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/******************************************************************************
* Copyright(c) 2008 - 2010 Realtek Corporation. All rights reserved.
*
* Based on the r8180 driver, which is:
* Copyright 2004-2005 Andrea Merello <andreamrl@tiscali.it>, et al.
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
*
* The full GNU General Public License is included in this distribution in the
* file called LICENSE.
*
* Contact Information:
* wlanfae <wlanfae@realtek.com>
******************************************************************************/
#include "rtl_core.h"
#include "rtl_eeprom.h"
static void eprom_cs(struct net_device *dev, short bit)
{
if (bit)
write_nic_byte(dev, EPROM_CMD,
(1 << EPROM_CS_SHIFT) |
read_nic_byte(dev, EPROM_CMD));
else
write_nic_byte(dev, EPROM_CMD, read_nic_byte(dev, EPROM_CMD)
& ~(1<<EPROM_CS_SHIFT));
udelay(EPROM_DELAY);
}
static void eprom_ck_cycle(struct net_device *dev)
{
write_nic_byte(dev, EPROM_CMD,
(1<<EPROM_CK_SHIFT) | read_nic_byte(dev, EPROM_CMD));
udelay(EPROM_DELAY);
write_nic_byte(dev, EPROM_CMD,
read_nic_byte(dev, EPROM_CMD) & ~(1<<EPROM_CK_SHIFT));
udelay(EPROM_DELAY);
}
static void eprom_w(struct net_device *dev, short bit)
{
if (bit)
write_nic_byte(dev, EPROM_CMD, (1<<EPROM_W_SHIFT) |
read_nic_byte(dev, EPROM_CMD));
else
write_nic_byte(dev, EPROM_CMD, read_nic_byte(dev, EPROM_CMD)
& ~(1<<EPROM_W_SHIFT));
udelay(EPROM_DELAY);
}
static short eprom_r(struct net_device *dev)
{
short bit;
bit = (read_nic_byte(dev, EPROM_CMD) & (1<<EPROM_R_SHIFT));
udelay(EPROM_DELAY);
if (bit)
return 1;
return 0;
}
static void eprom_send_bits_string(struct net_device *dev, short b[], int len)
{
int i;
for (i = 0; i < len; i++) {
eprom_w(dev, b[i]);
eprom_ck_cycle(dev);
}
}
u32 eprom_read(struct net_device *dev, u32 addr)
{
struct r8192_priv *priv = rtllib_priv(dev);
short read_cmd[] = {1, 1, 0};
short addr_str[8];
int i;
int addr_len;
u32 ret;
ret = 0;
write_nic_byte(dev, EPROM_CMD,
(EPROM_CMD_PROGRAM << EPROM_CMD_OPERATING_MODE_SHIFT));
udelay(EPROM_DELAY);
if (priv->epromtype == EEPROM_93C56) {
addr_str[7] = addr & 1;
addr_str[6] = addr & (1<<1);
addr_str[5] = addr & (1<<2);
addr_str[4] = addr & (1<<3);
addr_str[3] = addr & (1<<4);
addr_str[2] = addr & (1<<5);
addr_str[1] = addr & (1<<6);
addr_str[0] = addr & (1<<7);
addr_len = 8;
} else {
addr_str[5] = addr & 1;
addr_str[4] = addr & (1<<1);
addr_str[3] = addr & (1<<2);
addr_str[2] = addr & (1<<3);
addr_str[1] = addr & (1<<4);
addr_str[0] = addr & (1<<5);
addr_len = 6;
}
eprom_cs(dev, 1);
eprom_ck_cycle(dev);
eprom_send_bits_string(dev, read_cmd, 3);
eprom_send_bits_string(dev, addr_str, addr_len);
eprom_w(dev, 0);
for (i = 0; i < 16; i++) {
eprom_ck_cycle(dev);
ret |= (eprom_r(dev)<<(15-i));
}
eprom_cs(dev, 0);
eprom_ck_cycle(dev);
write_nic_byte(dev, EPROM_CMD,
(EPROM_CMD_NORMAL<<EPROM_CMD_OPERATING_MODE_SHIFT));
return ret;
}
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