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
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
|
/*
* cmu.c, Clock Mask Unit routines for the NEC VR4100 series.
*
* Copyright (C) 2001-2002 MontaVista Software Inc.
* Author: Yoichi Yuasa <yyuasa@mvista.com or source@mvista.com>
* Copuright (C) 2003-2005 Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
*
* 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
*/
/*
* Changes:
* MontaVista Software Inc. <yyuasa@mvista.com> or <source@mvista.com>
* - New creation, NEC VR4122 and VR4131 are supported.
* - Added support for NEC VR4111 and VR4121.
*
* Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
* - Added support for NEC VR4133.
*/
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/module.h>
#include <linux/smp.h>
#include <linux/spinlock.h>
#include <linux/types.h>
#include <asm/cpu.h>
#include <asm/io.h>
#include <asm/vr41xx/vr41xx.h>
#define CMU_TYPE1_BASE 0x0b000060UL
#define CMU_TYPE1_SIZE 0x4
#define CMU_TYPE2_BASE 0x0f000060UL
#define CMU_TYPE2_SIZE 0x4
#define CMU_TYPE3_BASE 0x0f000060UL
#define CMU_TYPE3_SIZE 0x8
#define CMUCLKMSK 0x0
#define MSKPIU 0x0001
#define MSKSIU 0x0002
#define MSKAIU 0x0004
#define MSKKIU 0x0008
#define MSKFIR 0x0010
#define MSKDSIU 0x0820
#define MSKCSI 0x0040
#define MSKPCIU 0x0080
#define MSKSSIU 0x0100
#define MSKSHSP 0x0200
#define MSKFFIR 0x0400
#define MSKSCSI 0x1000
#define MSKPPCIU 0x2000
#define CMUCLKMSK2 0x4
#define MSKCEU 0x0001
#define MSKMAC0 0x0002
#define MSKMAC1 0x0004
static void __iomem *cmu_base;
static uint16_t cmuclkmsk, cmuclkmsk2;
static DEFINE_SPINLOCK(cmu_lock);
#define cmu_read(offset) readw(cmu_base + (offset))
#define cmu_write(offset, value) writew((value), cmu_base + (offset))
void vr41xx_supply_clock(vr41xx_clock_t clock)
{
spin_lock_irq(&cmu_lock);
switch (clock) {
case PIU_CLOCK:
cmuclkmsk |= MSKPIU;
break;
case SIU_CLOCK:
cmuclkmsk |= MSKSIU | MSKSSIU;
break;
case AIU_CLOCK:
cmuclkmsk |= MSKAIU;
break;
case KIU_CLOCK:
cmuclkmsk |= MSKKIU;
break;
case FIR_CLOCK:
cmuclkmsk |= MSKFIR | MSKFFIR;
break;
case DSIU_CLOCK:
if (current_cpu_data.cputype == CPU_VR4111 ||
current_cpu_data.cputype == CPU_VR4121)
cmuclkmsk |= MSKDSIU;
else
cmuclkmsk |= MSKSIU | MSKDSIU;
break;
case CSI_CLOCK:
cmuclkmsk |= MSKCSI | MSKSCSI;
break;
case PCIU_CLOCK:
cmuclkmsk |= MSKPCIU;
break;
case HSP_CLOCK:
cmuclkmsk |= MSKSHSP;
break;
case PCI_CLOCK:
cmuclkmsk |= MSKPPCIU;
break;
case CEU_CLOCK:
cmuclkmsk2 |= MSKCEU;
break;
case ETHER0_CLOCK:
cmuclkmsk2 |= MSKMAC0;
break;
case ETHER1_CLOCK:
cmuclkmsk2 |= MSKMAC1;
break;
default:
break;
}
if (clock == CEU_CLOCK || clock == ETHER0_CLOCK ||
clock == ETHER1_CLOCK)
cmu_write(CMUCLKMSK2, cmuclkmsk2);
else
cmu_write(CMUCLKMSK, cmuclkmsk);
spin_unlock_irq(&cmu_lock);
}
EXPORT_SYMBOL_GPL(vr41xx_supply_clock);
void vr41xx_mask_clock(vr41xx_clock_t clock)
{
spin_lock_irq(&cmu_lock);
switch (clock) {
case PIU_CLOCK:
cmuclkmsk &= ~MSKPIU;
break;
case SIU_CLOCK:
if (current_cpu_data.cputype == CPU_VR4111 ||
current_cpu_data.cputype == CPU_VR4121) {
cmuclkmsk &= ~(MSKSIU | MSKSSIU);
} else {
if (cmuclkmsk & MSKDSIU)
cmuclkmsk &= ~MSKSSIU;
else
cmuclkmsk &= ~(MSKSIU | MSKSSIU);
}
break;
case AIU_CLOCK:
cmuclkmsk &= ~MSKAIU;
break;
case KIU_CLOCK:
cmuclkmsk &= ~MSKKIU;
break;
case FIR_CLOCK:
cmuclkmsk &= ~(MSKFIR | MSKFFIR);
break;
case DSIU_CLOCK:
if (current_cpu_data.cputype == CPU_VR4111 ||
current_cpu_data.cputype == CPU_VR4121) {
cmuclkmsk &= ~MSKDSIU;
} else {
if (cmuclkmsk & MSKSSIU)
cmuclkmsk &= ~MSKDSIU;
else
cmuclkmsk &= ~(MSKSIU | MSKDSIU);
}
break;
case CSI_CLOCK:
cmuclkmsk &= ~(MSKCSI | MSKSCSI);
break;
case PCIU_CLOCK:
cmuclkmsk &= ~MSKPCIU;
break;
case HSP_CLOCK:
cmuclkmsk &= ~MSKSHSP;
break;
case PCI_CLOCK:
cmuclkmsk &= ~MSKPPCIU;
break;
case CEU_CLOCK:
cmuclkmsk2 &= ~MSKCEU;
break;
case ETHER0_CLOCK:
cmuclkmsk2 &= ~MSKMAC0;
break;
case ETHER1_CLOCK:
cmuclkmsk2 &= ~MSKMAC1;
break;
default:
break;
}
if (clock == CEU_CLOCK || clock == ETHER0_CLOCK ||
clock == ETHER1_CLOCK)
cmu_write(CMUCLKMSK2, cmuclkmsk2);
else
cmu_write(CMUCLKMSK, cmuclkmsk);
spin_unlock_irq(&cmu_lock);
}
EXPORT_SYMBOL_GPL(vr41xx_mask_clock);
static int __init vr41xx_cmu_init(void)
{
unsigned long start, size;
switch (current_cpu_data.cputype) {
case CPU_VR4111:
case CPU_VR4121:
start = CMU_TYPE1_BASE;
size = CMU_TYPE1_SIZE;
break;
case CPU_VR4122:
case CPU_VR4131:
start = CMU_TYPE2_BASE;
size = CMU_TYPE2_SIZE;
break;
case CPU_VR4133:
start = CMU_TYPE3_BASE;
size = CMU_TYPE3_SIZE;
break;
default:
panic("Unexpected CPU of NEC VR4100 series");
break;
}
if (request_mem_region(start, size, "CMU") == NULL)
return -EBUSY;
cmu_base = ioremap(start, size);
if (cmu_base == NULL) {
release_mem_region(start, size);
return -EBUSY;
}
cmuclkmsk = cmu_read(CMUCLKMSK);
if (current_cpu_data.cputype == CPU_VR4133)
cmuclkmsk2 = cmu_read(CMUCLKMSK2);
spin_lock_init(&cmu_lock);
return 0;
}
core_initcall(vr41xx_cmu_init);
|
