b239cbe957
We used to assume that a DMA mapping request with a NULL dev was for ISA DMA. This assumption was broken at some point. Now we explicitly pass the detected ISA PCI device in the floppy setup. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
108 lines
2.8 KiB
C
108 lines
2.8 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_POWERPC_FLOPPY_H
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#define __ASM_POWERPC_FLOPPY_H
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#ifdef __KERNEL__
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#include <linux/config.h>
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#include <asm/machdep.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_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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SA_INTERRUPT|SA_SAMPLE_RANDOM, \
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"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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#include <asm/ppc-pci.h> /* for ppc64_isabridge_dev */
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#define fd_dma_setup(addr,size,mode,io) powerpc_fd_dma_setup(addr,size,mode,io)
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static __inline__ int powerpc_fd_dma_setup(char *addr, unsigned long size,
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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(ppc64_isabridge_dev, 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(ppc64_isabridge_dev, 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 PowerPC */
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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 not available
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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 /* Don't change this! */
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#define N_DRIVE 8
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#define FLOPPY_MOTOR_MASK 0xf0
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/*
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* The PowerPC has no problems with floppy DMA crossing 64k borders.
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*/
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#define CROSS_64KB(a,s) (0)
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#define EXTRA_FLOPPY_PARAMS
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#endif /* __KERNEL__ */
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#endif /* __ASM_POWERPC_FLOPPY_H */
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