mirror of
https://github.com/lwfinger/rtl8188eu.git
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77d786b6e8
This version takes advantage of all the cleanups to the code. It has been modified to build on older kernels. Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
87 lines
2.3 KiB
C
87 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright(c) 2007 - 2011 Realtek Corporation. */
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#define _RTW_EFUSE_C_
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#include "../include/osdep_service.h"
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#include "../include/drv_types.h"
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#include "../include/rtw_efuse.h"
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#include "../include/rtl8188e_hal.h"
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/* */
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/* Description: */
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/* Execute E-Fuse read byte operation. */
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/* Referred from SD1 Richard. */
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/* */
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/* Assumption: */
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/* 1. Boot from E-Fuse and successfully auto-load. */
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/* 2. PASSIVE_LEVEL (USB interface) */
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/* */
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/* Created by Roger, 2008.10.21. */
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/* */
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void
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ReadEFuseByte(
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struct adapter *Adapter,
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u16 _offset,
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u8 *pbuf)
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{
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u32 value32;
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u8 readbyte;
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u16 retry;
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/* Write Address */
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rtw_write8(Adapter, EFUSE_CTRL + 1, (_offset & 0xff));
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readbyte = rtw_read8(Adapter, EFUSE_CTRL + 2);
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rtw_write8(Adapter, EFUSE_CTRL + 2, ((_offset >> 8) & 0x03) | (readbyte & 0xfc));
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/* Write bit 32 0 */
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readbyte = rtw_read8(Adapter, EFUSE_CTRL + 3);
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rtw_write8(Adapter, EFUSE_CTRL + 3, (readbyte & 0x7f));
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/* Check bit 32 read-ready */
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retry = 0;
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value32 = rtw_read32(Adapter, EFUSE_CTRL);
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while (!(((value32 >> 24) & 0xff) & 0x80) && (retry < 10000)) {
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value32 = rtw_read32(Adapter, EFUSE_CTRL);
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retry++;
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}
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/* 20100205 Joseph: Add delay suggested by SD1 Victor. */
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/* This fix the problem that Efuse read error in high temperature condition. */
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/* Designer says that there shall be some delay after ready bit is set, or the */
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/* result will always stay on last data we read. */
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udelay(50);
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value32 = rtw_read32(Adapter, EFUSE_CTRL);
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*pbuf = (u8)(value32 & 0xff);
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}
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/*-----------------------------------------------------------------------------
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* Function: EFUSE_ShadowMapUpdate
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*
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* Overview: Transfer current EFUSE content to shadow init and modify map.
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*
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* Input: NONE
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*
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* Output: NONE
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*
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* Return: NONE
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*
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* Revised History:
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* When Who Remark
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* 11/13/2008 MHC Create Version 0.
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*
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*---------------------------------------------------------------------------*/
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void EFUSE_ShadowMapUpdate(struct adapter *pAdapter)
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{
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struct eeprom_priv *pEEPROM = &pAdapter->eeprompriv;
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if (pEEPROM->bautoload_fail_flag) {
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memset(pEEPROM->efuse_eeprom_data, 0xFF, EFUSE_MAP_LEN_88E);
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return;
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}
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rtl8188e_EfusePowerSwitch(pAdapter, true);
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rtl8188e_ReadEFuse(pAdapter, 0, EFUSE_MAP_LEN_88E, pEEPROM->efuse_eeprom_data);
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rtl8188e_EfusePowerSwitch(pAdapter, false);
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}
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