the EEPROM status bit for either read or write completion based
fp@2584:  *  upon the value of 'ee_reg'.
fp@2584:  **/
fp@2584: s32 e1000e_poll_eerd_eewr_done(struct e1000_hw *hw, int ee_reg)
fp@2584: {
fp@2584: 	u32 attempts = 100000;
fp@2584: 	u32 i, reg = 0;
fp@2584: 
fp@2584: 	for (i = 0; i < attempts; i++) {
fp@2584: 		if (ee_reg == E1000_NVM_POLL_READ)
fp@2584: 			reg = er32(EERD);
fp@2584: 		else
fp@2584: 			reg = er32(EEWR);
fp@2584: 
fp@2584: 		if (reg & E1000_NVM_RW_REG_DONE)
fp@2584: 			return 0;
fp@2584: 
fp@2584: 		udelay(5);
fp@2584: 	}
fp@2584: 
fp@2584: 	return -E1000_ERR_NVM;
fp@2584: }
fp@2584: 
fp@2584: /**
fp@2584:  *  e1000e_acquire_nvm - Generic request for access to EEPROM
fp@2584:  *  @hw: pointer to the HW structure
fp@2584:  *
fp@2584:  *  Set the EEPROM access request bit and wait for EEPROM access grant bit.
fp@2584:  *  Return successful if access grant bit set, else clear the request for
fp@2584:  *  EEPROM access and return -E1000_ERR_NVM (-1).
fp@2584:  **/
fp@2584: s32 e1000e_acquire_nvm(struct e1000_hw *hw)
fp@2584: {
fp@2584: 	u32 eecd = er32(EECD);
fp@2584: 	s32 timeout = E1000_NVM_GRANT_ATTEMPTS;
fp@2584: 
fp@2584: 	ew32(EECD, eecd | E1000_EECD_REQ);
fp@2584: 	eecd = er32(EECD);
fp@2584: 
fp@2584: 	while (timeout) {
fp@2584: 		if (eecd & E1000_EECD_GNT)
fp@2584: 			break;
fp@2584: 		udelay(5);
fp@2584: 		eecd = er32(EECD);
fp@2584: 		timeout--;
fp@2584: 	}
fp@2584: 
fp@2584: 	if (!timeout) {
fp@2584: 		eecd &= ~E1000_EECD_REQ;
fp@2584: 		ew32(EECD, eecd);
fp@2584: 		e_dbg("Could not acquire NVM grant\n");
fp@2584: 		return -E1000_ERR_NVM;
fp@2584: 	}
fp@2584: 
fp@2584: 	return 0;
fp@2584: }
fp@2584: 
fp@2584: /**
fp@2584:  *  e1000_standby_nvm - Return EEPROM to standby state
fp@2584:  *  @hw: pointer to the HW structure
fp@2584:  *
fp@2584:  *  Return the EEPROM to a standby state.
fp@2584:  **/
fp@2584: static void e1000_standby_nvm(struct e1000_hw *hw)
fp@2584: {
fp@2584: 	struct e1000_nvm_info *nvm = &hw->nvm;
fp@2584: 	u32 eecd = er32(EECD);
fp@2584: 
fp@2584: 	if (nvm->type == e1000_nvm_eeprom_spi) {
fp@2584: 		/* Toggle CS to flush commands */
fp@2584: 		eecd |= E1000_EECD_CS;
fp@2584: 		ew32(EECD, eecd);
fp@2584: 		e1e_flush();
fp@2584: 		udelay(nvm->delay_usec);
fp@2584: 		eecd &= ~E1000_EECD_CS;
fp@2584: 		ew32(EECD, eecd);
fp@2584: 		e1e_flush();
fp@2584: 		udelay(nvm->delay_usec);
fp@2584: 	}
fp@2584: }
fp@2584: 
fp@2584: /**
fp@2584:  *  e1000_stop_nvm - Terminate EEPROM command
fp@2584:  *  @hw: pointer to the HW structure
fp@2584:  *
fp@2584:  *  Terminates the current command by inverting the EEPROM's chip select pin.
