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
|
/*
* linux/arch/arm/mach-omap1/id.c
*
* OMAP1 CPU identification code
*
* Copyright (C) 2004 Nokia Corporation
* Written by Tony Lindgren <tony@atomide.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <asm/system_info.h>
#include <plat/cpu.h>
#include <mach/hardware.h>
#define OMAP_DIE_ID_0 0xfffe1800
#define OMAP_DIE_ID_1 0xfffe1804
#define OMAP_PRODUCTION_ID_0 0xfffe2000
#define OMAP_PRODUCTION_ID_1 0xfffe2004
#define OMAP32_ID_0 0xfffed400
#define OMAP32_ID_1 0xfffed404
struct omap_id {
u16 jtag_id; /* Used to determine OMAP type */
u8 die_rev; /* Processor revision */
u32 omap_id; /* OMAP revision */
u32 type; /* Cpu id bits [31:08], cpu class bits [07:00] */
};
static unsigned int omap_revision;
/* Register values to detect the OMAP version */
static struct omap_id omap_ids[] __initdata = {
{ .jtag_id = 0xb574, .die_rev = 0x2, .omap_id = 0x03310315, .type = 0x03100000},
{ .jtag_id = 0x355f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300100},
{ .jtag_id = 0xb55f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300300},
{ .jtag_id = 0xb62c, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x08500000},
{ .jtag_id = 0xb470, .die_rev = 0x0, .omap_id = 0x03310100, .type = 0x15100000},
{ .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x16100000},
{ .jtag_id = 0xb576, .die_rev = 0x2, .omap_id = 0x03320100, .type = 0x16110000},
{ .jtag_id = 0xb576, .die_rev = 0x3, .omap_id = 0x03320100, .type = 0x16100c00},
{ .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320200, .type = 0x16100d00},
{ .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
{ .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
{ .jtag_id = 0xb576, .die_rev = 0x1, .omap_id = 0x03320100, .type = 0x16110000},
{ .jtag_id = 0xb58c, .die_rev = 0x2, .omap_id = 0x03320200, .type = 0x16110b00},
{ .jtag_id = 0xb58c, .die_rev = 0x3, .omap_id = 0x03320200, .type = 0x16110c00},
{ .jtag_id = 0xb65f, .die_rev = 0x0, .omap_id = 0x03320400, .type = 0x16212300},
{ .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320400, .type = 0x16212300},
{ .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x16212300},
{ .jtag_id = 0xb5f7, .die_rev = 0x0, .omap_id = 0x03330000, .type = 0x17100000},
{ .jtag_id = 0xb5f7, .die_rev = 0x1, .omap_id = 0x03330100, .type = 0x17100000},
{ .jtag_id = 0xb5f7, .die_rev = 0x2, .omap_id = 0x03330100, .type = 0x17100000},
};
unsigned int omap_rev(void)
{
return omap_revision;
}
EXPORT_SYMBOL(omap_rev);
/*
* Get OMAP type from PROD_ID.
* 1710 has the PROD_ID in bits 15:00, not in 16:01 as documented in TRM.
* 1510 PROD_ID is empty, and 1610 PROD_ID does not make sense.
* Undocumented register in TEST BLOCK is used as fallback; This seems to
* work on 1510, 1610 & 1710. The official way hopefully will work in future
* processors.
*/
static u16 __init omap_get_jtag_id(void)
{
u32 prod_id, omap_id;
prod_id = omap_readl(OMAP_PRODUCTION_ID_1);
omap_id = omap_readl(OMAP32_ID_1);
/* Check for unusable OMAP_PRODUCTION_ID_1 on 1611B/5912 and 730/850 */
if (((prod_id >> 20) == 0) || (prod_id == omap_id))
prod_id = 0;
else
prod_id &= 0xffff;
if (prod_id)
return prod_id;
/* Use OMAP32_ID_1 as fallback */
prod_id = ((omap_id >> 12) & 0xffff);
return prod_id;
}
/*
* Get OMAP revision from DIE_REV.
