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/*
* arch/arm/mach-mxs/include/mach/uncompress.h
*
* Copyright (C) 1999 ARM Limited
* Copyright (C) Shane Nay (shane@minirl.com)
* Copyright 2010 Freescale Semiconductor, Inc. All Rights Reserved.
*
* 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.
*/
#ifndef __MACH_MXS_UNCOMPRESS_H__
#define __MACH_MXS_UNCOMPRESS_H__
unsigned long mxs_duart_base;
#define MXS_DUART(x) (*(volatile unsigned long *)(mxs_duart_base + (x)))
#define MXS_DUART_DR 0x00
#define MXS_DUART_FR 0x18
#define MXS_DUART_FR_TXFE (1 << 7)
#define MXS_DUART_CR 0x30
#define MXS_DUART_CR_UARTEN (1 << 0)
/*
* The following code assumes the serial port has already been
* initialized by the bootloader. If it's not, the output is
* simply discarded.
*/
static void putc(int ch)
{
if (!mxs_duart_base)
return;
if (!(MXS_DUART(MXS_DUART_CR) & MXS_DUART_CR_UARTEN))
return;
while (!(MXS_DUART(MXS_DUART_FR) & MXS_DUART_FR_TXFE))
barrier();
MXS_DUART(MXS_DUART_DR) = ch;
}
static inline void flush(void)
{
}
#define MX23_DUART_BASE_ADDR 0x80070000
#define MX28_DUART_BASE_ADDR 0x80074000
#define MXS_DIGCTL_CHIPID 0x8001c310
static inline void __arch_decomp_setup(unsigned long arch_id)
{
u16 chipid = (*(volatile unsigned long *) MXS_DIGCTL_CHIPID) >> 16;
switch (chipid) {
case 0x3780:
mxs_duart_base = MX23_DUART_BASE_ADDR;
break;
case 0x2800:
mxs_duart_base = MX28_DUART_BASE_ADDR;
break;
default:
break;
}
}
#define arch_decomp_setup() __arch_decomp_setup(arch_id)
#endif /* __MACH_MXS_UNCOMPRESS_H__ */
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