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// SPDX-License-Identifier: GPL-2.0
/******************************************************************************
*
* Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved.
*
******************************************************************************/
#define _RTW_EEPROM_C_
#include <drv_conf.h>
#include <osdep_service.h>
#include <drv_types.h>
void up_clk(_adapter *padapter, u16 *x)
{
_func_enter_;
*x = *x | _EESK;
rtw_write8(padapter, EE_9346CR, (u8)*x);
udelay(CLOCK_RATE);
_func_exit_;
}
void down_clk(_adapter *padapter, u16 *x)
{
_func_enter_;
*x = *x & ~_EESK;
rtw_write8(padapter, EE_9346CR, (u8)*x);
udelay(CLOCK_RATE);
_func_exit_;
}
void shift_out_bits(_adapter *padapter, u16 data, u16 count)
{
u16 x, mask;
_func_enter_;
if (padapter->bSurpriseRemoved == true) {
RT_TRACE(_module_rtl871x_eeprom_c_, _drv_err_, ("padapter->bSurpriseRemoved==true"));
goto out;
}
mask = 0x01 << (count - 1);
x = rtw_read8(padapter, EE_9346CR);
x &= ~(_EEDO | _EEDI);
do {
x &= ~_EEDI;
if (data & mask)
x |= _EEDI;
if (padapter->bSurpriseRemoved == true) {
RT_TRACE(_module_rtl871x_eeprom_c_, _drv_err_, ("padapter->bSurpriseRemoved==true"));
goto out;
}
rtw_write8(padapter, EE_9346CR, (u8)x);
udelay(CLOCK_RATE);
up_clk(padapter, &x);
down_clk(padapter, &x);
mask = mask >> 1;
} while (mask);
if (padapter->bSurpriseRemoved == true) {
RT_TRACE(_module_rtl871x_eeprom_c_, _drv_err_, ("padapter->bSurpriseRemoved==true"));
goto out;
}
x &= ~_EEDI;
rtw_write8(padapter, EE_9346CR, (u8)x);
out:
_func_exit_;
}
u16 shift_in_bits(_adapter *padapter)
{
u16 x, d = 0, i;
_func_enter_;
if (padapter->bSurpriseRemoved == true) {
RT_TRACE(_module_rtl871x_eeprom_c_, _drv_err_, ("padapter->bSurpriseRemoved==true"));
goto out;
}
x = rtw_read8(padapter, EE_9346CR);
x &= ~(_EEDO | _EEDI);
d = 0;
for (i = 0; i < 16; i++) {
d = d << 1;
up_clk(padapter, &x);
if (padapter->bSurpriseRemoved == true) {
RT_TRACE(_module_rtl871x_eeprom_c_, _drv_err_, ("padapter->bSurpriseRemoved==true"));
goto out;
}
x = rtw_read8(padapter, EE_9346CR);
x &= ~(_EEDI);
if (x & _EEDO)
d |= 1;
down_clk(padapter, &x);
}
out:
_func_exit_;
return d;
}
void standby(_adapter *padapter)
{
u8 x;
_func_enter_;
x = rtw_read8(padapter, EE_9346CR);
x &= ~(_EECS | _EESK);
rtw_write8(padapter, EE_9346CR, x);
udelay(CLOCK_RATE);
x |= _EECS;
rtw_write8(padapter, EE_9346CR, x);
udelay(CLOCK_RATE);
_func_exit_;
}
void eeprom_clean(_adapter *padapter)
{
u16 x;
_func_enter_;
if (padapter->bSurpriseRemoved == true) {
RT_TRACE(_module_rtl871x_eeprom_c_, _drv_err_, ("padapter->bSurpriseRemoved==true"));
goto out;
}
x = rtw_read8(padapter, EE_9346CR);
if (padapter->bSurpriseRemoved == true) {
RT_TRACE(_module_rtl871x_eeprom_c_, _drv_err_, ("padapter->bSurpriseRemoved==true"));
goto out;
}
x &= ~(_EECS | _EEDI);
rtw_write8(padapter, EE_9346CR, (u8)x);
if (padapter->bSurpriseRemoved == true) {
RT_TRACE(_module_rtl871x_eeprom_c_, _drv_err_, ("padapter->bSurpriseRemoved==true"));
goto out;
}
up_clk(padapter, &x);
if (padapter->bSurpriseRemoved == true) {
RT_TRACE(_module_rtl871x_eeprom_c_, _drv_err_, ("padapter->bSurpriseRemoved==true"));
goto out;
}
down_clk(padapter, &x);
out:
_func_exit_;
}
u16 eeprom_read16(_adapter *padapter, u16 reg) /*ReadEEprom*/
{
u16 x;
u16 data = 0;
_func_enter_;
if (padapter->bSurpriseRemoved == true) {
RT_TRACE(_module_rtl871x_eeprom_c_, _drv_err_, ("padapter->bSurpriseRemoved==true"));
goto out;
}
/* select EEPROM, reset bits, set _EECS*/
x = rtw_read8(padapter, EE_9346CR);
if (padapter->bSurpriseRemoved == true) {
RT_TRACE(_module_rtl871x_eeprom_c_, _drv_err_, ("padapter->bSurpriseRemoved==true"));
goto out;
}
x &= ~(_EEDI | _EEDO | _EESK | _EEM0);
x |= _EEM1 | _EECS;
rtw_write8(padapter, EE_9346CR, (unsigned char)x);
/* write the read opcode and register number in that order*/
/* The opcode is 3bits in length, reg is 6 bits long*/
shift_out_bits(padapter, EEPROM_READ_OPCODE, 3);
shift_out_bits(padapter, reg, padapter->EepromAddressSize);
/* Now read the data (16 bits) in from the selected EEPROM word*/
data = shift_in_bits(padapter);
eeprom_clean(padapter);
out:
_func_exit_;
return data;
}
/*addr_off : address offset of the entry in eeprom (not the tuple number of eeprom (reg); that is addr_off !=reg)*/
u8 eeprom_read(_adapter *padapter, u32 addr_off, u8 sz, u8 *rbuf)
{
u8 quotient, remainder, addr_2align_odd;
u16 reg, stmp, i = 0, idx = 0;
_func_enter_;
reg = (u16)(addr_off >> 1);
addr_2align_odd = (u8)(addr_off & 0x1);
/*read that start at high part: e.g 1,3,5,7,9,...*/
if (addr_2align_odd) {
stmp = eeprom_read16(padapter, reg);
rbuf[idx++] = (u8) ((stmp>>8)&0xff); /*return hogh-part of the short*/
reg++; sz--;
}
quotient = sz >> 1;
remainder = sz & 0x1;
for (i = 0; i < quotient; i++) {
stmp = eeprom_read16(padapter, reg+i);
rbuf[idx++] = (u8) (stmp&0xff);
rbuf[idx++] = (u8) ((stmp>>8)&0xff);
}
reg = reg+i;
if (remainder) { /*end of read at lower part of short : 0,2,4,6,...*/
stmp = eeprom_read16(padapter, reg);
rbuf[idx] = (u8)(stmp & 0xff);
}
_func_exit_;
return true;
}
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