FM / asm

/usr/src/linux-headers-5.15.0-190/arch/sparc/include/asm/

/usr/src/linux-headers-5.15.0-190/arch/sparc/include/asm

Name	Size	Mode	Actions
adi.h	138	0644	edit dl rm
adi_64.h	812	0644	edit dl rm
agp.h	434	0644	edit dl rm
apb.h	1082	0644	edit dl rm
asm-offsets.h	35	0644	edit dl rm
asm-prototypes.h	729	0644	edit dl rm
asm.h	1101	0644	edit dl rm
asmmacro.h	1183	0644	edit dl rm
atomic.h	219	0644	edit dl rm
atomic_32.h	1760	0644	edit dl rm
atomic_64.h	1849	0644	edit dl rm
auxio.h	310	0644	edit dl rm
auxio_32.h	2615	0644	edit dl rm
auxio_64.h	3253	0644	edit dl rm
backoff.h	2756	0644	edit dl rm
barrier.h	223	0644	edit dl rm
barrier_32.h	160	0644	edit dl rm
barrier_64.h	2004	0644	edit dl rm
bbc.h	9996	0644	edit dl rm
bitext.h	631	0644	edit dl rm
bitops.h	219	0644	edit dl rm
bitops_32.h	2853	0644	edit dl rm
bitops_64.h	1675	0644	edit dl rm
btext.h	145	0644	edit dl rm
bug.h	588	0644	edit dl rm
cache.h	630	0644	edit dl rm
cacheflush.h	373	0644	edit dl rm
cacheflush_32.h	1951	0644	edit dl rm
cacheflush_64.h	2557	0644	edit dl rm
cachetlb_32.h	882	0644	edit dl rm
chafsr.h	9710	0644	edit dl rm
checksum.h	331	0644	edit dl rm
checksum_32.h	5791	0644	edit dl rm
checksum_64.h	3855	0644	edit dl rm
chmctrl.h	8096	0644	edit dl rm
clock.h	231	0644	edit dl rm
clocksource.h	407	0644	edit dl rm
cmpxchg.h	223	0644	edit dl rm
cmpxchg_32.h	2483	0644	edit dl rm
cmpxchg_64.h	5288	0644	edit dl rm
compat.h	3890	0644	edit dl rm
compat_signal.h	565	0644	edit dl rm
contregs.h	1941	0644	edit dl rm
cpudata.h	378	0644	edit dl rm
cpudata_32.h	729	0644	edit dl rm
cpudata_64.h	1153	0644	edit dl rm
cpu_type.h	579	0644	edit dl rm
current.h	991	0644	edit dl rm
dcr.h	728	0644	edit dl rm
dcu.h	1520	0644	edit dl rm
delay.h	215	0644	edit dl rm
delay_32.h	907	0644	edit dl rm
delay_64.h	403	0644	edit dl rm
device.h	565	0644	edit dl rm
dma-mapping.h	336	0644	edit dl rm
dma.h	4989	0644	edit dl rm
ebus_dma.h	1098	0644	edit dl rm
ecc.h	4448	0644	edit dl rm
eeprom.h	254	0644	edit dl rm
elf.h	207	0644	edit dl rm
elf_32.h	3267	0644	edit dl rm
elf_64.h	6848	0644	edit dl rm
estate.h	2287	0644	edit dl rm
extable.h	723	0644	edit dl rm
fb.h	680	0644	edit dl rm
fbio.h	2315	0644	edit dl rm
fhc.h	4533	0644	edit dl rm
floppy.h	219	0644	edit dl rm
floppy_32.h	9796	0644	edit dl rm
floppy_64.h	19392	0644	edit dl rm
fpumacro.h	710	0644	edit dl rm
ftrace.h	801	0644	edit dl rm
futex.h	215	0644	edit dl rm
futex_32.h	82	0644	edit dl rm
futex_64.h	2160	0644	edit dl rm
hardirq.h	223	0644	edit dl rm
hardirq_32.h	334	0644	edit dl rm
hardirq_64.h	412	0644	edit dl rm
head.h	211	0644	edit dl rm
head_32.h	2617	0644	edit dl rm
