diff options
Diffstat (limited to 'sim/bfin/dv-eth_phy.c')
| -rw-r--r-- | sim/bfin/dv-eth_phy.c | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/sim/bfin/dv-eth_phy.c b/sim/bfin/dv-eth_phy.c new file mode 100644 index 0000000..59eaece --- /dev/null +++ b/sim/bfin/dv-eth_phy.c @@ -0,0 +1,206 @@ +/* Ethernet Physical Receiver model. + + Copyright (C) 2010-2011 Free Software Foundation, Inc. + Contributed by Analog Devices, Inc. + + This file is part of simulators. + + 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 "config.h" + +#include "sim-main.h" +#include "devices.h" + +#ifdef HAVE_LINUX_MII_H + +/* Workaround old/broken linux headers. */ +#define _LINUX_TYPES_H +#define __u16 unsigned short +#include <linux/mii.h> + +#define REG_PHY_SIZE 0x20 + +struct eth_phy +{ + bu32 base; + bu16 regs[REG_PHY_SIZE]; +}; +#define reg_base() offsetof(struct eth_phy, regs[0]) +#define reg_offset(reg) (offsetof(struct eth_phy, reg) - reg_base()) +#define reg_idx(reg) (reg_offset (reg) / 4) + +static const char * const reg_names[] = { + [MII_BMCR ] = "MII_BMCR", + [MII_BMSR ] = "MII_BMSR", + [MII_PHYSID1 ] = "MII_PHYSID1", + [MII_PHYSID2 ] = "MII_PHYSID2", + [MII_ADVERTISE ] = "MII_ADVERTISE", + [MII_LPA ] = "MII_LPA", + [MII_EXPANSION ] = "MII_EXPANSION", +#ifdef MII_CTRL1000 + [MII_CTRL1000 ] = "MII_CTRL1000", +#endif +#ifdef MII_STAT1000 + [MII_STAT1000 ] = "MII_STAT1000", +#endif +#ifdef MII_ESTATUS + [MII_ESTATUS ] = "MII_ESTATUS", +#endif + [MII_DCOUNTER ] = "MII_DCOUNTER", + [MII_FCSCOUNTER ] = "MII_FCSCOUNTER", + [MII_NWAYTEST ] = "MII_NWAYTEST", + [MII_RERRCOUNTER] = "MII_RERRCOUNTER", + [MII_SREVISION ] = "MII_SREVISION", + [MII_RESV1 ] = "MII_RESV1", + [MII_LBRERROR ] = "MII_LBRERROR", + [MII_PHYADDR ] = "MII_PHYADDR", + [MII_RESV2 ] = "MII_RESV2", + [MII_TPISTATUS ] = "MII_TPISTATUS", + [MII_NCONFIG ] = "MII_NCONFIG", +}; +#define mmr_name(off) (reg_names[off] ? : "<INV>") +#define mmr_off reg_off + +static unsigned +eth_phy_io_write_buffer (struct hw *me, const void *source, + int space, address_word addr, unsigned nr_bytes) +{ + struct eth_phy *phy = hw_data (me); + bu16 reg_off; + bu16 value; + bu16 *valuep; + + value = dv_load_2 (source); + + reg_off = addr - phy->base; + valuep = (void *)((unsigned long)phy + reg_base() + reg_off); + + HW_TRACE_WRITE (); + + switch (reg_off) + { + case MII_BMCR: + *valuep = value; + break; + case MII_PHYSID1: + case MII_PHYSID2: + /* Discard writes to these. */ + break; + default: + /* XXX: Discard writes to unknown regs ? */ + *valuep = value; + break; + } + + return nr_bytes; +} + +static unsigned +eth_phy_io_read_buffer (struct hw *me, void *dest, + int space, address_word addr, unsigned nr_bytes) +{ + struct eth_phy *phy = hw_data (me); + bu16 reg_off; + bu16 *valuep; + + reg_off = addr - phy->base; + valuep = (void *)((unsigned long)phy + reg_base() + reg_off); + + HW_TRACE_READ (); + + switch (reg_off) + { + case MII_BMCR: + dv_store_2 (dest, *valuep); + break; + case MII_BMSR: + /* XXX: Let people control this ? */ + *valuep = BMSR_100FULL | BMSR_100HALF | BMSR_10FULL | BMSR_10HALF | + BMSR_ANEGCOMPLETE | BMSR_ANEGCAPABLE | BMSR_LSTATUS; + dv_store_2 (dest, *valuep); + break; + case MII_LPA: + /* XXX: Let people control this ? */ + *valuep = LPA_100FULL | LPA_100HALF | LPA_10FULL | LPA_10HALF; + dv_store_2 (dest, *valuep); + break; + default: + dv_store_2 (dest, *valuep); + break; + } + + return nr_bytes; +} + +static void +attach_eth_phy_regs (struct hw *me, struct eth_phy *phy) +{ + address_word attach_address; + int attach_space; + unsigned attach_size; + reg_property_spec reg; + + if (hw_find_property (me, "reg") == NULL) + hw_abort (me, "Missing \"reg\" property"); + + if (!hw_find_reg_array_property (me, "reg", 0, ®)) + hw_abort (me, "\"reg\" property must contain three addr/size entries"); + + hw_unit_address_to_attach_address (hw_parent (me), + ®.address, + &attach_space, &attach_address, me); + hw_unit_size_to_attach_size (hw_parent (me), ®.size, &attach_size, me); + + if (attach_size != REG_PHY_SIZE) + hw_abort (me, "\"reg\" size must be %#x", REG_PHY_SIZE); + + hw_attach_address (hw_parent (me), + 0, attach_space, attach_address, attach_size, me); + + phy->base = attach_address; +} + +static void +eth_phy_finish (struct hw *me) +{ + struct eth_phy *phy; + + phy = HW_ZALLOC (me, struct eth_phy); + + set_hw_data (me, phy); + set_hw_io_read_buffer (me, eth_phy_io_read_buffer); + set_hw_io_write_buffer (me, eth_phy_io_write_buffer); + + attach_eth_phy_regs (me, phy); + + /* Initialize the PHY. */ + phy->regs[MII_PHYSID1] = 0; /* Unassigned Vendor */ + phy->regs[MII_PHYSID2] = 0xAD; /* Product */ +} + +#else + +static void +eth_phy_finish (struct hw *me) +{ + HW_TRACE ((me, "No linux/mii.h support found")); +} + +#endif + +const struct hw_descriptor dv_eth_phy_descriptor[] = { + {"eth_phy", eth_phy_finish,}, + {NULL, NULL}, +}; |