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Tony Lindgrenf577ffd2005-07-10 19:58:12 +01001/*
2 * linux/arch/arm/mach-omap1/id.c
3 *
4 * OMAP1 CPU identification code
5 *
6 * Copyright (C) 2004 Nokia Corporation
7 * Written by Tony Lindgren <tony@atomide.com>
8 *
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.
12 */
13
Tony Lindgrenf577ffd2005-07-10 19:58:12 +010014#include <linux/module.h>
15#include <linux/kernel.h>
16#include <linux/init.h>
Russell Kingfced80c2008-09-06 12:10:45 +010017#include <linux/io.h>
Tony Lindgrence491cf2009-10-20 09:40:47 -070018#include <plat/cpu.h>
Tony Lindgrenf577ffd2005-07-10 19:58:12 +010019
Tony Lindgren3179a012005-11-10 14:26:48 +000020#define OMAP_DIE_ID_0 0xfffe1800
21#define OMAP_DIE_ID_1 0xfffe1804
22#define OMAP_PRODUCTION_ID_0 0xfffe2000
23#define OMAP_PRODUCTION_ID_1 0xfffe2004
24#define OMAP32_ID_0 0xfffed400
25#define OMAP32_ID_1 0xfffed404
26
Tony Lindgrenf577ffd2005-07-10 19:58:12 +010027struct omap_id {
28 u16 jtag_id; /* Used to determine OMAP type */
29 u8 die_rev; /* Processor revision */
30 u32 omap_id; /* OMAP revision */
31 u32 type; /* Cpu id bits [31:08], cpu class bits [07:00] */
32};
33
Lauri Leukkunen84a34342008-12-10 17:36:31 -080034static unsigned int omap_revision;
35
Tony Lindgrenf577ffd2005-07-10 19:58:12 +010036/* Register values to detect the OMAP version */
37static struct omap_id omap_ids[] __initdata = {
Tony Lindgren3179a012005-11-10 14:26:48 +000038 { .jtag_id = 0xb574, .die_rev = 0x2, .omap_id = 0x03310315, .type = 0x03100000},
Tony Lindgrenf577ffd2005-07-10 19:58:12 +010039 { .jtag_id = 0x355f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300100},
40 { .jtag_id = 0xb55f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300300},
Angelo Arrifanof5ee2fc2009-09-24 16:23:13 -070041 { .jtag_id = 0xb62c, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x08500000},
Tony Lindgrenf577ffd2005-07-10 19:58:12 +010042 { .jtag_id = 0xb470, .die_rev = 0x0, .omap_id = 0x03310100, .type = 0x15100000},
43 { .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x16100000},
44 { .jtag_id = 0xb576, .die_rev = 0x2, .omap_id = 0x03320100, .type = 0x16110000},
45 { .jtag_id = 0xb576, .die_rev = 0x3, .omap_id = 0x03320100, .type = 0x16100c00},
46 { .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320200, .type = 0x16100d00},
47 { .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
48 { .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
49 { .jtag_id = 0xb576, .die_rev = 0x1, .omap_id = 0x03320100, .type = 0x16110000},
50 { .jtag_id = 0xb58c, .die_rev = 0x2, .omap_id = 0x03320200, .type = 0x16110b00},
51 { .jtag_id = 0xb58c, .die_rev = 0x3, .omap_id = 0x03320200, .type = 0x16110c00},
52 { .jtag_id = 0xb65f, .die_rev = 0x0, .omap_id = 0x03320400, .type = 0x16212300},
53 { .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320400, .type = 0x16212300},
54 { .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x16212300},
55 { .jtag_id = 0xb5f7, .die_rev = 0x0, .omap_id = 0x03330000, .type = 0x17100000},
56 { .jtag_id = 0xb5f7, .die_rev = 0x1, .omap_id = 0x03330100, .type = 0x17100000},
57 { .jtag_id = 0xb5f7, .die_rev = 0x2, .omap_id = 0x03330100, .type = 0x17100000},
58};
59
Lauri Leukkunen84a34342008-12-10 17:36:31 -080060unsigned int omap_rev(void)
61{
62 return omap_revision;
63}
64EXPORT_SYMBOL(omap_rev);
65
Tony Lindgrenf577ffd2005-07-10 19:58:12 +010066/*
67 * Get OMAP type from PROD_ID.
68 * 1710 has the PROD_ID in bits 15:00, not in 16:01 as documented in TRM.
69 * 1510 PROD_ID is empty, and 1610 PROD_ID does not make sense.
70 * Undocumented register in TEST BLOCK is used as fallback; This seems to
71 * work on 1510, 1610 & 1710. The official way hopefully will work in future
72 * processors.
73 */
74static u16 __init omap_get_jtag_id(void)
75{
76 u32 prod_id, omap_id;
77
78 prod_id = omap_readl(OMAP_PRODUCTION_ID_1);
79 omap_id = omap_readl(OMAP32_ID_1);
80
Zebediah C. McClureae302f42009-03-23 18:07:39 -070081 /* Check for unusable OMAP_PRODUCTION_ID_1 on 1611B/5912 and 730/850 */
Tony Lindgrenf577ffd2005-07-10 19:58:12 +010082 if (((prod_id >> 20) == 0) || (prod_id == omap_id))
83 prod_id = 0;
84 else
85 prod_id &= 0xffff;
86
87 if (prod_id)
88 return prod_id;
89
90 /* Use OMAP32_ID_1 as fallback */
91 prod_id = ((omap_id >> 12) & 0xffff);
92
93 return prod_id;
94}
95
96/*
97 * Get OMAP revision from DIE_REV.
