| /* |
| * MX3 CPU type detection |
| * |
| * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/io.h> |
| #include <mach/hardware.h> |
| #include <mach/iim.h> |
| |
| unsigned int mx31_cpu_rev; |
| EXPORT_SYMBOL(mx31_cpu_rev); |
| |
| struct mx3_cpu_type { |
| u8 srev; |
| const char *name; |
| const char *v; |
| unsigned int rev; |
| }; |
| |
| static struct mx3_cpu_type mx31_cpu_type[] __initdata = { |
| { .srev = 0x00, .name = "i.MX31(L)", .v = "1.0", .rev = MX3x_CHIP_REV_1_0 }, |
| { .srev = 0x10, .name = "i.MX31", .v = "1.1", .rev = MX3x_CHIP_REV_1_1 }, |
| { .srev = 0x11, .name = "i.MX31L", .v = "1.1", .rev = MX3x_CHIP_REV_1_1 }, |
| { .srev = 0x12, .name = "i.MX31", .v = "1.15", .rev = MX3x_CHIP_REV_1_1 }, |
| { .srev = 0x13, .name = "i.MX31L", .v = "1.15", .rev = MX3x_CHIP_REV_1_1 }, |
| { .srev = 0x14, .name = "i.MX31", .v = "1.2", .rev = MX3x_CHIP_REV_1_2 }, |
| { .srev = 0x15, .name = "i.MX31L", .v = "1.2", .rev = MX3x_CHIP_REV_1_2 }, |
| { .srev = 0x28, .name = "i.MX31", .v = "2.0", .rev = MX3x_CHIP_REV_2_0 }, |
| { .srev = 0x29, .name = "i.MX31L", .v = "2.0", .rev = MX3x_CHIP_REV_2_0 }, |
| }; |
| |
| void __init mx31_read_cpu_rev(void) |
| { |
| u32 i, srev; |
| |
| /* read SREV register from IIM module */ |
| srev = __raw_readl(MX31_IO_ADDRESS(MX31_IIM_BASE_ADDR + MXC_IIMSREV)); |
| |
| for (i = 0; i < ARRAY_SIZE(mx31_cpu_type); i++) |
| if (srev == mx31_cpu_type[i].srev) { |
| printk(KERN_INFO |
| "CPU identified as %s, silicon rev %s\n", |
| mx31_cpu_type[i].name, mx31_cpu_type[i].v); |
| |
| mx31_cpu_rev = mx31_cpu_type[i].rev; |
| return; |
| } |
| |
| printk(KERN_WARNING "Unknown CPU identifier. srev = %02x\n", srev); |
| } |