fp@2584:  **/
fp@2584: static void e1000_stop_nvm(struct e1000_hw *hw)
fp@2584: {
fp@2584: 	u32 eecd;
fp@2584: 
fp@2584: 	eecd = er32(EECD);
fp@2584: 	if (hw->nvm.type == e1000_nvm_eeprom_spi) {
fp@2584: 		/* Pull CS high */
fp@2584: 		eecd |= E1000_EECD_CS;
fp@2584: 		e1000_lower_eec_clk(hw, &eecd);
fp@2584: 	}
fp@2584: }
fp@2584: 
fp@2584: /**
fp@2584:  *  e1000e_release_nvm - Release exclusive access to EEPROM
fp@2584:  *  @hw: pointer to the HW structure
fp@2584:  *
fp@2584:  *  Stop any current commands to the EEPROM and clear the EEPROM request bit.
fp@2584:  **/
fp@2584: void e1000e_release_nvm(struct e1000_hw *hw)
fp@2584: {
fp@2584: 	u32 eecd;
fp@2584: 
fp@2584: 	e1000_stop_nvm(hw);
fp@2584: 
fp@2584: 	eecd = er32(EECD);
fp@2584: 	eecd &= ~E1000_EECD_REQ;
fp@2584: 	ew32(EECD, eecd);
fp@2584: }
fp@2584: 
fp@2584: /**
fp@2584:  *  e1000_ready_nvm_eeprom - Prepares EEPROM for read/write
fp@2584:  *  @hw: pointer to the HW structure
fp@2584:  *
fp@2584:  *  Setups the EEPROM for reading and writing.
fp@2584:  **/
fp@2584: static s32 e1000_ready_nvm_eeprom(struct e1000_hw *hw)
fp@2584: {
fp@2584: 	struct e1000_nvm_info *nvm = &hw->nvm;
fp@2584: 	u32 eecd = er32(EECD);
fp@2584: 	u8 spi_stat_reg;
fp@2584: 
fp@2584: 	if (nvm->type == e1000_nvm_eeprom_spi) {
fp@2584: 		u16 timeout = NVM_MAX_RETRY_SPI;
fp@2584: 
fp@2584: 		/* Clear SK and CS */
fp@2584: 		eecd &= ~(E1000_EECD_CS | E1000_EECD_SK);
fp@2584: 		ew32(EECD, eecd);
fp@2584: 		e1e_flush();
fp@2584: 		udelay(1);
fp@2584: 
fp@2584: 		/* Read "Status Register" repeatedly until the LSB is cleared.
fp@2584: 		 * The EEPROM will signal that the command has been completed
fp@2584: 		 * by clearing bit 0 of the internal status register.  If it's
fp@2584: 		 * not cleared within 'timeout', then error out.
fp@2584: 		 */
fp@2584: 		while (timeout) {
fp@2584: 			e1000_shift_out_eec_bits(hw, NVM_RDSR_OPCODE_SPI,
fp@2584: 						 hw->nvm.opcode_bits);
fp@2584: 			spi_stat_reg = (u8)e1000_shift_in_eec_bits(hw, 8);
fp@2584: 			if (!(spi_stat_reg & NVM_STATUS_RDY_SPI))
fp@2584: 				break;
fp@2584: 
fp@2584: 			udelay(5);
fp@2584: 			e1000_standby_nvm(hw);
fp@2584: 			timeout--;
fp@2584: 		}
fp@2584: 
fp@2584: 		if (!timeout) {
fp@2584: 			e_dbg("SPI NVM Status error\n");
fp@2584: 			return -E1000_ERR_NVM;
fp@2584: 		}
fp@2584: 	}
fp@2584: 
fp@2584: 	return 0;
fp@2584: }
fp@2584: 
fp@2584: /**
fp@2584:  *  e1000e_read_nvm_eerd - Reads EEPROM using EERD register
fp@2584:  *  @hw: pointer to the HW structure
fp@2584:  *  @offset: offset of word in the EEPROM to read
fp@2584:  *  @words: number of words to read
fp@2584:  *  @data: word read from the EEPROM
fp@2584:  *
fp@2584:  *  Reads a 16 bit word from the EEPROM using the EERD register.
