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>
22 #include <mach/hardware.h>
26 #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
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] */
40 static unsigned int omap_revision;
42 /* Register values to detect the OMAP version */
43 static struct omap_id omap_ids[] __initdata = {
44 { .jtag_id = 0xb574, .die_rev = 0x2, .omap_id = 0x03310315, .type = 0x03100000},
45 { .jtag_id = 0x355f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300100},
46 { .jtag_id = 0xb55f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300300},
47 { .jtag_id = 0xb62c, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x08500000},
48 { .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},
66 unsigned int omap_rev(void)
70 EXPORT_SYMBOL(omap_rev);
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
80 static u16 __init omap_get_jtag_id(void)
84 prod_id = omap_readl(OMAP_PRODUCTION_ID_1);
85 omap_id = omap_readl(OMAP32_ID_1);
87 /* Check for unusable OMAP_PRODUCTION_ID_1 on 1611B/5912 and 730/850 */
88 if (((prod_id >> 20) == 0) || (prod_id == omap_id))
96 /* Use OMAP32_ID_1 as fallback */
97 prod_id = ((omap_id >> 12) & 0xffff);
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
108 static u8 __init omap_get_die_rev(void)
112 die_rev = omap_readl(OMAP_DIE_ID_1);
114 /* Check for broken OMAP_DIE_ID on early 1710 */
115 if (((die_rev >> 12) & 0xffff) == omap_get_jtag_id())
118 die_rev = (die_rev >> 17) & 0xf;
122 die_rev = (omap_readl(OMAP32_ID_1) >> 28) & 0xf;
127 void __init omap_check_revision(void)
135 jtag_id = omap_get_jtag_id();
136 die_rev = omap_get_die_rev();
137 omap_id = omap_readl(OMAP32_ID_0);
140 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",
142 omap_readl(OMAP_DIE_ID_1),
143 (omap_readl(OMAP_DIE_ID_1) >> 17) & 0xf);
144 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",
147 omap_readl(OMAP_PRODUCTION_ID_1),
148 omap_readl(OMAP_PRODUCTION_ID_1) & 0xffff);
149 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);
154 system_serial_high = omap_readl(OMAP_DIE_ID_0);
155 system_serial_low = omap_readl(OMAP_DIE_ID_1);
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)) {
160 omap_revision = omap_ids[i].type;
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) {
168 omap_revision = omap_ids[i].type;
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) {
178 omap_revision = omap_ids[i].type;
183 /* Add the cpu class info (7xx, 15xx, 16xx, 24xx) */
184 cpu_type = omap_revision >> 24;
189 omap_revision |= 0x07;
193 omap_revision |= 0x15;
197 omap_revision |= 0x16;
200 printk(KERN_INFO "Unknown OMAP cpu type: 0x%02x\n", cpu_type);
203 pr_info("OMAP%04x", omap_revision >> 16);
204 if ((omap_revision >> 8) & 0xff)
205 pr_cont("%x", (omap_revision >> 8) & 0xff);
206 pr_cont(" revision %i handled as %02xxx id: %08x%08x\n",
207 die_rev, omap_revision & 0xff, system_serial_low,