/* * arch/arm/mach-lpc32xx/common.c * * Author: Kevin Wells <kevin.wells@nxp.com> * * Copyright (C) 2010 NXP Semiconductors * * 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. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/init.h> #include <asm/mach/map.h> #include <asm/system_info.h> #include <mach/hardware.h> #include <mach/platform.h> #include "common.h" /* * Returns the unique ID for the device */ void lpc32xx_get_uid(u32 devid[4]) { int i; for (i = 0; i < 4; i++) devid[i] = __raw_readl(LPC32XX_CLKPWR_DEVID(i << 2)); } /* * Detects and returns IRAM size for the device variation */ #define LPC32XX_IRAM_BANK_SIZE SZ_128K static u32 iram_size; u32 lpc32xx_return_iram_size(void) { if (iram_size == 0) { u32 savedval1, savedval2; void __iomem *iramptr1, *iramptr2; iramptr1 = io_p2v(LPC32XX_IRAM_BASE); iramptr2 = io_p2v(LPC32XX_IRAM_BASE + LPC32XX_IRAM_BANK_SIZE); savedval1 = __raw_readl(iramptr1); savedval2 = __raw_readl(iramptr2); if (savedval1 == savedval2) { __raw_writel(savedval2 + 1, iramptr2); if (__raw_readl(iramptr1) == savedval2 + 1) iram_size = LPC32XX_IRAM_BANK_SIZE; else iram_size = LPC32XX_IRAM_BANK_SIZE * 2; __raw_writel(savedval2, iramptr2); } else iram_size = LPC32XX_IRAM_BANK_SIZE * 2; } return iram_size; } EXPORT_SYMBOL_GPL(lpc32xx_return_iram_size); static struct map_desc lpc32xx_io_desc[] __initdata = { { .virtual = (unsigned long)IO_ADDRESS(LPC32XX_AHB0_START), .pfn = __phys_to_pfn(LPC32XX_AHB0_START), .length = LPC32XX_AHB0_SIZE, .type = MT_DEVICE }, { .virtual = (unsigned long)IO_ADDRESS(LPC32XX_AHB1_START), .pfn = __phys_to_pfn(LPC32XX_AHB1_START), .length = LPC32XX_AHB1_SIZE, .type = MT_DEVICE }, { .virtual = (unsigned long)IO_ADDRESS(LPC32XX_FABAPB_START), .pfn = __phys_to_pfn(LPC32XX_FABAPB_START), .length = LPC32XX_FABAPB_SIZE, .type = MT_DEVICE }, { .virtual = (unsigned long)IO_ADDRESS(LPC32XX_IRAM_BASE), .pfn = __phys_to_pfn(LPC32XX_IRAM_BASE), .length = (LPC32XX_IRAM_BANK_SIZE * 2), .type = MT_DEVICE }, }; void __init lpc32xx_map_io(void) { iotable_init(lpc32xx_io_desc, ARRAY_SIZE(lpc32xx_io_desc)); } static int __init lpc32xx_check_uid(void) { u32 uid[4]; lpc32xx_get_uid(uid); printk(KERN_INFO "LPC32XX unique ID: %08x%08x%08x%08x\n", uid[3], uid[2], uid[1], uid[0]); if (!system_serial_low && !system_serial_high) { system_serial_low = uid[0]; system_serial_high = uid[1]; } return 1; } arch_initcall(lpc32xx_check_uid);