fp@2584:  **/
fp@2584: s32 e1000e_read_nvm_eerd(struct e1000_hw *hw, u16 offset, u16 words, u16 *data)
fp@2584: {
fp@2584: 	struct e1000_nvm_info *nvm = &hw->nvm;
fp@2584: 	u32 i, eerd = 0;
fp@2584: 	s32 ret_val = 0;
fp@2584: 
fp@2584: 	/* A check for invalid values:  offset too large, too many words,
fp@2584: 	 * too many words for the offset, and not enough words.
fp@2584: 	 */
fp@2584: 	if ((offset >= nvm->word_size) || (words > (nvm->word_size - offset)) ||
fp@2584: 	    (words == 0)) {
fp@2584: 		e_dbg("nvm parameter(s) out of bounds\n");
fp@2584: 		return -E1000_ERR_NVM;
fp@2584: 	}
fp@2584: 
fp@2584: 	for (i = 0; i < words; i++) {
fp@2584: 		eerd = ((offset + i) << E1000_NVM_RW_ADDR_SHIFT) +
fp@2584: 		    E1000_NVM_RW_REG_START;
fp@2584: 
fp@2584: 		ew32(EERD, eerd);
fp@2584: 		ret_val = e1000e_poll_eerd_eewr_done(hw, E1000_NVM_POLL_READ);
fp@2584: 		if (ret_val)
fp@2584: 			break;
fp@2584: 
fp@2584: 		data[i] = (er32(EERD) >> E1000_NVM_RW_REG_DATA);
fp@2584: 	}
fp@2584: 
fp@2584: 	return ret_val;
fp@2584: }
fp@2584: 
fp@2584: /**
fp@2584:  *  e1000e_write_nvm_spi - Write to EEPROM using SPI
fp@2584:  *  @hw: pointer to the HW structure
fp@2584:  *  @offset: offset within the EEPROM to be written to
fp@2584:  *  @words: number of words to write
fp@2584:  *  @data: 16 bit word(s) to be written to the EEPROM
fp@2584:  *
fp@2584:  *  Writes data to EEPROM at offset using SPI interface.
fp@2584:  *
fp@2584:  *  If e1000e_update_nvm_checksum is not called after this function , the
fp@2584:  *  EEPROM will most likely contain an invalid checksum.
fp@2584:  **/
fp@2584: s32 e1000e_write_nvm_spi(struct e1000_hw *hw, u16 offset, u16 words, u16 *data)
fp@2584: {
fp@2584: 	struct e1000_nvm_info *nvm = &hw->nvm;
fp@2584: 	s32 ret_val;
fp@2584: 	u16 widx = 0;
fp@2584: 
fp@2584: 	/* A check for invalid values:  offset too large, too many words,
fp@2584: 	 * and not enough words.
fp@2584: 	 */
fp@2584: 	if ((offset >= nvm->word_size) || (words > (nvm->word_size - offset)) ||
fp@2584: 	    (words == 0)) {
fp@2584: 		e_dbg("nvm parameter(s) out of bounds\n");
fp@2584: 		return -E1000_ERR_NVM;
fp@2584: 	}
fp@2584: 
fp@2584: 	ret_val = nvm->ops.acquire(hw);
fp@2584: 	if (ret_val)
fp@2584: 		return ret_val;
fp@2584: 
fp@2584: 	while (widx < words) {
fp@2584: 		u8 write_opcode = NVM_WRITE_OPCODE_SPI;
fp@2584: 
fp@2584: 		ret_val = e1000_ready_nvm_eeprom(hw);
fp@2584: 		if (ret_val)
fp@2584: 			goto release;
fp@2584: 
fp@2584: 		e1000_standby_nvm(hw);
fp@2584: 
fp@2584: 		/* Send the WRITE ENABLE command (8 bit opcode) */
fp@2584: 		e1000_shift_out_eec_bits(hw, NVM_WREN_OPCODE_SPI,
fp@2584: 					 nvm->opcode_bits);
fp@2584: 
fp@2584: 		e1000_standby_nvm(hw);
fp@2584: 
fp@2584: 		/* Some SPI eeproms use the 8th address bit embedded in the
fp@2584: 		 * opcode
fp@2584: 		 */
fp@2584: 		if ((nvm->address_bits == 8) && (offset >= 128))
fp@2584: 			write_opcode |= NVM_A8_OPCODE_SPI;
fp@2584: 
