/*
* 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 = 0 x3f0;
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 64 k 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) & ~0 xffffUL;
}
#define EXTRA_FLOPPY_PARAMS
#endif /* __ASM_ALPHA_FLOPPY_H */
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