aboutsummaryrefslogtreecommitdiff
path: root/arch/arm/mach-at91/include/mach/uncompress.h
blob: 97ad68a826f8559595d133104fa3fd53f891b4cd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
/*
 * arch/arm/mach-at91/include/mach/uncompress.h
 *
 * Copyright (C) 2003 SAN People
 * Copyright (C) 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef __ASM_ARCH_UNCOMPRESS_H
#define __ASM_ARCH_UNCOMPRESS_H

#include <linux/io.h>
#include <linux/atmel_serial.h>
#include <mach/hardware.h>

#include <mach/at91_dbgu.h>
#include <mach/cpu.h>

void __iomem *at91_uart;

#if !defined(CONFIG_ARCH_AT91X40)
static const u32 uarts_rm9200[] = {
	AT91_BASE_DBGU0,
	AT91RM9200_BASE_US0,
	AT91RM9200_BASE_US1,
	AT91RM9200_BASE_US2,
	AT91RM9200_BASE_US3,
	0,
};

static const u32 uarts_sam9260[] = {
	AT91_BASE_DBGU0,
	AT91SAM9260_BASE_US0,
	AT91SAM9260_BASE_US1,
	AT91SAM9260_BASE_US2,
	AT91SAM9260_BASE_US3,
	AT91SAM9260_BASE_US4,
	AT91SAM9260_BASE_US5,
	0,
};

static const u32 uarts_sam9261[] = {
	AT91_BASE_DBGU0,
	AT91SAM9261_BASE_US0,
	AT91SAM9261_BASE_US1,
	AT91SAM9261_BASE_US2,
	0,
};

static const u32 uarts_sam9263[] = {
	AT91_BASE_DBGU1,
	AT91SAM9263_BASE_US0,
	AT91SAM9263_BASE_US1,
	AT91SAM9263_BASE_US2,
	0,
};

static const u32 uarts_sam9g45[] = {
	AT91_BASE_DBGU1,
	AT91SAM9G45_BASE_US0,
	AT91SAM9G45_BASE_US1,
	AT91SAM9G45_BASE_US2,
	AT91SAM9G45_BASE_US3,
	0,
};

static const u32 uarts_sam9rl[] = {
	AT91_BASE_DBGU0,
	AT91SAM9RL_BASE_US0,
	AT91SAM9RL_BASE_US1,
	AT91SAM9RL_BASE_US2,
	AT91SAM9RL_BASE_US3,
	0,
};

static const u32 uarts_sam9x5[] = {
	AT91_BASE_DBGU0,
	AT91SAM9X5_BASE_USART0,
	AT91SAM9X5_BASE_USART1,
	AT91SAM9X5_BASE_USART2,
	0,
};

static inline const u32* decomp_soc_detect(void __iomem *dbgu_base)
{
	u32 cidr, socid;

	cidr = __raw_readl(dbgu_base + AT91_DBGU_CIDR);
	socid = cidr & ~AT91_CIDR_VERSION;

	switch (socid) {
	case ARCH_ID_AT91RM9200:
		return uarts_rm9200;

	case ARCH_ID_AT91SAM9G20:
	case ARCH_ID_AT91SAM9260:
		return uarts_sam9260;

	case ARCH_ID_AT91SAM9261:
		return uarts_sam9261;

	case ARCH_ID_AT91SAM9263:
		return uarts_sam9263;

	case ARCH_ID_AT91SAM9G45:
		return uarts_sam9g45;

	case ARCH_ID_AT91SAM9RL64:
		return uarts_sam9rl;

	case ARCH_ID_AT91SAM9X5:
		return uarts_sam9x5;
	}

	/* at91sam9g10 */
	if ((cidr & ~AT91_CIDR_EXT) == ARCH_ID_AT91SAM9G10) {
		return uarts_sam9261;
	}
	/* at91sam9xe */
	else if ((cidr & AT91_CIDR_ARCH) == ARCH_FAMILY_AT91SAM9XE) {
		return uarts_sam9260;
	}

	return NULL;
}

static inline void arch_decomp_setup(void)
{
	int i = 0;
	const u32* usarts;

	usarts = decomp_soc_detect((void __iomem *)AT91_BASE_DBGU0);

	if (!usarts)
		usarts = decomp_soc_detect((void __iomem *)AT91_BASE_DBGU1);
	if (!usarts) {
		at91_uart = NULL;
		return;
	}

	do {
		/* physical address */
		at91_uart = (void __iomem *)usarts[i];

		if (__raw_readl(at91_uart + ATMEL_US_BRGR))
			return;
		i++;
	} while (usarts[i]);

	at91_uart = NULL;
}
#else
static inline void arch_decomp_setup(void)
{
	at91_uart = NULL;
}
#endif

/*
 * The following code assumes the serial port has already been
 * initialized by the bootloader.  If you didn't setup a port in
 * your bootloader then nothing will appear (which might be desired).
 *
 * This does not append a newline
 */
static void putc(int c)
{
	if (!at91_uart)
		return;

	while (!(__raw_readl(at91_uart + ATMEL_US_CSR) & ATMEL_US_TXRDY))
		barrier();
	__raw_writel(c, at91_uart + ATMEL_US_THR);
}

static inline void flush(void)
{
	if (!at91_uart)
		return;

	/* wait for transmission to complete */
	while (!(__raw_readl(at91_uart + ATMEL_US_CSR) & ATMEL_US_TXEMPTY))
		barrier();
}

#define arch_decomp_wdog()

#endif