Viewing file:  floppy-jazz.c (2.98 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* $Id: floppy-jazz.c,v 1.2 1998/10/18 13:18:25 tsbogend Exp $
*
* 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.
*
* Low-level floppy stuff for Jazz family machines.
*
* Copyright (C) 1998 by Ralf Baechle
*/
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/linkage.h>
#include <linux/types.h>
#include <linux/mm.h>
#include <asm/addrspace.h>
#include <asm/jazz.h>
#include <asm/jazzdma.h>
#include <asm/keyboard.h>
#include <asm/pgtable.h>
#include <asm/floppy.h>
static unsigned char jazz_fd_inb(unsigned int port)
{
unsigned char c;
c = *(volatile unsigned char *) port;
udelay(1);
return c;
}
static void jazz_fd_outb(unsigned char value, unsigned int port)
{
*(volatile unsigned char *) port = value;
}
/*
* How to access the floppy DMA functions.
*/
static void jazz_fd_enable_dma(int channel)
{
vdma_enable(JAZZ_FLOPPY_DMA);
}
static void jazz_fd_disable_dma(int channel)
{
vdma_disable(JAZZ_FLOPPY_DMA);
}
static int jazz_fd_request_dma(int channel)
{
return 0;
}
static void jazz_fd_free_dma(int channel)
{
}
static void jazz_fd_clear_dma_ff(int channel)
{
}
static void jazz_fd_set_dma_mode(int channel, char mode)
{
vdma_set_mode(JAZZ_FLOPPY_DMA, mode);
}
static void jazz_fd_set_dma_addr(int channel, unsigned int a)
{
vdma_set_addr(JAZZ_FLOPPY_DMA, vdma_phys2log(PHYSADDR(a)));
}
static void jazz_fd_set_dma_count(int channel, unsigned int count)
{
vdma_set_count(JAZZ_FLOPPY_DMA, count);
}
static int jazz_fd_get_dma_residue(int channel)
{
return vdma_get_residue(JAZZ_FLOPPY_DMA);
}
static void jazz_fd_enable_irq(int irq)
{
}
static void jazz_fd_disable_irq(int irq)
{
}
static unsigned long jazz_fd_getfdaddr1(void)
{
return JAZZ_FDC_BASE;
}
static unsigned long jazz_fd_dma_mem_alloc(unsigned long size)
{
unsigned long mem;
mem = __get_dma_pages(GFP_KERNEL, get_order(size));
if(!mem)
return 0;
vdma_alloc(PHYSADDR(mem), size); /* XXX error checking */
return mem;
}
static void jazz_fd_dma_mem_free(unsigned long addr,
unsigned long size)
{
vdma_free(vdma_phys2log(PHYSADDR(addr)));
free_pages(addr, get_order(size));
}
static unsigned long jazz_fd_drive_type(unsigned long n)
{
/* XXX This is wrong for machines with ED 2.88mb disk drives like the
Olivetti M700. Anyway, we should suck this from the ARC
firmware. */
if (n == 0)
return 4; /* 3,5", 1.44mb */
return 0;
}
struct fd_ops jazz_fd_ops = {
/*
* How to access the floppy controller's ports
*/
jazz_fd_inb,
jazz_fd_outb,
/*
* How to access the floppy DMA functions.
*/
jazz_fd_enable_dma,
jazz_fd_disable_dma,
jazz_fd_request_dma,
jazz_fd_free_dma,
jazz_fd_clear_dma_ff,
jazz_fd_set_dma_mode,
jazz_fd_set_dma_addr,
jazz_fd_set_dma_count,
jazz_fd_get_dma_residue,
jazz_fd_enable_irq,
jazz_fd_disable_irq,
jazz_fd_getfdaddr1,
jazz_fd_dma_mem_alloc,
jazz_fd_dma_mem_free,
jazz_fd_drive_type
};
|