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Diffstat (limited to 'include/asm-mips64/floppy.h')
| -rw-r--r-- | include/asm-mips64/floppy.h | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/include/asm-mips64/floppy.h b/include/asm-mips64/floppy.h new file mode 100644 index 000000000..d8f9b5005 --- /dev/null +++ b/include/asm-mips64/floppy.h @@ -0,0 +1,104 @@ +/* $Id$ + * + * 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, 1999 Ralf Baechle + */ +#ifndef _ASM_FLOPPY_H +#define _ASM_FLOPPY_H + +#include <asm/bootinfo.h> +#include <asm/jazz.h> +#include <asm/jazzdma.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_FLOPPY_H */ |