head_64.h	2184	0644	edit dl rm
hibernate.h	421	0644	edit dl rm
highmem.h	1966	0644	edit dl rm
hugetlb.h	1592	0644	edit dl rm
hvtramp.h	782	0644	edit dl rm
hw_irq.h	88	0644	edit dl rm
hypervisor.h	117649	0644	edit dl rm
ide.h	2222	0644	edit dl rm
idprom.h	656	0644	edit dl rm
intr_queue.h	794	0644	edit dl rm
io-unit.h	2469	0644	edit dl rm
io.h	620	0644	edit dl rm
ioctls.h	358	0644	edit dl rm
iommu-common.h	1445	0644	edit dl rm
iommu.h	215	0644	edit dl rm
iommu_32.h	5865	0644	edit dl rm
iommu_64.h	2489	0644	edit dl rm
io_32.h	3430	0644	edit dl rm
io_64.h	11076	0644	edit dl rm
irq.h	207	0644	edit dl rm
irqflags.h	227	0644	edit dl rm
irqflags_32.h	1058	0644	edit dl rm
irqflags_64.h	1952	0644	edit dl rm
irq_32.h	526	0644	edit dl rm
irq_64.h	3105	0644	edit dl rm
jump_label.h	1036	0644	edit dl rm
Kbuild	177	0644	edit dl rm
kdebug.h	219	0644	edit dl rm
kdebug_32.h	2041	0644	edit dl rm
kdebug_64.h	393	0644	edit dl rm
kgdb.h	1014	0644	edit dl rm
kprobes.h	1410	0644	edit dl rm
ldc.h	4475	0644	edit dl rm
leon.h	7844	0644	edit dl rm
leon_amba.h	8280	0644	edit dl rm
leon_pci.h	512	0644	edit dl rm
lsu.h	1062	0644	edit dl rm
machines.h	1540	0644	edit dl rm
mbus.h	2996	0644	edit dl rm
mc146818rtc.h	298	0644	edit dl rm
mc146818rtc_32.h	699	0644	edit dl rm
mc146818rtc_64.h	689	0644	edit dl rm
mdesc.h	3066	0644	edit dl rm
memctrl.h	311	0644	edit dl rm
mman.h	2633	0644	edit dl rm
mmu.h	207	0644	edit dl rm
mmu_32.h	209	0644	edit dl rm
mmu_64.h	3967	0644	edit dl rm
mmu_context.h	239	0644	edit dl rm
mmu_context_32.h	1082	0644	edit dl rm
mmu_context_64.h	5481	0644	edit dl rm
mmzone.h	363	0644	edit dl rm
mxcc.h	4429	0644	edit dl rm
nmi.h	354	0644	edit dl rm
ns87303.h	3299	0644	edit dl rm
obio.h	6410	0644	edit dl rm
openprom.h	7475	0644	edit dl rm
oplib.h	215	0644	edit dl rm
oplib_32.h	6062	0644	edit dl rm
oplib_64.h	8357	0644	edit dl rm
page.h	274	0644	edit dl rm
page_32.h	3826	0644	edit dl rm
page_64.h	4753	0644	edit dl rm
parport.h	5819	0644	edit dl rm
pbm.h	1505	0644	edit dl rm
pci.h	1367	0644	edit dl rm
pcic.h	5904	0644	edit dl rm
pcr.h	1893	0644	edit dl rm
percpu.h	219	0644	edit dl rm
percpu_32.h	168	0644	edit dl rm
percpu_64.h	541	0644	edit dl rm
perf_event.h	802	0644	edit dl rm
pgalloc.h	223	0644	edit dl rm
pgalloc_32.h	1823	0644	edit dl rm
pgalloc_64.h	2764	0644	edit dl rm
pgtable.h	223	0644	edit dl rm
pgtable_32.h	11021	0644	edit dl rm
pgtable_64.h	32369	0644	edit dl rm
pgtsrmmu.h	4879	0644	edit dl rm
pil.h	1109	0644	edit dl rm
processor.h	231	0644	edit dl rm
processor_32.h	2836	0644	edit dl rm
processor_64.h	7577	0644	edit dl rm
prom.h	1776	0644	edit dl rm
psr.h	1414	0644	edit dl rm
