2 * cmu.c, Clock Mask Unit routines for the NEC VR4100 series.
4 * Copyright (C) 2001-2002 MontaVista Software Inc.
5 * Author: Yoichi Yuasa <yyuasa@mvista.com or source@mvista.com>
6 * Copuright (C) 2003-2005 Yoichi Yuasa <yuasa@hh.iij4u.or.jp>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 * MontaVista Software Inc. <yyuasa@mvista.com> or <source@mvista.com>
25 * - New creation, NEC VR4122 and VR4131 are supported.
26 * - Added support for NEC VR4111 and VR4121.
28 * Yoichi Yuasa <yuasa@hh.iij4u.or.jp>
29 * - Added support for NEC VR4133.
31 #include <linux/init.h>
32 #include <linux/ioport.h>
33 #include <linux/module.h>
34 #include <linux/smp.h>
35 #include <linux/spinlock.h>
36 #include <linux/types.h>
40 #include <asm/vr41xx/vr41xx.h>
42 #define CMU_TYPE1_BASE 0x0b000060UL
43 #define CMU_TYPE1_SIZE 0x4
45 #define CMU_TYPE2_BASE 0x0f000060UL
46 #define CMU_TYPE2_SIZE 0x4
48 #define CMU_TYPE3_BASE 0x0f000060UL
49 #define CMU_TYPE3_SIZE 0x8
57 #define MSKDSIU 0x0820
59 #define MSKPCIU 0x0080
60 #define MSKSSIU 0x0100
61 #define MSKSHSP 0x0200
62 #define MSKFFIR 0x0400
63 #define MSKSCSI 0x1000
64 #define MSKPPCIU 0x2000
65 #define CMUCLKMSK2 0x4
67 #define MSKMAC0 0x0002
68 #define MSKMAC1 0x0004
70 static void __iomem *cmu_base;
71 static uint16_t cmuclkmsk, cmuclkmsk2;
72 static spinlock_t cmu_lock;
74 #define cmu_read(offset) readw(cmu_base + (offset))
75 #define cmu_write(offset, value) writew((value), cmu_base + (offset))
77 void vr41xx_supply_clock(vr41xx_clock_t clock)
79 spin_lock_irq(&cmu_lock);
86 cmuclkmsk |= MSKSIU | MSKSSIU;
95 cmuclkmsk |= MSKFIR | MSKFFIR;
98 if (current_cpu_data.cputype == CPU_VR4111 ||
99 current_cpu_data.cputype == CPU_VR4121)
100 cmuclkmsk |= MSKDSIU;
102 cmuclkmsk |= MSKSIU | MSKDSIU;
105 cmuclkmsk |= MSKCSI | MSKSCSI;
108 cmuclkmsk |= MSKPCIU;
111 cmuclkmsk |= MSKSHSP;
114 cmuclkmsk |= MSKPPCIU;
117 cmuclkmsk2 |= MSKCEU;
120 cmuclkmsk2 |= MSKMAC0;
123 cmuclkmsk2 |= MSKMAC1;
129 if (clock == CEU_CLOCK || clock == ETHER0_CLOCK ||
130 clock == ETHER1_CLOCK)
131 cmu_write(CMUCLKMSK2, cmuclkmsk2);
133 cmu_write(CMUCLKMSK, cmuclkmsk);
135 spin_unlock_irq(&cmu_lock);
138 EXPORT_SYMBOL_GPL(vr41xx_supply_clock);
140 void vr41xx_mask_clock(vr41xx_clock_t clock)
142 spin_lock_irq(&cmu_lock);
146 cmuclkmsk &= ~MSKPIU;
149 if (current_cpu_data.cputype == CPU_VR4111 ||
150 current_cpu_data.cputype == CPU_VR4121) {
151 cmuclkmsk &= ~(MSKSIU | MSKSSIU);
153 if (cmuclkmsk & MSKDSIU)
154 cmuclkmsk &= ~MSKSSIU;
156 cmuclkmsk &= ~(MSKSIU | MSKSSIU);
160 cmuclkmsk &= ~MSKAIU;
163 cmuclkmsk &= ~MSKKIU;
166 cmuclkmsk &= ~(MSKFIR | MSKFFIR);
169 if (current_cpu_data.cputype == CPU_VR4111 ||
170 current_cpu_data.cputype == CPU_VR4121) {
171 cmuclkmsk &= ~MSKDSIU;
173 if (cmuclkmsk & MSKSSIU)
174 cmuclkmsk &= ~MSKDSIU;
176 cmuclkmsk &= ~(MSKSIU | MSKDSIU);
180 cmuclkmsk &= ~(MSKCSI | MSKSCSI);
183 cmuclkmsk &= ~MSKPCIU;
186 cmuclkmsk &= ~MSKSHSP;
189 cmuclkmsk &= ~MSKPPCIU;
192 cmuclkmsk2 &= ~MSKCEU;
195 cmuclkmsk2 &= ~MSKMAC0;
198 cmuclkmsk2 &= ~MSKMAC1;
204 if (clock == CEU_CLOCK || clock == ETHER0_CLOCK ||
205 clock == ETHER1_CLOCK)
206 cmu_write(CMUCLKMSK2, cmuclkmsk2);
208 cmu_write(CMUCLKMSK, cmuclkmsk);
210 spin_unlock_irq(&cmu_lock);
213 EXPORT_SYMBOL_GPL(vr41xx_mask_clock);
215 static int __init vr41xx_cmu_init(void)
217 unsigned long start, size;
219 switch (current_cpu_data.cputype) {
222 start = CMU_TYPE1_BASE;
223 size = CMU_TYPE1_SIZE;
227 start = CMU_TYPE2_BASE;
228 size = CMU_TYPE2_SIZE;
231 start = CMU_TYPE3_BASE;
232 size = CMU_TYPE3_SIZE;
235 panic("Unexpected CPU of NEC VR4100 series");
239 if (request_mem_region(start, size, "CMU") == NULL)
242 cmu_base = ioremap(start, size);
243 if (cmu_base == NULL) {
244 release_mem_region(start, size);
248 cmuclkmsk = cmu_read(CMUCLKMSK);
249 if (current_cpu_data.cputype == CPU_VR4133)
250 cmuclkmsk2 = cmu_read(CMUCLKMSK2);
252 spin_lock_init(&cmu_lock);
257 core_initcall(vr41xx_cmu_init);