835c34a168
Since the x86 merge, lots of files that referenced their own filenames are no longer correct. Rather than keep them up to date, just delete them, as they add no real value. Additionally: - fix up comment formatting in scx200_32.c - Remove a credit from myself in setup_64.c from a time when we had no SCM - remove longwinded history from tsc_32.c which can be figured out from git. Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
73 lines
1.5 KiB
C
73 lines
1.5 KiB
C
/*
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* 8237A DMA controller suspend functions.
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*
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* Written by Pierre Ossman, 2005.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*/
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#include <linux/init.h>
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#include <linux/sysdev.h>
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#include <asm/dma.h>
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/*
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* This module just handles suspend/resume issues with the
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* 8237A DMA controller (used for ISA and LPC).
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* Allocation is handled in kernel/dma.c and normal usage is
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* in asm/dma.h.
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*/
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static int i8237A_resume(struct sys_device *dev)
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{
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unsigned long flags;
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int i;
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flags = claim_dma_lock();
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dma_outb(DMA1_RESET_REG, 0);
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dma_outb(DMA2_RESET_REG, 0);
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for (i = 0;i < 8;i++) {
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set_dma_addr(i, 0x000000);
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/* DMA count is a bit weird so this is not 0 */
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set_dma_count(i, 1);
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}
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/* Enable cascade DMA or channel 0-3 won't work */
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enable_dma(4);
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release_dma_lock(flags);
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return 0;
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}
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static int i8237A_suspend(struct sys_device *dev, pm_message_t state)
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{
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return 0;
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}
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static struct sysdev_class i8237_sysdev_class = {
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set_kset_name("i8237"),
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.suspend = i8237A_suspend,
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.resume = i8237A_resume,
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};
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static struct sys_device device_i8237A = {
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.id = 0,
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.cls = &i8237_sysdev_class,
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};
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static int __init i8237A_init_sysfs(void)
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{
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int error = sysdev_class_register(&i8237_sysdev_class);
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if (!error)
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error = sysdev_register(&device_i8237A);
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return error;
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}
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device_initcall(i8237A_init_sysfs);
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