208 lines
5.2 KiB
C
208 lines
5.2 KiB
C
/* Ethernet Physical Receiver model.
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Copyright (C) 2010-2012 Free Software Foundation, Inc.
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Contributed by Analog Devices, Inc.
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This file is part of simulators.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "config.h"
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#include "sim-main.h"
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#include "devices.h"
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#if defined (HAVE_LINUX_MII_H) && defined (HAVE_LINUX_TYPES_H)
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/* Workaround old/broken linux headers. */
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#include <linux/types.h>
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#include <linux/mii.h>
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#define REG_PHY_SIZE 0x20
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struct eth_phy
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{
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bu32 base;
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bu16 regs[REG_PHY_SIZE];
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};
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#define reg_base() offsetof(struct eth_phy, regs[0])
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#define reg_offset(reg) (offsetof(struct eth_phy, reg) - reg_base())
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#define reg_idx(reg) (reg_offset (reg) / 4)
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static const char * const reg_names[] =
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{
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[MII_BMCR ] = "MII_BMCR",
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[MII_BMSR ] = "MII_BMSR",
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[MII_PHYSID1 ] = "MII_PHYSID1",
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[MII_PHYSID2 ] = "MII_PHYSID2",
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[MII_ADVERTISE ] = "MII_ADVERTISE",
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[MII_LPA ] = "MII_LPA",
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[MII_EXPANSION ] = "MII_EXPANSION",
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#ifdef MII_CTRL1000
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[MII_CTRL1000 ] = "MII_CTRL1000",
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#endif
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#ifdef MII_STAT1000
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[MII_STAT1000 ] = "MII_STAT1000",
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#endif
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#ifdef MII_ESTATUS
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[MII_ESTATUS ] = "MII_ESTATUS",
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#endif
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[MII_DCOUNTER ] = "MII_DCOUNTER",
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[MII_FCSCOUNTER ] = "MII_FCSCOUNTER",
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[MII_NWAYTEST ] = "MII_NWAYTEST",
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[MII_RERRCOUNTER] = "MII_RERRCOUNTER",
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[MII_SREVISION ] = "MII_SREVISION",
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[MII_RESV1 ] = "MII_RESV1",
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[MII_LBRERROR ] = "MII_LBRERROR",
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[MII_PHYADDR ] = "MII_PHYADDR",
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[MII_RESV2 ] = "MII_RESV2",
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[MII_TPISTATUS ] = "MII_TPISTATUS",
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[MII_NCONFIG ] = "MII_NCONFIG",
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};
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#define mmr_name(off) (reg_names[off] ? : "<INV>")
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#define mmr_off reg_off
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static unsigned
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eth_phy_io_write_buffer (struct hw *me, const void *source,
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int space, address_word addr, unsigned nr_bytes)
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{
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struct eth_phy *phy = hw_data (me);
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bu16 reg_off;
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bu16 value;
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bu16 *valuep;
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value = dv_load_2 (source);
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reg_off = addr - phy->base;
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valuep = (void *)((unsigned long)phy + reg_base() + reg_off);
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HW_TRACE_WRITE ();
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switch (reg_off)
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{
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case MII_BMCR:
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*valuep = value;
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break;
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case MII_PHYSID1:
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case MII_PHYSID2:
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/* Discard writes to these. */
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break;
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default:
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/* XXX: Discard writes to unknown regs ? */
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*valuep = value;
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break;
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}
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return nr_bytes;
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}
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static unsigned
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eth_phy_io_read_buffer (struct hw *me, void *dest,
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int space, address_word addr, unsigned nr_bytes)
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{
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struct eth_phy *phy = hw_data (me);
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bu16 reg_off;
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bu16 *valuep;
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reg_off = addr - phy->base;
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valuep = (void *)((unsigned long)phy + reg_base() + reg_off);
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HW_TRACE_READ ();
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switch (reg_off)
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{
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case MII_BMCR:
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dv_store_2 (dest, *valuep);
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break;
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case MII_BMSR:
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/* XXX: Let people control this ? */
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*valuep = BMSR_100FULL | BMSR_100HALF | BMSR_10FULL | BMSR_10HALF |
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BMSR_ANEGCOMPLETE | BMSR_ANEGCAPABLE | BMSR_LSTATUS;
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dv_store_2 (dest, *valuep);
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break;
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case MII_LPA:
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/* XXX: Let people control this ? */
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*valuep = LPA_100FULL | LPA_100HALF | LPA_10FULL | LPA_10HALF;
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dv_store_2 (dest, *valuep);
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break;
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default:
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dv_store_2 (dest, *valuep);
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break;
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}
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return nr_bytes;
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}
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static void
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attach_eth_phy_regs (struct hw *me, struct eth_phy *phy)
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{
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address_word attach_address;
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int attach_space;
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unsigned attach_size;
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reg_property_spec reg;
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if (hw_find_property (me, "reg") == NULL)
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hw_abort (me, "Missing \"reg\" property");
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if (!hw_find_reg_array_property (me, "reg", 0, ®))
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hw_abort (me, "\"reg\" property must contain three addr/size entries");
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hw_unit_address_to_attach_address (hw_parent (me),
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®.address,
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&attach_space, &attach_address, me);
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hw_unit_size_to_attach_size (hw_parent (me), ®.size, &attach_size, me);
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if (attach_size != REG_PHY_SIZE)
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hw_abort (me, "\"reg\" size must be %#x", REG_PHY_SIZE);
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hw_attach_address (hw_parent (me),
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0, attach_space, attach_address, attach_size, me);
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phy->base = attach_address;
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}
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static void
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eth_phy_finish (struct hw *me)
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{
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struct eth_phy *phy;
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phy = HW_ZALLOC (me, struct eth_phy);
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set_hw_data (me, phy);
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set_hw_io_read_buffer (me, eth_phy_io_read_buffer);
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set_hw_io_write_buffer (me, eth_phy_io_write_buffer);
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attach_eth_phy_regs (me, phy);
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/* Initialize the PHY. */
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phy->regs[MII_PHYSID1] = 0; /* Unassigned Vendor */
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phy->regs[MII_PHYSID2] = 0xAD; /* Product */
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}
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#else
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static void
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eth_phy_finish (struct hw *me)
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{
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HW_TRACE ((me, "No linux/mii.h support found"));
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}
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#endif
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const struct hw_descriptor dv_eth_phy_descriptor[] =
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{
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{"eth_phy", eth_phy_finish,},
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{NULL, NULL},
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};
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