ptrace.h	4294	0644	edit dl rm
qrwlock.h	205	0644	edit dl rm
qspinlock.h	215	0644	edit dl rm
ross.h	5655	0644	edit dl rm
sbi.h	3425	0644	edit dl rm
scratchpad.h	547	0644	edit dl rm
seccomp.h	225	0644	edit dl rm
sections.h	289	0644	edit dl rm
setup.h	1552	0644	edit dl rm
sfafsr.h	3216	0644	edit dl rm
sfp-machine.h	239	0644	edit dl rm
sfp-machine_32.h	6954	0644	edit dl rm
sfp-machine_64.h	3178	0644	edit dl rm
shmparam.h	227	0644	edit dl rm
shmparam_32.h	253	0644	edit dl rm
shmparam_64.h	306	0644	edit dl rm
sigcontext.h	2616	0644	edit dl rm
signal.h	351	0644	edit dl rm
smp.h	207	0644	edit dl rm
smp_32.h	3368	0644	edit dl rm
smp_64.h	1791	0644	edit dl rm
sparsemem.h	295	0644	edit dl rm
spinlock.h	227	0644	edit dl rm
spinlock_32.h	4324	0644	edit dl rm
spinlock_64.h	409	0644	edit dl rm
spinlock_types.h	549	0644	edit dl rm
spitfire.h	9967	0644	edit dl rm
stacktrace.h	166	0644	edit dl rm
starfire.h	418	0644	edit dl rm
string.h	1254	0644	edit dl rm
string_32.h	405	0644	edit dl rm
string_64.h	409	0644	edit dl rm
sunbpp.h	3346	0644	edit dl rm
swift.h	3147	0644	edit dl rm
switch_to.h	231	0644	edit dl rm
switch_to_32.h	3616	0644	edit dl rm
switch_to_64.h	2640	0644	edit dl rm
syscall.h	3464	0644	edit dl rm
syscalls.h	299	0644	edit dl rm
termbits.h	198	0644	edit dl rm
termios.h	5063	0644	edit dl rm
thread_info.h	239	0644	edit dl rm
thread_info_32.h	3773	0644	edit dl rm
thread_info_64.h	8195	0644	edit dl rm
timer.h	215	0644	edit dl rm
timer_32.h	1211	0644	edit dl rm
timer_64.h	2448	0644	edit dl rm
timex.h	215	0644	edit dl rm
timex_32.h	266	0644	edit dl rm
timex_64.h	423	0644	edit dl rm
tlb.h	207	0644	edit dl rm
tlbflush.h	227	0644	edit dl rm
tlbflush_32.h	621	0644	edit dl rm
tlbflush_64.h	1776	0644	edit dl rm
tlb_32.h	138	0644	edit dl rm
tlb_64.h	1056	0644	edit dl rm
topology.h	227	0644	edit dl rm
topology_32.h	170	0644	edit dl rm
topology_64.h	1546	0644	edit dl rm
traps.h	577	0644	edit dl rm
trap_block.h	6786	0644	edit dl rm
tsb.h	12457	0644	edit dl rm
tsunami.h	1890	0644	edit dl rm
ttable.h	20827	0644	edit dl rm
turbosparc.h	3866	0644	edit dl rm
uaccess.h	390	0644	edit dl rm
uaccess_32.h	7032	0644	edit dl rm
uaccess_64.h	6142	0644	edit dl rm
unistd.h	1797	0644	edit dl rm
upa.h	3808	0644	edit dl rm
uprobes.h	1304	0644	edit dl rm
user.h	102	0644	edit dl rm
vaddrs.h	2066	0644	edit dl rm
vdso.h	491	0644	edit dl rm
vga.h	964	0644	edit dl rm
viking.h	8341	0644	edit dl rm
vio.h	12097	0644	edit dl rm
visasm.h	1544	0644	edit dl rm
vmalloc.h	93	0644	edit dl rm
vvar.h	1577	0644	edit dl rm
winmacro.h	4767	0644	edit dl rm
xor.h	207	0644	edit dl rm
xor_32.h	7086	0644	edit dl rm
xor_64.h	2156	0644	edit dl rm

