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/*
################################################################################
#
# r8101 is the Linux device driver released for RealTek RTL8101E, RTL8102E,
# and RTL8103E Fast Ethernet controllers with PCI-Express interface.
#
# Copyright(c) 2009 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:
* US5,307,459, US5,434,872, US5,732,094, 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"
//-------------------------------------------------------------------
//rtl_eeprom_type():
// tell the eeprom type
//return value:
// 0: the eeprom type is 93C46
// 1: the eeprom type is 93C56 or 93C66
//-------------------------------------------------------------------
int rtl_eeprom_type(void __iomem *ioaddr)
{
return RTL_R32(RxConfig) & RxCfg_9356SEL;
}
void rtl_eeprom_cleanup(void __iomem *ioaddr)
{
u8 x;
x = RTL_R8(Cfg9346);
x &= ~(Cfg9346_EEDI | Cfg9346_EECS);
RTL_W8(Cfg9346, x);
rtl_raise_clock(&x, ioaddr);
rtl_lower_clock(&x, ioaddr);
}
int rtl_eeprom_cmd_done(void __iomem *ioaddr)
{
u8 x;
int i;
rtl_stand_by(ioaddr);
for (i = 0; i < 50000; i++) {
x = RTL_R8(Cfg9346);
if (x & Cfg9346_EEDO) {
udelay(RTL_CLOCK_RATE * 2 * 3);
return 0;
}
udelay(1);
}
return -1;
}
//-------------------------------------------------------------------
//rtl_eeprom_read_sc():
// read one word from eeprom
//-------------------------------------------------------------------
u16 rtl_eeprom_read_sc(void __iomem *ioaddr, u16 reg)
{
int addr_sz = 6;
u8 x;
u16 data;
if (rtl_eeprom_type(ioaddr))
addr_sz = 8;
else
addr_sz = 6;
x = RTL_R8(Cfg9346);
x &= ~(Cfg9346_EEDI | Cfg9346_EEDO | Cfg9346_EESK);
x |= Cfg9346_EEM1 | Cfg9346_EECS;
RTL_W8(Cfg9346, x);
rtl_shift_out_bits(RTL_EEPROM_READ_OPCODE, 3, ioaddr);
rtl_shift_out_bits(reg, addr_sz, ioaddr);
data = rtl_shift_in_bits(ioaddr);
rtl_eeprom_cleanup(ioaddr);
return data;
}
//-------------------------------------------------------------------
//rtl_eeprom_write_sc():
// write one word to a specific address in the eeprom
//-------------------------------------------------------------------
void rtl_eeprom_write_sc(void __iomem *ioaddr, u16 reg, u16 data)
{
u8 x;
int addr_sz = 6;
int w_dummy_addr = 4;
if (rtl_eeprom_type(ioaddr)) {
addr_sz = 8;
w_dummy_addr = 6;
} else {
addr_sz = 6;
w_dummy_addr = 4;
}
x = RTL_R8(Cfg9346);
x &= ~(Cfg9346_EEDI | Cfg9346_EEDO | Cfg9346_EESK);
x |= Cfg9346_EEM1 | Cfg9346_EECS;
RTL_W8(Cfg9346, x);
rtl_shift_out_bits(RTL_EEPROM_EWEN_OPCODE, 5, ioaddr);
rtl_shift_out_bits(reg, w_dummy_addr, ioaddr);
rtl_stand_by(ioaddr);
rtl_shift_out_bits(RTL_EEPROM_ERASE_OPCODE, 3, ioaddr);
rtl_shift_out_bits(reg, addr_sz, ioaddr);
if (rtl_eeprom_cmd_done(ioaddr) < 0) {
return;
}
rtl_stand_by(ioaddr);
rtl_shift_out_bits(RTL_EEPROM_WRITE_OPCODE, 3, ioaddr);
rtl_shift_out_bits(reg, addr_sz, ioaddr);
rtl_shift_out_bits(data, 16, ioaddr);
if (rtl_eeprom_cmd_done(ioaddr) < 0) {
return;
}
rtl_stand_by(ioaddr);
rtl_shift_out_bits(RTL_EEPROM_EWDS_OPCODE, 5, ioaddr);
rtl_shift_out_bits(reg, w_dummy_addr, ioaddr);
rtl_eeprom_cleanup(ioaddr);
}
void rtl_raise_clock(u8 *x, void __iomem *ioaddr)
{
*x = *x | Cfg9346_EESK;
RTL_W8(Cfg9346, *x);
udelay(RTL_CLOCK_RATE);
}
void rtl_lower_clock(u8 *x, void __iomem *ioaddr)
{
*x = *x & ~Cfg9346_EESK;
RTL_W8(Cfg9346, *x);
udelay(RTL_CLOCK_RATE);
}
void rtl_shift_out_bits(int data, int count, void __iomem *ioaddr)
{
u8 x;
int mask;
mask = 0x01 << (count - 1);
x = RTL_R8(Cfg9346);
x &= ~(Cfg9346_EEDI | Cfg9346_EEDO);
do {
x &= ~Cfg9346_EEDI;
if (data & mask)
x |= Cfg9346_EEDI;
RTL_W8(Cfg9346, x);
udelay(RTL_CLOCK_RATE);
rtl_raise_clock(&x, ioaddr);
rtl_lower_clock(&x, ioaddr);
mask = mask >> 1;
} while(mask);
x &= ~Cfg9346_EEDI;
RTL_W8(Cfg9346, x);
}
u16 rtl_shift_in_bits(void __iomem *ioaddr)
{
u8 x;
u16 d, i;
x = RTL_R8(Cfg9346);
x &= ~(Cfg9346_EEDI | Cfg9346_EEDO);
d = 0;
for (i = 0; i < 16; i++) {
d = d << 1;
rtl_raise_clock(&x, ioaddr);
x = RTL_R8(Cfg9346);
x &= ~Cfg9346_EEDI;
if (x & Cfg9346_EEDO)
d |= 1;
rtl_lower_clock(&x, ioaddr);
}
return d;
}
void rtl_stand_by(void __iomem *ioaddr)
{
u8 x;
x = RTL_R8(Cfg9346);
x &= ~(Cfg9346_EECS | Cfg9346_EESK);
RTL_W8(Cfg9346, x);
udelay(RTL_CLOCK_RATE);
x |= Cfg9346_EECS;
RTL_W8(Cfg9346, x);
}
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