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/*
 * 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 port)
{
	if(MACH_IS_Q40)
		return inb_p(port);
	else if(MACH_IS_SUN3X)
		return sun3x_82072_fd_inb(port);
	return 0;
}

static __inline__ void fd_outb(unsigned char value, int port)
{
	if(MACH_IS_Q40)
		outb_p(value, port);
	else if(MACH_IS_SUN3X)
		sun3x_82072_fd_outb(value, port);
}


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+4) & 0xa0 ;
			if(st != 0xa0)
				break;
			if(virtual_dma_mode)
				outb_p(*lptr, virtual_dma_port+5);
			else
				*lptr = inb_p(virtual_dma_port+5);
		}

		virtual_dma_count = lcount;
		virtual_dma_addr = lptr;
		st = inb(virtual_dma_port+4);
	}

#ifdef TRACE_FLPY_INT
	calls++;
#endif
	if(st == 0x20)
		return IRQ_HANDLED;
	if(!(st & 0x20)) {
		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

Filemanager

Name Type Size Permission Actions
Kbuild File 599 B 0644
MC68328.h File 37.82 KB 0644
MC68EZ328.h File 37.74 KB 0644
MC68VZ328.h File 41.02 KB 0644
a.out-core.h File 1.98 KB 0644
adb_iop.h File 1.09 KB 0644
amigahw.h File 10.49 KB 0644
amigaints.h File 3.5 KB 0644
amigayle.h File 3.19 KB 0644
amipcmcia.h File 2.51 KB 0644
apollohw.h File 2.35 KB 0644
asm-offsets.h File 35 B 0644
asm-prototypes.h File 211 B 0644
atafd.h File 300 B 0644
atafdreg.h File 2.68 KB 0644
atari_joystick.h File 457 B 0644
atari_stdma.h File 514 B 0644
atari_stram.h File 528 B 0644
atarihw.h File 20.3 KB 0644
atariints.h File 5.56 KB 0644
atarikb.h File 1.4 KB 0644
atomic.h File 4.86 KB 0644
bitops.h File 12.19 KB 0644
blinken.h File 641 B 0644
bootinfo.h File 783 B 0644
bootstd.h File 4.64 KB 0644
bug.h File 659 B 0644
bugs.h File 369 B 0644
bvme6000hw.h File 3.45 KB 0644
cache.h File 296 B 0644
cacheflush.h File 133 B 0644
cacheflush_mm.h File 6.92 KB 0644
cacheflush_no.h File 2.61 KB 0644
checksum.h File 3.4 KB 0644
cmpxchg.h File 3.34 KB 0644
coldfire.h File 1.61 KB 0644
contregs.h File 3.31 KB 0644
current.h File 580 B 0644
delay.h File 3.43 KB 0644
div64.h File 858 B 0644
dma-mapping.h File 291 B 0644
dma.h File 16.65 KB 0644
dsp56k.h File 1.24 KB 0644
dvma.h File 9.67 KB 0644
elf.h File 3.07 KB 0644
entry.h File 5.76 KB 0644
export.h File 74 B 0644
fb.h File 921 B 0644
fbio.h File 9.87 KB 0644
flat.h File 1.02 KB 0644
floppy.h File 5.06 KB 0644
fpu.h File 535 B 0644
ftrace.h File 12 B 0644
gpio.h File 2.64 KB 0644
hardirq.h File 594 B 0644
hash.h File 2.07 KB 0644
hp300hw.h File 186 B 0644
hwtest.h File 467 B 0644
ide.h File 1.67 KB 0644
idprom.h File 725 B 0644
intersil.h File 1.11 KB 0644
io.h File 383 B 0644
io_mm.h File 16.19 KB 0644
io_no.h File 5.26 KB 0644
irq.h File 2.57 KB 0644
irqflags.h File 1.61 KB 0644
kexec.h File 732 B 0644
linkage.h File 1.55 KB 0644
m5206sim.h File 6.4 KB 0644
m520xsim.h File 7.15 KB 0644
m523xsim.h File 7.7 KB 0644
