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kernel-aes67/drivers/net/ixgb/ixgb_ee.c
Malli Chilakala abf481d6af [PATCH] ixgb: Fix EEPROM functions to be endian-aware 
Fix EEPROM functions to be endian-aware

Signed-off-by: Mallikarjuna R Chilakala <mallikarjuna.chilakala@intel.com>
Signed-off-by: Ganesh Venkatesan <ganesh.venkatesan@intel.com>
Signed-off-by: John Ronciak <john.ronciak@intel.com>

diff -up net-drivers-2.6/drivers/net/ixgb/ixgb_ee.c net-drivers-2.6/drivers/net/ixgb.new/ixgb_ee.c
2005-05-12 20:54:41 -04:00

775 lines
22 KiB
C
Raw Blame History

/*******************************************************************************
Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your option)
any later version.
This program is distributed in the hope that 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, write to the Free Software Foundation, Inc., 59
Temple Place - Suite 330, Boston, MA 02111-1307, USA.
The full GNU General Public License is included in this distribution in the
file called LICENSE.
Contact Information:
Linux NICS <linux.nics@intel.com>
Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*******************************************************************************/
#include "ixgb_hw.h"
#include "ixgb_ee.h"
/* Local prototypes */
static uint16_t ixgb_shift_in_bits(struct ixgb_hw *hw);
static void ixgb_shift_out_bits(struct ixgb_hw *hw,
uint16_t data,
uint16_t count);
static void ixgb_standby_eeprom(struct ixgb_hw *hw);
static boolean_t ixgb_wait_eeprom_command(struct ixgb_hw *hw);
static void ixgb_cleanup_eeprom(struct ixgb_hw *hw);
/******************************************************************************
* Raises the EEPROM's clock input.
*
* hw - Struct containing variables accessed by shared code
* eecd_reg - EECD's current value
*****************************************************************************/
static void
ixgb_raise_clock(struct ixgb_hw *hw,
uint32_t *eecd_reg)
{
/* Raise the clock input to the EEPROM (by setting the SK bit), and then
* wait 50 microseconds.
*/
*eecd_reg = *eecd_reg | IXGB_EECD_SK;
IXGB_WRITE_REG(hw, EECD, *eecd_reg);
udelay(50);
return;
}
/******************************************************************************
* Lowers the EEPROM's clock input.
*
* hw - Struct containing variables accessed by shared code
* eecd_reg - EECD's current value
*****************************************************************************/
static void
ixgb_lower_clock(struct ixgb_hw *hw,
uint32_t *eecd_reg)
{
/* Lower the clock input to the EEPROM (by clearing the SK bit), and then
* wait 50 microseconds.
*/
*eecd_reg = *eecd_reg & ~IXGB_EECD_SK;
IXGB_WRITE_REG(hw, EECD, *eecd_reg);
udelay(50);
return;
}
/******************************************************************************
* 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
*****************************************************************************/
static void
ixgb_shift_out_bits(struct ixgb_hw *hw,
uint16_t data,
uint16_t count)
{
uint32_t eecd_reg;
uint32_t 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_reg = IXGB_READ_REG(hw, EECD);
eecd_reg &= ~(IXGB_EECD_DO | IXGB_EECD_DI);
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_reg &= ~IXGB_EECD_DI;
if(data & mask)
eecd_reg |= IXGB_EECD_DI;
IXGB_WRITE_REG(hw, EECD, eecd_reg);
udelay(50);
ixgb_raise_clock(hw, &eecd_reg);
ixgb_lower_clock(hw, &eecd_reg);
mask = mask >> 1;
} while(mask);
/* We leave the "DI" bit set to "0" when we leave this routine. */
eecd_reg &= ~IXGB_EECD_DI;
IXGB_WRITE_REG(hw, EECD, eecd_reg);
return;
}
/******************************************************************************
* Shift data bits in from the EEPROM
*
* hw - Struct containing variables accessed by shared code
*****************************************************************************/
static uint16_t
ixgb_shift_in_bits(struct ixgb_hw *hw)
{
uint32_t eecd_reg;
