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/arch/arm/mach-lpc32xx/include/mach/uncompress.h

https://github.com/AICP/kernel_google_msm
C Header | 60 lines | 26 code | 12 blank | 22 comment | 2 complexity | 894d8a56d4c0c3b2f04501360c2363cf MD5 | raw file
 1/*
 2 * arch/arm/mach-lpc32xx/include/mach/uncompress.h
 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#ifndef __ASM_ARM_ARCH_UNCOMPRESS_H
20#define __ASM_ARM_ARCH_UNCOMPRESS_H
21
22#include <linux/io.h>
23
24#include <mach/hardware.h>
25#include <mach/platform.h>
26
27/*
28 * Uncompress output is hardcoded to standard UART 5
29 */
30
31#define UART_FIFO_CTL_TX_RESET	(1 << 2)
32#define UART_STATUS_TX_MT	(1 << 6)
33
34#define _UARTREG(x)		(void __iomem *)(LPC32XX_UART5_BASE + (x))
35
36#define LPC32XX_UART_DLLFIFO_O	0x00
37#define LPC32XX_UART_IIRFCR_O	0x08
38#define LPC32XX_UART_LSR_O	0x14
39
40static inline void putc(int ch)
41{
42	/* Wait for transmit FIFO to empty */
43	while ((__raw_readl(_UARTREG(LPC32XX_UART_LSR_O)) &
44		UART_STATUS_TX_MT) == 0)
45		;
46
47	__raw_writel((u32) ch, _UARTREG(LPC32XX_UART_DLLFIFO_O));
48}
49
50static inline void flush(void)
51{
52	__raw_writel(__raw_readl(_UARTREG(LPC32XX_UART_IIRFCR_O)) |
53		UART_FIFO_CTL_TX_RESET, _UARTREG(LPC32XX_UART_IIRFCR_O));
54}
55
56/* NULL functions; we don't presently need them */
57#define arch_decomp_setup()
58#define arch_decomp_wdog()
59
60#endif