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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>
David Howells9f97da72012-03-28 18:30:01 +010018#include <asm/system_info.h>
Tony Lindgren2e3ee9f2012-02-24 10:34:34 -080019
Tony Lindgrene4c060d2012-10-05 13:25:59 -070020#include "soc.h"
Tony Lindgrenf577ffd2005-07-10 19:58:12 +010021
Tony Lindgren2c799ce2012-02-24 10:34:35 -080022#include <mach/hardware.h>
23
Paul Walmsleye2ed89f2012-04-13 06:34:26 -060024#include "common.h"
25
Tony Lindgren3179a012005-11-10 14:26:48 +000026#define OMAP_DIE_ID_0 0xfffe1800
27#define OMAP_DIE_ID_1 0xfffe1804
28#define OMAP_PRODUCTION_ID_0 0xfffe2000
29#define OMAP_PRODUCTION_ID_1 0xfffe2004
30#define OMAP32_ID_0 0xfffed400
31#define OMAP32_ID_1 0xfffed404
32
Tony Lindgrenf577ffd2005-07-10 19:58:12 +010033struct omap_id {
34 u16 jtag_id; /* Used to determine OMAP type */
35 u8 die_rev; /* Processor revision */
36 u32 omap_id; /* OMAP revision */
37 u32 type; /* Cpu id bits [31:08], cpu class bits [07:00] */
38};
39
Lauri Leukkunen84a34342008-12-10 17:36:31 -080040static unsigned int omap_revision;
41
Tony Lindgrenf577ffd2005-07-10 19:58:12 +010042/* Register values to detect the OMAP version */
43static struct omap_id omap_ids[] __initdata = {
Tony Lindgren3179a012005-11-10 14:26:48 +000044 { .jtag_id = 0xb574, .die_rev = 0x2, .omap_id = 0x03310315, .type = 0x03100000},
Tony Lindgrenf577ffd2005-07-10 19:58:12 +010045 { .jtag_id = 0x355f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300100},
46 { .jtag_id = 0xb55f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300300},
Angelo Arrifanof5ee2fc2009-09-24 16:23:13 -070047 { .jtag_id = 0xb62c, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x08500000},
Tony Lindgrenf577ffd2005-07-10 19:58:12 +010048 { .jtag_id = 0xb470, .die_rev = 0x0, .omap_id = 0x03310100, .type = 0x15100000},
49 { .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x16100000},
50 { .jtag_id = 0xb576, .die_rev = 0x2, .omap_id = 0x03320100, .type = 0x16110000},
51 { .jtag_id = 0xb576, .die_rev = 0x3, .omap_id = 0x03320100, .type = 0x16100c00},
52 { .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320200, .type = 0x16100d00},
53 { .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
54 { .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
55 { .jtag_id = 0xb576, .die_rev = 0x1, .omap_id = 0x03320100, .type = 0x16110000},
56 { .jtag_id = 0xb58c, .die_rev = 0x2, .omap_id = 0x03320200, .type = 0x16110b00},
57 { .jtag_id = 0xb58c, .die_rev = 0x3, .omap_id = 0x03320200, .type = 0x16110c00},
58 { .jtag_id = 0xb65f, .die_rev = 0x0, .omap_id = 0x03320400, .type = 0x16212300},
59 { .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320400, .type = 0x16212300},
60 { .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x16212300},
61 { .jtag_id = 0xb5f7, .die_rev = 0x0, .omap_id = 0x03330000, .type = 0x17100000},
62 { .jtag_id = 0xb5f7, .die_rev = 0x1, .omap_id = 0x03330100, .type = 0x17100000},
63 { .jtag_id = 0xb5f7, .die_rev = 0x2, .omap_id = 0x03330100, .type = 0x17100000},
64};
65
Lauri Leukkunen84a34342008-12-10 17:36:31 -080066unsigned int omap_rev(void)
67{
68 return omap_revision;
69}
70EXPORT_SYMBOL(omap_rev);
71
Tony Lindgrenf577ffd2005-07-10 19:58:12 +010072/*
73 * Get OMAP type from PROD_ID.
74 * 1710 has the PROD_ID in bits 15:00, not in 16:01 as documented in TRM.
75 * 1510 PROD_ID is empty, and 1610 PROD_ID does not make sense.
76 * Undocumented register in TEST BLOCK is used as fallback; This seems to
77 * work on 1510, 1610 & 1710. The official way hopefully will work in future
78 * processors.
79 */
80static u16 __init omap_get_jtag_id(void)
81{
82 u32 prod_id, omap_id;
83
84 prod_id = omap_readl(OMAP_PRODUCTION_ID_1);
85 omap_id = omap_readl(OMAP32_ID_1);
86
Zebediah C. McClureae302f42009-03-23 18:07:39 -070087 /* Check for unusable OMAP_PRODUCTION_ID_1 on 1611B/5912 and 730/850 */
Tony Lindgrenf577ffd2005-07-10 19:58:12 +010088 if (((prod_id >> 20) == 0) || (prod_id == omap_id))
89 prod_id = 0;
90 else
91 prod_id &= 0xffff;
92
93 if (prod_id)
94 return prod_id;
95
96 /* Use OMAP32_ID_1 as fallback */
97 prod_id = ((omap_id >> 12) & 0xffff);
98
99 return prod_id;
100}
101
102/*
103 * Get OMAP revision from DIE_REV.