uint32_t i;
uint16_t data;
/* In order to read a register from the EEPROM, we need to shift 16 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_reg = IXGB_READ_REG(hw, EECD);
eecd_reg &= ~(IXGB_EECD_DO | IXGB_EECD_DI);
data = 0;
for(i = 0; i < 16; i++) {
data = data << 1;
ixgb_raise_clock(hw, &eecd_reg);
eecd_reg = IXGB_READ_REG(hw, EECD);
eecd_reg &= ~(IXGB_EECD_DI);
if(eecd_reg & IXGB_EECD_DO)
data |= 1;
ixgb_lower_clock(hw, &eecd_reg);
}
return data;
}
/******************************************************************************
* 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 void
ixgb_setup_eeprom(struct ixgb_hw *hw)
{
uint32_t eecd_reg;
eecd_reg = IXGB_READ_REG(hw, EECD);
/* Clear SK and DI */
eecd_reg &= ~(IXGB_EECD_SK | IXGB_EECD_DI);
IXGB_WRITE_REG(hw, EECD, eecd_reg);
/* Set CS */
eecd_reg |= IXGB_EECD_CS;
IXGB_WRITE_REG(hw, EECD, eecd_reg);
return;
}
/******************************************************************************
* Returns EEPROM to a "standby" state
*
* hw - Struct containing variables accessed by shared code
*****************************************************************************/
static void
ixgb_standby_eeprom(struct ixgb_hw *hw)
{
uint32_t eecd_reg;
eecd_reg = IXGB_READ_REG(hw, EECD);
/* Deselct EEPROM */
eecd_reg &= ~(IXGB_EECD_CS | IXGB_EECD_SK);
IXGB_WRITE_REG(hw, EECD, eecd_reg);
udelay(50);
/* Clock high */
eecd_reg |= IXGB_EECD_SK;
IXGB_WRITE_REG(hw, EECD, eecd_reg);
udelay(50);
/* Select EEPROM */
eecd_reg |= IXGB_EECD_CS;
IXGB_WRITE_REG(hw, EECD, eecd_reg);
udelay(50);
/* Clock low */
eecd_reg &= ~IXGB_EECD_SK;
IXGB_WRITE_REG(hw, EECD, eecd_reg);
udelay(50);
return;
}
/******************************************************************************
* Raises then lowers the EEPROM's clock pin
*
* hw - Struct containing variables accessed by shared code
*****************************************************************************/
static void
ixgb_clock_eeprom(struct ixgb_hw *hw)
{
uint32_t eecd_reg;
eecd_reg = IXGB_READ_REG(hw, EECD);
/* Rising edge of clock */
eecd_reg |= IXGB_EECD_SK;
IXGB_WRITE_REG(hw, EECD, eecd_reg);
udelay(50);
/* Falling edge of clock */
eecd_reg &= ~IXGB_EECD_SK;
IXGB_WRITE_REG(hw, EECD, eecd_reg);
udelay(50);
return;
}
/******************************************************************************
* Terminates a command by lowering the EEPROM's chip select pin
*
* hw - Struct containing variables accessed by shared code
*****************************************************************************/
static void
ixgb_cleanup_eeprom(struct ixgb_hw *hw)
{
uint32_t eecd_reg;
eecd_reg = IXGB_READ_REG(hw, EECD);
eecd_reg &= ~(IXGB_EECD_CS | IXGB_EECD_DI);
IXGB_WRITE_REG(hw, EECD, eecd_reg);
ixgb_clock_eeprom(hw);
return;
}
/******************************************************************************
* Waits for the EEPROM to finish the current command.
*
* hw - Struct containing variables accessed by shared code
*
* The command is done when the EEPROM's data out pin goes high.
*
* Returns:
* TRUE: EEPROM data pin is high before timeout.
* FALSE: Time expired.
*****************************************************************************/
static boolean_t
ixgb_wait_eeprom_command(struct ixgb_hw *hw)
{
uint32_t eecd_reg;
uint32_t i;
/* Toggle the CS line. This in effect tells to EEPROM to actually execute
* the command in question.
*/
ixgb_standby_eeprom(hw);
/* Now read DO repeatedly until is high (equal to '1'). The EEEPROM 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_reg = IXGB_READ_REG(hw, EECD);
if(eecd_reg & IXGB_EECD_DO)
return (TRUE);
udelay(50);
}
ASSERT(0);
return (FALSE);
}
/******************************************************************************
* 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 the sum of the 64 16 bit words is 0xBABA, the EEPROM's checksum is
* valid.
*
* Returns:
* TRUE: Checksum is valid
* FALSE: Checksum is not valid.
