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- /* $Id: floppy.h,v 1.4 1998/05/07 18:38:41 ralf Exp $
- *
- * 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, 1996, 1997, 1998 Ralf Baechle
- */
- #ifndef __ASM_MIPS_FLOPPY_H
- #define __ASM_MIPS_FLOPPY_H
-
- #include <asm/bootinfo.h>
- #include <asm/jazz.h>
- #include <asm/jazzdma.h>
- #include <asm/mipsconfig.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(channel) fd_ops->fd_enable_dma(channel)
- #define fd_disable_dma(channel) fd_ops->fd_disable_dma(channel)
- #define fd_request_dma(channel) fd_ops->fd_request_dma(channel)
- #define fd_free_dma(channel) fd_ops->fd_free_dma(channel)
- #define fd_clear_dma_ff(channel) fd_ops->fd_clear_dma_ff(channel)
- #define fd_set_dma_mode(channel, mode) fd_ops->fd_set_dma_mode(channel, mode)
- #define fd_set_dma_addr(channel, addr) fd_ops->fd_set_dma_addr(channel, \
- virt_to_bus(addr))
- #define fd_set_dma_count(channel,count) fd_ops->fd_set_dma_count(channel,count)
- #define fd_get_dma_residue(channel) fd_ops->fd_get_dma_residue(channel)
-
- #define fd_enable_irq(irq) fd_ops->fd_enable_irq(irq)
- #define fd_disable_irq(irq) fd_ops->fd_disable_irq(irq)
- #define fd_request_irq(irq) request_irq(irq, floppy_interrupt, \
- SA_INTERRUPT \
- | SA_SAMPLE_RANDOM, \
- "floppy", NULL)
- #define fd_free_irq(irq) free_irq(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 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();
- static int FDC2=-1;
-
- #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_MIPS_FLOPPY_H */
-