/*
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* rtl8712_efuse.c
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*
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* Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
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* Linux device driver for RTL8192SU
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
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*
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* Modifications for inclusion into the Linux staging tree are
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* Copyright(c) 2010 Larry Finger. All rights reserved.
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*
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* Contact information:
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* WLAN FAE <wlanfae@realtek.com>.
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* Larry Finger <Larry.Finger@lwfinger.net>
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*
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******************************************************************************/
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#define _RTL8712_EFUSE_C_
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#include "osdep_service.h"
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#include "drv_types.h"
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#include "rtl8712_efuse.h"
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/* reserve 3 bytes for HW stop read */
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static int efuse_available_max_size = EFUSE_MAX_SIZE - 3 /*0x1FD*/;
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static void efuse_reg_ctrl(struct _adapter *padapter, u8 bPowerOn)
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{
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u8 tmpu8 = 0;
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if (bPowerOn) {
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/* -----------------e-fuse pwr & clk reg ctrl ---------------
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* Enable LDOE25 Macro Block
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*/
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tmpu8 = r8712_read8(padapter, EFUSE_TEST + 3);
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tmpu8 |= 0x80;
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r8712_write8(padapter, EFUSE_TEST + 3, tmpu8);
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msleep(20); /* for some platform , need some delay time */
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/* Change Efuse Clock for write action to 40MHZ */
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r8712_write8(padapter, EFUSE_CLK_CTRL, 0x03);
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msleep(20); /* for some platform , need some delay time */
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} else {
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/* -----------------e-fuse pwr & clk reg ctrl -----------------
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* Disable LDOE25 Macro Block
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*/
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tmpu8 = r8712_read8(padapter, EFUSE_TEST + 3);
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tmpu8 &= 0x7F;
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r8712_write8(padapter, EFUSE_TEST + 3, tmpu8);
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/* Change Efuse Clock for write action to 500K */
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r8712_write8(padapter, EFUSE_CLK_CTRL, 0x02);
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}
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}
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/*
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* Before write E-Fuse, this function must be called.
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*/
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u8 r8712_efuse_reg_init(struct _adapter *padapter)
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{
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return true;
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}
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void r8712_efuse_reg_uninit(struct _adapter *padapter)
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{
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efuse_reg_ctrl(padapter, false);
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}
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static u8 efuse_one_byte_read(struct _adapter *padapter, u16 addr, u8 *data)
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{
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u8 tmpidx = 0, bResult;
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/* -----------------e-fuse reg ctrl --------------------------------- */
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r8712_write8(padapter, EFUSE_CTRL + 1, (u8)(addr & 0xFF)); /* address */
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r8712_write8(padapter, EFUSE_CTRL + 2, ((u8)((addr >> 8) & 0x03)) |
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(r8712_read8(padapter, EFUSE_CTRL + 2) & 0xFC));
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r8712_write8(padapter, EFUSE_CTRL + 3, 0x72); /* read cmd */
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/* wait for complete */
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while (!(0x80 & r8712_read8(padapter, EFUSE_CTRL + 3)) &&
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(tmpidx < 100))
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tmpidx++;
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if (tmpidx < 100) {
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*data = r8712_read8(padapter, EFUSE_CTRL);
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bResult = true;
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} else {
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*data = 0xff;
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bResult = false;
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}
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return bResult;
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}
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static u8 efuse_one_byte_write(struct _adapter *padapter, u16 addr, u8 data)
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{
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u8 tmpidx = 0, bResult;
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/* -----------------e-fuse reg ctrl -------------------------------- */
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r8712_write8(padapter, EFUSE_CTRL + 1, (u8)(addr & 0xFF)); /* address */
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r8712_write8(padapter, EFUSE_CTRL + 2, ((u8)((addr >> 8) & 0x03)) |
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(r8712_read8(padapter, EFUSE_CTRL + 2) & 0xFC));
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r8712_write8(padapter, EFUSE_CTRL, data); /* data */
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r8712_write8(padapter, EFUSE_CTRL + 3, 0xF2); /* write cmd */
