| 1 | /* Ethernet Physical Receiver model. |
| 2 | |
| 3 | Copyright (C) 2010-2015 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 | |
| 34 | struct 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 | |
| 43 | static 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 | |
| 76 | static unsigned |
| 77 | eth_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 | |
| 110 | static unsigned |
| 111 | eth_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 | |
| 147 | static void |
| 148 | attach_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 | |
| 175 | static void |
| 176 | eth_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 | |
| 195 | static void |
| 196 | eth_phy_finish (struct hw *me) |
| 197 | { |
| 198 | HW_TRACE ((me, "No linux/mii.h support found")); |
| 199 | } |
| 200 | |
| 201 | #endif |
| 202 | |
| 203 | const struct hw_descriptor dv_eth_phy_descriptor[] = |
| 204 | { |
| 205 | {"eth_phy", eth_phy_finish,}, |
| 206 | {NULL, NULL}, |
| 207 | }; |