Commit | Line | Data |
---|---|---|
52939c03 | 1 | /* |
27ad4bf7 | 2 | * MX31 CPU type detection |
52939c03 DM |
3 | * |
4 | * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #include <linux/module.h> | |
13 | #include <linux/io.h> | |
e3372474 SG |
14 | |
15 | #include "common.h" | |
50f2de61 | 16 | #include "hardware.h" |
17c342ae | 17 | #include "iim.h" |
52939c03 | 18 | |
ab116a86 | 19 | static int mx31_cpu_rev = -1; |
52939c03 | 20 | |
27ad4bf7 | 21 | static struct { |
52939c03 DM |
22 | u8 srev; |
23 | const char *name; | |
52939c03 | 24 | unsigned int rev; |
ab116a86 JL |
25 | } mx31_cpu_type[] = { |
26 | { .srev = 0x00, .name = "i.MX31(L)", .rev = IMX_CHIP_REVISION_1_0 }, | |
27 | { .srev = 0x10, .name = "i.MX31", .rev = IMX_CHIP_REVISION_1_1 }, | |
28 | { .srev = 0x11, .name = "i.MX31L", .rev = IMX_CHIP_REVISION_1_1 }, | |
29 | { .srev = 0x12, .name = "i.MX31", .rev = IMX_CHIP_REVISION_1_1 }, | |
30 | { .srev = 0x13, .name = "i.MX31L", .rev = IMX_CHIP_REVISION_1_1 }, | |
31 | { .srev = 0x14, .name = "i.MX31", .rev = IMX_CHIP_REVISION_1_2 }, | |
32 | { .srev = 0x15, .name = "i.MX31L", .rev = IMX_CHIP_REVISION_1_2 }, | |
33 | { .srev = 0x28, .name = "i.MX31", .rev = IMX_CHIP_REVISION_2_0 }, | |
34 | { .srev = 0x29, .name = "i.MX31L", .rev = IMX_CHIP_REVISION_2_0 }, | |
52939c03 DM |
35 | }; |
36 | ||
ab116a86 | 37 | static int mx31_read_cpu_rev(void) |
52939c03 DM |
38 | { |
39 | u32 i, srev; | |
40 | ||
41 | /* read SREV register from IIM module */ | |
c553138f | 42 | srev = imx_readl(MX31_IO_ADDRESS(MX31_IIM_BASE_ADDR + MXC_IIMSREV)); |
ab116a86 | 43 | srev &= 0xff; |
52939c03 DM |
44 | |
45 | for (i = 0; i < ARRAY_SIZE(mx31_cpu_type); i++) | |
46 | if (srev == mx31_cpu_type[i].srev) { | |
ab116a86 JL |
47 | imx_print_silicon_rev(mx31_cpu_type[i].name, |
48 | mx31_cpu_type[i].rev); | |
49 | return mx31_cpu_type[i].rev; | |
52939c03 DM |
50 | } |
51 | ||
ab116a86 JL |
52 | imx_print_silicon_rev("i.MX31", IMX_CHIP_REVISION_UNKNOWN); |
53 | return IMX_CHIP_REVISION_UNKNOWN; | |
54 | } | |
55 | ||
56 | int mx31_revision(void) | |
57 | { | |
58 | if (mx31_cpu_rev == -1) | |
59 | mx31_cpu_rev = mx31_read_cpu_rev(); | |
9ab4650f | 60 | |
ab116a86 | 61 | return mx31_cpu_rev; |
52939c03 | 62 | } |
ab116a86 | 63 | EXPORT_SYMBOL(mx31_revision); |