*****************************************************************************/
boolean_t
ixgb_validate_eeprom_checksum(struct ixgb_hw *hw)
{
uint16_t checksum = 0;
uint16_t i;
for(i = 0; i < (EEPROM_CHECKSUM_REG + 1); i++)
checksum += ixgb_read_eeprom(hw, i);
if(checksum == (uint16_t) EEPROM_SUM)
return (TRUE);
else
return (FALSE);
}
/******************************************************************************
* Calculates the EEPROM checksum and writes it to the EEPROM
*
* 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.
*****************************************************************************/
void
ixgb_update_eeprom_checksum(struct ixgb_hw *hw)
{
uint16_t checksum = 0;
uint16_t i;
for(i = 0; i < EEPROM_CHECKSUM_REG; i++)
checksum += ixgb_read_eeprom(hw, i);
checksum = (uint16_t) EEPROM_SUM - checksum;
ixgb_write_eeprom(hw, EEPROM_CHECKSUM_REG, checksum);
return;
}
/******************************************************************************
* Writes a 16 bit word to a given offset in the EEPROM.
*
* hw - Struct containing variables accessed by shared code
* reg - offset within the EEPROM to be written to
* data - 16 bit word to be writen to the EEPROM
*
* If ixgb_update_eeprom_checksum is not called after this function, the
* EEPROM will most likely contain an invalid checksum.
*
*****************************************************************************/
void
ixgb_write_eeprom(struct ixgb_hw *hw, uint16_t offset, uint16_t data)
{
struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom;
/* Prepare the EEPROM for writing */
ixgb_setup_eeprom(hw);
/* Send the 9-bit EWEN (write enable) command to the EEPROM (5-bit opcode
* plus 4-bit dummy). This puts the EEPROM into write/erase mode.
*/
ixgb_shift_out_bits(hw, EEPROM_EWEN_OPCODE, 5);
ixgb_shift_out_bits(hw, 0, 4);
/* Prepare the EEPROM */
ixgb_standby_eeprom(hw);
/* Send the Write command (3-bit opcode + 6-bit addr) */
ixgb_shift_out_bits(hw, EEPROM_WRITE_OPCODE, 3);
ixgb_shift_out_bits(hw, offset, 6);
/* Send the data */
ixgb_shift_out_bits(hw, data, 16);
ixgb_wait_eeprom_command(hw);
/* Recover from write */
ixgb_standby_eeprom(hw);
/* Send the 9-bit EWDS (write disable) command to the EEPROM (5-bit
* opcode plus 4-bit dummy). This takes the EEPROM out of write/erase
* mode.
*/
ixgb_shift_out_bits(hw, EEPROM_EWDS_OPCODE, 5);
ixgb_shift_out_bits(hw, 0, 4);
/* Done with writing */
ixgb_cleanup_eeprom(hw);
/* clear the init_ctrl_reg_1 to signify that the cache is invalidated */
ee_map->init_ctrl_reg_1 = le16_to_cpu(EEPROM_ICW1_SIGNATURE_CLEAR);
return;
}
/******************************************************************************
* Reads a 16 bit word from the EEPROM.
*
* hw - Struct containing variables accessed by shared code
* offset - offset of 16 bit word in the EEPROM to read
*
* Returns:
* The 16-bit value read from the eeprom
*****************************************************************************/
uint16_t
ixgb_read_eeprom(struct ixgb_hw *hw,
uint16_t offset)
{
uint16_t data;
/* Prepare the EEPROM for reading */
ixgb_setup_eeprom(hw);
/* Send the READ command (opcode + addr) */
ixgb_shift_out_bits(hw, EEPROM_READ_OPCODE, 3);
/*
* We have a 64 word EEPROM, there are 6 address bits
*/
ixgb_shift_out_bits(hw, offset, 6);
/* Read the data */
data = ixgb_shift_in_bits(hw);
/* End this read operation */
ixgb_standby_eeprom(hw);
return (data);
}
/******************************************************************************
* Reads eeprom and stores data in shared structure.
* Validates eeprom checksum and eeprom signature.
*
* hw - Struct containing variables accessed by shared code
*
* Returns:
* TRUE: if eeprom read is successful
* FALSE: otherwise.
