ia64/kvm: compilation fix. export account_system_vtime.
[pv_ops_mirror.git] / arch / arm / mach-omap1 / id.c
blobda13c3e82850e46e274a78acc4e0d3aed803ddc1
1 /*
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/io.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
27 struct omap_id {
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 /* Register values to detect the OMAP version */
35 static struct omap_id omap_ids[] __initdata = {
36 { .jtag_id = 0xb574, .die_rev = 0x2, .omap_id = 0x03310315, .type = 0x03100000},
37 { .jtag_id = 0x355f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300100},
38 { .jtag_id = 0xb55f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300300},
39 { .jtag_id = 0xb470, .die_rev = 0x0, .omap_id = 0x03310100, .type = 0x15100000},
40 { .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x16100000},
41 { .jtag_id = 0xb576, .die_rev = 0x2, .omap_id = 0x03320100, .type = 0x16110000},
42 { .jtag_id = 0xb576, .die_rev = 0x3, .omap_id = 0x03320100, .type = 0x16100c00},
43 { .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320200, .type = 0x16100d00},
44 { .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
45 { .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
46 { .jtag_id = 0xb576, .die_rev = 0x1, .omap_id = 0x03320100, .type = 0x16110000},
47 { .jtag_id = 0xb58c, .die_rev = 0x2, .omap_id = 0x03320200, .type = 0x16110b00},
48 { .jtag_id = 0xb58c, .die_rev = 0x3, .omap_id = 0x03320200, .type = 0x16110c00},
49 { .jtag_id = 0xb65f, .die_rev = 0x0, .omap_id = 0x03320400, .type = 0x16212300},
50 { .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320400, .type = 0x16212300},
51 { .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x16212300},
52 { .jtag_id = 0xb5f7, .die_rev = 0x0, .omap_id = 0x03330000, .type = 0x17100000},
53 { .jtag_id = 0xb5f7, .die_rev = 0x1, .omap_id = 0x03330100, .type = 0x17100000},
54 { .jtag_id = 0xb5f7, .die_rev = 0x2, .omap_id = 0x03330100, .type = 0x17100000},
58 * Get OMAP type from PROD_ID.
59 * 1710 has the PROD_ID in bits 15:00, not in 16:01 as documented in TRM.
60 * 1510 PROD_ID is empty, and 1610 PROD_ID does not make sense.
61 * Undocumented register in TEST BLOCK is used as fallback; This seems to
62 * work on 1510, 1610 & 1710. The official way hopefully will work in future
63 * processors.
65 static u16 __init omap_get_jtag_id(void)
67 u32 prod_id, omap_id;
69 prod_id = omap_readl(OMAP_PRODUCTION_ID_1);
70 omap_id = omap_readl(OMAP32_ID_1);
72 /* Check for unusable OMAP_PRODUCTION_ID_1 on 1611B/5912 and 730 */
73 if (((prod_id >> 20) == 0) || (prod_id == omap_id))
74 prod_id = 0;
75 else
76 prod_id &= 0xffff;
78 if (prod_id)
79 return prod_id;
81 /* Use OMAP32_ID_1 as fallback */
82 prod_id = ((omap_id >> 12) & 0xffff);
84 return prod_id;
88 * Get OMAP revision from DIE_REV.
89 * Early 1710 processors may have broken OMAP_DIE_ID, it contains PROD_ID.
90 * Undocumented register in the TEST BLOCK is used as fallback.
91 * REVISIT: This does not seem to work on 1510
93 static u8 __init omap_get_die_rev(void)
95 u32 die_rev;
97 die_rev = omap_readl(OMAP_DIE_ID_1);
99 /* Check for broken OMAP_DIE_ID on early 1710 */
100 if (((die_rev >> 12) & 0xffff) == omap_get_jtag_id())
101 die_rev = 0;
103 die_rev = (die_rev >> 17) & 0xf;
104 if (die_rev)
105 return die_rev;
107 die_rev = (omap_readl(OMAP32_ID_1) >> 28) & 0xf;
109 return die_rev;
112 void __init omap_check_revision(void)
114 int i;
115 u16 jtag_id;
116 u8 die_rev;
117 u32 omap_id;
118 u8 cpu_type;
120 jtag_id = omap_get_jtag_id();
121 die_rev = omap_get_die_rev();
122 omap_id = omap_readl(OMAP32_ID_0);
124 #ifdef DEBUG
125 printk("OMAP_DIE_ID_0: 0x%08x\n", omap_readl(OMAP_DIE_ID_0));
126 printk("OMAP_DIE_ID_1: 0x%08x DIE_REV: %i\n",
127 omap_readl(OMAP_DIE_ID_1),
128 (omap_readl(OMAP_DIE_ID_1) >> 17) & 0xf);
129 printk("OMAP_PRODUCTION_ID_0: 0x%08x\n", omap_readl(OMAP_PRODUCTION_ID_0));
130 printk("OMAP_PRODUCTION_ID_1: 0x%08x JTAG_ID: 0x%04x\n",
131 omap_readl(OMAP_PRODUCTION_ID_1),
132 omap_readl(OMAP_PRODUCTION_ID_1) & 0xffff);
133 printk("OMAP32_ID_0: 0x%08x\n", omap_readl(OMAP32_ID_0));
134 printk("OMAP32_ID_1: 0x%08x\n", omap_readl(OMAP32_ID_1));
135 printk("JTAG_ID: 0x%04x DIE_REV: %i\n", jtag_id, die_rev);
136 #endif
138 system_serial_high = omap_readl(OMAP_DIE_ID_0);
139 system_serial_low = omap_readl(OMAP_DIE_ID_1);
141 /* First check only the major version in a safe way */
142 for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
143 if (jtag_id == (omap_ids[i].jtag_id)) {
144 system_rev = omap_ids[i].type;
145 break;
149 /* Check if we can find the die revision */
150 for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
151 if (jtag_id == omap_ids[i].jtag_id && die_rev == omap_ids[i].die_rev) {
152 system_rev = omap_ids[i].type;
153 break;
157 /* Finally check also the omap_id */
158 for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
159 if (jtag_id == omap_ids[i].jtag_id
160 && die_rev == omap_ids[i].die_rev
161 && omap_id == omap_ids[i].omap_id) {
162 system_rev = omap_ids[i].type;
163 break;
167 /* Add the cpu class info (7xx, 15xx, 16xx, 24xx) */
168 cpu_type = system_rev >> 24;
170 switch (cpu_type) {
171 case 0x07:
172 system_rev |= 0x07;
173 break;
174 case 0x03:
175 case 0x15:
176 system_rev |= 0x15;
177 break;
178 case 0x16:
179 case 0x17:
180 system_rev |= 0x16;
181 break;
182 case 0x24:
183 system_rev |= 0x24;
184 break;
185 default:
186 printk("Unknown OMAP cpu type: 0x%02x\n", cpu_type);
189 printk("OMAP%04x", system_rev >> 16);
190 if ((system_rev >> 8) & 0xff)
191 printk("%x", (system_rev >> 8) & 0xff);
192 printk(" revision %i handled as %02xxx id: %08x%08x\n",
193 die_rev, system_rev & 0xff, system_serial_low,
194 system_serial_high);