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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 | /* * 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 - 2000 Ralf Baechle */ #ifndef _ASM_FLOPPY_H #define _ASM_FLOPPY_H #include <asm/bootinfo.h> struct fd_ops { unsigned char (*fd_inb)(unsigned int port); void (*fd_outb)(unsigned char value, unsigned int port); /* * How to access the floppy DMA functions. */ void (*fd_enable_dma)(int channel); void (*fd_disable_dma)(int channel); int (*fd_request_dma)(int channel); void (*fd_free_dma)(int channel); void (*fd_clear_dma_ff)(int channel); void (*fd_set_dma_mode)(int channel, char mode); void (*fd_set_dma_addr)(int channel, unsigned int a); void (*fd_set_dma_count)(int channel, unsigned int count); int (*fd_get_dma_residue)(int channel); void (*fd_enable_irq)(int irq); void (*fd_disable_irq)(int irq); unsigned long (*fd_getfdaddr1)(void); unsigned long (*fd_dma_mem_alloc)(unsigned long size); void (*fd_dma_mem_free)(unsigned long addr, unsigned long size); unsigned long (*fd_drive_type)(unsigned long); }; extern struct fd_ops *fd_ops; #define fd_inb(port) fd_ops->fd_inb(port) #define fd_outb(value,port) fd_ops->fd_outb(value,port) #define fd_enable_dma() fd_ops->fd_enable_dma(FLOPPY_DMA) #define fd_disable_dma() fd_ops->fd_disable_dma(FLOPPY_DMA) #define fd_request_dma() fd_ops->fd_request_dma(FLOPPY_DMA) #define fd_free_dma() fd_ops->fd_free_dma(FLOPPY_DMA) #define fd_clear_dma_ff() fd_ops->fd_clear_dma_ff(FLOPPY_DMA) #define fd_set_dma_mode(mode) fd_ops->fd_set_dma_mode(FLOPPY_DMA, mode) #define fd_set_dma_addr(addr) fd_ops->fd_set_dma_addr(FLOPPY_DMA, \ virt_to_bus(addr)) #define fd_set_dma_count(count) fd_ops->fd_set_dma_count(FLOPPY_DMA,count) #define fd_get_dma_residue() fd_ops->fd_get_dma_residue(FLOPPY_DMA) #define fd_enable_irq() fd_ops->fd_enable_irq(FLOPPY_IRQ) #define fd_disable_irq() fd_ops->fd_disable_irq(FLOPPY_IRQ) #define fd_request_irq() request_irq(FLOPPY_IRQ, floppy_interrupt, \ SA_INTERRUPT | SA_SAMPLE_RANDOM, \ "floppy", NULL) #define fd_free_irq() free_irq(FLOPPY_IRQ, NULL); #define fd_dma_mem_alloc(size) fd_ops->fd_dma_mem_alloc(size) #define fd_dma_mem_free(mem,size) fd_ops->fd_dma_mem_free(mem,size) #define fd_drive_type(n) fd_ops->fd_drive_type(n) #define fd_cacheflush(addr,size) dma_cache_wback_inv(addr,size) #define MAX_BUFFER_SECTORS 24 /* * And on Mips's the CMOS info fails also ... * * FIXME: This information should come from the ARC configuration tree * or whereever a particular machine has stored this ... */ #define FLOPPY0_TYPE fd_drive_type(0) #define FLOPPY1_TYPE fd_drive_type(1) #define FDC1 fd_ops->fd_getfdaddr1(); /* * Hack: The floppy drivrer defines this, before including fdreg.h. We use * to define FDC2 only one and keep it a static variable in floppy.c. */ #ifdef FDPATCHES static int FDC2=-1; #endif #define N_FDC 1 /* do you *really* want a second controller? */ #define N_DRIVE 8 #define FLOPPY_MOTOR_MASK 0xf0 /* * The DMA channel used by the floppy controller cannot access data at * addresses >= 16MB * * Went back to the 1MB limit, as some people had problems with the floppy * driver otherwise. It doesn't matter much for performance anyway, as most * floppy accesses go through the track buffer. * * On MIPSes using vdma, this actually means that *all* transfers go thru * the * track buffer since 0x1000000 is always smaller than KSEG0/1. * Actually this needs to be a bit more complicated since the so much different * hardware available with MIPS CPUs ... */ #define CROSS_64KB(a,s) ((unsigned long)(a)/K_64 != ((unsigned long)(a) + (s) - 1) / K_64) #endif /* _ASM_FLOPPY_H */ |