*****************************************************************************/
boolean_t
ixgb_get_eeprom_data(struct ixgb_hw *hw)
{
uint16_t i;
uint16_t checksum = 0;
struct ixgb_ee_map_type *ee_map;
DEBUGFUNC("ixgb_get_eeprom_data");
ee_map = (struct ixgb_ee_map_type *)hw->eeprom;
DEBUGOUT("ixgb_ee: Reading eeprom data\n");
for(i = 0; i < IXGB_EEPROM_SIZE ; i++) {
uint16_t ee_data;
ee_data = ixgb_read_eeprom(hw, i);
checksum += ee_data;
hw->eeprom[i] = le16_to_cpu(ee_data);
}
if (checksum != (uint16_t) EEPROM_SUM) {
DEBUGOUT("ixgb_ee: Checksum invalid.\n");
/* clear the init_ctrl_reg_1 to signify that the cache is
* invalidated */
ee_map->init_ctrl_reg_1 = le16_to_cpu(EEPROM_ICW1_SIGNATURE_CLEAR);
return (FALSE);
}
if ((ee_map->init_ctrl_reg_1 & le16_to_cpu(EEPROM_ICW1_SIGNATURE_MASK))
!= le16_to_cpu(EEPROM_ICW1_SIGNATURE_VALID)) {
DEBUGOUT("ixgb_ee: Signature invalid.\n");
return(FALSE);
}
return(TRUE);
}
/******************************************************************************
* Local function to check if the eeprom signature is good
* If the eeprom signature is good, calls ixgb)get_eeprom_data.
*
* hw - Struct containing variables accessed by shared code
*
* Returns:
* TRUE: eeprom signature was good and the eeprom read was successful
* FALSE: otherwise.
******************************************************************************/
static boolean_t
ixgb_check_and_get_eeprom_data (struct ixgb_hw* hw)
{
struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom;
if ((ee_map->init_ctrl_reg_1 & le16_to_cpu(EEPROM_ICW1_SIGNATURE_MASK))
== le16_to_cpu(EEPROM_ICW1_SIGNATURE_VALID)) {
return (TRUE);
} else {
return ixgb_get_eeprom_data(hw);
}
}
/******************************************************************************
* return a word from the eeprom
*
* hw - Struct containing variables accessed by shared code
* index - Offset of eeprom word
*
* Returns:
* Word at indexed offset in eeprom, if valid, 0 otherwise.
******************************************************************************/
uint16_t
ixgb_get_eeprom_word(struct ixgb_hw *hw, uint16_t index)
{
if ((index < IXGB_EEPROM_SIZE) &&
(ixgb_check_and_get_eeprom_data(hw) == TRUE)) {
return(hw->eeprom[index]);
}
return(0);
}
/******************************************************************************
* return the mac address from EEPROM
*
* hw - Struct containing variables accessed by shared code
* mac_addr - Ethernet Address if EEPROM contents are valid, 0 otherwise
*
* Returns: None.
******************************************************************************/
void
ixgb_get_ee_mac_addr(struct ixgb_hw *hw,
uint8_t *mac_addr)
{
int i;
struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom;
DEBUGFUNC("ixgb_get_ee_mac_addr");
if (ixgb_check_and_get_eeprom_data(hw) == TRUE) {
for (i = 0; i < IXGB_ETH_LENGTH_OF_ADDRESS; i++) {
mac_addr[i] = ee_map->mac_addr[i];
DEBUGOUT2("mac(%d) = %.2X\n", i, mac_addr[i]);
}
}
}
/******************************************************************************
* return the compatibility flags from EEPROM
*
* hw - Struct containing variables accessed by shared code
*
* Returns:
* compatibility flags if EEPROM contents are valid, 0 otherwise
******************************************************************************/
uint16_t
ixgb_get_ee_compatibility(struct ixgb_hw *hw)
{
struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom;
if(ixgb_check_and_get_eeprom_data(hw) == TRUE)
return (le16_to_cpu(ee_map->compatibility));
return(0);
}
/******************************************************************************
* return the Printed Board Assembly number from EEPROM
*
* hw - Struct containing variables accessed by shared code
*
* Returns:
* PBA number if EEPROM contents are valid, 0 otherwise
******************************************************************************/
uint32_t
ixgb_get_ee_pba_number(struct ixgb_hw *hw)
{
if(ixgb_check_and_get_eeprom_data(hw) == TRUE)
return (le16_to_cpu(hw->eeprom[EEPROM_PBA_1_2_REG])
| (le16_to_cpu(hw->eeprom[EEPROM_PBA_3_4_REG])<<16));
return(0);
}
/******************************************************************************
* return the Initialization Control Word 1 from EEPROM
*
* hw - Struct containing variables accessed by shared code
*
* Returns:
* Initialization Control Word 1 if EEPROM contents are valid, 0 otherwise
******************************************************************************/
uint16_t
ixgb_get_ee_init_ctrl_reg_1(struct ixgb_hw *hw)
{
struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom;
if(ixgb_check_and_get_eeprom_data(hw) == TRUE)
