/* Support for the latches on the old Archimedes which control the floppy,
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/* Support for the latches on the old Archimedes which control the floppy,
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* hard disc and printer
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* hard disc and printer
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*
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*
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* (c) David Alan Gilbert 1995/1996
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* (c) David Alan Gilbert 1995/1996
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*/
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*/
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#include <linux/kernel.h>
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#include <linux/kernel.h>
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#include <asm/io.h>
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#include <asm/io.h>
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#include <asm/hardware.h>
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#include <asm/hardware.h>
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#ifdef LATCHAADDR
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#ifdef LATCHAADDR
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/*
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/*
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* They are static so that everyone who accesses them has to go through here
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* They are static so that everyone who accesses them has to go through here
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*/
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*/
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static unsigned char LatchACopy;
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static unsigned char LatchACopy;
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/* newval=(oldval & ~mask)|newdata */
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/* newval=(oldval & ~mask)|newdata */
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void oldlatch_aupdate(unsigned char mask,unsigned char newdata)
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void oldlatch_aupdate(unsigned char mask,unsigned char newdata)
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{
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{
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LatchACopy=(LatchACopy & ~mask)|newdata;
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LatchACopy=(LatchACopy & ~mask)|newdata;
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outb(LatchACopy, LATCHAADDR);
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outb(LatchACopy, LATCHAADDR);
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#ifdef DEBUG
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#ifdef DEBUG
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printk("oldlatch_A:0x%2x\n",LatchACopy);
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printk("oldlatch_A:0x%2x\n",LatchACopy);
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#endif
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#endif
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}
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}
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#endif
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#endif
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#ifdef LATCHBADDR
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#ifdef LATCHBADDR
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static unsigned char LatchBCopy;
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static unsigned char LatchBCopy;
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/* newval=(oldval & ~mask)|newdata */
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/* newval=(oldval & ~mask)|newdata */
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void oldlatch_bupdate(unsigned char mask,unsigned char newdata)
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void oldlatch_bupdate(unsigned char mask,unsigned char newdata)
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{
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{
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LatchBCopy=(LatchBCopy & ~mask)|newdata;
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LatchBCopy=(LatchBCopy & ~mask)|newdata;
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outb(LatchBCopy, LATCHBADDR);
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outb(LatchBCopy, LATCHBADDR);
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#ifdef DEBUG
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#ifdef DEBUG
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printk("oldlatch_B:0x%2x\n",LatchBCopy);
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printk("oldlatch_B:0x%2x\n",LatchBCopy);
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#endif
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#endif
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}
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}
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#endif
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#endif
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void oldlatch_init(void)
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void oldlatch_init(void)
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{
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{
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printk("oldlatch: init\n");
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printk("oldlatch: init\n");
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#ifdef LATCHAADDR
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#ifdef LATCHAADDR
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oldlatch_aupdate(0xff,0xff);
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oldlatch_aupdate(0xff,0xff);
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#endif
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#endif
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#ifdef LATCHBADDR
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#ifdef LATCHBADDR
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oldlatch_bupdate(0xff,0x8); /* Thats no FDC reset...*/
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oldlatch_bupdate(0xff,0x8); /* Thats no FDC reset...*/
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#endif
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#endif
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return ;
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return ;
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}
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}
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