diff options
Diffstat (limited to 'arch/arm/mach-davinci/id.c')
-rw-r--r-- | arch/arm/mach-davinci/id.c | 116 |
1 files changed, 0 insertions, 116 deletions
diff --git a/arch/arm/mach-davinci/id.c b/arch/arm/mach-davinci/id.c deleted file mode 100644 index 018b994cd794..000000000000 --- a/arch/arm/mach-davinci/id.c +++ /dev/null | |||
@@ -1,116 +0,0 @@ | |||
1 | /* | ||
2 | * Davinci CPU identification code | ||
3 | * | ||
4 | * Copyright (C) 2006 Komal Shah <komal_shah802003@yahoo.com> | ||
5 | * | ||
6 | * Derived from OMAP1 CPU identification code. | ||
7 | * | ||
8 | * This program is free software; you can redistribute it and/or modify | ||
9 | * it under the terms of the GNU General Public License version 2 as | ||
10 | * published by the Free Software Foundation. | ||
11 | */ | ||
12 | |||
13 | #include <linux/module.h> | ||
14 | #include <linux/kernel.h> | ||
15 | #include <linux/init.h> | ||
16 | #include <linux/io.h> | ||
17 | |||
18 | #define JTAG_ID_BASE IO_ADDRESS(0x01c40028) | ||
19 | |||
20 | static unsigned int davinci_revision; | ||
21 | |||
22 | struct davinci_id { | ||
23 | u8 variant; /* JTAG ID bits 31:28 */ | ||
24 | u16 part_no; /* JTAG ID bits 27:12 */ | ||
25 | u32 manufacturer; /* JTAG ID bits 11:1 */ | ||
26 | u32 type; /* Cpu id bits [31:8], cpu class bits [7:0] */ | ||
27 | }; | ||
28 | |||
29 | /* Register values to detect the DaVinci version */ | ||
30 | static struct davinci_id davinci_ids[] __initdata = { | ||
31 | { | ||
32 | /* DM6446 */ | ||
33 | .part_no = 0xb700, | ||
34 | .variant = 0x0, | ||
35 | .manufacturer = 0x017, | ||
36 | .type = 0x64460000, | ||
37 | }, | ||
38 | { | ||
39 | /* DM646X */ | ||
40 | .part_no = 0xb770, | ||
41 | .variant = 0x0, | ||
42 | .manufacturer = 0x017, | ||
43 | .type = 0x64670000, | ||
44 | }, | ||
45 | { | ||
46 | /* DM355 */ | ||
47 | .part_no = 0xb73b, | ||
48 | .variant = 0x0, | ||
49 | .manufacturer = 0x00f, | ||
50 | .type = 0x03550000, | ||
51 | }, | ||
52 | }; | ||
53 | |||
54 | /* | ||
55 | * Get Device Part No. from JTAG ID register | ||
56 | */ | ||
57 | static u16 __init davinci_get_part_no(void) | ||
58 | { | ||
59 | u32 dev_id, part_no; | ||
60 | |||
61 | dev_id = __raw_readl(JTAG_ID_BASE); | ||
62 | |||
63 | part_no = ((dev_id >> 12) & 0xffff); | ||
64 | |||
65 | return part_no; | ||
66 | } | ||
67 | |||
68 | /* | ||
69 | * Get Device Revision from JTAG ID register | ||
70 | */ | ||
71 | static u8 __init davinci_get_variant(void) | ||
72 | { | ||
73 | u32 variant; | ||
74 | |||
75 | variant = __raw_readl(JTAG_ID_BASE); | ||
76 | |||
77 | variant = (variant >> 28) & 0xf; | ||
78 | |||
79 | return variant; | ||
80 | } | ||
81 | |||
82 | unsigned int davinci_rev(void) | ||
83 | { | ||
84 | return davinci_revision >> 16; | ||
85 | } | ||
86 | EXPORT_SYMBOL(davinci_rev); | ||
87 | |||
88 | void __init davinci_check_revision(void) | ||
89 | { | ||
90 | int i; | ||
91 | u16 part_no; | ||
92 | u8 variant; | ||
93 | |||
94 | part_no = davinci_get_part_no(); | ||
95 | variant = davinci_get_variant(); | ||
96 | |||
97 | /* First check only the major version in a safe way */ | ||
98 | for (i = 0; i < ARRAY_SIZE(davinci_ids); i++) { | ||
99 | if (part_no == (davinci_ids[i].part_no)) { | ||
100 | davinci_revision = davinci_ids[i].type; | ||
101 | break; | ||
102 | } | ||
103 | } | ||
104 | |||
105 | /* Check if we can find the dev revision */ | ||
106 | for (i = 0; i < ARRAY_SIZE(davinci_ids); i++) { | ||
107 | if (part_no == davinci_ids[i].part_no && | ||
108 | variant == davinci_ids[i].variant) { | ||
109 | davinci_revision = davinci_ids[i].type; | ||
110 | break; | ||
111 | } | ||
112 | } | ||
113 | |||
114 | printk(KERN_INFO "DaVinci DM%04x variant 0x%x\n", | ||
115 | davinci_rev(), variant); | ||
116 | } | ||