98 * Early 1710 processors may have broken OMAP_DIE_ID, it contains PROD_ID.
99 * Undocumented register in the TEST BLOCK is used as fallback.
100 * REVISIT: This does not seem to work on 1510
101 */
102static u8 __init omap_get_die_rev(void)
103{
104 u32 die_rev;
105
106 die_rev = omap_readl(OMAP_DIE_ID_1);
107
108 /* Check for broken OMAP_DIE_ID on early 1710 */
109 if (((die_rev >> 12) & 0xffff) == omap_get_jtag_id())
110 die_rev = 0;
111
112 die_rev = (die_rev >> 17) & 0xf;
113 if (die_rev)
114 return die_rev;
115
116 die_rev = (omap_readl(OMAP32_ID_1) >> 28) & 0xf;
117
118 return die_rev;
119}
120
121void __init omap_check_revision(void)
122{
123 int i;
124 u16 jtag_id;
125 u8 die_rev;
126 u32 omap_id;
127 u8 cpu_type;
128
129 jtag_id = omap_get_jtag_id();
130 die_rev = omap_get_die_rev();
131 omap_id = omap_readl(OMAP32_ID_0);
132
133#ifdef DEBUG
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800134 printk(KERN_DEBUG "OMAP_DIE_ID_0: 0x%08x\n", omap_readl(OMAP_DIE_ID_0));
135 printk(KERN_DEBUG "OMAP_DIE_ID_1: 0x%08x DIE_REV: %i\n",
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100136 omap_readl(OMAP_DIE_ID_1),
137 (omap_readl(OMAP_DIE_ID_1) >> 17) & 0xf);
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800138 printk(KERN_DEBUG "OMAP_PRODUCTION_ID_0: 0x%08x\n",
139 omap_readl(OMAP_PRODUCTION_ID_0));
140 printk(KERN_DEBUG "OMAP_PRODUCTION_ID_1: 0x%08x JTAG_ID: 0x%04x\n",
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100141 omap_readl(OMAP_PRODUCTION_ID_1),
142 omap_readl(OMAP_PRODUCTION_ID_1) & 0xffff);
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800143 printk(KERN_DEBUG "OMAP32_ID_0: 0x%08x\n", omap_readl(OMAP32_ID_0));
144 printk(KERN_DEBUG "OMAP32_ID_1: 0x%08x\n", omap_readl(OMAP32_ID_1));
145 printk(KERN_DEBUG "JTAG_ID: 0x%04x DIE_REV: %i\n", jtag_id, die_rev);
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100146#endif
147
148 system_serial_high = omap_readl(OMAP_DIE_ID_0);
149 system_serial_low = omap_readl(OMAP_DIE_ID_1);
150
151 /* First check only the major version in a safe way */
152 for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
153 if (jtag_id == (omap_ids[i].jtag_id)) {
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800154 omap_revision = omap_ids[i].type;
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100155 break;
156 }
157 }
158
159 /* Check if we can find the die revision */
160 for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
161 if (jtag_id == omap_ids[i].jtag_id && die_rev == omap_ids[i].die_rev) {
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800162 omap_revision = omap_ids[i].type;
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100163 break;
164 }
165 }
166
167 /* Finally check also the omap_id */
168 for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
169 if (jtag_id == omap_ids[i].jtag_id
170 && die_rev == omap_ids[i].die_rev
171 && omap_id == omap_ids[i].omap_id) {
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800172 omap_revision = omap_ids[i].type;
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100173 break;
174 }
175 }
176
177 /* Add the cpu class info (7xx, 15xx, 16xx, 24xx) */
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800178 cpu_type = omap_revision >> 24;
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100179
180 switch (cpu_type) {
181 case 0x07:
Zebediah C. McClureae302f42009-03-23 18:07:39 -0700182 case 0x08:
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800183 omap_revision |= 0x07;
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100184 break;
Tony Lindgren3179a012005-11-10 14:26:48 +0000185 case 0x03:
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100186 case 0x15:
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800187 omap_revision |= 0x15;
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100188 break;
189 case 0x16:
190 case 0x17:
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800191 omap_revision |= 0x16;
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100192 break;
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100193 default:
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800194 printk(KERN_INFO "Unknown OMAP cpu type: 0x%02x\n", cpu_type);
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100195 }
196
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800197 printk(KERN_INFO "OMAP%04x", omap_revision >> 16);
198 if ((omap_revision >> 8) & 0xff)
199 printk(KERN_INFO "%x", (omap_revision >> 8) & 0xff);
200 printk(KERN_INFO " revision %i handled as %02xxx id: %08x%08x\n",
201 die_rev, omap_revision & 0xff, system_serial_low,
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100202 system_serial_high);
203}
204