Edit: /usr/src/linux-headers-5.15.0-190/arch/sparc/include/asm/floppy_64.h (19392B)

/* SPDX-License-Identifier: GPL-2.0 */
/* floppy.h: Sparc specific parts of the Floppy driver.
 *
 * Copyright (C) 1996, 2007, 2008 David S. Miller (davem@davemloft.net)
 * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
 *
 * Ultra/PCI support added: Sep 1997  Eddie C. Dost  (ecd@skynet.be)
 */

#ifndef __ASM_SPARC64_FLOPPY_H
#define __ASM_SPARC64_FLOPPY_H

#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/dma-mapping.h>

#include <asm/auxio.h>

/*
 * Define this to enable exchanging drive 0 and 1 if only drive 1 is
 * probed on PCI machines.
 */
#undef PCI_FDC_SWAP_DRIVES

/* References:
 * 1) Netbsd Sun floppy driver.
 * 2) NCR 82077 controller manual
 * 3) Intel 82077 controller manual
 */
struct sun_flpy_controller {
	volatile unsigned char status1_82077; /* Auxiliary Status reg. 1 */
	volatile unsigned char status2_82077; /* Auxiliary Status reg. 2 */
	volatile unsigned char dor_82077;     /* Digital Output reg. */
	volatile unsigned char tapectl_82077; /* Tape Control reg */
	volatile unsigned char status_82077;  /* Main Status Register. */
#define drs_82077              status_82077   /* Digital Rate Select reg. */
	volatile unsigned char data_82077;    /* Data fifo. */
	volatile unsigned char ___unused;
	volatile unsigned char dir_82077;     /* Digital Input reg. */
#define dcr_82077              dir_82077      /* Config Control reg. */
};

/* You'll only ever find one controller on an Ultra anyways. */
static struct sun_flpy_controller *sun_fdc = (struct sun_flpy_controller *)-1;
unsigned long fdc_status;
static struct platform_device *floppy_op = NULL;

struct sun_floppy_ops {
	unsigned char	(*fd_inb) (unsigned long port, unsigned int reg);
	void		(*fd_outb) (unsigned char value, unsigned long base,
				    unsigned int reg);
	void		(*fd_enable_dma) (void);
	void		(*fd_disable_dma) (void);
	void		(*fd_set_dma_mode) (int);
	void		(*fd_set_dma_addr) (char *);
	void		(*fd_set_dma_count) (int);
	unsigned int	(*get_dma_residue) (void);
	int		(*fd_request_irq) (void);
	void		(*fd_free_irq) (void);
	int		(*fd_eject) (int);
};

static struct sun_floppy_ops sun_fdops;

#define fd_inb(base, reg)         sun_fdops.fd_inb(base, reg)
#define fd_outb(value, base, reg) sun_fdops.fd_outb(value, base, reg)
#define fd_enable_dma()           sun_fdops.fd_enable_dma()
#define fd_disable_dma()          sun_fdops.fd_disable_dma()
#define fd_request_dma()          (0) /* nothing... */
#define fd_free_dma()             /* nothing... */
#define fd_clear_dma_ff()         /* nothing... */
#define fd_set_dma_mode(mode)     sun_fdops.fd_set_dma_mode(mode)
#define fd_set_dma_addr(addr)     sun_fdops.fd_set_dma_addr(addr)
#define fd_set_dma_count(count)   sun_fdops.fd_set_dma_count(count)
#define get_dma_residue(x)        sun_fdops.get_dma_residue()
#define fd_request_irq()          sun_fdops.fd_request_irq()
#define fd_free_irq()             sun_fdops.fd_free_irq()
#define fd_eject(drive)           sun_fdops.fd_eject(drive)

/* Super paranoid... */
#undef HAVE_DISABLE_HLT

static int sun_floppy_types[2] = { 0, 0 };

/* Here is where we catch the floppy driver trying to initialize,
 * therefore this is where we call the PROM device tree probing
 * routine etc. on the Sparc.
 */
#define FLOPPY0_TYPE		sun_floppy_init()
#define FLOPPY1_TYPE		sun_floppy_types[1]

#define FDC1			((unsigned long)sun_fdc)

#define N_FDC    1
#define N_DRIVE  8

/* No 64k boundary crossing problems on the Sparc. */
#define CROSS_64KB(a,s) (0)

static unsigned char sun_82077_fd_inb(unsigned long base, unsigned int reg)
{
	udelay(5);
	switch (reg) {
	default:
		printk("floppy: Asked to read unknown port %x\n", reg);
		panic("floppy: Port bolixed.");
	case FD_STATUS:
		return sbus_readb(&sun_fdc->status_82077) & ~STATUS_DMA;
	case FD_DATA:
		return sbus_readb(&sun_fdc->data_82077);
	case FD_DIR:
		/* XXX: Is DCL on 0x80 in sun4m? */
		return sbus_readb(&sun_fdc->dir_82077);
	}
	panic("sun_82072_fd_inb: How did I get here?");
}

static void sun_82077_fd_outb(unsigned char value, unsigned long base,
			      unsigned int reg)
{
	udelay(5);
	switch (reg) {
	default:
		printk("floppy: Asked to write to unknown port %x\n", reg);
		panic("floppy: Port bolixed.");
	case FD_DOR:
		/* Happily, the 82077 has a real DOR register. */
		sbus_writeb(value, &sun_fdc->dor_82077);
		break;
	case FD_DATA:
		sbus_writeb(value, &sun_fdc->data_82077);
		break;
	case FD_DCR:
		sbus_writeb(value, &sun_fdc->dcr_82077);
		break;
	case FD_DSR:
		sbus_writeb(value, &sun_fdc->status_82077);
		break;
	}
	return;
}

