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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> |
9f97da78 | 18 | #include <asm/system_info.h> |
2e3ee9f4 | 19 | |
e4c060db | 20 | #include "soc.h" |
f577ffd7 | 21 | |
2c799cef TL |
22 | #include <mach/hardware.h> |
23 | ||
e2ed89fc PW |
24 | #include "common.h" |
25 | ||
3179a019 TL |
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 | |
32 | ||
f577ffd7 TL |
33 | struct omap_id { |
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] */ | |
38 | }; | |
39 | ||
84a34344 LL |
40 | static unsigned int omap_revision; |
41 | ||
f577ffd7 TL |
42 | /* Register values to detect the OMAP version */ |
43 | static struct omap_id omap_ids[] __initdata = { | |
3179a019 | 44 | { .jtag_id = 0xb574, .die_rev = 0x2, .omap_id = 0x03310315, .type = 0x03100000}, |
f577ffd7 TL |
45 | { .jtag_id = 0x355f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300100}, |
46 | { .jtag_id = 0xb55f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300300}, | |
f5ee2fc7 | 47 | { .jtag_id = 0xb62c, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x08500000}, |
f577ffd7 TL |
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}, | |
64 | }; | |
65 | ||
84a34344 LL |
66 | unsigned int omap_rev(void) |
67 | { | |
68 | return omap_revision; | |
69 | } | |
70 | EXPORT_SYMBOL(omap_rev); | |
71 | ||
f577ffd7 TL |
72 | /* |
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 | |
78 | * processors. | |
79 | */ | |
80 | static u16 __init omap_get_jtag_id(void) | |
81 | { | |
82 | u32 prod_id, omap_id; | |
83 | ||
84 | prod_id = omap_readl(OMAP_PRODUCTION_ID_1); | |
85 | omap_id = omap_readl(OMAP32_ID_1); | |
86 | ||
ae302f40 | 87 | /* Check for unusable OMAP_PRODUCTION_ID_1 on 1611B/5912 and 730/850 */ |
f577ffd7 TL |
88 | if (((prod_id >> 20) == 0) || (prod_id == omap_id)) |
89 | prod_id = 0; | |
90 | else | |
91 | prod_id &= 0xffff; | |
92 | ||
93 | if (prod_id) | |
94 | return prod_id; | |
95 | ||
96 | /* Use OMAP32_ID_1 as fallback */ | |
97 | prod_id = ((omap_id >> 12) & 0xffff); | |
98 | ||
99 | return prod_id; | |
100 | } | |
101 | ||
102 | /* | |
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 | |
107 | */ | |
108 | static u8 __init omap_get_die_rev(void) | |
109 | { | |
110 | u32 die_rev; | |
111 | ||
112 | die_rev = omap_readl(OMAP_DIE_ID_1); | |
113 | ||
114 | /* Check for broken OMAP_DIE_ID on early 1710 */ | |
115 | if (((die_rev >> 12) & 0xffff) == omap_get_jtag_id()) | |
116 | die_rev = 0; | |
117 | ||
118 | die_rev = (die_rev >> 17) & 0xf; | |
119 | if (die_rev) | |
120 | return die_rev; | |
121 | ||
122 | die_rev = (omap_readl(OMAP32_ID_1) >> 28) & 0xf; | |
123 | ||
124 | return die_rev; | |
125 | } | |
126 | ||
127 | void __init omap_check_revision(void) | |
128 | { | |
129 | int i; | |
130 | u16 jtag_id; | |
131 | u8 die_rev; | |
132 | u32 omap_id; | |
133 | u8 cpu_type; | |
134 | ||
135 | jtag_id = omap_get_jtag_id(); | |
136 | die_rev = omap_get_die_rev(); | |
137 | omap_id = omap_readl(OMAP32_ID_0); | |
138 | ||
139 | #ifdef DEBUG | |
84a34344 LL |
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", | |
f577ffd7 TL |
142 | omap_readl(OMAP_DIE_ID_1), |
143 | (omap_readl(OMAP_DIE_ID_1) >> 17) & 0xf); | |
84a34344 LL |
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", | |
f577ffd7 TL |
147 | omap_readl(OMAP_PRODUCTION_ID_1), |
148 | omap_readl(OMAP_PRODUCTION_ID_1) & 0xffff); | |
84a34344 LL |
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); | |
f577ffd7 TL |
152 | #endif |
153 | ||
154 | system_serial_high = omap_readl(OMAP_DIE_ID_0); | |
155 | system_serial_low = omap_readl(OMAP_DIE_ID_1); | |
156 | ||
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)) { | |
84a34344 | 160 | omap_revision = omap_ids[i].type; |
f577ffd7 TL |
161 | break; |
162 | } | |
163 | } | |
164 | ||
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) { | |
84a34344 | 168 | omap_revision = omap_ids[i].type; |
f577ffd7 TL |
169 | break; |
170 | } | |
171 | } | |
172 | ||
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) { | |
84a34344 | 178 | omap_revision = omap_ids[i].type; |
f577ffd7 TL |
179 | break; |
180 | } | |
181 | } | |
182 | ||
183 | /* Add the cpu class info (7xx, 15xx, 16xx, 24xx) */ | |
84a34344 | 184 | cpu_type = omap_revision >> 24; |
f577ffd7 TL |
185 | |
186 | switch (cpu_type) { | |
187 | case 0x07: | |
ae302f40 | 188 | case 0x08: |
84a34344 | 189 | omap_revision |= 0x07; |
f577ffd7 | 190 | break; |
3179a019 | 191 | case 0x03: |
f577ffd7 | 192 | case 0x15: |
84a34344 | 193 | omap_revision |= 0x15; |
f577ffd7 TL |
194 | break; |
195 | case 0x16: | |
196 | case 0x17: | |
84a34344 | 197 | omap_revision |= 0x16; |
f577ffd7 | 198 | break; |
f577ffd7 | 199 | default: |
84a34344 | 200 | printk(KERN_INFO "Unknown OMAP cpu type: 0x%02x\n", cpu_type); |
f577ffd7 TL |
201 | } |
202 | ||
84a34344 LL |
203 | printk(KERN_INFO "OMAP%04x", omap_revision >> 16); |
204 | if ((omap_revision >> 8) & 0xff) | |
205 | printk(KERN_INFO "%x", (omap_revision >> 8) & 0xff); | |
206 | printk(KERN_INFO " revision %i handled as %02xxx id: %08x%08x\n", | |
207 | die_rev, omap_revision & 0xff, system_serial_low, | |
f577ffd7 TL |
208 | system_serial_high); |
209 | } | |
210 |