116 lines
3.1 KiB
C
116 lines
3.1 KiB
C
/*
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* Architecture specific parts of the Floppy driver
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1995
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*/
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#ifndef __ASM_ALPHA_FLOPPY_H
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#define __ASM_ALPHA_FLOPPY_H
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#define fd_inb(port) inb_p(port)
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#define fd_outb(value,port) outb_p(value,port)
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#define fd_enable_dma() enable_dma(FLOPPY_DMA)
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#define fd_disable_dma() disable_dma(FLOPPY_DMA)
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#define fd_request_dma() request_dma(FLOPPY_DMA,"floppy")
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#define fd_free_dma() free_dma(FLOPPY_DMA)
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#define fd_clear_dma_ff() clear_dma_ff(FLOPPY_DMA)
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#define fd_set_dma_mode(mode) set_dma_mode(FLOPPY_DMA,mode)
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#define fd_set_dma_addr(addr) set_dma_addr(FLOPPY_DMA,virt_to_bus(addr))
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#define fd_set_dma_count(count) set_dma_count(FLOPPY_DMA,count)
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#define fd_enable_irq() enable_irq(FLOPPY_IRQ)
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#define fd_disable_irq() disable_irq(FLOPPY_IRQ)
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#define fd_cacheflush(addr,size) /* nothing */
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#define fd_request_irq() request_irq(FLOPPY_IRQ, floppy_interrupt,\
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0, "floppy", NULL)
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#define fd_free_irq() free_irq(FLOPPY_IRQ, NULL)
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#ifdef CONFIG_PCI
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#include <linux/pci.h>
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#define fd_dma_setup(addr,size,mode,io) alpha_fd_dma_setup(addr,size,mode,io)
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static __inline__ int
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alpha_fd_dma_setup(char *addr, unsigned long size, int mode, int io)
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{
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static unsigned long prev_size;
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static dma_addr_t bus_addr = 0;
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static char *prev_addr;
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static int prev_dir;
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int dir;
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dir = (mode != DMA_MODE_READ) ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE;
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if (bus_addr
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&& (addr != prev_addr || size != prev_size || dir != prev_dir)) {
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/* different from last time -- unmap prev */
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pci_unmap_single(isa_bridge, bus_addr, prev_size, prev_dir);
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bus_addr = 0;
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}
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if (!bus_addr) /* need to map it */
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bus_addr = pci_map_single(isa_bridge, addr, size, dir);
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/* remember this one as prev */
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prev_addr = addr;
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prev_size = size;
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prev_dir = dir;
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fd_clear_dma_ff();
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fd_cacheflush(addr, size);
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fd_set_dma_mode(mode);
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set_dma_addr(FLOPPY_DMA, bus_addr);
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fd_set_dma_count(size);
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virtual_dma_port = io;
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fd_enable_dma();
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return 0;
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}
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#endif /* CONFIG_PCI */
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__inline__ void virtual_dma_init(void)
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{
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/* Nothing to do on an Alpha */
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}
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static int FDC1 = 0x3f0;
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static int FDC2 = -1;
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/*
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* Again, the CMOS information doesn't work on the alpha..
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*/
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#define FLOPPY0_TYPE 6
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#define FLOPPY1_TYPE 0
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#define N_FDC 2
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#define N_DRIVE 8
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/*
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* Most Alphas have no problems with floppy DMA crossing 64k borders,
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* except for certain ones, like XL and RUFFIAN.
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*
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* However, the test is simple and fast, and this *is* floppy, after all,
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* so we do it for all platforms, just to make sure.
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*
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* This is advantageous in other circumstances as well, as in moving
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* about the PCI DMA windows and forcing the floppy to start doing
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* scatter-gather when it never had before, and there *is* a problem
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* on that platform... ;-}
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*/
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static inline unsigned long CROSS_64KB(void *a, unsigned long s)
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{
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unsigned long p = (unsigned long)a;
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return ((p + s - 1) ^ p) & ~0xffffUL;
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}
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#define EXTRA_FLOPPY_PARAMS
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#endif /* __ASM_ALPHA_FLOPPY_H */
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