Daniel Mack | 52939c0 | 2009-11-21 20:17:18 +0100 | [diff] [blame] | 1 | /* |
| 2 | * MX3 CPU type detection |
| 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> |
| 14 | #include <mach/hardware.h> |
| 15 | #include <mach/iim.h> |
| 16 | |
| 17 | unsigned int mx31_cpu_rev; |
| 18 | EXPORT_SYMBOL(mx31_cpu_rev); |
| 19 | |
| 20 | struct mx3_cpu_type { |
| 21 | u8 srev; |
| 22 | const char *name; |
| 23 | const char *v; |
| 24 | unsigned int rev; |
| 25 | }; |
| 26 | |
| 27 | static struct mx3_cpu_type mx31_cpu_type[] __initdata = { |
| 28 | { .srev = 0x00, .name = "i.MX31(L)", .v = "1.0", .rev = CHIP_REV_1_0 }, |
| 29 | { .srev = 0x10, .name = "i.MX31", .v = "1.1", .rev = CHIP_REV_1_1 }, |
| 30 | { .srev = 0x11, .name = "i.MX31L", .v = "1.1", .rev = CHIP_REV_1_1 }, |
| 31 | { .srev = 0x12, .name = "i.MX31", .v = "1.15", .rev = CHIP_REV_1_1 }, |
| 32 | { .srev = 0x13, .name = "i.MX31L", .v = "1.15", .rev = CHIP_REV_1_1 }, |
| 33 | { .srev = 0x14, .name = "i.MX31", .v = "1.2", .rev = CHIP_REV_1_2 }, |
| 34 | { .srev = 0x15, .name = "i.MX31L", .v = "1.2", .rev = CHIP_REV_1_2 }, |
| 35 | { .srev = 0x28, .name = "i.MX31", .v = "2.0", .rev = CHIP_REV_2_0 }, |
| 36 | { .srev = 0x29, .name = "i.MX31L", .v = "2.0", .rev = CHIP_REV_2_0 }, |
| 37 | }; |
| 38 | |
| 39 | void __init mx31_read_cpu_rev(void) |
| 40 | { |
| 41 | u32 i, srev; |
| 42 | |
| 43 | /* read SREV register from IIM module */ |
Uwe Kleine-König | a9b7a2d | 2009-12-17 11:56:43 +0100 | [diff] [blame] | 44 | srev = __raw_readl(IO_ADDRESS(IIM_BASE_ADDR + MXC_IIMSREV)); |
Daniel Mack | 52939c0 | 2009-11-21 20:17:18 +0100 | [diff] [blame] | 45 | |
| 46 | for (i = 0; i < ARRAY_SIZE(mx31_cpu_type); i++) |
| 47 | if (srev == mx31_cpu_type[i].srev) { |
| 48 | printk(KERN_INFO |
| 49 | "CPU identified as %s, silicon rev %s\n", |
| 50 | mx31_cpu_type[i].name, mx31_cpu_type[i].v); |
| 51 | |
| 52 | mx31_cpu_rev = mx31_cpu_type[i].rev; |
| 53 | return; |
| 54 | } |
| 55 | |
| 56 | printk(KERN_WARNING "Unknown CPU identifier. srev = %02x\n", srev); |
| 57 | } |