/* For pseudo-dma (Sun floppy drives have no real DMA available to
 * them so we must eat the data fifo bytes directly ourselves) we have
 * three state variables.  doing_pdma tells our inline low-level
 * assembly floppy interrupt entry point whether it should sit and eat
 * bytes from the fifo or just transfer control up to the higher level
 * floppy interrupt c-code.  I tried very hard but I could not get the
 * pseudo-dma to work in c-code without getting many overruns and
 * underruns.  If non-zero, doing_pdma encodes the direction of
 * the transfer for debugging.  1=read 2=write
 */
unsigned char *pdma_vaddr;
unsigned long pdma_size;
volatile int doing_pdma = 0;

/* This is software state */
char *pdma_base = NULL;
unsigned long pdma_areasize;

/* Common routines to all controller types on the Sparc. */
static void sun_fd_disable_dma(void)
{
	doing_pdma = 0;
	pdma_base = NULL;
}

static void sun_fd_set_dma_mode(int mode)
{
	switch(mode) {
	case DMA_MODE_READ:
		doing_pdma = 1;
		break;
	case DMA_MODE_WRITE:
		doing_pdma = 2;
		break;
	default:
		printk("Unknown dma mode %d\n", mode);
		panic("floppy: Giving up...");
	}
}

static void sun_fd_set_dma_addr(char *buffer)
{
	pdma_vaddr = buffer;
}

static void sun_fd_set_dma_count(int length)
{
	pdma_size = length;
}

static void sun_fd_enable_dma(void)
{
	pdma_base = pdma_vaddr;
	pdma_areasize = pdma_size;
}

irqreturn_t sparc_floppy_irq(int irq, void *dev_cookie)
{
	if (likely(doing_pdma)) {
		void __iomem *stat = (void __iomem *) fdc_status;
		unsigned char *vaddr = pdma_vaddr;
		unsigned long size = pdma_size;
		u8 val;

while (size) {
			val = readb(stat);
			if (unlikely(!(val & 0x80))) {
				pdma_vaddr = vaddr;
				pdma_size = size;
				return IRQ_HANDLED;
			}
			if (unlikely(!(val & 0x20))) {
				pdma_vaddr = vaddr;
				pdma_size = size;
				doing_pdma = 0;
				goto main_interrupt;
			}
			if (val & 0x40) {
				/* read */
				*vaddr++ = readb(stat + 1);
			} else {
				unsigned char data = *vaddr++;

/* write */
				writeb(data, stat + 1);
			}
			size--;
		}

pdma_vaddr = vaddr;
		pdma_size = size;

/* Send Terminal Count pulse to floppy controller. */
		val = readb(auxio_register);
		val |= AUXIO_AUX1_FTCNT;
		writeb(val, auxio_register);
		val &= ~AUXIO_AUX1_FTCNT;
		writeb(val, auxio_register);

doing_pdma = 0;
	}

main_interrupt:
	return floppy_interrupt(irq, dev_cookie);
}

static int sun_fd_request_irq(void)
{
	static int once = 0;
	int error;

if(!once) {
		once = 1;

error = request_irq(FLOPPY_IRQ, sparc_floppy_irq,
				    0, "floppy", NULL);

return ((error == 0) ? 0 : -1);
	}
	return 0;
}

static void sun_fd_free_irq(void)
{
}

static unsigned int sun_get_dma_residue(void)
{
	/* XXX This isn't really correct. XXX */
	return 0;
}

static int sun_fd_eject(int drive)
{
	set_dor(0x00, 0xff, 0x90);
	udelay(500);
	set_dor(0x00, 0x6f, 0x00);
	udelay(500);
	return 0;
}

