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/*
* Architecture specific parts of the Floppy driver
*
* 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) 1995
*/
#ifndef __ASM_MIPS_FLOPPY_H
#define __ASM_MIPS_FLOPPY_H
#include <linux/config.h>
#include <asm/bootinfo.h>
#include <asm/jazz.h>
#include <asm/jazzdma.h>
#include <asm/mipsconfig.h>
#include <asm/vector.h>
#define fd_inb(port) feature->fd_inb(port)
#define fd_outb(value,port) feature->fd_outb(value,port)
#define fd_enable_dma() feature->fd_enable_dma()
#define fd_disable_dma() feature->fd_disable_dma()
#define fd_request_dma() feature->fd_request_dma()
#define fd_free_dma() feature->fd_free_dma()
#define fd_clear_dma_ff() feature->fd_clear_dma_ff()
#define fd_set_dma_mode(mode) feature->fd_set_dma_mode(mode)
#define fd_set_dma_addr(addr) feature->fd_set_dma_addr(virt_to_bus(addr))
#define fd_set_dma_count(count) feature->fd_set_dma_count(count)
#define fd_get_dma_residue() feature->fd_get_dma_residue()
#define fd_enable_irq() feature->fd_enable_irq()
#define fd_disable_irq() feature->fd_disable_irq()
#define fd_request_irq() request_irq(FLOPPY_IRQ, floppy_interrupt, \
SA_INTERRUPT|SA_SAMPLE_RANDOM, \
"floppy", NULL)
#define fd_free_irq() free_irq(FLOPPY_IRQ, NULL);
#define MAX_BUFFER_SECTORS 24
/* Pure 2^n version of get_order */
extern __inline__ int __get_order(unsigned long size)
{
int order;
size = (size-1) >> (PAGE_SHIFT-1);
order = -1;
do {
size >>= 1;
order++;
} while (size);
return order;
}
extern __inline__ unsigned long mips_dma_mem_alloc(unsigned long size)
{
int order = __get_order(size);
unsigned long mem;
mem = __get_dma_pages(GFP_KERNEL,order);
if(!mem)
return 0;
#ifdef CONFIG_MIPS_JAZZ
if (mips_machgroup == MACH_GROUP_JAZZ)
vdma_alloc(PHYSADDR(mem), size);
#endif
return mem;
}
extern __inline__ void mips_dma_mem_free(unsigned long addr, unsigned long size)
{
#ifdef CONFIG_MIPS_JAZZ
if (mips_machgroup == MACH_GROUP_JAZZ)
vdma_free(vdma_phys2log(PHYSADDR(addr)));
#endif
free_pages(addr, __get_order(size));
}
#define fd_dma_mem_alloc(size) mips_dma_mem_alloc(size)
#define fd_dma_mem_free(mem,size) mips_dma_mem_free(mem,size)
/*
* And on Mips's the CMOS info fails also ...
*
* FIXME: This information should come from the ARC configuration tree
* or whereever a particular machine has stored this ...
*/
#define FLOPPY0_TYPE 4 /* this is wrong for the Olli M700, but who cares... */
#define FLOPPY1_TYPE 0
#define FDC1 ((mips_machgroup == MACH_GROUP_JAZZ) ? \
JAZZ_FDC_BASE : 0x3f0)
static int FDC2=-1;
#define N_FDC 1 /* do you *really* want a second controller? */
#define N_DRIVE 8
/*
* The DMA channel used by the floppy controller cannot access data at
* addresses >= 16MB
*
* Went back to the 1MB limit, as some people had problems with the floppy
* driver otherwise. It doesn't matter much for performance anyway, as most
* floppy accesses go through the track buffer.
*
* On MIPSes using vdma, this actually means that *all* transfers go thru
* the * track buffer since 0x1000000 is always smaller than KSEG0/1.
* Actually this needs to be a bit more complicated since the so much different
* hardware available with MIPS CPUs ...
*/
#define CROSS_64KB(a,s) ((unsigned long)(a)/K_64 != ((unsigned long)(a) + (s) - 1) / K_64)
#endif /* __ASM_MIPS_FLOPPY_H */
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