m525xsim.h File 10.57 KB 0644
m5272sim.h File 6.05 KB 0644
m527xsim.h File 13.51 KB 0644
m528xsim.h File 9.37 KB 0644
m52xxacr.h File 3.57 KB 0644
m5307sim.h File 7.52 KB 0644
m53xxacr.h File 3.6 KB 0644
m53xxsim.h File 53.97 KB 0644
m5407sim.h File 6.14 KB 0644
m5441xsim.h File 8.5 KB 0644
m54xxacr.h File 4.82 KB 0644
m54xxgpt.h File 3.66 KB 0644
m54xxpci.h File 6.13 KB 0644
m54xxsim.h File 3.8 KB 0644
mac_asc.h File 520 B 0644
mac_baboon.h File 999 B 0644
mac_iop.h File 5.37 KB 0644
mac_oss.h File 1.83 KB 0644
mac_psc.h File 7.25 KB 0644
mac_via.h File 11.44 KB 0644
machdep.h File 1.34 KB 0644
machines.h File 3.13 KB 0644
machw.h File 588 B 0644
macintosh.h File 2.02 KB 0644
macints.h File 3.28 KB 0644
math-emu.h File 6.74 KB 0644
mc146818rtc.h File 598 B 0644
mcf8390.h File 3.75 KB 0644
mcf_pgalloc.h File 2.37 KB 0644
mcf_pgtable.h File 9.89 KB 0644
mcfclk.h File 1.01 KB 0644
mcfdma.h File 6.51 KB 0644
mcfgpio.h File 8.48 KB 0644
mcfintc.h File 3.09 KB 0644
mcfmmu.h File 3.67 KB 0644
mcfpit.h File 2.22 KB 0644
mcfqspi.h File 1.82 KB 0644
mcfsim.h File 1.5 KB 0644
mcfslt.h File 1.21 KB 0644
mcftimer.h File 2.3 KB 0644
mcfuart.h File 6.91 KB 0644
mcfwdebug.h File 4.99 KB 0644
mmu.h File 243 B 0644
mmu_context.h File 7.2 KB 0644
mmzone.h File 264 B 0644
module.h File 847 B 0644
motorola_pgalloc.h File 2.26 KB 0644
motorola_pgtable.h File 9.2 KB 0644
movs.h File 1.44 KB 0644
mvme147hw.h File 2.81 KB 0644
mvme16xhw.h File 2.16 KB 0644
natfeat.h File 533 B 0644
nettel.h File 2.95 KB 0644
nubus.h File 1.21 KB 0644
openprom.h File 7.98 KB 0644
oplib.h File 9.54 KB 0644
page.h File 1.47 KB 0644
page_mm.h File 4.06 KB 0644
page_no.h File 1.28 KB 0644
page_offset.h File 256 B 0644
parport.h File 837 B 0644
pci.h File 458 B 0644
pgalloc.h File 444 B 0644
pgtable.h File 127 B 0644
pgtable_mm.h File 4.84 KB 0644
pgtable_no.h File 1.57 KB 0644
processor.h File 3.59 KB 0644
ptrace.h File 643 B 0644
q40_master.h File 2.28 KB 0644
q40ints.h File 749 B 0644
quicc_simple.h File 1.79 KB 0644
raw_io.h File 11.41 KB 0644
segment.h File 1.42 KB 0644
serial.h File 1.14 KB 0644
setup.h File 9.25 KB 0644
signal.h File 1.34 KB 0644
smp.h File 32 B 0644
string.h File 1.68 KB 0644
sun3-head.h File 353 B 0644
sun3_pgalloc.h File 2.26 KB 0644
sun3_pgtable.h File 7.65 KB 0644
sun3ints.h File 989 B 0644
sun3mmu.h File 4.91 KB 0644
sun3x.h File 868 B 0644
sun3xflop.h File 5.62 KB 0644
sun3xprom.h File 1.31 KB 0644
switch_to.h File 1.51 KB 0644
thread_info.h File 2.02 KB 0644
timex.h File 974 B 0644
tlb.h File 486 B 0644
tlbflush.h File 5.95 KB 0644
traps.h File 8.33 KB 0644
uaccess.h File 152 B 0644
uaccess_mm.h File 10.31 KB 0644
uaccess_no.h File 3.69 KB 0644
ucontext.h File 570 B 0644
unaligned.h File 600 B 0644
unistd.h File 952 B 0644
user.h File 3.78 KB 0644
vga.h File 651 B 0644
virtconvert.h File 947 B 0644
zorro.h File 1.17 KB 0644