| Current Path : /var/lib/dkms/r8168/8.048.00/source/ |
Linux ift1.ift-informatik.de 5.4.0-216-generic #236-Ubuntu SMP Fri Apr 11 19:53:21 UTC 2025 x86_64 |
| Current File : /var/lib/dkms/r8168/8.048.00/source/rtl_eeprom.c |
/*
################################################################################
#
# r8168 is the Linux device driver released for Realtek Gigabit Ethernet
# controllers with PCI-Express interface.
#
# Copyright(c) 2019 Realtek Semiconductor Corp. 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, see <http://www.gnu.org/licenses/>.
#
# Author:
# Realtek NIC software team <nicfae@realtek.com>
# No. 2, Innovation Road II, Hsinchu Science Park, Hsinchu 300, Taiwan
#
################################################################################
*/
/************************************************************************************
* This product is covered by one or more of the following patents:
* US6,570,884, US6,115,776, and US6,327,625.
***********************************************************************************/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/ethtool.h>
#include <linux/netdevice.h>
#include <linux/delay.h>
#include <asm/io.h>
#include "r8168.h"
#include "rtl_eeprom.h"
//-------------------------------------------------------------------
//rtl8168_eeprom_type():
// tell the eeprom type
//return value:
// 0: the eeprom type is 93C46
// 1: the eeprom type is 93C56 or 93C66
//-------------------------------------------------------------------
void rtl8168_eeprom_type(struct rtl8168_private *tp)
{
u16 magic = 0;
if (tp->mcfg == CFG_METHOD_DEFAULT)
goto out_no_eeprom;
if(RTL_R8(tp, 0xD2)&0x04) {
//not support
//tp->eeprom_type = EEPROM_TWSI;
//tp->eeprom_len = 256;
goto out_no_eeprom;
} else if(RTL_R32(tp, RxConfig) & RxCfg_9356SEL) {
tp->eeprom_type = EEPROM_TYPE_93C56;
tp->eeprom_len = 256;
} else {
tp->eeprom_type = EEPROM_TYPE_93C46;
tp->eeprom_len = 128;
}
magic = rtl8168_eeprom_read_sc(tp, 0);
out_no_eeprom:
if ((magic != 0x8129) && (magic != 0x8128)) {
tp->eeprom_type = EEPROM_TYPE_NONE;
tp->eeprom_len = 0;
}
}
void rtl8168_eeprom_cleanup(struct rtl8168_private *tp)
{
u8 x;
x = RTL_R8(tp, Cfg9346);
x &= ~(Cfg9346_EEDI | Cfg9346_EECS);
RTL_W8(tp, Cfg9346, x);
rtl8168_raise_clock(tp, &x);
rtl8168_lower_clock(tp, &x);
}
int rtl8168_eeprom_cmd_done(struct rtl8168_private *tp)
{
u8 x;
int i;
rtl8168_stand_by(tp);
for (i = 0; i < 50000; i++) {
x = RTL_R8(tp, Cfg9346);
if (x & Cfg9346_EEDO) {
udelay(RTL_CLOCK_RATE * 2 * 3);
return 0;
}
udelay(1);
}
return -1;
}
//-------------------------------------------------------------------
//rtl8168_eeprom_read_sc():
// read one word from eeprom
//-------------------------------------------------------------------
u16 rtl8168_eeprom_read_sc(struct rtl8168_private *tp, u16 reg)
{
int addr_sz = 6;
u8 x;
u16 data;
if(tp->eeprom_type == EEPROM_TYPE_NONE) {
return -1;
}
if (tp->eeprom_type==EEPROM_TYPE_93C46)
addr_sz = 6;
else if (tp->eeprom_type==EEPROM_TYPE_93C56)