* Early 1710 processors may have broken OMAP_DIE_ID, it contains PROD_ID.
* Undocumented register in the TEST BLOCK is used as fallback.
* REVISIT: This does not seem to work on 1510
*/
static u8 __init omap_get_die_rev(void)
{
u32 die_rev;
die_rev = omap_readl(OMAP_DIE_ID_1);
/* Check for broken OMAP_DIE_ID on early 1710 */
if (((die_rev >> 12) & 0xffff) == omap_get_jtag_id())
die_rev = 0;
die_rev = (die_rev >> 17) & 0xf;
if (die_rev)
return die_rev;
die_rev = (omap_readl(OMAP32_ID_1) >> 28) & 0xf;
return die_rev;
}
void __init omap_check_revision(void)
{
int i;
u16 jtag_id;
u8 die_rev;
u32 omap_id;
u8 cpu_type;
jtag_id = omap_get_jtag_id();
die_rev = omap_get_die_rev();
omap_id = omap_readl(OMAP32_ID_0);
#ifdef DEBUG
printk(KERN_DEBUG "OMAP_DIE_ID_0: 0x%08x\n", omap_readl(OMAP_DIE_ID_0));
printk(KERN_DEBUG "OMAP_DIE_ID_1: 0x%08x DIE_REV: %i\n",
omap_readl(OMAP_DIE_ID_1),
(omap_readl(OMAP_DIE_ID_1) >> 17) & 0xf);
printk(KERN_DEBUG "OMAP_PRODUCTION_ID_0: 0x%08x\n",
omap_readl(OMAP_PRODUCTION_ID_0));
printk(KERN_DEBUG "OMAP_PRODUCTION_ID_1: 0x%08x JTAG_ID: 0x%04x\n",
omap_readl(OMAP_PRODUCTION_ID_1),
omap_readl(OMAP_PRODUCTION_ID_1) & 0xffff);
printk(KERN_DEBUG "OMAP32_ID_0: 0x%08x\n", omap_readl(OMAP32_ID_0));
printk(KERN_DEBUG "OMAP32_ID_1: 0x%08x\n", omap_readl(OMAP32_ID_1));
printk(KERN_DEBUG "JTAG_ID: 0x%04x DIE_REV: %i\n", jtag_id, die_rev);
#endif
system_serial_high = omap_readl(OMAP_DIE_ID_0);
system_serial_low = omap_readl(OMAP_DIE_ID_1);
/* First check only the major version in a safe way */
for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
if (jtag_id == (omap_ids[i].jtag_id)) {
omap_revision = omap_ids[i].type;
break;
}
}
/* Check if we can find the die revision */
for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
if (jtag_id == omap_ids[i].jtag_id && die_rev == omap_ids[i].die_rev) {
omap_revision = omap_ids[i].type;
break;
}
}
/* Finally check also the omap_id */
for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
if (jtag_id == omap_ids[i].jtag_id
&& die_rev == omap_ids[i].die_rev
&& omap_id == omap_ids[i].omap_id) {
omap_revision = omap_ids[i].type;
break;
}
}
/* Add the cpu class info (7xx, 15xx, 16xx, 24xx) */
cpu_type = omap_revision >> 24;
switch (cpu_type) {
case 0x07:
case 0x08:
omap_revision |= 0x07;
break;
case 0x03:
case 0x15:
omap_revision |= 0x15;
break;
case 0x16:
case 0x17:
omap_revision |= 0x16;
break;
default:
printk(KERN_INFO "Unknown OMAP cpu type: 0x%02x\n", cpu_type);
}
printk(KERN_INFO "OMAP%04x", omap_revision >> 16);
if ((omap_revision >> 8) & 0xff)
printk(KERN_INFO "%x", (omap_revision >> 8) & 0xff);
printk(KERN_INFO " revision %i handled as %02xxx id: %08x%08x\n",
die_rev, omap_revision & 0xff, system_serial_low,
system_serial_high);
}
|
