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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> | |
17 | ||
18 | #include <asm/io.h> | |
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 | ||
34 | /* Register values to detect the OMAP version */ | |
35 | static struct omap_id omap_ids[] __initdata = { | |
3179a019 | 36 | { .jtag_id = 0xb574, .die_rev = 0x2, .omap_id = 0x03310315, .type = 0x03100000}, |
f577ffd7 TL |
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}, | |
55 | }; | |
56 | ||
57 | /* | |
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. | |
64 | */ | |
65 | static u16 __init omap_get_jtag_id(void) | |
66 | { | |
67 | u32 prod_id, omap_id; | |
68 | ||
69 | prod_id = omap_readl(OMAP_PRODUCTION_ID_1); | |
70 | omap_id = omap_readl(OMAP32_ID_1); | |
71 | ||
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; | |
77 | ||
78 | if (prod_id) | |
79 | return prod_id; | |
80 | ||
81 | /* Use OMAP32_ID_1 as fallback */ | |
82 | prod_id = ((omap_id >> 12) & 0xffff); | |
83 | ||
84 | return prod_id; | |
85 | } | |
86 | ||
87 | /* | |
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 | |
92 | */ | |
93 | static u8 __init omap_get_die_rev(void) | |
94 | { | |
95 | u32 die_rev; | |
96 | ||
97 | die_rev = omap_readl(OMAP_DIE_ID_1); | |
98 | ||
99 | /* Check for broken OMAP_DIE_ID on early 1710 */ | |
100 | if (((die_rev >> 12) & 0xffff) == omap_get_jtag_id()) | |
101 | die_rev = 0; | |
102 | ||
103 | die_rev = (die_rev >> 17) & 0xf; | |
104 | if (die_rev) | |
105 | return die_rev; | |
106 | ||
107 | die_rev = (omap_readl(OMAP32_ID_1) >> 28) & 0xf; | |
108 | ||
109 | return die_rev; | |
110 | } | |
111 | ||
112 | void __init omap_check_revision(void) | |
113 | { | |
114 | int i; | |
115 | u16 jtag_id; | |
116 | u8 die_rev; | |
117 | u32 omap_id; | |
118 | u8 cpu_type; | |
119 | ||
120 | jtag_id = omap_get_jtag_id(); | |
121 | die_rev = omap_get_die_rev(); | |
122 | omap_id = omap_readl(OMAP32_ID_0); | |
123 | ||
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 | |
137 | ||
138 | system_serial_high = omap_readl(OMAP_DIE_ID_0); | |
139 | system_serial_low = omap_readl(OMAP_DIE_ID_1); | |
140 | ||
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; | |
146 | } | |
147 | } | |
148 | ||
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; | |
154 | } | |
155 | } | |
156 | ||
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; | |
164 | } | |
165 | } | |
166 | ||
167 | /* Add the cpu class info (7xx, 15xx, 16xx, 24xx) */ | |
168 | cpu_type = system_rev >> 24; | |
169 | ||
170 | switch (cpu_type) { | |
171 | case 0x07: | |
172 | system_rev |= 0x07; | |
173 | break; | |
3179a019 | 174 | case 0x03: |
f577ffd7 TL |
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); | |
187 | } | |
188 | ||
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); | |
195 | } | |
196 |