return (le16_to_cpu(ee_map->init_ctrl_reg_1));
return(0);
}
/******************************************************************************
* return the Initialization Control Word 2 from EEPROM
*
* hw - Struct containing variables accessed by shared code
*
* Returns:
* Initialization Control Word 2 if EEPROM contents are valid, 0 otherwise
******************************************************************************/
uint16_t
ixgb_get_ee_init_ctrl_reg_2(struct ixgb_hw *hw)
{
struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom;
if(ixgb_check_and_get_eeprom_data(hw) == TRUE)
return (le16_to_cpu(ee_map->init_ctrl_reg_2));
return(0);
}
/******************************************************************************
* return the Subsystem Id from EEPROM
*
* hw - Struct containing variables accessed by shared code
*
* Returns:
* Subsystem Id if EEPROM contents are valid, 0 otherwise
******************************************************************************/
uint16_t
ixgb_get_ee_subsystem_id(struct ixgb_hw *hw)
{
struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom;
if(ixgb_check_and_get_eeprom_data(hw) == TRUE)
return (le16_to_cpu(ee_map->subsystem_id));
return(0);
}
/******************************************************************************
* return the Sub Vendor Id from EEPROM
*
* hw - Struct containing variables accessed by shared code
*
* Returns:
* Sub Vendor Id if EEPROM contents are valid, 0 otherwise
******************************************************************************/
uint16_t
ixgb_get_ee_subvendor_id(struct ixgb_hw *hw)
{
struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom;
if(ixgb_check_and_get_eeprom_data(hw) == TRUE)
return (le16_to_cpu(ee_map->subvendor_id));
return(0);
}
/******************************************************************************
* return the Device Id from EEPROM
*
* hw - Struct containing variables accessed by shared code
*
* Returns:
* Device Id if EEPROM contents are valid, 0 otherwise
******************************************************************************/
uint16_t
ixgb_get_ee_device_id(struct ixgb_hw *hw)
{
struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom;
if(ixgb_check_and_get_eeprom_data(hw) == TRUE)
return (le16_to_cpu(ee_map->device_id));
return(0);
}
/******************************************************************************
* return the Vendor Id from EEPROM
*
* hw - Struct containing variables accessed by shared code
*
* Returns:
* Device Id if EEPROM contents are valid, 0 otherwise
******************************************************************************/
uint16_t
ixgb_get_ee_vendor_id(struct ixgb_hw *hw)
{
struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom;
if(ixgb_check_and_get_eeprom_data(hw) == TRUE)
return (le16_to_cpu(ee_map->vendor_id));
return(0);
}
/******************************************************************************
* return the Software Defined Pins Register from EEPROM
*
* hw - Struct containing variables accessed by shared code
*
* Returns:
* SDP Register if EEPROM contents are valid, 0 otherwise
******************************************************************************/
uint16_t
ixgb_get_ee_swdpins_reg(struct ixgb_hw *hw)
{
struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom;
if(ixgb_check_and_get_eeprom_data(hw) == TRUE)
return (le16_to_cpu(ee_map->swdpins_reg));
return(0);
}
/******************************************************************************
* return the D3 Power Management Bits from EEPROM
*
* hw - Struct containing variables accessed by shared code
*
* Returns:
* D3 Power Management Bits if EEPROM contents are valid, 0 otherwise
******************************************************************************/
uint8_t
ixgb_get_ee_d3_power(struct ixgb_hw *hw)
{
struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom;
if(ixgb_check_and_get_eeprom_data(hw) == TRUE)
return (le16_to_cpu(ee_map->d3_power));
return(0);
}
/******************************************************************************
* return the D0 Power Management Bits from EEPROM
*
* hw - Struct containing variables accessed by shared code
*
* Returns:
* D0 Power Management Bits if EEPROM contents are valid, 0 otherwise
******************************************************************************/
uint8_t
ixgb_get_ee_d0_power(struct ixgb_hw *hw)
{
struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom;
if(ixgb_check_and_get_eeprom_data(hw) == TRUE)
return (le16_to_cpu(ee_map->d0_power));
return(0);
}
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