#include <asm/ebus_dma.h>
#include <asm/ns87303.h>

static struct ebus_dma_info sun_pci_fd_ebus_dma;
static struct device *sun_floppy_dev;
static int sun_pci_broken_drive = -1;

struct sun_pci_dma_op {
	unsigned int 	addr;
	int		len;
	int		direction;
	char		*buf;
};
static struct sun_pci_dma_op sun_pci_dma_current = { -1U, 0, 0, NULL};
static struct sun_pci_dma_op sun_pci_dma_pending = { -1U, 0, 0, NULL};

irqreturn_t floppy_interrupt(int irq, void *dev_id);

static unsigned char sun_pci_fd_inb(unsigned long base, unsigned int reg)
{
	udelay(5);
	return inb(base + reg);
}

static void sun_pci_fd_outb(unsigned char val, unsigned long base,
			    unsigned int reg)
{
	udelay(5);
	outb(val, base + reg);
}

static void sun_pci_fd_broken_outb(unsigned char val, unsigned long base,
				   unsigned int reg)
{
	udelay(5);
	/*
	 * XXX: Due to SUN's broken floppy connector on AX and AXi
	 *      we need to turn on MOTOR_0 also, if the floppy is
	 *      jumpered to DS1 (like most PC floppies are). I hope
	 *      this does not hurt correct hardware like the AXmp.
	 *      (Eddie, Sep 12 1998).
	 */
	if (reg == FD_DOR) {
		if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x20)) {
			val |= 0x10;
		}
	}
	outb(val, base + reg);
}

#ifdef PCI_FDC_SWAP_DRIVES
static void sun_pci_fd_lde_broken_outb(unsigned char val, unsigned long base,
				       unsigned int reg)
{
	udelay(5);
	/*
	 * XXX: Due to SUN's broken floppy connector on AX and AXi
	 *      we need to turn on MOTOR_0 also, if the floppy is
	 *      jumpered to DS1 (like most PC floppies are). I hope
	 *      this does not hurt correct hardware like the AXmp.
	 *      (Eddie, Sep 12 1998).
	 */
	if (reg == FD_DOR) {
		if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x10)) {
			val &= ~(0x03);
			val |= 0x21;
		}
	}
	outb(val, base + reg);
}
#endif /* PCI_FDC_SWAP_DRIVES */

static void sun_pci_fd_enable_dma(void)
{
	BUG_ON((NULL == sun_pci_dma_pending.buf) 	||
	    (0	  == sun_pci_dma_pending.len) 	||
	    (0	  == sun_pci_dma_pending.direction));

sun_pci_dma_current.buf = sun_pci_dma_pending.buf;
	sun_pci_dma_current.len = sun_pci_dma_pending.len;
	sun_pci_dma_current.direction = sun_pci_dma_pending.direction;

sun_pci_dma_pending.buf  = NULL;
	sun_pci_dma_pending.len  = 0;
	sun_pci_dma_pending.direction = 0;
	sun_pci_dma_pending.addr = -1U;

sun_pci_dma_current.addr =
		dma_map_single(sun_floppy_dev,
			       sun_pci_dma_current.buf,
			       sun_pci_dma_current.len,
			       sun_pci_dma_current.direction);

ebus_dma_enable(&sun_pci_fd_ebus_dma, 1);

if (ebus_dma_request(&sun_pci_fd_ebus_dma,
			     sun_pci_dma_current.addr,
			     sun_pci_dma_current.len))
		BUG();
}

static void sun_pci_fd_disable_dma(void)
{
	ebus_dma_enable(&sun_pci_fd_ebus_dma, 0);
	if (sun_pci_dma_current.addr != -1U)
		dma_unmap_single(sun_floppy_dev,
				 sun_pci_dma_current.addr,
				 sun_pci_dma_current.len,
				 sun_pci_dma_current.direction);
	sun_pci_dma_current.addr = -1U;
}

static void sun_pci_fd_set_dma_mode(int mode)
{
	if (mode == DMA_MODE_WRITE)
		sun_pci_dma_pending.direction = DMA_TO_DEVICE;
	else
		sun_pci_dma_pending.direction = DMA_FROM_DEVICE;

ebus_dma_prepare(&sun_pci_fd_ebus_dma, mode != DMA_MODE_WRITE);
}

static void sun_pci_fd_set_dma_count(int length)
{
	sun_pci_dma_pending.len = length;
}

static void sun_pci_fd_set_dma_addr(char *buffer)
{
	sun_pci_dma_pending.buf = buffer;
}

static unsigned int sun_pci_get_dma_residue(void)
{
	return ebus_dma_residue(&sun_pci_fd_ebus_dma);
}

static int sun_pci_fd_request_irq(void)
{
	return ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 1);
}

static void sun_pci_fd_free_irq(void)
{
	ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 0);
}

static int sun_pci_fd_eject(int drive)
{
	return -EINVAL;
}

void sun_pci_fd_dma_callback(struct ebus_dma_info *p, int event, void *cookie)
{
	floppy_interrupt(0, NULL);
}

