drivers/staging/r8188eu/core/rtw_efuse.c

// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2007 - 2011 Realtek Corporation. */

#define _RTW_EFUSE_C_

#include "../include/osdep_service.h"
#include "../include/drv_types.h"
#include "../include/rtw_efuse.h"

/*------------------------Define local variable------------------------------*/
u8 fakeEfuseBank;
u32 fakeEfuseUsedBytes;
u8 fakeEfuseContent[EFUSE_MAX_HW_SIZE] = {0};
u8 fakeEfuseInitMap[EFUSE_MAX_MAP_LEN] = {0};
u8 fakeEfuseModifiedMap[EFUSE_MAX_MAP_LEN] = {0};

u32 BTEfuseUsedBytes;
u8 BTEfuseContent[EFUSE_MAX_BT_BANK][EFUSE_MAX_HW_SIZE];
u8 BTEfuseInitMap[EFUSE_BT_MAX_MAP_LEN] = {0};
u8 BTEfuseModifiedMap[EFUSE_BT_MAX_MAP_LEN] = {0};

u32 fakeBTEfuseUsedBytes;
u8 fakeBTEfuseContent[EFUSE_MAX_BT_BANK][EFUSE_MAX_HW_SIZE];
u8 fakeBTEfuseInitMap[EFUSE_BT_MAX_MAP_LEN] = {0};
u8 fakeBTEfuseModifiedMap[EFUSE_BT_MAX_MAP_LEN] = {0};
/*------------------------Define local variable------------------------------*/

#define REG_EFUSE_CTRL		0x0030
#define EFUSE_CTRL			REG_EFUSE_CTRL		/*  E-Fuse Control. */

static bool Efuse_Read1ByteFromFakeContent(u16 Offset, u8 *Value)
{
	if (Offset >= EFUSE_MAX_HW_SIZE)
		return false;
	if (fakeEfuseBank == 0)
		*Value = fakeEfuseContent[Offset];
	else
		*Value = fakeBTEfuseContent[fakeEfuseBank - 1][Offset];
	return true;
}

static bool
Efuse_Write1ByteToFakeContent(
			struct adapter *pAdapter,
			u16 Offset,
			u8 Value)
{
	if (Offset >= EFUSE_MAX_HW_SIZE)
		return false;
	if (fakeEfuseBank == 0) {
		fakeEfuseContent[Offset] = Value;
	} else {
		fakeBTEfuseContent[fakeEfuseBank - 1][Offset] = Value;
	}
	return true;
}

/*  11/16/2008 MH Add description. Get current efuse area enabled word!!. */
u8
Efuse_CalculateWordCnts(u8 word_en)
{
	u8 word_cnts = 0;
	if (!(word_en & BIT(0)))
		word_cnts++; /*  0 : write enable */
	if (!(word_en & BIT(1)))
		word_cnts++;
	if (!(word_en & BIT(2)))
		word_cnts++;
	if (!(word_en & BIT(3)))
		word_cnts++;
	return word_cnts;
}

/*  */
/* 	Description: */
/* 		Execute E-Fuse read byte operation. */
/* 		Referred from SD1 Richard. */
/*  */
/* 	Assumption: */
/* 		1. Boot from E-Fuse and successfully auto-load. */
/* 		2. PASSIVE_LEVEL (USB interface) */
/*  */
/* 	Created by Roger, 2008.10.21. */
/*  */
void
ReadEFuseByte(
		struct adapter *Adapter,
		u16 _offset,
		u8 *pbuf,
		bool pseudo)
{
	u32 value32;
	u8 readbyte;
	u16 retry;

	if (pseudo) {
		Efuse_Read1ByteFromFakeContent(_offset, pbuf);
		return;
	}

	/* Write Address */
	rtw_write8(Adapter, EFUSE_CTRL + 1, (_offset & 0xff));
	readbyte = rtw_read8(Adapter, EFUSE_CTRL + 2);
	rtw_write8(Adapter, EFUSE_CTRL + 2, ((_offset >> 8) & 0x03) | (readbyte & 0xfc));

	/* Write bit 32 0 */
	readbyte = rtw_read8(Adapter, EFUSE_CTRL + 3);
	rtw_write8(Adapter, EFUSE_CTRL + 3, (readbyte & 0x7f));

	/* Check bit 32 read-ready */
	retry = 0;
	value32 = rtw_read32(Adapter, EFUSE_CTRL);
	while (!(((value32 >> 24) & 0xff) & 0x80)  && (retry < 10000)) {
		value32 = rtw_read32(Adapter, EFUSE_CTRL);
		retry++;
	}

	/*  20100205 Joseph: Add delay suggested by SD1 Victor. */
	/*  This fix the problem that Efuse read error in high temperature condition. */
	/*  Designer says that there shall be some delay after ready bit is set, or the */
	/*  result will always stay on last data we read. */
	udelay(50);
	value32 = rtw_read32(Adapter, EFUSE_CTRL);

