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f577ffd7 TL |
1 | /* |
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 | ||
f577ffd7 TL |
14 | #include <linux/module.h> |
15 | #include <linux/kernel.h> | |
16 | #include <linux/init.h> | |
fced80c7 | 17 | #include <linux/io.h> |
ce491cf8 | 18 | #include <plat/cpu.h> |
f577ffd7 | 19 | |
3179a019 TL |
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 | |
26 | ||
f577ffd7 TL |
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] */ | |
32 | }; | |
33 | ||
84a34344 LL |
34 | static unsigned int omap_revision; |
35 | ||
f577ffd7 TL |
36 | /* Register values to detect the OMAP version */ |
37 | static struct omap_id omap_ids[] __initdata = { | |
3179a019 | 38 | { .jtag_id = 0xb574, .die_rev = 0x2, .omap_id = 0x03310315, .type = 0x03100000}, |
f577ffd7 TL |
39 | { .jtag_id = 0x355f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300100}, |
40 | { .jtag_id = 0xb55f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300300}, | |
f5ee2fc7 | 41 | { .jtag_id = 0xb62c, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x08500000}, |
f577ffd7 TL |
42 | { .jtag_id = 0xb470, .die_rev = 0x0, .omap_id = 0x03310100, .type = 0x15100000}, |
43 | { .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x16100000}, | |
44 | { .jtag_id = 0xb576, .die_rev = 0x2, .omap_id = 0x03320100, .type = 0x16110000}, | |
45 | { .jtag_id = 0xb576, .die_rev = 0x3, .omap_id = 0x03320100, .type = 0x16100c00}, | |
46 | { .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320200, .type = 0x16100d00}, | |
47 | { .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00}, | |
48 | { .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00}, | |
49 | { .jtag_id = 0xb576, .die_rev = 0x1, .omap_id = 0x03320100, .type = 0x16110000}, | |
50 | { .jtag_id = 0xb58c, .die_rev = 0x2, .omap_id = 0x03320200, .type = 0x16110b00}, | |
51 | { .jtag_id = 0xb58c, .die_rev = 0x3, .omap_id = 0x03320200, .type = 0x16110c00}, | |
52 | { .jtag_id = 0xb65f, .die_rev = 0x0, .omap_id = 0x03320400, .type = 0x16212300}, | |
53 | { .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320400, .type = 0x16212300}, | |
54 | { .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x16212300}, | |
55 | { .jtag_id = 0xb5f7, .die_rev = 0x0, .omap_id = 0x03330000, .type = 0x17100000}, | |
56 | { .jtag_id = 0xb5f7, .die_rev = 0x1, .omap_id = 0x03330100, .type = 0x17100000}, | |
57 | { .jtag_id = 0xb5f7, .die_rev = 0x2, .omap_id = 0x03330100, .type = 0x17100000}, | |
58 | }; | |
59 | ||
84a34344 LL |
60 | unsigned int omap_rev(void) |
61 | { | |
62 | return omap_revision; | |
63 | } | |
64 | EXPORT_SYMBOL(omap_rev); | |
65 | ||
f577ffd7 TL |
66 | /* |
67 | * Get OMAP type from PROD_ID. | |
68 | * 1710 has the PROD_ID in bits 15:00, not in 16:01 as documented in TRM. | |
69 | * 1510 PROD_ID is empty, and 1610 PROD_ID does not make sense. | |
70 | * Undocumented register in TEST BLOCK is used as fallback; This seems to | |
71 | * work on 1510, 1610 & 1710. The official way hopefully will work in future | |
72 | * processors. | |
73 | */ | |
74 | static u16 __init omap_get_jtag_id(void) | |
75 | { | |
76 | u32 prod_id, omap_id; | |
77 | ||
78 | prod_id = omap_readl(OMAP_PRODUCTION_ID_1); | |
79 | omap_id = omap_readl(OMAP32_ID_1); | |
80 | ||
ae302f40 | 81 | /* Check for unusable OMAP_PRODUCTION_ID_1 on 1611B/5912 and 730/850 */ |
f577ffd7 TL |
82 | if (((prod_id >> 20) == 0) || (prod_id == omap_id)) |
83 | prod_id = 0; | |
84 | else | |
85 | prod_id &= 0xffff; | |
86 | ||
87 | if (prod_id) | |
88 | return prod_id; | |
89 | ||
90 | /* Use OMAP32_ID_1 as fallback */ | |
91 | prod_id = ((omap_id >> 12) & 0xffff); | |
92 | ||
93 | return prod_id; | |
94 | } | |
95 | ||
96 | /* | |
97 | * Get OMAP revision from DIE_REV. | |
98 | * Early 1710 processors may have broken OMAP_DIE_ID, it contains PROD_ID. | |
99 | * Undocumented register in the TEST BLOCK is used as fallback. | |
