1/*
2 * Serial port stubs for kernel decompress status messages
3 *
4 * Initially based on:
5 * arch/arm/plat-omap/include/mach/uncompress.h
6 *
7 * Original copyrights follow.
8 *
9 * Copyright (C) 2000 RidgeRun, Inc.
10 * Author: Greg Lonnon <glonnon@ridgerun.com>
11 *
12 * Rewritten by:
13 * Author: <source@mvista.com>
14 * 2004 (c) MontaVista Software, Inc.
15 *
16 * This file is licensed under the terms of the GNU General Public License
17 * version 2. This program is licensed "as is" without any warranty of any
18 * kind, whether express or implied.
19 */
20
21#include <linux/types.h>
22#include <linux/serial_reg.h>
23
24#include <asm/mach-types.h>
25
26#include <mach/serial.h>
27
28#define IOMEM(x)	((void __force __iomem *)(x))
29
30u32 *uart;
31
32/* PORT_16C550A, in polled non-fifo mode */
33static void putc(char c)
34{
35	if (!uart)
36		return;
37
38	while (!(uart[UART_LSR] & UART_LSR_THRE))
39		barrier();
40	uart[UART_TX] = c;
41}
42
43static inline void flush(void)
44{
45	if (!uart)
46		return;
47
48	while (!(uart[UART_LSR] & UART_LSR_THRE))
49		barrier();
50}
51
52static inline void set_uart_info(u32 phys)
53{
54	uart = (u32 *)phys;
55}
56
57#define _DEBUG_LL_ENTRY(machine, phys)				\
58	{							\
59		if (machine_is_##machine()) {			\
60			set_uart_info(phys);			\
61			break;					\
62		}						\
63	}
64
65#define DEBUG_LL_DAVINCI(machine, port)				\
66	_DEBUG_LL_ENTRY(machine, DAVINCI_UART##port##_BASE)
67
68#define DEBUG_LL_DA8XX(machine, port)				\
69	_DEBUG_LL_ENTRY(machine, DA8XX_UART##port##_BASE)
70
71static inline void __arch_decomp_setup(unsigned long arch_id)
72{
73	/*
74	 * Initialize the port based on the machine ID from the bootloader.
75	 * Note that we're using macros here instead of switch statement
76	 * as machine_is functions are optimized out for the boards that
77	 * are not selected.
78	 */
79	do {
80		/* Davinci boards */
81		DEBUG_LL_DAVINCI(davinci_evm,		0);
82		DEBUG_LL_DAVINCI(sffsdr,		0);
83		DEBUG_LL_DAVINCI(neuros_osd2,		0);
84		DEBUG_LL_DAVINCI(davinci_dm355_evm,	0);
85		DEBUG_LL_DAVINCI(dm355_leopard,		0);
86		DEBUG_LL_DAVINCI(davinci_dm6467_evm,	0);
87		DEBUG_LL_DAVINCI(davinci_dm365_evm,	0);
88
89		/* DA8xx boards */
90		DEBUG_LL_DA8XX(davinci_da830_evm,	2);
91		DEBUG_LL_DA8XX(davinci_da850_evm,	2);
92		DEBUG_LL_DA8XX(mityomapl138,		1);
93		DEBUG_LL_DA8XX(omapl138_hawkboard,	2);
94	} while (0);
95}
96
97#define arch_decomp_setup()	__arch_decomp_setup(arch_id)
98