1/*
2 * arch/arm/mach-pxa/include/mach/uncompress.h
3 *
4 * Author:	Nicolas Pitre
5 * Copyright:	(C) 2001 MontaVista Software Inc.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12#include <linux/serial_reg.h>
13#include <asm/mach-types.h>
14
15#define FFUART_BASE	(0x40100000)
16#define BTUART_BASE	(0x40200000)
17#define STUART_BASE	(0x40700000)
18
19unsigned long uart_base;
20unsigned int uart_shift;
21unsigned int uart_is_pxa;
22
23static inline unsigned char uart_read(int offset)
24{
25	return *(volatile unsigned char *)(uart_base + (offset << uart_shift));
26}
27
28static inline void uart_write(unsigned char val, int offset)
29{
30	*(volatile unsigned char *)(uart_base + (offset << uart_shift)) = val;
31}
32
33static inline int uart_is_enabled(void)
34{
35	/* assume enabled by default for non-PXA uarts */
36	return uart_is_pxa ? uart_read(UART_IER) & UART_IER_UUE : 1;
37}
38
39static inline void putc(char c)
40{
41	if (!uart_is_enabled())
42		return;
43
44	while (!(uart_read(UART_LSR) & UART_LSR_THRE))
45		barrier();
46
47	uart_write(c, UART_TX);
48}
49
50/*
51 * This does not append a newline
52 */
53static inline void flush(void)
54{
55}
56
57static inline void arch_decomp_setup(void)
58{
59	/* initialize to default */
60	uart_base = FFUART_BASE;
61	uart_shift = 2;
62	uart_is_pxa = 1;
63
64	if (machine_is_littleton() || machine_is_intelmote2()
65	    || machine_is_csb726() || machine_is_stargate2()
66	    || machine_is_cm_x300() || machine_is_balloon3())
67		uart_base = STUART_BASE;
68
69	if (machine_is_arcom_zeus()) {
70		uart_base = 0x10000000;	/* nCS4 */
71		uart_shift = 1;
72		uart_is_pxa = 0;
73	}
74}
75