100 | * REVISIT: This does not seem to work on 1510 | |
101 | */ | |
102 | static u8 __init omap_get_die_rev(void) | |
103 | { | |
104 | u32 die_rev; | |
105 | ||
106 | die_rev = omap_readl(OMAP_DIE_ID_1); | |
107 | ||
108 | /* Check for broken OMAP_DIE_ID on early 1710 */ | |
109 | if (((die_rev >> 12) & 0xffff) == omap_get_jtag_id()) | |
110 | die_rev = 0; | |
111 | ||
112 | die_rev = (die_rev >> 17) & 0xf; | |
113 | if (die_rev) | |
114 | return die_rev; | |
115 | ||
116 | die_rev = (omap_readl(OMAP32_ID_1) >> 28) & 0xf; | |
117 | ||
118 | return die_rev; | |
119 | } | |
120 | ||
121 | void __init omap_check_revision(void) | |
122 | { | |
123 | int i; | |
124 | u16 jtag_id; | |
125 | u8 die_rev; | |
126 | u32 omap_id; | |
127 | u8 cpu_type; | |
128 | ||
129 | jtag_id = omap_get_jtag_id(); | |
130 | die_rev = omap_get_die_rev(); | |
131 | omap_id = omap_readl(OMAP32_ID_0); | |
132 | ||
133 | #ifdef DEBUG | |
84a34344 LL |
134 | printk(KERN_DEBUG "OMAP_DIE_ID_0: 0x%08x\n", omap_readl(OMAP_DIE_ID_0)); |
135 | printk(KERN_DEBUG "OMAP_DIE_ID_1: 0x%08x DIE_REV: %i\n", | |
f577ffd7 TL |
136 | omap_readl(OMAP_DIE_ID_1), |
137 | (omap_readl(OMAP_DIE_ID_1) >> 17) & 0xf); | |
84a34344 LL |
138 | printk(KERN_DEBUG "OMAP_PRODUCTION_ID_0: 0x%08x\n", |
139 | omap_readl(OMAP_PRODUCTION_ID_0)); | |
140 | printk(KERN_DEBUG "OMAP_PRODUCTION_ID_1: 0x%08x JTAG_ID: 0x%04x\n", | |
f577ffd7 TL |
141 | omap_readl(OMAP_PRODUCTION_ID_1), |
142 | omap_readl(OMAP_PRODUCTION_ID_1) & 0xffff); | |
84a34344 LL |
143 | printk(KERN_DEBUG "OMAP32_ID_0: 0x%08x\n", omap_readl(OMAP32_ID_0)); |
144 | printk(KERN_DEBUG "OMAP32_ID_1: 0x%08x\n", omap_readl(OMAP32_ID_1)); | |
145 | printk(KERN_DEBUG "JTAG_ID: 0x%04x DIE_REV: %i\n", jtag_id, die_rev); | |
f577ffd7 TL |
146 | #endif |
147 | ||
148 | system_serial_high = omap_readl(OMAP_DIE_ID_0); | |
149 | system_serial_low = omap_readl(OMAP_DIE_ID_1); | |
150 | ||
151 | /* First check only the major version in a safe way */ | |
152 | for (i = 0; i < ARRAY_SIZE(omap_ids); i++) { | |
153 | if (jtag_id == (omap_ids[i].jtag_id)) { | |
84a34344 | 154 | omap_revision = omap_ids[i].type; |
f577ffd7 TL |
155 | break; |
156 | } | |
157 | } | |
158 | ||
159 | /* Check if we can find the die revision */ | |
160 | for (i = 0; i < ARRAY_SIZE(omap_ids); i++) { | |
161 | if (jtag_id == omap_ids[i].jtag_id && die_rev == omap_ids[i].die_rev) { | |
84a34344 | 162 | omap_revision = omap_ids[i].type; |
f577ffd7 TL |
163 | break; |
164 | } | |
165 | } | |
166 | ||
167 | /* Finally check also the omap_id */ | |
168 | for (i = 0; i < ARRAY_SIZE(omap_ids); i++) { | |
169 | if (jtag_id == omap_ids[i].jtag_id | |
170 | && die_rev == omap_ids[i].die_rev | |
171 | && omap_id == omap_ids[i].omap_id) { | |
84a34344 | 172 | omap_revision = omap_ids[i].type; |
f577ffd7 TL |
173 | break; |
174 | } | |
175 | } | |
176 | ||
177 | /* Add the cpu class info (7xx, 15xx, 16xx, 24xx) */ | |
84a34344 | 178 | cpu_type = omap_revision >> 24; |
f577ffd7 TL |
179 | |
180 | switch (cpu_type) { | |
181 | case 0x07: | |
ae302f40 | 182 | case 0x08: |
84a34344 | 183 | omap_revision |= 0x07; |
f577ffd7 | 184 | break; |
3179a019 | 185 | case 0x03: |
f577ffd7 | 186 | case 0x15: |
84a34344 | 187 | omap_revision |= 0x15; |
f577ffd7 TL |
188 | break; |
189 | case 0x16: | |
190 | case 0x17: | |
84a34344 | 191 | omap_revision |= 0x16; |
f577ffd7 | 192 | break; |
f577ffd7 | 193 | default: |
84a34344 | 194 | printk(KERN_INFO "Unknown OMAP cpu type: 0x%02x\n", cpu_type); |
f577ffd7 TL |
195 | } |
196 | ||
84a34344 LL |
197 | printk(KERN_INFO "OMAP%04x", omap_revision >> 16); |
198 | if ((omap_revision >> 8) & 0xff) | |
199 | printk(KERN_INFO "%x", (omap_revision >> 8) & 0xff); | |
200 | printk(KERN_INFO " revision %i handled as %02xxx id: %08x%08x\n", | |
201 | die_rev, omap_revision & 0xff, system_serial_low, | |
f577ffd7 TL |
202 | system_serial_high); |
203 | } | |
204 |