/*
 * Floppy probing, we'd like to use /dev/fd0 for a single Floppy on PCI,
 * even if this is configured using DS1, thus looks like /dev/fd1 with
 * the cabling used in Ultras.
 */
#define DOR	(port + 2)
#define MSR	(port + 4)
#define FIFO	(port + 5)

static void sun_pci_fd_out_byte(unsigned long port, unsigned char val,
			        unsigned long reg)
{
	unsigned char status;
	int timeout = 1000;

while (!((status = inb(MSR)) & 0x80) && --timeout)
		udelay(100);
	outb(val, reg);
}

static unsigned char sun_pci_fd_sensei(unsigned long port)
{
	unsigned char result[2] = { 0x70, 0x00 };
	unsigned char status;
	int i = 0;

sun_pci_fd_out_byte(port, 0x08, FIFO);
	do {
		int timeout = 1000;

while (!((status = inb(MSR)) & 0x80) && --timeout)
			udelay(100);

if (!timeout)
			break;

if ((status & 0xf0) == 0xd0)
			result[i++] = inb(FIFO);
		else
			break;
	} while (i < 2);

return result[0];
}

static void sun_pci_fd_reset(unsigned long port)
{
	unsigned char mask = 0x00;
	unsigned char status;
	int timeout = 10000;

outb(0x80, MSR);
	do {
		status = sun_pci_fd_sensei(port);
		if ((status & 0xc0) == 0xc0)
			mask |= 1 << (status & 0x03);
		else
			udelay(100);
	} while ((mask != 0x0f) && --timeout);
}

static int sun_pci_fd_test_drive(unsigned long port, int drive)
{
	unsigned char status, data;
	int timeout = 1000;
	int ready;

sun_pci_fd_reset(port);

data = (0x10 << drive) | 0x0c | drive;
	sun_pci_fd_out_byte(port, data, DOR);

sun_pci_fd_out_byte(port, 0x07, FIFO);
	sun_pci_fd_out_byte(port, drive & 0x03, FIFO);

do {
		udelay(100);
		status = sun_pci_fd_sensei(port);
	} while (((status & 0xc0) == 0x80) && --timeout);

if (!timeout)
		ready = 0;
	else
		ready = (status & 0x10) ? 0 : 1;

sun_pci_fd_reset(port);
	return ready;
}
#undef FIFO
#undef MSR
#undef DOR

static int __init ebus_fdthree_p(struct device_node *dp)
{
	if (of_node_name_eq(dp, "fdthree"))
		return 1;
	if (of_node_name_eq(dp, "floppy")) {
		const char *compat;

compat = of_get_property(dp, "compatible", NULL);
		if (compat && !strcmp(compat, "fdthree"))
			return 1;
	}
	return 0;
}

static unsigned long __init sun_floppy_init(void)
{
	static int initialized = 0;
	struct device_node *dp;
	struct platform_device *op;
	const char *prop;
	char state[128];

if (initialized)
		return sun_floppy_types[0];
	initialized = 1;

op = NULL;

for_each_node_by_name(dp, "SUNW,fdtwo") {
		if (!of_node_name_eq(dp->parent, "sbus"))
			continue;
		op = of_find_device_by_node(dp);
		if (op)
			break;
	}
	if (op) {
		floppy_op = op;
		FLOPPY_IRQ = op->archdata.irqs[0];
	} else {
		struct device_node *ebus_dp;
		void __iomem *auxio_reg;
		const char *state_prop;
		unsigned long config;

dp = NULL;
		for_each_node_by_name(ebus_dp, "ebus") {
			for (dp = ebus_dp->child; dp; dp = dp->sibling) {
				if (ebus_fdthree_p(dp))
					goto found_fdthree;
			}
		}
	found_fdthree:
		if (!dp)
			return 0;

op = of_find_device_by_node(dp);
		if (!op)
			return 0;

state_prop = of_get_property(op->dev.of_node, "status", NULL);
		if (state_prop && !strncmp(state_prop, "disabled", 8))
			return 0;

FLOPPY_IRQ = op->archdata.irqs[0];