fp@2584: 		/* Send the Write command (8-bit opcode + addr) */
fp@2584: 		e1000_shift_out_eec_bits(hw, write_opcode, nvm->opcode_bits);
fp@2584: 		e1000_shift_out_eec_bits(hw, (u16)((offset + widx) * 2),
fp@2584: 					 nvm->address_bits);
fp@2584: 
fp@2584: 		/* Loop to allow for up to whole page write of eeprom */
fp@2584: 		while (widx < words) {
fp@2584: 			u16 word_out = data[widx];
fp@2584: 			word_out = (word_out >> 8) | (word_out << 8);
fp@2584: 			e1000_shift_out_eec_bits(hw, word_out, 16);
fp@2584: 			widx++;
fp@2584: 
fp@2584: 			if ((((offset + widx) * 2) % nvm->page_size) == 0) {
fp@2584: 				e1000_standby_nvm(hw);
fp@2584: 				break;
fp@2584: 			}
fp@2584: 		}
fp@2584: 	}
fp@2584: 
fp@2584: 	usleep_range(10000, 20000);
fp@2584: release:
fp@2584: 	nvm->ops.release(hw);
fp@2584: 
fp@2584: 	return ret_val;
fp@2584: }
fp@2584: 
fp@2584: /**
fp@2584:  *  e1000_read_pba_string_generic - Read device part number
fp@2584:  *  @hw: pointer to the HW structure
fp@2584:  *  @pba_num: pointer to device part number
fp@2584:  *  @pba_num_size: size of part number buffer
fp@2584:  *
fp@2584:  *  Reads the product board assembly (PBA) number from the EEPROM and stores
fp@2584:  *  the value in pba_num.
fp@2584:  **/
fp@2584: s32 e1000_read_pba_string_generic(struct e1000_hw *hw, u8 *pba_num,
fp@2584: 				  u32 pba_num_size)
fp@2584: {
fp@2584: 	s32 ret_val;
fp@2584: 	u16 nvm_data;
fp@2584: 	u16 pba_ptr;
fp@2584: 	u16 offset;
fp@2584: 	u16 length;
fp@2584: 
fp@2584: 	if (pba_num == NULL) {
fp@2584: 		e_dbg("PBA string buffer was null\n");
fp@2584: 		return -E1000_ERR_INVALID_ARGUMENT;
fp@2584: 	}
fp@2584: 
fp@2584: 	ret_val = e1000_read_nvm(hw, NVM_PBA_OFFSET_0, 1, &nvm_data);
fp@2584: 	if (ret_val) {
fp@2584: 		e_dbg("NVM Read Error\n");
fp@2584: 		return ret_val;
fp@2584: 	}
fp@2584: 
fp@2584: 	ret_val = e1000_read_nvm(hw, NVM_PBA_OFFSET_1, 1, &pba_ptr);
fp@2584: 	if (ret_val) {
fp@2584: 		e_dbg("NVM Read Error\n");
fp@2584: 		return ret_val;
fp@2584: 	}
fp@2584: 
fp@2584: 	/* if nvm_data is not ptr guard the PBA must be in legacy format which
fp@2584: 	 * means pba_ptr is actually our second data word for the PBA number
fp@2584: 	 * and we can decode it into an ascii string
fp@2584: 	 */
fp@2584: 	if (nvm_data != NVM_PBA_PTR_GUARD) {
fp@2584: 		e_dbg("NVM PBA number is not stored as string\n");
fp@2584: 
fp@2584: 		/* we will need 11 characters to store the PBA */
fp@2584: 		if (pba_num_size < 11) {
fp@2584: 			e_dbg("PBA string buffer too small\n");
fp@2584: 			return E1000_ERR_NO_SPACE;
fp@2584: 		}
fp@2584: 
fp@2584: 		/* extract hex string from data and pba_ptr */
fp@2584: 		pba_num[0] = (nvm_data >> 12) & 0xF;
fp@2584: 		pba_num[1] = (nvm_data >> 8) & 0xF;
fp@2584: 		pba_num[2] = (nvm_data >> 4) & 0xF;
fp@2584: 		pba_num[3] = nvm_data & 0xF;
fp@2584: 		pba_num[4] = (pba_ptr >> 12) & 0xF;
fp@2584: 		pba_num[5] = (pba_ptr >> 8) & 0xF;
fp@2584: 		pba_num[6] = '-';
fp@2584: 		pba_num[7] = 0;
fp@2584: 		pba_num[8] = (pba_ptr >> 4) & 0xF;
