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/config.h>
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/init.h>
22 u16 jtag_id; /* Used to determine OMAP type */
23 u8 die_rev; /* Processor revision */
24 u32 omap_id; /* OMAP revision */
25 u32 type; /* Cpu id bits [31:08], cpu class bits [07:00] */
28 /* Register values to detect the OMAP version */
29 static struct omap_id omap_ids[] __initdata = {
30 { .jtag_id = 0x355f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300100},
31 { .jtag_id = 0xb55f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300300},
32 { .jtag_id = 0xb470, .die_rev = 0x0, .omap_id = 0x03310100, .type = 0x15100000},
33 { .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x16100000},
34 { .jtag_id = 0xb576, .die_rev = 0x2, .omap_id = 0x03320100, .type = 0x16110000},
35 { .jtag_id = 0xb576, .die_rev = 0x3, .omap_id = 0x03320100, .type = 0x16100c00},
36 { .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320200, .type = 0x16100d00},
37 { .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
38 { .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
39 { .jtag_id = 0xb576, .die_rev = 0x1, .omap_id = 0x03320100, .type = 0x16110000},
40 { .jtag_id = 0xb58c, .die_rev = 0x2, .omap_id = 0x03320200, .type = 0x16110b00},
41 { .jtag_id = 0xb58c, .die_rev = 0x3, .omap_id = 0x03320200, .type = 0x16110c00},
42 { .jtag_id = 0xb65f, .die_rev = 0x0, .omap_id = 0x03320400, .type = 0x16212300},
43 { .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320400, .type = 0x16212300},
44 { .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x16212300},
45 { .jtag_id = 0xb5f7, .die_rev = 0x0, .omap_id = 0x03330000, .type = 0x17100000},
46 { .jtag_id = 0xb5f7, .die_rev = 0x1, .omap_id = 0x03330100, .type = 0x17100000},
47 { .jtag_id = 0xb5f7, .die_rev = 0x2, .omap_id = 0x03330100, .type = 0x17100000},
51 * Get OMAP type from PROD_ID.
52 * 1710 has the PROD_ID in bits 15:00, not in 16:01 as documented in TRM.
53 * 1510 PROD_ID is empty, and 1610 PROD_ID does not make sense.
54 * Undocumented register in TEST BLOCK is used as fallback; This seems to
55 * work on 1510, 1610 & 1710. The official way hopefully will work in future
58 static u16 __init omap_get_jtag_id(void)
62 prod_id = omap_readl(OMAP_PRODUCTION_ID_1);
63 omap_id = omap_readl(OMAP32_ID_1);
65 /* Check for unusable OMAP_PRODUCTION_ID_1 on 1611B/5912 and 730 */
66 if (((prod_id >> 20) == 0) || (prod_id == omap_id))
74 /* Use OMAP32_ID_1 as fallback */
75 prod_id = ((omap_id >> 12) & 0xffff);
81 * Get OMAP revision from DIE_REV.
82 * Early 1710 processors may have broken OMAP_DIE_ID, it contains PROD_ID.
83 * Undocumented register in the TEST BLOCK is used as fallback.
84 * REVISIT: This does not seem to work on 1510
86 static u8 __init omap_get_die_rev(void)
90 die_rev = omap_readl(OMAP_DIE_ID_1);
92 /* Check for broken OMAP_DIE_ID on early 1710 */
93 if (((die_rev >> 12) & 0xffff) == omap_get_jtag_id())
96 die_rev = (die_rev >> 17) & 0xf;
100 die_rev = (omap_readl(OMAP32_ID_1) >> 28) & 0xf;
105 void __init omap_check_revision(void)
113 jtag_id = omap_get_jtag_id();
114 die_rev = omap_get_die_rev();
115 omap_id = omap_readl(OMAP32_ID_0);
118 printk("OMAP_DIE_ID_0: 0x%08x\n", omap_readl(OMAP_DIE_ID_0));
119 printk("OMAP_DIE_ID_1: 0x%08x DIE_REV: %i\n",
120 omap_readl(OMAP_DIE_ID_1),
121 (omap_readl(OMAP_DIE_ID_1) >> 17) & 0xf);
122 printk("OMAP_PRODUCTION_ID_0: 0x%08x\n", omap_readl(OMAP_PRODUCTION_ID_0));
123 printk("OMAP_PRODUCTION_ID_1: 0x%08x JTAG_ID: 0x%04x\n",
124 omap_readl(OMAP_PRODUCTION_ID_1),
125 omap_readl(OMAP_PRODUCTION_ID_1) & 0xffff);
126 printk("OMAP32_ID_0: 0x%08x\n", omap_readl(OMAP32_ID_0));
127 printk("OMAP32_ID_1: 0x%08x\n", omap_readl(OMAP32_ID_1));
128 printk("JTAG_ID: 0x%04x DIE_REV: %i\n", jtag_id, die_rev);
131 system_serial_high = omap_readl(OMAP_DIE_ID_0);
132 system_serial_low = omap_readl(OMAP_DIE_ID_1);
134 /* First check only the major version in a safe way */
135 for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
136 if (jtag_id == (omap_ids[i].jtag_id)) {
137 system_rev = omap_ids[i].type;
142 /* Check if we can find the die revision */
143 for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
144 if (jtag_id == omap_ids[i].jtag_id && die_rev == omap_ids[i].die_rev) {
145 system_rev = omap_ids[i].type;
150 /* Finally check also the omap_id */
151 for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
152 if (jtag_id == omap_ids[i].jtag_id
153 && die_rev == omap_ids[i].die_rev
154 && omap_id == omap_ids[i].omap_id) {
155 system_rev = omap_ids[i].type;
160 /* Add the cpu class info (7xx, 15xx, 16xx, 24xx) */
161 cpu_type = system_rev >> 24;
178 printk("Unknown OMAP cpu type: 0x%02x\n", cpu_type);
181 printk("OMAP%04x", system_rev >> 16);
182 if ((system_rev >> 8) & 0xff)
183 printk("%x", (system_rev >> 8) & 0xff);
184 printk(" revision %i handled as %02xxx id: %08x%08x\n",
185 die_rev, system_rev & 0xff, system_serial_low,