1/*
2 * linux/include/asm-arm/arch-omap/uncompress.h
3 *
4 * Serial port stubs for kernel decompress status messages
5 *
6 * Initially based on:
7 * linux-2.4.15-rmk1-dsplinux1.6/include/asm-arm/arch-omap1510/uncompress.h
8 * Copyright (C) 2000 RidgeRun, Inc.
9 * Author: Greg Lonnon <glonnon@ridgerun.com>
10 *
11 * Rewritten by:
12 * Author: <source@mvista.com>
13 * 2004 (c) MontaVista Software, Inc.
14 *
15 * This file is licensed under the terms of the GNU General Public License
16 * version 2. This program is licensed "as is" without any warranty of any
17 * kind, whether express or implied.
18 */
19
20#include <linux/types.h>
21#include <linux/serial_reg.h>
22#include <asm/arch/serial.h>
23
24unsigned int system_rev;
25
26#define UART_OMAP_MDR1		0x08	/* mode definition register */
27#define OMAP_ID_730		0x355F
28#define ID_MASK			0x7fff
29#define check_port(base, shift) ((base[UART_OMAP_MDR1 << shift] & 7) == 0)
30#define omap_get_id() ((*(volatile unsigned int *)(0xfffed404)) >> 12) & ID_MASK
31
32static void putc(int c)
33{
34	volatile u8 * uart = 0;
35	int shift = 2;
36
37#ifdef CONFIG_MACH_OMAP_PALMTE
38	return;
39#endif
40
41#ifdef CONFIG_ARCH_OMAP
42#ifdef	CONFIG_OMAP_LL_DEBUG_UART3
43	uart = (volatile u8 *)(OMAP_UART3_BASE);
44#elif defined(CONFIG_OMAP_LL_DEBUG_UART2)
45	uart = (volatile u8 *)(OMAP_UART2_BASE);
46#else
47	uart = (volatile u8 *)(OMAP_UART1_BASE);
48#endif
49
50#ifdef CONFIG_ARCH_OMAP1
51	/* Determine which serial port to use */
52	do {
53		/* MMU is not on, so cpu_is_omapXXXX() won't work here */
54		unsigned int omap_id = omap_get_id();
55
56		if (omap_id == OMAP_ID_730)
57			shift = 0;
58
59		if (check_port(uart, shift))
60			break;
61		/* Silent boot if no serial ports are enabled. */
62		return;
63	} while (0);
64#endif /* CONFIG_ARCH_OMAP1 */
65#endif
66
67	/*
68	 * Now, xmit each character
69	 */
70	while (!(uart[UART_LSR << shift] & UART_LSR_THRE))
71		barrier();
72	uart[UART_TX << shift] = c;
73}
74
75static inline void flush(void)
76{
77}
78
79/*
80 * nothing to do
81 */
82#define arch_decomp_setup()
83#define arch_decomp_wdog()
84