fp@2584: 		pba_num[9] = pba_ptr & 0xF;
fp@2584: 
fp@2584: 		/* put a null character on the end of our string */
fp@2584: 		pba_num[10] = '\0';
fp@2584: 
fp@2584: 		/* switch all the data but the '-' to hex char */
fp@2584: 		for (offset = 0; offset < 10; offset++) {
fp@2584: 			if (pba_num[offset] < 0xA)
fp@2584: 				pba_num[offset] += '0';
fp@2584: 			else if (pba_num[offset] < 0x10)
fp@2584: 				pba_num[offset] += 'A' - 0xA;
fp@2584: 		}
fp@2584: 
fp@2584: 		return 0;
fp@2584: 	}
fp@2584: 
fp@2584: 	ret_val = e1000_read_nvm(hw, pba_ptr, 1, &length);
fp@2584: 	if (ret_val) {
fp@2584: 		e_dbg("NVM Read Error\n");
fp@2584: 		return ret_val;
fp@2584: 	}
fp@2584: 
fp@2584: 	if (length == 0xFFFF || length == 0) {
fp@2584: 		e_dbg("NVM PBA number section invalid length\n");
fp@2584: 		return -E1000_ERR_NVM_PBA_SECTION;
fp@2584: 	}
fp@2584: 	/* check if pba_num buffer is big enough */
fp@2584: 	if (pba_num_size < (((u32)length * 2) - 1)) {
fp@2584: 		e_dbg("PBA string buffer too small\n");
fp@2584: 		return -E1000_ERR_NO_SPACE;
fp@2584: 	}
fp@2584: 
fp@2584: 	/* trim pba length from start of string */
fp@2584: 	pba_ptr++;
fp@2584: 	length--;
fp@2584: 
fp@2584: 	for (offset = 0; offset < length; offset++) {
fp@2584: 		ret_val = e1000_read_nvm(hw, pba_ptr + offset, 1, &nvm_data);
fp@2584: 		if (ret_val) {
fp@2584: 			e_dbg("NVM Read Error\n");
fp@2584: 			return ret_val;
fp@2584: 		}
fp@2584: 		pba_num[offset * 2] = (u8)(nvm_data >> 8);
fp@2584: 		pba_num[(offset * 2) + 1] = (u8)(nvm_data & 0xFF);
fp@2584: 	}
fp@2584: 	pba_num[offset * 2] = '\0';
fp@2584: 
fp@2584: 	return 0;
fp@2584: }
fp@2584: 
fp@2584: /**
fp@2584:  *  e1000_read_mac_addr_generic - Read device MAC address
fp@2584:  *  @hw: pointer to the HW structure
fp@2584:  *
fp@2584:  *  Reads the device MAC address from the EEPROM and stores the value.
fp@2584:  *  Since devices with two ports use the same EEPROM, we increment the
fp@2584:  *  last bit in the MAC address for the second port.
fp@2584:  **/
fp@2584: s32 e1000_read_mac_addr_generic(struct e1000_hw *hw)
fp@2584: {
fp@2584: 	u32 rar_high;
fp@2584: 	u32 rar_low;
fp@2584: 	u16 i;
fp@2584: 
fp@2584: 	rar_high = er32(RAH(0));
fp@2584: 	rar_low = er32(RAL(0));
fp@2584: 
fp@2584: 	for (i = 0; i < E1000_RAL_MAC_ADDR_LEN; i++)
fp@2584: 		hw->mac.perm_addr[i] = (u8)(rar_low >> (i * 8));
fp@2584: 
fp@2584: 	for (i = 0; i < E1000_RAH_MAC_ADDR_LEN; i++)
fp@2584: 		hw->mac.perm_addr[i + 4] = (u8)(rar_high >> (i * 8));
fp@2584: 
fp@2584: 	for (i = 0; i < ETH_ALEN; i++)
fp@2584: 		hw->mac.addr[i] = hw->mac.perm_addr[i];
fp@2584: 
fp@2584: 	return 0;
fp@2584: }
fp@2584: 
fp@2584: /**
fp@2584:  *  e1000e_validate_nvm_checksum_generic - Validate EEPROM checksum
fp@2584:  *  @hw: pointer to the HW structure
fp@2584:  *
fp@2584:  *  Calculates the EEPROM checksum by reading/adding each word of the EEPROM
fp@2584:  *  and then verifies that the sum of the EEPROM is equal to 0xBABA.
