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ef016f83 MF |
1 | /* Ethernet Physical Receiver model. |
2 | ||
3 | Copyright (C) 2010-2011 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 | #ifdef HAVE_LINUX_MII_H | |
27 | ||
28 | /* Workaround old/broken linux headers. */ | |
29 | #define _LINUX_TYPES_H | |
30 | #define __u16 unsigned short | |
31 | #include <linux/mii.h> | |
32 | ||
33 | #define REG_PHY_SIZE 0x20 | |
34 | ||
35 | struct eth_phy | |
36 | { | |
37 | bu32 base; | |
38 | bu16 regs[REG_PHY_SIZE]; | |
39 | }; | |
40 | #define reg_base() offsetof(struct eth_phy, regs[0]) | |
41 | #define reg_offset(reg) (offsetof(struct eth_phy, reg) - reg_base()) | |
42 | #define reg_idx(reg) (reg_offset (reg) / 4) | |
43 | ||
990d19fd MF |
44 | static const char * const reg_names[] = |
45 | { | |
ef016f83 MF |
46 | [MII_BMCR ] = "MII_BMCR", |
47 | [MII_BMSR ] = "MII_BMSR", | |
48 | [MII_PHYSID1 ] = "MII_PHYSID1", | |
49 | [MII_PHYSID2 ] = "MII_PHYSID2", | |
50 | [MII_ADVERTISE ] = "MII_ADVERTISE", | |
51 | [MII_LPA ] = "MII_LPA", | |
52 | [MII_EXPANSION ] = "MII_EXPANSION", | |
53 | #ifdef MII_CTRL1000 | |
54 | [MII_CTRL1000 ] = "MII_CTRL1000", | |
55 | #endif | |
56 | #ifdef MII_STAT1000 | |
57 | [MII_STAT1000 ] = "MII_STAT1000", | |
58 | #endif | |
59 | #ifdef MII_ESTATUS | |
60 | [MII_ESTATUS ] = "MII_ESTATUS", | |
61 | #endif | |
62 | [MII_DCOUNTER ] = "MII_DCOUNTER", | |
63 | [MII_FCSCOUNTER ] = "MII_FCSCOUNTER", | |
64 | [MII_NWAYTEST ] = "MII_NWAYTEST", | |
65 | [MII_RERRCOUNTER] = "MII_RERRCOUNTER", | |
66 | [MII_SREVISION ] = "MII_SREVISION", | |
67 | [MII_RESV1 ] = "MII_RESV1", | |
68 | [MII_LBRERROR ] = "MII_LBRERROR", | |
69 | [MII_PHYADDR ] = "MII_PHYADDR", | |
70 | [MII_RESV2 ] = "MII_RESV2", | |
71 | [MII_TPISTATUS ] = "MII_TPISTATUS", | |
72 | [MII_NCONFIG ] = "MII_NCONFIG", | |
73 | }; | |
74 | #define mmr_name(off) (reg_names[off] ? : "<INV>") | |
75 | #define mmr_off reg_off | |
76 | ||
77 | static unsigned | |
78 | eth_phy_io_write_buffer (struct hw *me, const void *source, | |
79 | int space, address_word addr, unsigned nr_bytes) | |
80 | { | |
81 | struct eth_phy *phy = hw_data (me); | |
82 | bu16 reg_off; | |
83 | bu16 value; | |
84 | bu16 *valuep; | |
85 | ||
86 | value = dv_load_2 (source); | |
87 | ||
88 | reg_off = addr - phy->base; | |
89 | valuep = (void *)((unsigned long)phy + reg_base() + reg_off); | |
90 | ||
91 | HW_TRACE_WRITE (); | |
92 | ||
93 | switch (reg_off) | |
94 | { | |
95 | case MII_BMCR: | |
96 | *valuep = value; | |
97 | break; | |
98 | case MII_PHYSID1: | |
99 | case MII_PHYSID2: | |
100 | /* Discard writes to these. */ | |
101 | break; | |
102 | default: | |
103 | /* XXX: Discard writes to unknown regs ? */ | |
104 | *valuep = value; | |
105 | break; | |
106 | } | |
107 | ||
108 | return nr_bytes; | |
109 | } | |
110 | ||
111 | static unsigned | |
112 | eth_phy_io_read_buffer (struct hw *me, void *dest, | |
113 | int space, address_word addr, unsigned nr_bytes) | |
