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/
usr
/
src
/
linux-headers-6.8.0-36
/
arch
/
m68k
/
include
/
asm
/ [
drwxr-xr-x
]
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floppy.h
/* * Implementation independent bits of the Floppy driver. * * much of this file is derived from what was originally the Q40 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) 1999, 2000, 2001 * * Sun3x support added 2/4/2000 Sam Creasey (sammy@sammy.net) * */ #include <asm/io.h> #include <linux/vmalloc.h> asmlinkage irqreturn_t floppy_hardint(int irq, void *dev_id); /* constants... */ #undef MAX_DMA_ADDRESS #define MAX_DMA_ADDRESS 0x00 /* nothing like that */ /* * Again, the CMOS information doesn't work on m68k.. */ #define FLOPPY0_TYPE (MACH_IS_Q40 ? 6 : 4) #define FLOPPY1_TYPE 0 /* basically PC init + set use_virtual_dma */ #define FDC1 m68k_floppy_init() #define N_FDC 1 #define N_DRIVE 8 /* vdma globals adapted from asm-i386/floppy.h */ static int virtual_dma_count=0; static int virtual_dma_residue=0; static char *virtual_dma_addr=NULL; static int virtual_dma_mode=0; static int doing_pdma=0; #include <asm/sun3xflop.h> extern spinlock_t dma_spin_lock; static __inline__ unsigned long claim_dma_lock(void) { unsigned long flags; spin_lock_irqsave(&dma_spin_lock, flags); return flags; } static __inline__ void release_dma_lock(unsigned long flags) { spin_unlock_irqrestore(&dma_spin_lock, flags); } static __inline__ unsigned char fd_inb(int base, int reg) { if(MACH_IS_Q40) return inb_p(base + reg); else if(MACH_IS_SUN3X) return sun3x_82072_fd_inb(base + reg); return 0; } static __inline__ void fd_outb(unsigned char value, int base, int reg) { if(MACH_IS_Q40) outb_p(value, base + reg); else if(MACH_IS_SUN3X) sun3x_82072_fd_outb(value, base + reg); } static int fd_request_irq(void) { if(MACH_IS_Q40) return request_irq(FLOPPY_IRQ, floppy_hardint, 0, "floppy", floppy_hardint); else if(MACH_IS_SUN3X) return sun3xflop_request_irq(); return -ENXIO; } static void fd_free_irq(void) { if(MACH_IS_Q40) free_irq(FLOPPY_IRQ, floppy_hardint); } #define fd_request_dma() vdma_request_dma(FLOPPY_DMA,"floppy") #define fd_get_dma_residue() vdma_get_dma_residue(FLOPPY_DMA) #define fd_dma_mem_alloc(size) vdma_mem_alloc(size) #define fd_dma_setup(addr, size, mode, io) vdma_dma_setup(addr, size, mode, io) #define fd_enable_irq() /* nothing... */ #define fd_disable_irq() /* nothing... */ #define fd_free_dma() /* nothing */ /* No 64k boundary crossing problems on Q40 - no DMA at all */ #define CROSS_64KB(a,s) (0) #define DMA_MODE_READ 0x44 /* i386 look-alike */ #define DMA_MODE_WRITE 0x48 static int m68k_floppy_init(void) { use_virtual_dma =1; can_use_virtual_dma = 1; if (MACH_IS_Q40) return 0x3f0; else if(MACH_IS_SUN3X) return sun3xflop_init(); else return -1; } static int vdma_request_dma(unsigned int dmanr, const char * device_id) { return 0; } static int vdma_get_dma_residue(unsigned int dummy) { return virtual_dma_count + virtual_dma_residue; } static unsigned long vdma_mem_alloc(unsigned long size) { return (unsigned long) vmalloc(size); } static void _fd_dma_mem_free(unsigned long addr, unsigned long size) { vfree((void *)addr); } #define fd_dma_mem_free(addr,size) _fd_dma_mem_free(addr, size) /* choose_dma_mode ???*/ static int vdma_dma_setup(char *addr, unsigned long size, int mode, int io) { doing_pdma = 1; virtual_dma_port = (MACH_IS_Q40 ? io : 0); virtual_dma_mode = (mode == DMA_MODE_WRITE); virtual_dma_addr = addr; virtual_dma_count = size; virtual_dma_residue = 0; return 0; } static void fd_disable_dma(void) { doing_pdma = 0; virtual_dma_residue += virtual_dma_count; virtual_dma_count=0; } /* this is the only truly Q40 specific function */ asmlinkage irqreturn_t floppy_hardint(int irq, void *dev_id) { register unsigned char st; #undef TRACE_FLPY_INT #define NO_FLOPPY_ASSEMBLER #ifdef TRACE_FLPY_INT static int calls=0; static int bytes=0; static int dma_wait=0; #endif if(!doing_pdma) { floppy_interrupt(irq, dev_id); return IRQ_HANDLED; } #ifdef TRACE_FLPY_INT if(!calls) bytes = virtual_dma_count; #endif { register int lcount; register char *lptr; /* serve 1st byte fast: */ st=1; for(lcount=virtual_dma_count, lptr=virtual_dma_addr; lcount; lcount--, lptr++) { st = inb(virtual_dma_port + FD_STATUS); st &= STATUS_DMA | STATUS_READY; if (st != (STATUS_DMA | STATUS_READY)) break; if(virtual_dma_mode) outb_p(*lptr, virtual_dma_port + FD_DATA); else *lptr = inb_p(virtual_dma_port + FD_DATA); } virtual_dma_count = lcount; virtual_dma_addr = lptr; st = inb(virtual_dma_port + FD_STATUS); } #ifdef TRACE_FLPY_INT calls++; #endif if (st == STATUS_DMA) return IRQ_HANDLED; if (!(st & STATUS_DMA)) { virtual_dma_residue += virtual_dma_count; virtual_dma_count=0; #ifdef TRACE_FLPY_INT pr_info("count=%x, residue=%x calls=%d bytes=%d dma_wait=%d\n", virtual_dma_count, virtual_dma_residue, calls, bytes, dma_wait); calls = 0; dma_wait=0; #endif doing_pdma = 0; floppy_interrupt(irq, dev_id); return IRQ_HANDLED; } #ifdef TRACE_FLPY_INT if(!virtual_dma_count) dma_wait++; #endif return IRQ_HANDLED; } #define EXTRA_FLOPPY_PARAMS
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