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>
20 #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
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] */
34 static unsigned int omap_revision;
36 /* Register values to detect the OMAP version */
37 static struct omap_id omap_ids[] __initdata = {
38 { .jtag_id = 0xb574, .die_rev = 0x2, .omap_id = 0x03310315, .type = 0x03100000},
39 { .jtag_id = 0x355f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300100},
40 { .jtag_id = 0xb55f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300300},
41 { .jtag_id = 0xb470, .die_rev = 0x0, .omap_id = 0x03310100, .type = 0x15100000},
42 { .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x16100000},
43 { .jtag_id = 0xb576, .die_rev = 0x2, .omap_id = 0x03320100, .type = 0x16110000},
44 { .jtag_id = 0xb576, .die_rev = 0x3, .omap_id = 0x03320100, .type = 0x16100c00},
45 { .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320200, .type = 0x16100d00},
46 { .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
47 { .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
48 { .jtag_id = 0xb576, .die_rev = 0x1, .omap_id = 0x03320100, .type = 0x16110000},
49 { .jtag_id = 0xb58c, .die_rev = 0x2, .omap_id = 0x03320200, .type = 0x16110b00},
50 { .jtag_id = 0xb58c, .die_rev = 0x3, .omap_id = 0x03320200, .type = 0x16110c00},
51 { .jtag_id = 0xb65f, .die_rev = 0x0, .omap_id = 0x03320400, .type = 0x16212300},
52 { .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320400, .type = 0x16212300},
53 { .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x16212300},
54 { .jtag_id = 0xb5f7, .die_rev = 0x0, .omap_id = 0x03330000, .type = 0x17100000},
55 { .jtag_id = 0xb5f7, .die_rev = 0x1, .omap_id = 0x03330100, .type = 0x17100000},
56 { .jtag_id = 0xb5f7, .die_rev = 0x2, .omap_id = 0x03330100, .type = 0x17100000},
59 unsigned int omap_rev(void)
63 EXPORT_SYMBOL(omap_rev);
66 * Get OMAP type from PROD_ID.
67 * 1710 has the PROD_ID in bits 15:00, not in 16:01 as documented in TRM.
68 * 1510 PROD_ID is empty, and 1610 PROD_ID does not make sense.
69 * Undocumented register in TEST BLOCK is used as fallback; This seems to
70 * work on 1510, 1610 & 1710. The official way hopefully will work in future
73 static u16 __init omap_get_jtag_id(void)
77 prod_id = omap_readl(OMAP_PRODUCTION_ID_1);
78 omap_id = omap_readl(OMAP32_ID_1);
80 /* Check for unusable OMAP_PRODUCTION_ID_1 on 1611B/5912 and 730 */
81 if (((prod_id >> 20) == 0) || (prod_id == omap_id))
89 /* Use OMAP32_ID_1 as fallback */
90 prod_id = ((omap_id >> 12) & 0xffff);
96 * Get OMAP revision from DIE_REV.
97 * Early 1710 processors may have broken OMAP_DIE_ID, it contains PROD_ID.
98 * Undocumented register in the TEST BLOCK is used as fallback.
99 * REVISIT: This does not seem to work on 1510
101 static u8 __init omap_get_die_rev(void)
105 die_rev = omap_readl(OMAP_DIE_ID_1);
107 /* Check for broken OMAP_DIE_ID on early 1710 */
108 if (((die_rev >> 12) & 0xffff) == omap_get_jtag_id())
111 die_rev = (die_rev >> 17) & 0xf;
115 die_rev = (omap_readl(OMAP32_ID_1) >> 28) & 0xf;
120 void __init omap_check_revision(void)
128 jtag_id = omap_get_jtag_id();
129 die_rev = omap_get_die_rev();
130 omap_id = omap_readl(OMAP32_ID_0);
133 printk(KERN_DEBUG "OMAP_DIE_ID_0: 0x%08x\n", omap_readl(OMAP_DIE_ID_0));
134 printk(KERN_DEBUG "OMAP_DIE_ID_1: 0x%08x DIE_REV: %i\n",
135 omap_readl(OMAP_DIE_ID_1),
136 (omap_readl(OMAP_DIE_ID_1) >> 17) & 0xf);
137 printk(KERN_DEBUG "OMAP_PRODUCTION_ID_0: 0x%08x\n",
138 omap_readl(OMAP_PRODUCTION_ID_0));
139 printk(KERN_DEBUG "OMAP_PRODUCTION_ID_1: 0x%08x JTAG_ID: 0x%04x\n",
140 omap_readl(OMAP_PRODUCTION_ID_1),
141 omap_readl(OMAP_PRODUCTION_ID_1) & 0xffff);
142 printk(KERN_DEBUG "OMAP32_ID_0: 0x%08x\n", omap_readl(OMAP32_ID_0));
143 printk(KERN_DEBUG "OMAP32_ID_1: 0x%08x\n", omap_readl(OMAP32_ID_1));
144 printk(KERN_DEBUG "JTAG_ID: 0x%04x DIE_REV: %i\n", jtag_id, die_rev);
147 system_serial_high = omap_readl(OMAP_DIE_ID_0);
148 system_serial_low = omap_readl(OMAP_DIE_ID_1);
150 /* First check only the major version in a safe way */
151 for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
152 if (jtag_id == (omap_ids[i].jtag_id)) {
153 omap_revision = omap_ids[i].type;
158 /* Check if we can find the die revision */
159 for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
160 if (jtag_id == omap_ids[i].jtag_id && die_rev == omap_ids[i].die_rev) {
161 omap_revision = omap_ids[i].type;
166 /* Finally check also the omap_id */
167 for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
168 if (jtag_id == omap_ids[i].jtag_id
169 && die_rev == omap_ids[i].die_rev
170 && omap_id == omap_ids[i].omap_id) {
171 omap_revision = omap_ids[i].type;
176 /* Add the cpu class info (7xx, 15xx, 16xx, 24xx) */
177 cpu_type = omap_revision >> 24;
181 omap_revision |= 0x07;
185 omap_revision |= 0x15;
189 omap_revision |= 0x16;
192 printk(KERN_INFO "Unknown OMAP cpu type: 0x%02x\n", cpu_type);
195 printk(KERN_INFO "OMAP%04x", omap_revision >> 16);
196 if ((omap_revision >> 8) & 0xff)
197 printk(KERN_INFO "%x", (omap_revision >> 8) & 0xff);
198 printk(KERN_INFO " revision %i handled as %02xxx id: %08x%08x\n",
199 die_rev, omap_revision & 0xff, system_serial_low,