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/* wait for complete */
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while ((0x80 & r8712_read8(padapter, EFUSE_CTRL + 3)) &&
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(tmpidx < 100))
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tmpidx++;
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if (tmpidx < 100)
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bResult = true;
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else
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bResult = false;
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return bResult;
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}
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static u8 efuse_one_byte_rw(struct _adapter *padapter, u8 bRead, u16 addr,
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u8 *data)
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{
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u8 tmpidx = 0, tmpv8 = 0, bResult;
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/* -----------------e-fuse reg ctrl --------------------------------- */
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r8712_write8(padapter, EFUSE_CTRL + 1, (u8)(addr & 0xFF)); /* address */
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tmpv8 = ((u8)((addr >> 8) & 0x03)) |
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(r8712_read8(padapter, EFUSE_CTRL + 2) & 0xFC);
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r8712_write8(padapter, EFUSE_CTRL + 2, tmpv8);
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if (bRead) {
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r8712_write8(padapter, EFUSE_CTRL + 3, 0x72); /* read cmd */
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while (!(0x80 & r8712_read8(padapter, EFUSE_CTRL + 3)) &&
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(tmpidx < 100))
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tmpidx++;
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if (tmpidx < 100) {
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*data = r8712_read8(padapter, EFUSE_CTRL);
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bResult = true;
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} else {
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*data = 0;
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bResult = false;
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}
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} else {
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r8712_write8(padapter, EFUSE_CTRL, *data); /* data */
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r8712_write8(padapter, EFUSE_CTRL + 3, 0xF2); /* write cmd */
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while ((0x80 & r8712_read8(padapter, EFUSE_CTRL + 3)) &&
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(tmpidx < 100))
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tmpidx++;
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if (tmpidx < 100)
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bResult = true;
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else
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bResult = false;
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}
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return bResult;
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}
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static u8 efuse_is_empty(struct _adapter *padapter, u8 *empty)
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{
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u8 value, ret = true;
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/* read one byte to check if E-Fuse is empty */
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if (efuse_one_byte_rw(padapter, true, 0, &value)) {
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if (value == 0xFF)
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*empty = true;
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else
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*empty = false;
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} else {
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ret = false;
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}
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return ret;
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}
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void r8712_efuse_change_max_size(struct _adapter *padapter)
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{
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u16 pre_pg_data_saddr = 0x1FB;
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u16 i;
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u16 pre_pg_data_size = 5;
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u8 pre_pg_data[5];
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for (i = 0; i < pre_pg_data_size; i++)
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efuse_one_byte_read(padapter, pre_pg_data_saddr + i,
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&pre_pg_data[i]);
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if ((pre_pg_data[0] == 0x03) && (pre_pg_data[1] == 0x00) &&
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(pre_pg_data[2] == 0x00) && (pre_pg_data[3] == 0x00) &&
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(pre_pg_data[4] == 0x0C))
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efuse_available_max_size -= pre_pg_data_size;
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}
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int r8712_efuse_get_max_size(struct _adapter *padapter)
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{
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return efuse_available_max_size;
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}
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static u8 calculate_word_cnts(const u8 word_en)
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{
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u8 word_cnts = 0;
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u8 word_idx;
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for (word_idx = 0; word_idx < PGPKG_MAX_WORDS; word_idx++)
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if (!(word_en & BIT(word_idx)))
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word_cnts++; /* 0 : write enable */
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return word_cnts;
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}
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static void pgpacket_copy_data(const u8 word_en, const u8 *sourdata,
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u8 *targetdata)
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{
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u8 tmpindex = 0;
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u8 word_idx, byte_idx;
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for (word_idx = 0; word_idx < PGPKG_MAX_WORDS; word_idx++) {
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if (!(word_en & BIT(word_idx))) {
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byte_idx = word_idx * 2;