104 * Early 1710 processors may have broken OMAP_DIE_ID, it contains PROD_ID.
105 * Undocumented register in the TEST BLOCK is used as fallback.
106 * REVISIT: This does not seem to work on 1510
107 */
108static u8 __init omap_get_die_rev(void)
109{
110 u32 die_rev;
111
112 die_rev = omap_readl(OMAP_DIE_ID_1);
113
114 /* Check for broken OMAP_DIE_ID on early 1710 */
115 if (((die_rev >> 12) & 0xffff) == omap_get_jtag_id())
116 die_rev = 0;
117
118 die_rev = (die_rev >> 17) & 0xf;
119 if (die_rev)
120 return die_rev;
121
122 die_rev = (omap_readl(OMAP32_ID_1) >> 28) & 0xf;
123
124 return die_rev;
125}
126
127void __init omap_check_revision(void)
128{
129 int i;
130 u16 jtag_id;
131 u8 die_rev;
132 u32 omap_id;
133 u8 cpu_type;
134
135 jtag_id = omap_get_jtag_id();
136 die_rev = omap_get_die_rev();
137 omap_id = omap_readl(OMAP32_ID_0);
138
139#ifdef DEBUG
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800140 printk(KERN_DEBUG "OMAP_DIE_ID_0: 0x%08x\n", omap_readl(OMAP_DIE_ID_0));
141 printk(KERN_DEBUG "OMAP_DIE_ID_1: 0x%08x DIE_REV: %i\n",
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100142 omap_readl(OMAP_DIE_ID_1),
143 (omap_readl(OMAP_DIE_ID_1) >> 17) & 0xf);
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800144 printk(KERN_DEBUG "OMAP_PRODUCTION_ID_0: 0x%08x\n",
145 omap_readl(OMAP_PRODUCTION_ID_0));
146 printk(KERN_DEBUG "OMAP_PRODUCTION_ID_1: 0x%08x JTAG_ID: 0x%04x\n",
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100147 omap_readl(OMAP_PRODUCTION_ID_1),
148 omap_readl(OMAP_PRODUCTION_ID_1) & 0xffff);
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800149 printk(KERN_DEBUG "OMAP32_ID_0: 0x%08x\n", omap_readl(OMAP32_ID_0));
150 printk(KERN_DEBUG "OMAP32_ID_1: 0x%08x\n", omap_readl(OMAP32_ID_1));
151 printk(KERN_DEBUG "JTAG_ID: 0x%04x DIE_REV: %i\n", jtag_id, die_rev);
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100152#endif
153
154 system_serial_high = omap_readl(OMAP_DIE_ID_0);
155 system_serial_low = omap_readl(OMAP_DIE_ID_1);
156
157 /* First check only the major version in a safe way */
158 for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
159 if (jtag_id == (omap_ids[i].jtag_id)) {
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800160 omap_revision = omap_ids[i].type;
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100161 break;
162 }
163 }
164
165 /* Check if we can find the die revision */
166 for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
167 if (jtag_id == omap_ids[i].jtag_id && die_rev == omap_ids[i].die_rev) {
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800168 omap_revision = omap_ids[i].type;
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100169 break;
170 }
171 }
172
173 /* Finally check also the omap_id */
174 for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
175 if (jtag_id == omap_ids[i].jtag_id
176 && die_rev == omap_ids[i].die_rev
177 && omap_id == omap_ids[i].omap_id) {
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800178 omap_revision = omap_ids[i].type;
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100179 break;
180 }
181 }
182
183 /* Add the cpu class info (7xx, 15xx, 16xx, 24xx) */
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800184 cpu_type = omap_revision >> 24;
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100185
186 switch (cpu_type) {
187 case 0x07:
Zebediah C. McClureae302f42009-03-23 18:07:39 -0700188 case 0x08:
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800189 omap_revision |= 0x07;
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100190 break;
Tony Lindgren3179a012005-11-10 14:26:48 +0000191 case 0x03:
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100192 case 0x15:
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800193 omap_revision |= 0x15;
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100194 break;
195 case 0x16:
196 case 0x17:
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800197 omap_revision |= 0x16;
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100198 break;
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100199 default:
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800200 printk(KERN_INFO "Unknown OMAP cpu type: 0x%02x\n", cpu_type);
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100201 }
202
Lauri Leukkunen84a34342008-12-10 17:36:31 -0800203 printk(KERN_INFO "OMAP%04x", omap_revision >> 16);
204 if ((omap_revision >> 8) & 0xff)
205 printk(KERN_INFO "%x", (omap_revision >> 8) & 0xff);
206 printk(KERN_INFO " revision %i handled as %02xxx id: %08x%08x\n",
207 die_rev, omap_revision & 0xff, system_serial_low,
Tony Lindgrenf577ffd2005-07-10 19:58:12 +0100208 system_serial_high);
209}
210