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/* -*- c++ -*- */
/*
* Copyright 2007 Free Software Foundation, Inc.
*
* 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 3 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/>.
*/
#include "eth_mac.h"
#include "memory_map.h"
#include <stdbool.h>
#include "eth_phy.h" // for simulation constants
#include "mdelay.h"
#include "stdio.h"
#define PHY_ADDR 1
void
eth_mac_set_addr(const eth_mac_addr_t *src)
{
eth_mac->ucast_hi =
(((unsigned int)src->addr[0])<<8) +
((unsigned int)src->addr[1]);
eth_mac->ucast_lo =
(((unsigned int)src->addr[2])<<24) +
(((unsigned int)src->addr[3])<<16) +
(((unsigned int)src->addr[4])<<8) +
(((unsigned int)src->addr[5]));
}
void
eth_mac_init(const eth_mac_addr_t *src)
{
eth_mac->miimoder = 25; // divider from CPU clock (50MHz/25 = 2MHz)
eth_mac_set_addr(src);
eth_mac->settings = MAC_SET_PAUSE_EN | MAC_SET_PASS_BCAST | MAC_SET_PASS_UCAST | MAC_SET_PAUSE_SEND_EN;
eth_mac->pause_time = 38;
eth_mac->pause_thresh = 1200;
// set rx flow control high and low water marks
// unsigned int lwmark = (2*2048 + 64)/4; // 2 * 2048-byte frames + 1 * 64-byte pause frame
// eth_mac->fc_hwmark = lwmark + 2048/4; // plus a 2048-byte frame
// eth_mac->fc_lwmark = 600; // there are currently 2047 lines in the fifo
// eth_mac->fc_hwmark = 1200;
//eth_mac->fc_padtime = 1700; // how long before flow control runs out do we
// request a re-pause. Units of 8ns (bytes)
//eth_mac->tx_pause_en = 0; // pay attn to pause frames sent to us
//eth_mac->pause_quanta_set = 38; // a bit more than 1 max frame 16kb/512 + fudge
//eth_mac->pause_frame_send_en = 0; // enable sending pause frames
}
int
eth_mac_read_rmon(int addr)
{
int t = 0;
/*
eth_mac->rmon_rd_addr = addr;
eth_mac->rmon_rd_apply = 1;
while(eth_mac->rmon_rd_grant == 0)
;
t = eth_mac->rmon_rd_dout;
eth_mac->rmon_rd_apply = 0;
*/
return t;
}
int
eth_mac_miim_read(int addr)
{
int phy_addr = PHY_ADDR;
eth_mac->miiaddress = ((addr & 0x1f) << 8) | phy_addr;
eth_mac->miicommand = MIIC_RSTAT;
while((eth_mac->miistatus & MIIS_BUSY) != 0)
;
int r = eth_mac->miirx_data;
//printf("MIIM-READ ADDR 0x%x DATA 0x%x\n",addr, r);
return r;
}
void
eth_mac_miim_write(int addr, int value)
{
int phy_addr = PHY_ADDR;
eth_mac->miiaddress = ((addr & 0x1f) << 8) | phy_addr;
eth_mac->miitx_data = value;
eth_mac->miicommand = MIIC_WCTRLDATA;
// printf("MIIM-WRITE ADDR 0x%x VAL 0x%x\n",addr,value);
while((eth_mac->miistatus & MIIS_BUSY) != 0)
;
}
int
eth_mac_miim_read_status(void)
{
if (hwconfig_simulation_p())
return 0;
return eth_mac->miistatus;
}
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