summaryrefslogtreecommitdiffstats
path: root/arch/sh/kernel/cpu/shmobile/sleep.S
blob: baf2d7d46b05ba35fe936d2788128d0c1ebe9df5 (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
/*
 * arch/sh/kernel/cpu/sh4a/sleep-sh_mobile.S
 *
 * Sleep mode and Standby modes support for SuperH Mobile
 *
 *  Copyright (C) 2009 Magnus Damm
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 */

#include <linux/sys.h>
#include <linux/errno.h>
#include <linux/linkage.h>
#include <asm/asm-offsets.h>
#include <asm/suspend.h>

/* manage self-refresh and enter standby mode.
 * this code will be copied to on-chip memory and executed from there.
 */

	.balign 	4096,0,4096
ENTRY(sh_mobile_standby)
	mov	r4, r0

	tst	#SUSP_SH_SF, r0
	bt	skip_set_sf
#ifdef CONFIG_CPU_SUBTYPE_SH7724
	/* DBSC: put memory in self-refresh mode */

	mov.l	dben_reg, r4
	mov.l	dben_data0, r1
	mov.l	r1, @r4

	mov.l	dbrfpdn0_reg, r4
	mov.l	dbrfpdn0_data0, r1
	mov.l	r1, @r4

	mov.l	dbcmdcnt_reg, r4
	mov.l	dbcmdcnt_data0, r1
	mov.l	r1, @r4

	mov.l	dbcmdcnt_reg, r4
	mov.l	dbcmdcnt_data1, r1
	mov.l	r1, @r4

	mov.l	dbrfpdn0_reg, r4
	mov.l	dbrfpdn0_data1, r1
	mov.l	r1, @r4
#else
	/* SBSC: disable power down and put in self-refresh mode */
	mov.l	1f, r4
	mov.l	2f, r1
	mov.l	@r4, r2
	or	r1, r2
	mov.l   3f, r3
	and	r3, r2
	mov.l	r2, @r4
#endif

skip_set_sf:
	tst	#SUSP_SH_SLEEP, r0
	bt	test_standby

	/* set mode to "sleep mode" */
	bra	do_sleep
	 mov	#0x00, r1

test_standby:
	tst	#SUSP_SH_STANDBY, r0
	bt	test_rstandby

	/* set mode to "software standby mode" */
	bra	do_sleep
	 mov	#0x80, r1

test_rstandby:
	tst	#SUSP_SH_RSTANDBY, r0
	bt	test_ustandby

	/* set mode to "r-standby mode" */
	bra	do_sleep
	 mov	#0x20, r1

test_ustandby:
	tst	#SUSP_SH_USTANDBY, r0
	bt	done_sleep

	/* set mode to "u-standby mode" */
	mov	#0x10, r1

	/* fall-through */

do_sleep:
	/* setup and enter selected standby mode */
	mov.l	5f, r4
	mov.l	r1, @r4
	sleep

done_sleep:
	/* reset standby mode to sleep mode */
	mov.l	5f, r4
	mov	#0x00, r1
	mov.l	r1, @r4

	tst	#SUSP_SH_SF, r0
	bt	skip_restore_sf

#ifdef CONFIG_CPU_SUBTYPE_SH7724
	/* DBSC: put memory in auto-refresh mode */

	mov.l	dbrfpdn0_reg, r4
	mov.l	dbrfpdn0_data0, r1
	mov.l	r1, @r4

	/* sleep 140 ns */
	nop
	nop
	nop
	nop

	mov.l	dbcmdcnt_reg, r4
	mov.l	dbcmdcnt_data0, r1
	mov.l	r1, @r4

	mov.l	dbcmdcnt_reg, r4
	mov.l	dbcmdcnt_data1, r1
	mov.l	r1, @r4

	mov.l	dben_reg, r4
	mov.l	dben_data1, r1
	mov.l	r1, @r4

	mov.l	dbrfpdn0_reg, r4
	mov.l	dbrfpdn0_data2, r1
	mov.l	r1, @r4
#else
	/* SBSC: set auto-refresh mode */
	mov.l	1f, r4
	mov.l	@r4, r2
	mov.l   4f, r3
	and	r3, r2
	mov.l	r2, @r4
	mov.l	6f, r4
	mov.l	7f, r1
	mov.l	8f, r2
	mov.l	@r4, r3
	mov	#-1, r4
	add	r4, r3
	or	r2, r3
	mov.l	r3, @r1
#endif
skip_restore_sf:
	rts
	 nop

	.balign 4
#ifdef CONFIG_CPU_SUBTYPE_SH7724
dben_reg:	.long	0xfd000010 /* DBEN */
dben_data0:	.long	0
dben_data1:	.long	1
dbrfpdn0_reg:	.long	0xfd000040 /* DBRFPDN0 */
dbrfpdn0_data0:	.long	0
dbrfpdn0_data1:	.long	1
dbrfpdn0_data2:	.long	0x00010000
dbcmdcnt_reg:	.long	0xfd000014 /* DBCMDCNT */
dbcmdcnt_data0:	.long	2
dbcmdcnt_data1:	.long	4
#else
1:	.long	0xfe400008 /* SDCR0 */
2:	.long	0x00000400
3:	.long	0xffff7fff
4:	.long	0xfffffbff
#endif
5:	.long	0xa4150020 /* STBCR */
6:	.long   0xfe40001c /* RTCOR */
7:	.long   0xfe400018 /* RTCNT */
8:	.long   0xa55a0000

/* interrupt vector @ 0x600 */
	.balign 	0x400,0,0x400
	.long	0xdeadbeef
	.balign 	0x200,0,0x200
	/* sh7722 will end up here in sleep mode */
	rte
	 nop
sh_mobile_standby_end:

ENTRY(sh_mobile_standby_size)
	.long sh_mobile_standby_end - sh_mobile_standby
OpenPOWER on IntegriCloud