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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 Lindgren2e3ee9f2012-02-24 10:34:34 -080018
Tony Lindgrence491cf2009-10-20 09:40:47 -070019#include <plat/cpu.h>
Tony Lindgrenf577ffd2005-07-10 19:58:12 +010020
Tony Lindgren3179a012005-11-10 14:26:48 +000021#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
27
Tony Lindgrenf577ffd2005-07-10 19:58:12 +010028struct omap_id {
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] */
33};
34
Lauri Leukkunen84a34342008-12-10 17:36:31 -080035static unsigned int omap_revision;
36
Tony Lindgrenf577ffd2005-07-10 19:58:12 +010037/* Register values to detect the OMAP version */
38static struct omap_id omap_ids[] __initdata = {
Tony Lindgren3179a012005-11-10 14:26:48 +000039 { .jtag_id = 0xb574, .die_rev = 0x2, .omap_id = 0x03310315, .type = 0x03100000},
Tony Lindgrenf577ffd2005-07-10 19:58:12 +010040 { .jtag_id = 0x355f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300100},
41 { .jtag_id = 0xb55f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300300},
Angelo Arrifanof5ee2fc2009-09-24 16:23:13 -070042 { .jtag_id = 0xb62c, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x08500000},
Tony Lindgrenf577ffd2005-07-10 19:58:12 +010043 { .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},
59};
60
Lauri Leukkunen84a34342008-12-10 17:36:31 -080061unsigned int omap_rev(void)
62{
63 return omap_revision;
64}
65EXPORT_SYMBOL(omap_rev);
66
Tony Lindgrenf577ffd2005-07-10 19:58:12 +010067/*
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
73 * processors.
74 */
75static u16 __init omap_get_jtag_id(void)
76{
77 u32 prod_id, omap_id;
78
79 prod_id = omap_readl(OMAP_PRODUCTION_ID_1);
80 omap_id = omap_readl(OMAP32_ID_1);
81
Zebediah C. McClureae302f42009-03-23 18:07:39 -070082 /* Check for unusable OMAP_PRODUCTION_ID_1 on 1611B/5912 and 730/850 */
Tony Lindgrenf577ffd2005-07-10 19:58:12 +010083 if (((prod_id >> 20) == 0) || (prod_id == omap_id))
84 prod_id = 0;
85 else
86 prod_id &= 0xffff;
87
88 if (prod_id)
89 return prod_id;
90
91 /* Use OMAP32_ID_1 as fallback */
92 prod_id = ((omap_id >> 12) & 0xffff);
93
94 return prod_id;
95}
96
97/*
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
102 */
103static u8 __init omap_get_die_rev(void)
104{
105 u32 die_rev;
106
107 die_rev = omap_readl(OMAP_DIE_ID_1);
108
109 /* Check for broken OMAP_DIE_ID on early 1710 */
110 if (((die_rev >> 12) & 0xffff) == omap_get_jtag_id())
111 die_rev = 0;
112
113 die_rev = (die_rev >> 17) & 0xf;
114 if (die_rev)
115 return die_rev;
116
117 die_rev = (omap_readl(OMAP32_ID_1) >> 28) & 0xf;
118
119 return die_rev;
120}
121
122void __init omap_check_revision(void)
123{
124 int i;
125 u16 jtag_id;
126 u8 die_rev;
127 u32 omap_id;
128 u8 cpu_type;
129
130 jtag_id = omap_get_jtag_id();
131 die_rev = omap_get_die_rev();
132 omap_id = omap_readl(OMAP32_ID_0);
133
134#ifdef DEBUG
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800135 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",
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100137 omap_readl(OMAP_DIE_ID_1),
138 (omap_readl(OMAP_DIE_ID_1) >> 17) & 0xf);
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800139 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",
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100142 omap_readl(OMAP_PRODUCTION_ID_1),
143 omap_readl(OMAP_PRODUCTION_ID_1) & 0xffff);
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800144 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);
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100147#endif
148
149 system_serial_high = omap_readl(OMAP_DIE_ID_0);
150 system_serial_low = omap_readl(OMAP_DIE_ID_1);
151
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)) {
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800155 omap_revision = omap_ids[i].type;
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100156 break;
157 }
158 }
159
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) {
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800163 omap_revision = omap_ids[i].type;
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100164 break;
165 }
166 }
167
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) {
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800173 omap_revision = omap_ids[i].type;
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100174 break;
175 }
176 }
177
178 /* Add the cpu class info (7xx, 15xx, 16xx, 24xx) */
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800179 cpu_type = omap_revision >> 24;
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100180
181 switch (cpu_type) {
182 case 0x07:
Zebediah C. McClureae302f42009-03-23 18:07:39 -0700183 case 0x08:
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800184 omap_revision |= 0x07;
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100185 break;
Tony Lindgren3179a012005-11-10 14:26:48 +0000186 case 0x03:
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100187 case 0x15:
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800188 omap_revision |= 0x15;
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100189 break;
190 case 0x16:
191 case 0x17:
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800192 omap_revision |= 0x16;
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100193 break;
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100194 default:
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800195 printk(KERN_INFO "Unknown OMAP cpu type: 0x%02x\n", cpu_type);
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100196 }
197
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800198 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,
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100203 system_serial_high);
204}
205