[linux-2.6-block.git] / arch / arm / mach-lpc32xx / common.c

/*
 * 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);
Commit	Line	Data
fc982e1c KW	1	/*
	2	* arch/arm/mach-lpc32xx/common.c
	3	*
	4	* Author: Kevin Wells <kevin.wells@nxp.com>
	5	*
	6	* Copyright (C) 2010 NXP Semiconductors
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*/
	18
	19	#include <linux/init.h>
fc982e1c KW	20
fc982e1c KW	21	#include <asm/mach/map.h>
e39942f5	22	#include <asm/system_info.h>
fc982e1c	23
fc982e1c KW	24	#include <mach/hardware.h>
	25	#include <mach/platform.h>
	26	#include "common.h"
	27
fc982e1c KW	28	/*
	29	* Returns the unique ID for the device
	30	*/
	31	void lpc32xx_get_uid(u32 devid[4])
	32	{
	33	int i;
	34
	35	for (i = 0; i < 4; i++)
	36	devid[i] = __raw_readl(LPC32XX_CLKPWR_DEVID(i << 2));
	37	}
	38
fc982e1c KW	39	/*
	40	* Detects and returns IRAM size for the device variation
	41	*/
	42	#define LPC32XX_IRAM_BANK_SIZE SZ_128K
	43	static u32 iram_size;
	44	u32 lpc32xx_return_iram_size(void)
	45	{
	46	if (iram_size == 0) {
	47	u32 savedval1, savedval2;
	48	void __iomem iramptr1, iramptr2;
	49
	50	iramptr1 = io_p2v(LPC32XX_IRAM_BASE);
	51	iramptr2 = io_p2v(LPC32XX_IRAM_BASE + LPC32XX_IRAM_BANK_SIZE);
	52	savedval1 = __raw_readl(iramptr1);
	53	savedval2 = __raw_readl(iramptr2);
	54
	55	if (savedval1 == savedval2) {
	56	__raw_writel(savedval2 + 1, iramptr2);
	57	if (__raw_readl(iramptr1) == savedval2 + 1)
	58	iram_size = LPC32XX_IRAM_BANK_SIZE;
	59	else
	60	iram_size = LPC32XX_IRAM_BANK_SIZE * 2;
	61	__raw_writel(savedval2, iramptr2);
	62	} else
	63	iram_size = LPC32XX_IRAM_BANK_SIZE * 2;
	64	}
	65
	66	return iram_size;
	67	}
22833d55	68	EXPORT_SYMBOL_GPL(lpc32xx_return_iram_size);
fc982e1c	69
fc982e1c KW	70	static struct map_desc lpc32xx_io_desc[] __initdata = {
fc982e1c KW	71	{
df38b24f	72	.virtual = (unsigned long)IO_ADDRESS(LPC32XX_AHB0_START),
fc982e1c KW	73	.pfn = __phys_to_pfn(LPC32XX_AHB0_START),
	74	.length = LPC32XX_AHB0_SIZE,
	75	.type = MT_DEVICE
	76	},
	77	{
df38b24f	78	.virtual = (unsigned long)IO_ADDRESS(LPC32XX_AHB1_START),
fc982e1c KW	79	.pfn = __phys_to_pfn(LPC32XX_AHB1_START),
	80	.length = LPC32XX_AHB1_SIZE,
	81	.type = MT_DEVICE
	82	},
	83	{
df38b24f	84	.virtual = (unsigned long)IO_ADDRESS(LPC32XX_FABAPB_START),
fc982e1c KW	85	.pfn = __phys_to_pfn(LPC32XX_FABAPB_START),
	86	.length = LPC32XX_FABAPB_SIZE,
	87	.type = MT_DEVICE
	88	},
	89	{
df38b24f	90	.virtual = (unsigned long)IO_ADDRESS(LPC32XX_IRAM_BASE),
fc982e1c KW	91	.pfn = __phys_to_pfn(LPC32XX_IRAM_BASE),
	92	.length = (LPC32XX_IRAM_BANK_SIZE * 2),
	93	.type = MT_DEVICE
	94	},
	95	};
	96
	97	void __init lpc32xx_map_io(void)
	98	{
	99	iotable_init(lpc32xx_io_desc, ARRAY_SIZE(lpc32xx_io_desc));
	100	}
b23fcd90	101
e39942f5	102	static int __init lpc32xx_check_uid(void)
be20dbc8 RS	103	{
	104	u32 uid[4];
	105
	106	lpc32xx_get_uid(uid);
	107
	108	printk(KERN_INFO "LPC32XX unique ID: %08x%08x%08x%08x\n",
	109	uid[3], uid[2], uid[1], uid[0]);
	110
e39942f5 APS	111	if (!system_serial_low && !system_serial_high) {
	112	system_serial_low = uid[0];
	113	system_serial_high = uid[1];
	114	}
	115
be20dbc8 RS	116	return 1;
be20dbc8 RS	117	}
e39942f5	118	arch_initcall(lpc32xx_check_uid);