2 * linux/arch/arm/mach-omap1/id.c
4 * OMAP1 CPU identification code
6 * Copyright (C) 2004 Nokia Corporation
7 * Written by Tony Lindgren <tony@atomide.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/init.h>
18 #include <asm/system_info.h>
21 #define OMAP_DIE_ID_0 0xfffe1800
22 #define OMAP_DIE_ID_1 0xfffe1804
23 #define OMAP_PRODUCTION_ID_0 0xfffe2000
24 #define OMAP_PRODUCTION_ID_1 0xfffe2004
25 #define OMAP32_ID_0 0xfffed400
26 #define OMAP32_ID_1 0xfffed404
29 u16 jtag_id
; /* Used to determine OMAP type */
30 u8 die_rev
; /* Processor revision */
31 u32 omap_id
; /* OMAP revision */
32 u32 type
; /* Cpu id bits [31:08], cpu class bits [07:00] */
35 static unsigned int omap_revision
;
37 /* Register values to detect the OMAP version */
38 static struct omap_id omap_ids
[] __initdata
= {
39 { .jtag_id
= 0xb574, .die_rev
= 0x2, .omap_id
= 0x03310315, .type
= 0x03100000},
40 { .jtag_id
= 0x355f, .die_rev
= 0x0, .omap_id
= 0x03320000, .type
= 0x07300100},
41 { .jtag_id
= 0xb55f, .die_rev
= 0x0, .omap_id
= 0x03320000, .type
= 0x07300300},
42 { .jtag_id
= 0xb62c, .die_rev
= 0x1, .omap_id
= 0x03320500, .type
= 0x08500000},
43 { .jtag_id
= 0xb470, .die_rev
= 0x0, .omap_id
= 0x03310100, .type
= 0x15100000},
44 { .jtag_id
= 0xb576, .die_rev
= 0x0, .omap_id
= 0x03320000, .type
= 0x16100000},
45 { .jtag_id
= 0xb576, .die_rev
= 0x2, .omap_id
= 0x03320100, .type
= 0x16110000},
46 { .jtag_id
= 0xb576, .die_rev
= 0x3, .omap_id
= 0x03320100, .type
= 0x16100c00},
47 { .jtag_id
= 0xb576, .die_rev
= 0x0, .omap_id
= 0x03320200, .type
= 0x16100d00},
48 { .jtag_id
= 0xb613, .die_rev
= 0x0, .omap_id
= 0x03320300, .type
= 0x1610ef00},
49 { .jtag_id
= 0xb613, .die_rev
= 0x0, .omap_id
= 0x03320300, .type
= 0x1610ef00},
50 { .jtag_id
= 0xb576, .die_rev
= 0x1, .omap_id
= 0x03320100, .type
= 0x16110000},
51 { .jtag_id
= 0xb58c, .die_rev
= 0x2, .omap_id
= 0x03320200, .type
= 0x16110b00},
52 { .jtag_id
= 0xb58c, .die_rev
= 0x3, .omap_id
= 0x03320200, .type
= 0x16110c00},
53 { .jtag_id
= 0xb65f, .die_rev
= 0x0, .omap_id
= 0x03320400, .type
= 0x16212300},
54 { .jtag_id
= 0xb65f, .die_rev
= 0x1, .omap_id
= 0x03320400, .type
= 0x16212300},
55 { .jtag_id
= 0xb65f, .die_rev
= 0x1, .omap_id
= 0x03320500, .type
= 0x16212300},
56 { .jtag_id
= 0xb5f7, .die_rev
= 0x0, .omap_id
= 0x03330000, .type
= 0x17100000},
57 { .jtag_id
= 0xb5f7, .die_rev
= 0x1, .omap_id
= 0x03330100, .type
= 0x17100000},
58 { .jtag_id
= 0xb5f7, .die_rev
= 0x2, .omap_id
= 0x03330100, .type
= 0x17100000},
61 unsigned int omap_rev(void)
65 EXPORT_SYMBOL(omap_rev
);
68 * Get OMAP type from PROD_ID.
69 * 1710 has the PROD_ID in bits 15:00, not in 16:01 as documented in TRM.
70 * 1510 PROD_ID is empty, and 1610 PROD_ID does not make sense.