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targetdata[byte_idx] = sourdata[tmpindex++];
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targetdata[byte_idx + 1] = sourdata[tmpindex++];
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}
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}
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}
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u16 r8712_efuse_get_current_size(struct _adapter *padapter)
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{
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int bContinual = true;
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u16 efuse_addr = 0;
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u8 hworden = 0;
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u8 efuse_data, word_cnts = 0;
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while (bContinual && efuse_one_byte_read(padapter, efuse_addr,
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&efuse_data) && (efuse_addr < efuse_available_max_size)) {
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if (efuse_data != 0xFF) {
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hworden = efuse_data & 0x0F;
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word_cnts = calculate_word_cnts(hworden);
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/* read next header */
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efuse_addr = efuse_addr + (word_cnts * 2) + 1;
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} else {
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bContinual = false;
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}
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}
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return efuse_addr;
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}
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u8 r8712_efuse_pg_packet_read(struct _adapter *padapter, u8 offset, u8 *data)
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{
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u8 hoffset = 0, hworden = 0, word_cnts = 0;
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u16 efuse_addr = 0;
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u8 efuse_data;
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u8 tmpidx = 0;
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u8 tmpdata[PGPKT_DATA_SIZE];
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u8 ret = true;
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if (!data)
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return false;
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if (offset > 0x0f)
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return false;
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memset(data, 0xFF, sizeof(u8) * PGPKT_DATA_SIZE);
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while (efuse_addr < efuse_available_max_size) {
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if (efuse_one_byte_read(padapter, efuse_addr, &efuse_data)) {
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if (efuse_data == 0xFF)
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break;
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hoffset = (efuse_data >> 4) & 0x0F;
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hworden = efuse_data & 0x0F;
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word_cnts = calculate_word_cnts(hworden);
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if (hoffset == offset) {
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memset(tmpdata, 0xFF, PGPKT_DATA_SIZE);
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for (tmpidx = 0; tmpidx < word_cnts * 2;
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tmpidx++) {
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if (efuse_one_byte_read(padapter,
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efuse_addr + 1 + tmpidx,
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&efuse_data)) {
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tmpdata[tmpidx] = efuse_data;
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} else {
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ret = false;
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}
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}
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pgpacket_copy_data(hworden, tmpdata, data);
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}
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efuse_addr += 1 + (word_cnts * 2);
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} else {
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ret = false;
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break;
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}
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}
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return ret;
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}
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static u8 fix_header(struct _adapter *padapter, u8 header, u16 header_addr)
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{
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struct PGPKT_STRUCT pkt;
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u8 offset, word_en, value;
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u16 addr;
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int i;
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u8 ret = true;
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pkt.offset = GET_EFUSE_OFFSET(header);
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pkt.word_en = GET_EFUSE_WORD_EN(header);
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addr = header_addr + 1 + calculate_word_cnts(pkt.word_en) * 2;
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if (addr > efuse_available_max_size)
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return false;
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/* retrieve original data */
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addr = 0;
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while (addr < header_addr) {
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if (!efuse_one_byte_read(padapter, addr++, &value)) {
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ret = false;
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break;
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}
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offset = GET_EFUSE_OFFSET(value);
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word_en = GET_EFUSE_WORD_EN(value);
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if (pkt.offset != offset) {
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addr += calculate_word_cnts(word_en) * 2;
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continue;
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}
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for (i = 0; i < PGPKG_MAX_WORDS; i++) {
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if (BIT(i) & word_en) {
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if (BIT(i) & pkt.word_en) {
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if (efuse_one_byte_read(
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padapter, addr,