114 | { | |
115 | struct eth_phy *phy = hw_data (me); | |
116 | bu16 reg_off; | |
117 | bu16 *valuep; | |
118 | ||
119 | reg_off = addr - phy->base; | |
120 | valuep = (void *)((unsigned long)phy + reg_base() + reg_off); | |
121 | ||
122 | HW_TRACE_READ (); | |
123 | ||
124 | switch (reg_off) | |
125 | { | |
126 | case MII_BMCR: | |
127 | dv_store_2 (dest, *valuep); | |
128 | break; | |
129 | case MII_BMSR: | |
130 | /* XXX: Let people control this ? */ | |
131 | *valuep = BMSR_100FULL | BMSR_100HALF | BMSR_10FULL | BMSR_10HALF | | |
132 | BMSR_ANEGCOMPLETE | BMSR_ANEGCAPABLE | BMSR_LSTATUS; | |
133 | dv_store_2 (dest, *valuep); | |
134 | break; | |
135 | case MII_LPA: | |
136 | /* XXX: Let people control this ? */ | |
137 | *valuep = LPA_100FULL | LPA_100HALF | LPA_10FULL | LPA_10HALF; | |
138 | dv_store_2 (dest, *valuep); | |
139 | break; | |
140 | default: | |
141 | dv_store_2 (dest, *valuep); | |
142 | break; | |
143 | } | |
144 | ||
145 | return nr_bytes; | |
146 | } | |
147 | ||
148 | static void | |
149 | attach_eth_phy_regs (struct hw *me, struct eth_phy *phy) | |
150 | { | |
151 | address_word attach_address; | |
152 | int attach_space; | |
153 | unsigned attach_size; | |
154 | reg_property_spec reg; | |
155 | ||
156 | if (hw_find_property (me, "reg") == NULL) | |
157 | hw_abort (me, "Missing \"reg\" property"); | |
158 | ||
159 | if (!hw_find_reg_array_property (me, "reg", 0, ®)) | |
160 | hw_abort (me, "\"reg\" property must contain three addr/size entries"); | |
161 | ||
162 | hw_unit_address_to_attach_address (hw_parent (me), | |
163 | ®.address, | |
164 | &attach_space, &attach_address, me); | |
165 | hw_unit_size_to_attach_size (hw_parent (me), ®.size, &attach_size, me); | |
166 | ||
167 | if (attach_size != REG_PHY_SIZE) | |
168 | hw_abort (me, "\"reg\" size must be %#x", REG_PHY_SIZE); | |
169 | ||
170 | hw_attach_address (hw_parent (me), | |
171 | 0, attach_space, attach_address, attach_size, me); | |
172 | ||
173 | phy->base = attach_address; | |
174 | } | |
175 | ||
176 | static void | |
177 | eth_phy_finish (struct hw *me) | |
178 | { | |
179 | struct eth_phy *phy; | |
180 | ||
181 | phy = HW_ZALLOC (me, struct eth_phy); | |
182 | ||
183 | set_hw_data (me, phy); | |
184 | set_hw_io_read_buffer (me, eth_phy_io_read_buffer); | |
185 | set_hw_io_write_buffer (me, eth_phy_io_write_buffer); | |
186 | ||
187 | attach_eth_phy_regs (me, phy); | |
188 | ||
189 | /* Initialize the PHY. */ | |
190 | phy->regs[MII_PHYSID1] = 0; /* Unassigned Vendor */ | |
191 | phy->regs[MII_PHYSID2] = 0xAD; /* Product */ | |
192 | } | |
193 | ||
194 | #else | |
195 | ||
196 | static void | |
197 | eth_phy_finish (struct hw *me) | |
198 | { | |
199 | HW_TRACE ((me, "No linux/mii.h support found")); | |
200 | } | |
201 | ||
202 | #endif | |
203 | ||
81d126c3 MF |
204 | const struct hw_descriptor dv_eth_phy_descriptor[] = |
205 | { | |
ef016f83 MF |
206 | {"eth_phy", eth_phy_finish,}, |
207 | {NULL, NULL}, | |
208 | }; |