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/*
* Deskstation Tyne specific C parts
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1994, 1995 by Ralf Baechle
*/
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <asm/bootinfo.h>
#include <asm/cachectl.h>
#include <asm/dma.h>
#include <asm/io.h>
/*
* How to access the FDC's registers.
*/
unsigned char deskstation_tyne_fd_inb(unsigned int port)
{
return inb_p(port);
}
void deskstation_tyne_fd_outb(unsigned char value, unsigned int port)
{
outb_p(value, port);
}
/*
* How to access the floppy DMA functions.
*/
void deskstation_tyne_fd_enable_dma(void)
{
enable_dma(FLOPPY_DMA);
}
void deskstation_tyne_fd_disable_dma(void)
{
disable_dma(FLOPPY_DMA);
}
int deskstation_tyne_fd_request_dma(void)
{
return request_dma(FLOPPY_DMA, "floppy");
}
void deskstation_tyne_fd_free_dma(void)
{
free_dma(FLOPPY_DMA);
}
void deskstation_tyne_fd_clear_dma_ff(void)
{
clear_dma_ff(FLOPPY_DMA);
}
int deskstation_tyne_fd_set_dma_mode(char mode)
{
return set_dma_mode(FLOPPY_DMA, mode);
}
void deskstation_tyne_fd_set_dma_addr(unsigned int a)
{
set_dma_addr(FLOPPY_DMA, addr);
}
void deskstation_tyne_fd_set_dma_count(unsigned int count)
{
set_dma_count(FLOPPY_DMA, count);
}
int deskstation_tyne_fd_get_dma_residue(void)
{
return get_dma_residue(FLOPPY_DMA);
}
void deskstation_tyne_fd_enable_irq(void)
{
enable_irq(FLOPPY_IRQ);
}
void deskstation_tyne_fd_disable_irq(void)
{
disable_irq(FLOPPY_IRQ);
}
void deskstation_tyne_fd_cacheflush(unsigned char *addr, unsigned int)
{
sys_cacheflush((void *)addr, size, DCACHE);
}
/*
* Tiny Tyne DMA buffer allocator
*
* Untested for a long time and changed again and again ...
* Sorry, but no hardware to test ...
*/
static unsigned long allocated;
/*
* Not very sophisticated, but should suffice for now...
*/
unsigned long deskstation_tyne_dma_alloc(size_t size)
{
unsigned long ret = allocated;
allocated += size;
if (allocated > boot_info.dma_cache_size)
ret = -1;
return ret;
}
void deskstation_tyne_dma_init(void)
{
if (boot_info.machtype != MACH_DESKSTATION_TYNE)
return;
allocated = 0;
printk ("Deskstation Tyne DMA (%luk) buffer initialized.\n",
boot_info.dma_cache_size >> 10);
}
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