115 lines
3.1 KiB
C
115 lines
3.1 KiB
C
|
/*
|
||
|
|
* 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_ALPHA_FLOPPY_H
|
||
|
|
#define __ASM_ALPHA_FLOPPY_H
|
||
|
|
|
||
|
|
|
||
|
|
#define fd_inb(base, reg) inb_p((base) + (reg))
|
||
|
|
#define fd_outb(value, base, reg) outb_p(value, (base) + (reg))
|
||
|
|
|
||
|
|
#define fd_enable_dma() enable_dma(FLOPPY_DMA)
|
||
|
|
#define fd_disable_dma() disable_dma(FLOPPY_DMA)
|
||
|
|
#define fd_request_dma() request_dma(FLOPPY_DMA,"floppy")
|
||
|
|
#define fd_free_dma() free_dma(FLOPPY_DMA)
|
||
|
|
#define fd_clear_dma_ff() clear_dma_ff(FLOPPY_DMA)
|
||
|
|
#define fd_set_dma_mode(mode) set_dma_mode(FLOPPY_DMA,mode)
|
||
|
|
#define fd_set_dma_addr(addr) set_dma_addr(FLOPPY_DMA,isa_virt_to_bus(addr))
|
||
|
|
#define fd_set_dma_count(count) set_dma_count(FLOPPY_DMA,count)
|
||
|
|
#define fd_enable_irq() enable_irq(FLOPPY_IRQ)
|
||
|
|
#define fd_disable_irq() disable_irq(FLOPPY_IRQ)
|
||
|
|
#define fd_request_irq() request_irq(FLOPPY_IRQ, floppy_interrupt,\
|
||
|
|
0, "floppy", NULL)
|
||
|
|
#define fd_free_irq() free_irq(FLOPPY_IRQ, NULL)
|
||
|
|
|
||
|
|
#ifdef CONFIG_PCI
|
||
|
|
|
||
|
|
#include <linux/pci.h>
|
||
|
|
|
||
|
|
#define fd_dma_setup(addr,size,mode,io) alpha_fd_dma_setup(addr,size,mode,io)
|
||
|
|
|
||
|
|
static __inline__ int
|
||
|
|
alpha_fd_dma_setup(char *addr, unsigned long size, int mode, int io)
|
||
|
|
{
|
||
|
|
static unsigned long prev_size;
|
||
|
|
static dma_addr_t bus_addr = 0;
|
||
|
|
static char *prev_addr;
|
||
|
|
static int prev_dir;
|
||
|
|
int dir;
|
||
|
|
|
||
|
|
dir = (mode != DMA_MODE_READ) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
|
||
|
|
|
||
|
|
if (bus_addr
|
||
|
|
&& (addr != prev_addr || size != prev_size || dir != prev_dir)) {
|
||
|
|
/* different from last time -- unmap prev */
|
||
|
|
dma_unmap_single(&isa_bridge->dev, bus_addr, prev_size,
|
||
|
|
prev_dir);
|
||
|
|
bus_addr = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!bus_addr) /* need to map it */
|
||
|
|
bus_addr = dma_map_single(&isa_bridge->dev, addr, size, dir);
|
||
|
|
|
||
|
|
/* remember this one as prev */
|
||
|
|
prev_addr = addr;
|
||
|
|
prev_size = size;
|
||
|
|
prev_dir = dir;
|
||
|
|
|
||
|
|
fd_clear_dma_ff();
|
||
|
|
fd_set_dma_mode(mode);
|
||
|
|
set_dma_addr(FLOPPY_DMA, bus_addr);
|
||
|
|
fd_set_dma_count(size);
|
||
|
|
virtual_dma_port = io;
|
||
|
|
fd_enable_dma();
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* CONFIG_PCI */
|
||
|
|
|
||
|
|
__inline__ void virtual_dma_init(void)
|
||
|
|
{
|
||
|
|
/* Nothing to do on an Alpha */
|
||
|
|
}
|
||
|
|
|
||
|
|
static int FDC1 = 0x3f0;
|
||
|
|
static int FDC2 = -1;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Again, the CMOS information doesn't work on the alpha..
|
||
|
|
*/
|
||
|
|
#define FLOPPY0_TYPE 6
|
||
|
|
#define FLOPPY1_TYPE 0
|
||
|
|
|
||
|
|
#define N_FDC 2
|
||
|
|
#define N_DRIVE 8
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Most Alphas have no problems with floppy DMA crossing 64k borders,
|
||
|
|
* except for certain ones, like XL and RUFFIAN.
|
||
|
|
*
|
||
|
|
* However, the test is simple and fast, and this *is* floppy, after all,
|
||
|
|
* so we do it for all platforms, just to make sure.
|
||
|
|
*
|
||
|
|
* This is advantageous in other circumstances as well, as in moving
|
||
|
|
* about the PCI DMA windows and forcing the floppy to start doing
|
||
|
|
* scatter-gather when it never had before, and there *is* a problem
|
||
|
|
* on that platform... ;-}
|
||
|
|
*/
|
||
|
|
|
||
|
|
static inline unsigned long CROSS_64KB(void *a, unsigned long s)
|
||
|
|
{
|
||
|
|
unsigned long p = (unsigned long)a;
|
||
|
|
return ((p + s - 1) ^ p) & ~0xffffUL;
|
||
|
|
}
|
||
|
|
|
||
|
|
#define EXTRA_FLOPPY_PARAMS
|
||
|
|
|
||
|
|
#endif /* __ASM_ALPHA_FLOPPY_H */
|