Current File : //usr/src/linux-headers-5.15.0-43/arch/alpha/include/asm/floppy.h
/*
* 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,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) ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE;
if (bus_addr
&& (addr != prev_addr || size != prev_size || dir != prev_dir)) {
/* different from last time -- unmap prev */
pci_unmap_single(isa_bridge, bus_addr, prev_size, prev_dir);
bus_addr = 0;
}
if (!bus_addr) /* need to map it */
bus_addr = pci_map_single(isa_bridge, 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 */
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