addr_sz = 8;
x = Cfg9346_EEM1 | Cfg9346_EECS;
RTL_W8(tp, Cfg9346, x);
rtl8168_shift_out_bits(tp, RTL_EEPROM_READ_OPCODE, 3);
rtl8168_shift_out_bits(tp, reg, addr_sz);
data = rtl8168_shift_in_bits(tp);
rtl8168_eeprom_cleanup(tp);
RTL_W8(tp, Cfg9346, 0);
return data;
}
//-------------------------------------------------------------------
//rtl8168_eeprom_write_sc():
// write one word to a specific address in the eeprom
//-------------------------------------------------------------------
void rtl8168_eeprom_write_sc(struct rtl8168_private *tp, u16 reg, u16 data)
{
u8 x;
int addr_sz = 6;
int w_dummy_addr = 4;
if(tp->eeprom_type == EEPROM_TYPE_NONE) {
return ;
}
if (tp->eeprom_type==EEPROM_TYPE_93C46) {
addr_sz = 6;
w_dummy_addr = 4;
} else if (tp->eeprom_type==EEPROM_TYPE_93C56) {
addr_sz = 8;
w_dummy_addr = 6;
}
x = Cfg9346_EEM1 | Cfg9346_EECS;
RTL_W8(tp, Cfg9346, x);
rtl8168_shift_out_bits(tp, RTL_EEPROM_EWEN_OPCODE, 5);
rtl8168_shift_out_bits(tp, reg, w_dummy_addr);
rtl8168_stand_by(tp);
rtl8168_shift_out_bits(tp, RTL_EEPROM_ERASE_OPCODE, 3);
rtl8168_shift_out_bits(tp, reg, addr_sz);
if (rtl8168_eeprom_cmd_done(tp) < 0) {
return;
}
rtl8168_stand_by(tp);
rtl8168_shift_out_bits(tp, RTL_EEPROM_WRITE_OPCODE, 3);
rtl8168_shift_out_bits(tp, reg, addr_sz);
rtl8168_shift_out_bits(tp, data, 16);
if (rtl8168_eeprom_cmd_done(tp) < 0) {
return;
}
rtl8168_stand_by(tp);
rtl8168_shift_out_bits(tp, RTL_EEPROM_EWDS_OPCODE, 5);
rtl8168_shift_out_bits(tp, reg, w_dummy_addr);
rtl8168_eeprom_cleanup(tp);
RTL_W8(tp, Cfg9346, 0);
}
void rtl8168_raise_clock(struct rtl8168_private *tp, u8 *x)
{
*x = *x | Cfg9346_EESK;
RTL_W8(tp, Cfg9346, *x);
udelay(RTL_CLOCK_RATE);
}
void rtl8168_lower_clock(struct rtl8168_private *tp, u8 *x)
{
*x = *x & ~Cfg9346_EESK;
RTL_W8(tp, Cfg9346, *x);
udelay(RTL_CLOCK_RATE);
}
void rtl8168_shift_out_bits(struct rtl8168_private *tp, int data, int count)
{
u8 x;
int mask;
mask = 0x01 << (count - 1);
x = RTL_R8(tp, Cfg9346);
x &= ~(Cfg9346_EEDI | Cfg9346_EEDO);
do {
if (data & mask)
x |= Cfg9346_EEDI;
else
x &= ~Cfg9346_EEDI;
RTL_W8(tp, Cfg9346, x);
udelay(RTL_CLOCK_RATE);
rtl8168_raise_clock(tp, &x);
rtl8168_lower_clock(tp, &x);
mask = mask >> 1;
} while(mask);
x &= ~Cfg9346_EEDI;
RTL_W8(tp, Cfg9346, x);
}
u16 rtl8168_shift_in_bits(struct rtl8168_private *tp)
{
u8 x;
u16 d, i;
x = RTL_R8(tp, Cfg9346);
x &= ~(Cfg9346_EEDI | Cfg9346_EEDO);
d = 0;
for (i = 0; i < 16; i++) {
d = d << 1;
rtl8168_raise_clock(tp, &x);
x = RTL_R8(tp, Cfg9346);
x &= ~Cfg9346_EEDI;
if (x & Cfg9346_EEDO)
d |= 1;
rtl8168_lower_clock(tp, &x);
}
return d;
}
void rtl8168_stand_by(struct rtl8168_private *tp)
{
u8 x;
x = RTL_R8(tp, Cfg9346);
x &= ~(Cfg9346_EECS | Cfg9346_EESK);
RTL_W8(tp, Cfg9346, x);
udelay(RTL_CLOCK_RATE);
x |= Cfg9346_EECS;
RTL_W8(tp, Cfg9346, x);
}
void rtl8168_set_eeprom_sel_low(struct rtl8168_private *tp)
{
RTL_W8(tp, Cfg9346, Cfg9346_EEM1);
RTL_W8(tp, Cfg9346, Cfg9346_EEM1 | Cfg9346_EESK);
udelay(20);
RTL_W8(tp, Cfg9346, Cfg9346_EEM1);
}