fp@2584:  **/
fp@2584: s32 e1000e_validate_nvm_checksum_generic(struct e1000_hw *hw)
fp@2584: {
fp@2584: 	s32 ret_val;
fp@2584: 	u16 checksum = 0;
fp@2584: 	u16 i, nvm_data;
fp@2584: 
fp@2584: 	for (i = 0; i < (NVM_CHECKSUM_REG + 1); i++) {
fp@2584: 		ret_val = e1000_read_nvm(hw, i, 1, &nvm_data);
fp@2584: 		if (ret_val) {
fp@2584: 			e_dbg("NVM Read Error\n");
fp@2584: 			return ret_val;
fp@2584: 		}
fp@2584: 		checksum += nvm_data;
fp@2584: 	}
fp@2584: 
fp@2584: 	if (checksum != (u16)NVM_SUM) {
fp@2584: 		e_dbg("NVM Checksum Invalid\n");
fp@2584: 		return -E1000_ERR_NVM;
fp@2584: 	}
fp@2584: 
fp@2584: 	return 0;
fp@2584: }
fp@2584: 
fp@2584: /**
fp@2584:  *  e1000e_update_nvm_checksum_generic - Update EEPROM checksum
fp@2584:  *  @hw: pointer to the HW structure
fp@2584:  *
fp@2584:  *  Updates the EEPROM checksum by reading/adding each word of the EEPROM
fp@2584:  *  up to the checksum.  Then calculates the EEPROM checksum and writes the
fp@2584:  *  value to the EEPROM.
fp@2584:  **/
fp@2584: s32 e1000e_update_nvm_checksum_generic(struct e1000_hw *hw)
fp@2584: {
fp@2584: 	s32 ret_val;
fp@2584: 	u16 checksum = 0;
fp@2584: 	u16 i, nvm_data;
fp@2584: 
fp@2584: 	for (i = 0; i < NVM_CHECKSUM_REG; i++) {
fp@2584: 		ret_val = e1000_read_nvm(hw, i, 1, &nvm_data);
fp@2584: 		if (ret_val) {
fp@2584: 			e_dbg("NVM Read Error while updating checksum.\n");
fp@2584: 			return ret_val;
fp@2584: 		}
fp@2584: 		checksum += nvm_data;
fp@2584: 	}
fp@2584: 	checksum = (u16)NVM_SUM - checksum;
fp@2584: 	ret_val = e1000_write_nvm(hw, NVM_CHECKSUM_REG, 1, &checksum);
fp@2584: 	if (ret_val)
fp@2584: 		e_dbg("NVM Write Error while updating checksum.\n");
fp@2584: 
fp@2584: 	return ret_val;
fp@2584: }
fp@2584: 
fp@2584: /**
fp@2584:  *  e1000e_reload_nvm_generic - Reloads EEPROM
fp@2584:  *  @hw: pointer to the HW structure
fp@2584:  *
fp@2584:  *  Reloads the EEPROM by setting the "Reinitialize from EEPROM" bit in the
fp@2584:  *  extended control register.
fp@2584:  **/
fp@2584: void e1000e_reload_nvm_generic(struct e1000_hw *hw)
fp@2584: {
fp@2584: 	u32 ctrl_ext;
fp@2584: 
fp@2584: 	udelay(10);
fp@2584: 	ctrl_ext = er32(CTRL_EXT);
fp@2584: 	ctrl_ext |= E1000_CTRL_EXT_EE_RST;
fp@2584: 	ew32(CTRL_EXT, ctrl_ext);
fp@2584: 	e1e_flush();
fp@2584: }