cmu.c
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上传日期:2013-04-10
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文件大小:3k
- /*
- * FILE NAME
- * arch/mips/vr41xx/common/cmu.c
- *
- * BRIEF MODULE DESCRIPTION
- * Clock Mask Unit routines for the NEC VR4100 series.
- *
- * Author: Yoichi Yuasa
- * yyuasa@mvista.com or source@mvista.com
- *
- * Copyright 2001,2002 MontaVista Software Inc.
- *
- * 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
- * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * 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.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- /*
- * Changes:
- * MontaVista Software Inc. <yyuasa@mvista.com> or <source@mvista.com>
- * - Added support for NEC VR4111 and VR4121.
- *
- * MontaVista Software Inc. <yyuasa@mvista.com> or <source@mvista.com>
- * - New creation, NEC VR4122 and VR4131 are supported.
- */
- #include <linux/init.h>
- #include <linux/types.h>
- #include <asm/cpu.h>
- #include <asm/io.h>
- #define VR4111_CMUCLKMSK KSEG1ADDR(0x0b000060)
- #define VR4122_CMUCLKMSK KSEG1ADDR(0x0f000060)
- static u32 vr41xx_cmu_base;
- static u16 cmuclkmsk;
- #define write_cmu(mask) writew((mask), vr41xx_cmu_base)
- void vr41xx_clock_supply(u16 mask)
- {
- cmuclkmsk |= mask;
- write_cmu(cmuclkmsk);
- }
- void vr41xx_clock_mask(u16 mask)
- {
- cmuclkmsk &= ~mask;
- write_cmu(cmuclkmsk);
- }
- void __init vr41xx_cmu_init(u16 mask)
- {
- switch (mips_cpu.cputype) {
- case CPU_VR4111:
- case CPU_VR4121:
- vr41xx_cmu_base = VR4111_CMUCLKMSK;
- break;
- case CPU_VR4122:
- case CPU_VR4131:
- vr41xx_cmu_base = VR4122_CMUCLKMSK;
- break;
- default:
- panic("Unexpected CPU of NEC VR4100 series");
- break;
- }
- cmuclkmsk = mask;
- }