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&value))
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pkt.data[i * 2] = value;
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else
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return false;
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if (efuse_one_byte_read(
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padapter,
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addr + 1,
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&value))
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pkt.data[i * 2 + 1] =
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value;
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else
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return false;
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}
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addr += 2;
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}
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}
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}
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if (addr != header_addr)
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return false;
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addr++;
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/* fill original data */
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for (i = 0; i < PGPKG_MAX_WORDS; i++) {
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if (BIT(i) & pkt.word_en) {
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efuse_one_byte_write(padapter, addr, pkt.data[i * 2]);
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efuse_one_byte_write(padapter, addr + 1,
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pkt.data[i * 2 + 1]);
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/* additional check */
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if (!efuse_one_byte_read(padapter, addr, &value)) {
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ret = false;
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} else if (pkt.data[i * 2] != value) {
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ret = false;
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if (value == 0xFF) /* write again */
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efuse_one_byte_write(padapter, addr,
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pkt.data[i * 2]);
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}
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if (!efuse_one_byte_read(padapter, addr + 1, &value)) {
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ret = false;
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} else if (pkt.data[i * 2 + 1] != value) {
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ret = false;
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if (value == 0xFF) /* write again */
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efuse_one_byte_write(padapter, addr + 1,
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pkt.data[i * 2 +
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1]);
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}
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}
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addr += 2;
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}
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return ret;
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}
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u8 r8712_efuse_pg_packet_write(struct _adapter *padapter, const u8 offset,
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const u8 word_en, const u8 *data)
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{
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u8 pg_header = 0;
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u16 efuse_addr = 0, curr_size = 0;
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u8 efuse_data, target_word_cnts = 0;
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static int repeat_times;
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int sub_repeat;
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u8 bResult = true;
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/* check if E-Fuse Clock Enable and E-Fuse Clock is 40M */
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efuse_data = r8712_read8(padapter, EFUSE_CLK_CTRL);
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if (efuse_data != 0x03)
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return false;
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pg_header = MAKE_EFUSE_HEADER(offset, word_en);
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target_word_cnts = calculate_word_cnts(word_en);
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repeat_times = 0;
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efuse_addr = 0;
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while (efuse_addr < efuse_available_max_size) {
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curr_size = r8712_efuse_get_current_size(padapter);
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if ((curr_size + 1 + target_word_cnts * 2) >
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efuse_available_max_size)
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return false; /*target_word_cnts + pg header(1 byte)*/
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efuse_addr = curr_size; /* current size is also the last addr*/
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efuse_one_byte_write(padapter, efuse_addr, pg_header); /*hdr*/
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sub_repeat = 0;
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/* check if what we read is what we write */
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while (!efuse_one_byte_read(padapter, efuse_addr,
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&efuse_data)) {
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if (++sub_repeat > _REPEAT_THRESHOLD_) {
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bResult = false; /* continue to blind write */
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break; /* continue to blind write */
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}
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}
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if ((sub_repeat > _REPEAT_THRESHOLD_) ||
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(pg_header == efuse_data)) {
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/* write header ok OR can't check header(creep) */
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u8 i;
|
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/* go to next address */
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efuse_addr++;
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for (i = 0; i < target_word_cnts * 2; i++) {
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efuse_one_byte_write(padapter,
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efuse_addr + i,
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*(data + i));
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if (!efuse_one_byte_read(padapter,
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efuse_addr + i,