71 * Undocumented register in TEST BLOCK is used as fallback; This seems to
72 * work on 1510, 1610 & 1710. The official way hopefully will work in future
75 static u16 __init
omap_get_jtag_id(void)
79 prod_id
= omap_readl(OMAP_PRODUCTION_ID_1
);
80 omap_id
= omap_readl(OMAP32_ID_1
);
82 /* Check for unusable OMAP_PRODUCTION_ID_1 on 1611B/5912 and 730/850 */
83 if (((prod_id
>> 20) == 0) || (prod_id
== omap_id
))
91 /* Use OMAP32_ID_1 as fallback */
92 prod_id
= ((omap_id
>> 12) & 0xffff);
98 * Get OMAP revision from DIE_REV.
99 * Early 1710 processors may have broken OMAP_DIE_ID, it contains PROD_ID.
100 * Undocumented register in the TEST BLOCK is used as fallback.
101 * REVISIT: This does not seem to work on 1510
103 static u8 __init
omap_get_die_rev(void)
107 die_rev
= omap_readl(OMAP_DIE_ID_1
);
109 /* Check for broken OMAP_DIE_ID on early 1710 */
110 if (((die_rev
>> 12) & 0xffff) == omap_get_jtag_id())
113 die_rev
= (die_rev
>> 17) & 0xf;
117 die_rev
= (omap_readl(OMAP32_ID_1
) >> 28) & 0xf;
122 void __init
omap_check_revision(void)
130 jtag_id
= omap_get_jtag_id();
131 die_rev
= omap_get_die_rev();
132 omap_id
= omap_readl(OMAP32_ID_0
);
135 printk(KERN_DEBUG
"OMAP_DIE_ID_0: 0x%08x\n", omap_readl(OMAP_DIE_ID_0
));
136 printk(KERN_DEBUG
"OMAP_DIE_ID_1: 0x%08x DIE_REV: %i\n",
137 omap_readl(OMAP_DIE_ID_1
),
138 (omap_readl(OMAP_DIE_ID_1
) >> 17) & 0xf);
139 printk(KERN_DEBUG
"OMAP_PRODUCTION_ID_0: 0x%08x\n",
140 omap_readl(OMAP_PRODUCTION_ID_0
));
141 printk(KERN_DEBUG
"OMAP_PRODUCTION_ID_1: 0x%08x JTAG_ID: 0x%04x\n",
142 omap_readl(OMAP_PRODUCTION_ID_1
),
143 omap_readl(OMAP_PRODUCTION_ID_1
) & 0xffff);
144 printk(KERN_DEBUG
"OMAP32_ID_0: 0x%08x\n", omap_readl(OMAP32_ID_0
));
145 printk(KERN_DEBUG
"OMAP32_ID_1: 0x%08x\n", omap_readl(OMAP32_ID_1
));
146 printk(KERN_DEBUG
"JTAG_ID: 0x%04x DIE_REV: %i\n", jtag_id
, die_rev
);
149 system_serial_high
= omap_readl(OMAP_DIE_ID_0
);
150 system_serial_low
= omap_readl(OMAP_DIE_ID_1
);
152 /* First check only the major version in a safe way */
153 for (i
= 0; i
< ARRAY_SIZE(omap_ids
); i
++) {
154 if (jtag_id
== (omap_ids
[i
].jtag_id
)) {
155 omap_revision
= omap_ids
[i
].type
;
160 /* Check if we can find the die revision */
161 for (i
= 0; i
< ARRAY_SIZE(omap_ids
); i
++) {
162 if (jtag_id
== omap_ids
[i
].jtag_id
&& die_rev
== omap_ids
[i
].die_rev
) {
163 omap_revision
= omap_ids
[i
].type
;
168 /* Finally check also the omap_id */
169 for (i
= 0; i
< ARRAY_SIZE(omap_ids
); i
++) {
170 if (jtag_id
== omap_ids
[i
].jtag_id
171 && die_rev
== omap_ids
[i
].die_rev
172 && omap_id
== omap_ids
[i
].omap_id
) {
173 omap_revision
= omap_ids
[i
].type
;
178 /* Add the cpu class info (7xx, 15xx, 16xx, 24xx) */
179 cpu_type
= omap_revision
>> 24;
184 omap_revision
|= 0x07;
188 omap_revision
|= 0x15;
192 omap_revision
|= 0x16;
195 printk(KERN_INFO
"Unknown OMAP cpu type: 0x%02x\n", cpu_type
);
198 printk(KERN_INFO
"OMAP%04x", omap_revision
>> 16);
199 if ((omap_revision
>> 8) & 0xff)
200 printk(KERN_INFO
"%x", (omap_revision
>> 8) & 0xff);
201 printk(KERN_INFO
" revision %i handled as %02xxx id: %08x%08x\n",
202 die_rev
, omap_revision
& 0xff, system_serial_low
,