1/* Ethernet Physical Receiver model. 2 3 Copyright (C) 2010-2020 Free Software Foundation, Inc. 4 Contributed by Analog Devices, Inc. 5 6 This file is part of simulators. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 3 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 20 21#include "config.h" 22 23#include "sim-main.h" 24#include "devices.h" 25 26#if defined (HAVE_LINUX_MII_H) && defined (HAVE_LINUX_TYPES_H) 27 28/* Workaround old/broken linux headers. */ 29#include <linux/types.h> 30#include <linux/mii.h> 31 32#define REG_PHY_SIZE 0x20 33 34struct eth_phy 35{ 36 bu32 base; 37 bu16 regs[REG_PHY_SIZE]; 38}; 39#define reg_base() offsetof(struct eth_phy, regs[0]) 40#define reg_offset(reg) (offsetof(struct eth_phy, reg) - reg_base()) 41#define reg_idx(reg) (reg_offset (reg) / 4) 42 43static const char * const reg_names[] = 44{ 45 [MII_BMCR ] = "MII_BMCR", 46 [MII_BMSR ] = "MII_BMSR", 47 [MII_PHYSID1 ] = "MII_PHYSID1", 48 [MII_PHYSID2 ] = "MII_PHYSID2", 49 [MII_ADVERTISE ] = "MII_ADVERTISE", 50 [MII_LPA ] = "MII_LPA", 51 [MII_EXPANSION ] = "MII_EXPANSION", 52#ifdef MII_CTRL1000 53 [MII_CTRL1000 ] = "MII_CTRL1000", 54#endif 55#ifdef MII_STAT1000 56 [MII_STAT1000 ] = "MII_STAT1000", 57#endif 58#ifdef MII_ESTATUS 59 [MII_ESTATUS ] = "MII_ESTATUS", 60#endif 61 [MII_DCOUNTER ] = "MII_DCOUNTER", 62 [MII_FCSCOUNTER ] = "MII_FCSCOUNTER", 63 [MII_NWAYTEST ] = "MII_NWAYTEST", 64 [MII_RERRCOUNTER] = "MII_RERRCOUNTER", 65 [MII_SREVISION ] = "MII_SREVISION", 66 [MII_RESV1 ] = "MII_RESV1", 67 [MII_LBRERROR ] = "MII_LBRERROR", 68 [MII_PHYADDR ] = "MII_PHYADDR", 69 [MII_RESV2 ] = "MII_RESV2", 70 [MII_TPISTATUS ] = "MII_TPISTATUS", 71 [MII_NCONFIG ] = "MII_NCONFIG", 72}; 73#define mmr_name(off) (reg_names[off] ? : "<INV>") 74#define mmr_off reg_off 75 76static unsigned 77eth_phy_io_write_buffer (struct hw *me, const void *source, 78 int space, address_word addr, unsigned nr_bytes) 79{ 80 struct eth_phy *phy = hw_data (me); 81 bu16 reg_off; 82 bu16 value; 83 bu16 *valuep; 84 85 value = dv_load_2 (source); 86 87 reg_off = addr - phy->base; 88 valuep = (void *)((unsigned long)phy + reg_base() + reg_off); 89 90 HW_TRACE_WRITE (); 91 92 switch (reg_off) 93 { 94 case MII_BMCR: 95 *valuep = value; 96 break; 97 case MII_PHYSID1: 98 case MII_PHYSID2: 99 /* Discard writes to these. */ 100 break; 101 default: 102 /* XXX: Discard writes to unknown regs ? */ 103 *valuep = value; 104 break; 105 } 106 107 return nr_bytes; 108} 109 110static unsigned 111eth_phy_io_read_buffer (struct hw *me, void *dest, 112 int space, address_word addr, unsigned nr_bytes) 113{ 114 struct eth_phy *phy = hw_data (me); 115 bu16 reg_off; 116 bu16 *valuep; 117 118 reg_off = addr - phy->base; 119 valuep = (void *)((unsigned long)phy + reg_base() + reg_off); 120 121 HW_TRACE_READ (); 122 123 switch (reg_off) 124 { 125 case MII_BMCR: 126 dv_store_2 (dest, *valuep); 127 break; 128 case MII_BMSR: 129 /* XXX: Let people control this ? */ 130 *valuep = BMSR_100FULL | BMSR_100HALF | BMSR_10FULL | BMSR_10HALF | 131 BMSR_ANEGCOMPLETE | BMSR_ANEGCAPABLE | BMSR_LSTATUS; 132 dv_store_2 (dest, *valuep); 133 break; 134 case MII_LPA: 135 /* XXX: Let people control this ? */ 136 *valuep = LPA_100FULL | LPA_100HALF | LPA_10FULL | LPA_10HALF; 137 dv_store_2 (dest, *valuep); 138 break; 139 default: 140 dv_store_2 (dest, *valuep); 141 break; 142 } 143 144 return nr_bytes; 145} 146 147static void 148attach_eth_phy_regs (struct hw *me, struct eth_phy *phy) 149{ 150 address_word attach_address; 151 int attach_space; 152 unsigned attach_size; 153 reg_property_spec reg; 154 155 if (hw_find_property (me, "reg") == NULL) 156 hw_abort (me, "Missing \"reg\" property"); 157 158 if (!hw_find_reg_array_property (me, "reg", 0, ®)) 159 hw_abort (me, "\"reg\" property must contain three addr/size entries"); 160 161 hw_unit_address_to_attach_address (hw_parent (me), 162 ®.address, 163 &attach_space, &attach_address, me); 164 hw_unit_size_to_attach_size (hw_parent (me), ®.size, &attach_size, me); 165 166 if (attach_size != REG_PHY_SIZE) 167 hw_abort (me, "\"reg\" size must be %#x", REG_PHY_SIZE); 168 169 hw_attach_address (hw_parent (me), 170 0, attach_space, attach_address, attach_size, me); 171 172 phy->base = attach_address; 173} 174 175static void 176eth_phy_finish (struct hw *me) 177{ 178 struct eth_phy *phy; 179 180 phy = HW_ZALLOC (me, struct eth_phy); 181 182 set_hw_data (me, phy); 183 set_hw_io_read_buffer (me, eth_phy_io_read_buffer); 184 set_hw_io_write_buffer (me, eth_phy_io_write_buffer); 185 186 attach_eth_phy_regs (me, phy); 187 188 /* Initialize the PHY. */ 189 phy->regs[MII_PHYSID1] = 0; /* Unassigned Vendor */ 190 phy->regs[MII_PHYSID2] = 0xAD; /* Product */ 191} 192 193#else 194 195static void 196eth_phy_finish (struct hw *me) 197{ 198 HW_TRACE ((me, "No linux/mii.h support found")); 199} 200 201#endif 202 203const struct hw_descriptor dv_eth_phy_descriptor[] = 204{ 205 {"eth_phy", eth_phy_finish,}, 206 {NULL, NULL}, 207}; 208