diff options
Diffstat (limited to 'arch/arm/mach-mx5/cpu.c')
| -rw-r--r-- | arch/arm/mach-mx5/cpu.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/arch/arm/mach-mx5/cpu.c b/arch/arm/mach-mx5/cpu.c deleted file mode 100644 index 5c5328257dc..00000000000 --- a/arch/arm/mach-mx5/cpu.c +++ /dev/null @@ -1,186 +0,0 @@ -/* - * Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved. - * - * The code contained herein is licensed under the GNU General Public - * License. You may obtain a copy of the GNU General Public License - * Version 2 or later at the following locations: - * - * http://www.opensource.org/licenses/gpl-license.html - * http://www.gnu.org/copyleft/gpl.html - * - * This file contains the CPU initialization code. - */ - -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/module.h> -#include <mach/hardware.h> -#include <asm/io.h> - -static int mx5_cpu_rev = -1; - -#define IIM_SREV 0x24 -#define MX50_HW_ADADIG_DIGPROG 0xB0 - -static int get_mx51_srev(void) -{ - void __iomem *iim_base = MX51_IO_ADDRESS(MX51_IIM_BASE_ADDR); - u32 rev = readl(iim_base + IIM_SREV) & 0xff; - - switch (rev) { - case 0x0: - return IMX_CHIP_REVISION_2_0; - case 0x10: - return IMX_CHIP_REVISION_3_0; - default: - return IMX_CHIP_REVISION_UNKNOWN; - } -} - -/* - * Returns: - * the silicon revision of the cpu - * -EINVAL - not a mx51 - */ -int mx51_revision(void) -{ - if (!cpu_is_mx51()) - return -EINVAL; - - if (mx5_cpu_rev == -1) - mx5_cpu_rev = get_mx51_srev(); - - return mx5_cpu_rev; -} -EXPORT_SYMBOL(mx51_revision); - -#ifdef CONFIG_NEON - -/* - * All versions of the silicon before Rev. 3 have broken NEON implementations. - * Dependent on link order - so the assumption is that vfp_init is called - * before us. - */ -static int __init mx51_neon_fixup(void) -{ - if (!cpu_is_mx51()) - return 0; - - if (mx51_revision() < IMX_CHIP_REVISION_3_0 && (elf_hwcap & HWCAP_NEON)) { - elf_hwcap &= ~HWCAP_NEON; - pr_info("Turning off NEON support, detected broken NEON implementation\n"); - } - return 0; -} - -late_initcall(mx51_neon_fixup); -#endif - -static int get_mx53_srev(void) -{ - void __iomem *iim_base = MX51_IO_ADDRESS(MX53_IIM_BASE_ADDR); - u32 rev = readl(iim_base + IIM_SREV) & 0xff; - - switch (rev) { - case 0x0: - return IMX_CHIP_REVISION_1_0; - case 0x2: - return IMX_CHIP_REVISION_2_0; - case 0x3: - return IMX_CHIP_REVISION_2_1; - default: - return IMX_CHIP_REVISION_UNKNOWN; - } -} - -/* - * Returns: - * the silicon revision of the cpu - * -EINVAL - not a mx53 - */ -int mx53_revision(void) -{ - if (!cpu_is_mx53()) - return -EINVAL; - - if (mx5_cpu_rev == -1) - mx5_cpu_rev = get_mx53_srev(); - - return mx5_cpu_rev; -} -EXPORT_SYMBOL(mx53_revision); - -static int get_mx50_srev(void) -{ - void __iomem *anatop = ioremap(MX50_ANATOP_BASE_ADDR, SZ_8K); - u32 rev; - - if (!anatop) { - mx5_cpu_rev = -EINVAL; - return 0; - } - - rev = readl(anatop + MX50_HW_ADADIG_DIGPROG); - rev &= 0xff; - - iounmap(anatop); - if (rev == 0x0) - return IMX_CHIP_REVISION_1_0; - else if (rev == 0x1) - return IMX_CHIP_REVISION_1_1; - return 0; -} - -/* - * Returns: - * the silicon revision of the cpu - * -EINVAL - not a mx50 - */ -int mx50_revision(void) -{ - if (!cpu_is_mx50()) - return -EINVAL; - - if (mx5_cpu_rev == -1) - mx5_cpu_rev = get_mx50_srev(); - - return mx5_cpu_rev; -} -EXPORT_SYMBOL(mx50_revision); - -static int __init post_cpu_init(void) -{ - unsigned int reg; - void __iomem *base; - - if (cpu_is_mx51() || cpu_is_mx53()) { - if (cpu_is_mx51()) - base = MX51_IO_ADDRESS(MX51_AIPS1_BASE_ADDR); - else - base = MX53_IO_ADDRESS(MX53_AIPS1_BASE_ADDR); - - __raw_writel(0x0, base + 0x40); - __raw_writel(0x0, base + 0x44); - __raw_writel(0x0, base + 0x48); - __raw_writel(0x0, base + 0x4C); - reg = __raw_readl(base + 0x50) & 0x00FFFFFF; - __raw_writel(reg, base + 0x50); - - if (cpu_is_mx51()) - base = MX51_IO_ADDRESS(MX51_AIPS2_BASE_ADDR); - else - base = MX53_IO_ADDRESS(MX53_AIPS2_BASE_ADDR); - - __raw_writel(0x0, base + 0x40); - __raw_writel(0x0, base + 0x44); - __raw_writel(0x0, base + 0x48); - __raw_writel(0x0, base + 0x4C); - reg = __raw_readl(base + 0x50) & 0x00FFFFFF; - __raw_writel(reg, base + 0x50); - } - - return 0; -} - -postcore_initcall(post_cpu_init); |