1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2011 - 2012 Advanced Micro Devices, Inc.
*
* 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; version 2 of the License.
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "Porting.h"
#include "AGESA.h"
#include "amdlib.h"
#include <arch/io.h>
#include <arch/romcc_io.h>
#include <device/pci_ids.h>
AGESA_STATUS AmdMemoryReadSPD (UINT32 unused1, UINT32 unused2, AGESA_READ_SPD_PARAMS *info);
#define DIMENSION(array)(sizeof (array)/ sizeof (array [0]))
/* SP5100 GPIO 53-56 contoled by SMBUS PCI_Reg 0x52 */
#define SP5100_GPIO53_56 0x52
/**
* TODO not support all GPIO yet
* @param reg -GPIO Cntrl Register
* @param out -GPIO bitmap
* @param out -GPIO enable bitmap
* @return old setting
*/
static u8 sp5100_set_gpio(u8 reg, u8 out, u8 enable)
{
u8 value, ret;
device_t sm_dev = PCI_DEV(0, 0x14, 0); //SMBUS
value = pci_read_config8(sm_dev, reg);
ret = value;
value &= ~(enable);
value |= out;
value &= ~(enable << 4);
pci_write_config8(sm_dev, reg, value);
return ret;
}
static void sp5100_restore_gpio(u8 reg, u8 value)
{
device_t sm_dev = PCI_DEV(0, 0x14, 0);
pci_write_config8(sm_dev, reg, value);
}
/*-----------------------------------------------------------------------------
*
* SPD address table - porting required
*/
static const UINT8 spdAddressLookup [8] [4] [2] = { // socket, channel, dimm
/* socket 0 */
{
{0xAC, 0xAE},
{0xA8, 0xAA},
{0xA4, 0xA6},
{0xA0, 0xA2},
},
/* socket 1 */
{
{0xAC, 0xAE},
{0xA8, 0xAA},
{0xA4, 0xA6},
{0xA0, 0xA2},
},
/* socket 2 */
{
{0xAC, 0xAE},
{0xA8, 0xAA},
{0xA4, 0xA6},
{0xA0, 0xA2},
},
/* socket 3 */
{
{0xAC, 0xAE},
{0xA8, 0xAA},
{0xA4, 0xA6},
{0xA0, 0xA2},
},
};
/*-----------------------------------------------------------------------------
*
* readSmbusByteData - read a single SPD byte from any offset
*/
static int readSmbusByteData (int iobase, int address, char *buffer, int offset)
{
unsigned int status;
UINT64 limit;
address |= 1; // set read bit
outb(0xFF, iobase + 0); // clear error status
outb(0x1F, iobase + 1); // clear error status
outb(offset, iobase + 3); // offset in eeprom
outb(address, iobase + 4); // slave address and read bit
outb(0x48, iobase + 2); // read byte command
// time limit to avoid hanging for unexpected error status (should never happen)
limit = __rdtsc () + 2000000000 / 10;
for (;;)
{
status = inb(iobase);
if (__rdtsc () > limit) break;
if ((status & 2) == 0) continue; // SMBusInterrupt not set, keep waiting
if ((status & 1) == 1) continue; // HostBusy set, keep waiting
break;
}
buffer [0] = inb(iobase + 5);
if (status == 2) status = 0; // check for done with no errors
return status;
}
/*-----------------------------------------------------------------------------
*
* readSmbusByte - read a single SPD byte from the default offset
* this function is faster function readSmbusByteData
*/
static int readSmbusByte (int iobase, int address, char *buffer)
{
unsigned int status;
UINT64 limit;
outb(0xFF, iobase + 0); // clear error status
outb(0x44, iobase + 2); // read command
// time limit to avoid hanging for unexpected error status
limit = __rdtsc () + 2000000000 / 10;
for (;;)
{
status = inb(iobase);
if (__rdtsc () > limit) break;
if ((status & 2) == 0) continue; // SMBusInterrupt not set, keep waiting
if ((status & 1) == 1) continue; // HostBusy set, keep waiting
break;
}
buffer [0] = inb(iobase + 5);
if (status == 2) status = 0; // check for done with no errors
return status;
}
/*---------------------------------------------------------------------------
*
* readspd - Read one or more SPD bytes from a DIMM.
* Start with offset zero and read sequentially.
* Optimization relies on autoincrement to avoid
* sending offset for every byte.
* Reads 128 bytes in 7-8 ms at 400 KHz.
*/
static int readspd (int iobase, int SmbusSlaveAddress, char *buffer, int count)
{
int index, error;
/* read the first byte using offset zero */
error = readSmbusByteData (iobase, SmbusSlaveAddress, buffer, 0);
if (error) {
return error;
}
/* read the remaining bytes using auto-increment for speed */
for (index = 1; index < count; index++)
{
error = readSmbusByte (iobase, SmbusSlaveAddress, buffer + index);
if (error)
return error;
}
return 0;
}
static void setupFch (int ioBase)
{
outb(66000000 / 400000 / 4, ioBase + 0x0E); /* set SMBus clock to 400 KHz */
}
AGESA_STATUS AmdMemoryReadSPD (UINT32 unused1, UINT32 unused2, AGESA_READ_SPD_PARAMS *info)
{
AGESA_STATUS status;
int spdAddress, ioBase;
u8 i2c_channel;
u8 backup;
device_t sm_dev;
if (info->SocketId >= DIMENSION (spdAddressLookup )) return AGESA_ERROR;
if (info->MemChannelId >= DIMENSION (spdAddressLookup[0] )) return AGESA_ERROR;
if (info->DimmId >= DIMENSION (spdAddressLookup[0][0])) return AGESA_ERROR;
i2c_channel = (UINT8) info->SocketId;
/* set ght i2c channel
* GPIO54,53 control the HC4052 S1,S0
* S1 S0 true table
* 0 0 channel 1 (Socket1)
* 0 1 channel 2 (Socket2)
* 1 0 channel 3 (Socket3)
* 1 1 channel 4 (Socket4)
*/
backup = sp5100_set_gpio(SP5100_GPIO53_56, i2c_channel, 0x03);
spdAddress = spdAddressLookup [info->SocketId] [info->MemChannelId] [info->DimmId];
if (spdAddress == 0)
return AGESA_ERROR;
/*
* SMBus Base Address was set during southbridge early setup.
* e.g. sb700 IO mapped SMBUS_IO_BASE 0x6000, CIMX using 0xB00 as default
*/
sm_dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_SB700_SM), 0);
ioBase = pci_read_config32(sm_dev, 0x90) & (0xFFFFFFF0);
setupFch(ioBase);
status = readspd(ioBase, spdAddress, (void *)info->Buffer, 256);
sp5100_restore_gpio(SP5100_GPIO53_56, backup);
return status;
}
|