	*pbuf = (u8)(value32 & 0xff);
}

/*  11/16/2008 MH Read one byte from real Efuse. */
u8 efuse_OneByteRead(struct adapter *pAdapter, u16 addr, u8 *data, bool pseudo)
{
	u8 tmpidx = 0;
	u8 result;

	if (pseudo) {
		result = Efuse_Read1ByteFromFakeContent(addr, data);
		return result;
	}
	/*  -----------------e-fuse reg ctrl --------------------------------- */
	/* address */
	rtw_write8(pAdapter, EFUSE_CTRL + 1, (u8)(addr & 0xff));
	rtw_write8(pAdapter, EFUSE_CTRL + 2, ((u8)((addr >> 8) & 0x03)) |
		   (rtw_read8(pAdapter, EFUSE_CTRL + 2) & 0xFC));

	rtw_write8(pAdapter, EFUSE_CTRL + 3,  0x72);/* read cmd */

	while (!(0x80 & rtw_read8(pAdapter, EFUSE_CTRL + 3)) && (tmpidx < 100))
		tmpidx++;
	if (tmpidx < 100) {
		*data = rtw_read8(pAdapter, EFUSE_CTRL);
		result = true;
	} else {
		*data = 0xff;
		result = false;
	}
	return result;
}

/*  11/16/2008 MH Write one byte to reald Efuse. */
u8 efuse_OneByteWrite(struct adapter *pAdapter, u16 addr, u8 data, bool pseudo)
{
	u8 tmpidx = 0;
	u8 result;

	if (pseudo) {
		result = Efuse_Write1ByteToFakeContent(pAdapter, addr, data);
		return result;
	}

	/*  -----------------e-fuse reg ctrl --------------------------------- */
	/* address */
	rtw_write8(pAdapter, EFUSE_CTRL + 1, (u8)(addr & 0xff));
	rtw_write8(pAdapter, EFUSE_CTRL + 2,
		   (rtw_read8(pAdapter, EFUSE_CTRL + 2) & 0xFC) |
		   (u8)((addr >> 8) & 0x03));
	rtw_write8(pAdapter, EFUSE_CTRL, data);/* data */

	rtw_write8(pAdapter, EFUSE_CTRL + 3, 0xF2);/* write cmd */

	while ((0x80 &  rtw_read8(pAdapter, EFUSE_CTRL + 3)) && (tmpidx < 100))
		tmpidx++;

	if (tmpidx < 100)
		result = true;
	else
		result = false;

	return result;
}

/*-----------------------------------------------------------------------------
 * Function:	efuse_WordEnableDataRead
 *
 * Overview:	Read allowed word in current efuse section data.
 *
 * Input:       NONE
 *
 * Output:      NONE
 *
 * Return:      NONE
 *
 * Revised History:
 * When			Who		Remark
 * 11/16/2008	MHC		Create Version 0.
 * 11/21/2008	MHC		Fix Write bug when we only enable late word.
 *
 *---------------------------------------------------------------------------*/
void efuse_WordEnableDataRead(u8 word_en, u8 *sourdata, u8 *targetdata)
{
	if (!(word_en & BIT(0))) {
		targetdata[0] = sourdata[0];
		targetdata[1] = sourdata[1];
	}
	if (!(word_en & BIT(1))) {
		targetdata[2] = sourdata[2];
		targetdata[3] = sourdata[3];
	}
	if (!(word_en & BIT(2))) {
		targetdata[4] = sourdata[4];
		targetdata[5] = sourdata[5];
	}
	if (!(word_en & BIT(3))) {
		targetdata[6] = sourdata[6];
		targetdata[7] = sourdata[7];
	}
}

/*-----------------------------------------------------------------------------
 * Function:	Efuse_ReadAllMap
 *
 * Overview:	Read All Efuse content
 *
 * Input:       NONE
 *
 * Output:      NONE
 *
 * Return:      NONE
 *
 * Revised History:
 * When			Who		Remark
 * 11/11/2008	MHC		Create Version 0.
 *
 *---------------------------------------------------------------------------*/
static void Efuse_ReadAllMap(struct adapter *pAdapter, u8 efuseType, u8 *Efuse, bool pseudo)
{
	u16 mapLen = 0;

	rtl8188e_EfusePowerSwitch(pAdapter, false, true);

	rtl8188e_EFUSE_GetEfuseDefinition(pAdapter, efuseType, TYPE_EFUSE_MAP_LEN, (void *)&mapLen, pseudo);

	rtl8188e_ReadEFuse(pAdapter, efuseType, 0, mapLen, Efuse, pseudo);

	rtl8188e_EfusePowerSwitch(pAdapter, false, false);
}

/*-----------------------------------------------------------------------------
 * Function:	EFUSE_ShadowMapUpdate
 *
 * Overview:	Transfer current EFUSE content to shadow init and modify map.
 *
 * Input:       NONE
 *
 * Output:      NONE
 *
 * Return:      NONE
 *
 * Revised History:
 * When			Who		Remark
 * 11/13/2008	MHC		Create Version 0.
 *
 *---------------------------------------------------------------------------*/
void EFUSE_ShadowMapUpdate(
	struct adapter *pAdapter,
	u8 efuseType,
	bool pseudo)
{
	struct eeprom_priv *pEEPROM = &pAdapter->eeprompriv;
	u16 mapLen = 0;

	rtl8188e_EFUSE_GetEfuseDefinition(pAdapter, efuseType, TYPE_EFUSE_MAP_LEN, (void *)&mapLen, pseudo);

	if (pEEPROM->bautoload_fail_flag)
		memset(pEEPROM->efuse_eeprom_data, 0xFF, mapLen);
	else
		Efuse_ReadAllMap(pAdapter, efuseType, pEEPROM->efuse_eeprom_data, pseudo);
} /*  EFUSE_ShadowMapUpdate */