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&efuse_data))
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bResult = false;
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else if (*(data + i) != efuse_data) /* fail */
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bResult = false;
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}
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break;
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}
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/* write header fail */
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bResult = false;
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if (efuse_data == 0xFF)
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return bResult; /* nothing damaged. */
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/* call rescue procedure */
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if (!fix_header(padapter, efuse_data, efuse_addr))
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return false; /* rescue fail */
|
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if (++repeat_times > _REPEAT_THRESHOLD_) /* fail */
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break;
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/* otherwise, take another risk... */
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}
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return bResult;
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}
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u8 r8712_efuse_access(struct _adapter *padapter, u8 bRead, u16 start_addr,
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u16 cnts, u8 *data)
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{
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int i;
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u8 res = true;
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if (start_addr > EFUSE_MAX_SIZE)
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return false;
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if (!bRead && ((start_addr + cnts) >
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efuse_available_max_size))
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return false;
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if (!bRead && !r8712_efuse_reg_init(padapter))
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return false;
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/* -----------------e-fuse one byte read / write ---------------------*/
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for (i = 0; i < cnts; i++) {
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if ((start_addr + i) > EFUSE_MAX_SIZE) {
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res = false;
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break;
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}
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res = efuse_one_byte_rw(padapter, bRead, start_addr + i,
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data + i);
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if (!bRead && !res)
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break;
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}
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if (!bRead)
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r8712_efuse_reg_uninit(padapter);
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return res;
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}
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u8 r8712_efuse_map_read(struct _adapter *padapter, u16 addr, u16 cnts, u8 *data)
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{
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u8 offset, ret = true;
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u8 pktdata[PGPKT_DATA_SIZE];
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int i, idx;
|
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if ((addr + cnts) > EFUSE_MAP_MAX_SIZE)
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return false;
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if (efuse_is_empty(padapter, &offset) && offset) {
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for (i = 0; i < cnts; i++)
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data[i] = 0xFF;
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return ret;
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}
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offset = (addr >> 3) & 0xF;
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ret = r8712_efuse_pg_packet_read(padapter, offset, pktdata);
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i = addr & 0x7; /* pktdata index */
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idx = 0; /* data index */
|
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do {
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for (; i < PGPKT_DATA_SIZE; i++) {
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data[idx++] = pktdata[i];
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if (idx == cnts)
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return ret;
|
}
|
offset++;
|
if (!r8712_efuse_pg_packet_read(padapter, offset, pktdata))
|
ret = false;
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i = 0;
|
} while (1);
|
return ret;
|
}
|
|
u8 r8712_efuse_map_write(struct _adapter *padapter, u16 addr, u16 cnts,
|
u8 *data)
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{
|
u8 offset, word_en, empty;
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u8 pktdata[PGPKT_DATA_SIZE], newdata[PGPKT_DATA_SIZE];
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int i, j, idx;
|
|
if ((addr + cnts) > EFUSE_MAP_MAX_SIZE)
|
return false;
|
/* check if E-Fuse Clock Enable and E-Fuse Clock is 40M */
|
empty = r8712_read8(padapter, EFUSE_CLK_CTRL);
|
if (empty != 0x03)
|
return false;
|
if (efuse_is_empty(padapter, &empty)) {
|
if (empty)
|
memset(pktdata, 0xFF, PGPKT_DATA_SIZE);
|
} else {
|
return false;
|
}
|
offset = (addr >> 3) & 0xF;
|
if (!empty)
|
if (!r8712_efuse_pg_packet_read(padapter, offset, pktdata))
|
return false;
|
word_en = 0xF;
|
memset(newdata, 0xFF, PGPKT_DATA_SIZE);
|
i = addr & 0x7; /* pktdata index */
|
j = 0; /* newdata index */
|
idx = 0; /* data index */
|
|
if (i & 0x1) {
|
/* odd start */
|
if (data[idx] != pktdata[i]) {
|
word_en &= ~BIT(i >> 1);
|
newdata[j++] = pktdata[i - 1];
|
newdata[j++] = data[idx];
|
}
|
i++;
|
idx++;
|
}
|
do {
|
for (; i < PGPKT_DATA_SIZE; i += 2) {
|
if ((cnts - idx) == 1) {
|
if (data[idx] != pktdata[i]) {
|
word_en &= ~BIT(i >> 1);
|
newdata[j++] = data[idx];
|
newdata[j++] = pktdata[1 + 1];
|
}
|
idx++;
|
break;
|
}
|
|
if ((data[idx] != pktdata[i]) || (data[idx + 1] !=
|
pktdata[i + 1])) {
|
word_en &= ~BIT(i >> 1);
|
newdata[j++] = data[idx];
|
newdata[j++] = data[idx + 1];
|
}
|
idx += 2;
|
|
if (idx == cnts)
|
break;
|
}
|
|
if (word_en != 0xF)
|
if (!r8712_efuse_pg_packet_write(padapter, offset,
|
word_en, newdata))
|
return false;
|
if (idx == cnts)
|
break;
|
offset++;
|
if (!empty)
|
if (!r8712_efuse_pg_packet_read(padapter, offset,
|
pktdata))
|
return false;
|
i = 0;
|
j = 0;
|
word_en = 0xF;
|
memset(newdata, 0xFF, PGPKT_DATA_SIZE);
|
} while (1);
|
|
return true;
|
}
|