/* Make sure the high density bit is set, some systems
		 * (most notably Ultra5/Ultra10) come up with it clear.
		 */
		auxio_reg = (void __iomem *) op->resource[2].start;
		writel(readl(auxio_reg)|0x2, auxio_reg);

sun_floppy_dev = &op->dev;

spin_lock_init(&sun_pci_fd_ebus_dma.lock);

/* XXX ioremap */
		sun_pci_fd_ebus_dma.regs = (void __iomem *)
			op->resource[1].start;
		if (!sun_pci_fd_ebus_dma.regs)
			return 0;

sun_pci_fd_ebus_dma.flags = (EBUS_DMA_FLAG_USE_EBDMA_HANDLER |
					     EBUS_DMA_FLAG_TCI_DISABLE);
		sun_pci_fd_ebus_dma.callback = sun_pci_fd_dma_callback;
		sun_pci_fd_ebus_dma.client_cookie = NULL;
		sun_pci_fd_ebus_dma.irq = FLOPPY_IRQ;
		strcpy(sun_pci_fd_ebus_dma.name, "floppy");
		if (ebus_dma_register(&sun_pci_fd_ebus_dma))
			return 0;

/* XXX ioremap */
		sun_fdc = (struct sun_flpy_controller *) op->resource[0].start;

sun_fdops.fd_inb = sun_pci_fd_inb;
		sun_fdops.fd_outb = sun_pci_fd_outb;

can_use_virtual_dma = use_virtual_dma = 0;
		sun_fdops.fd_enable_dma = sun_pci_fd_enable_dma;
		sun_fdops.fd_disable_dma = sun_pci_fd_disable_dma;
		sun_fdops.fd_set_dma_mode = sun_pci_fd_set_dma_mode;
		sun_fdops.fd_set_dma_addr = sun_pci_fd_set_dma_addr;
		sun_fdops.fd_set_dma_count = sun_pci_fd_set_dma_count;
		sun_fdops.get_dma_residue = sun_pci_get_dma_residue;

sun_fdops.fd_request_irq = sun_pci_fd_request_irq;
		sun_fdops.fd_free_irq = sun_pci_fd_free_irq;

sun_fdops.fd_eject = sun_pci_fd_eject;

fdc_status = (unsigned long) &sun_fdc->status_82077;

/*
		 * XXX: Find out on which machines this is really needed.
		 */
		if (1) {
			sun_pci_broken_drive = 1;
			sun_fdops.fd_outb = sun_pci_fd_broken_outb;
		}

allowed_drive_mask = 0;
		if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 0))
			sun_floppy_types[0] = 4;
		if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 1))
			sun_floppy_types[1] = 4;

/*
		 * Find NS87303 SuperIO config registers (through ecpp).
		 */
		config = 0;
		for (dp = ebus_dp->child; dp; dp = dp->sibling) {
			if (of_node_name_eq(dp, "ecpp")) {
				struct platform_device *ecpp_op;

ecpp_op = of_find_device_by_node(dp);
				if (ecpp_op)
					config = ecpp_op->resource[1].start;
				goto config_done;
			}
		}
	config_done:

/*
		 * Sanity check, is this really the NS87303?
		 */
		switch (config & 0x3ff) {
		case 0x02e:
		case 0x15c:
		case 0x26e:
		case 0x398:
			break;
		default:
			config = 0;
		}

if (!config)
			return sun_floppy_types[0];

/* Enable PC-AT mode. */
		ns87303_modify(config, ASC, 0, 0xc0);

#ifdef PCI_FDC_SWAP_DRIVES
		/*
		 * If only Floppy 1 is present, swap drives.
		 */
		if (!sun_floppy_types[0] && sun_floppy_types[1]) {
			/*
			 * Set the drive exchange bit in FCR on NS87303,
			 * make sure other bits are sane before doing so.
			 */
			ns87303_modify(config, FER, FER_EDM, 0);
			ns87303_modify(config, ASC, ASC_DRV2_SEL, 0);
			ns87303_modify(config, FCR, 0, FCR_LDE);

config = sun_floppy_types[0];
			sun_floppy_types[0] = sun_floppy_types[1];
			sun_floppy_types[1] = config;

if (sun_pci_broken_drive != -1) {
				sun_pci_broken_drive = 1 - sun_pci_broken_drive;
				sun_fdops.fd_outb = sun_pci_fd_lde_broken_outb;
			}
		}
#endif /* PCI_FDC_SWAP_DRIVES */

return sun_floppy_types[0];
	}
	prop = of_get_property(op->dev.of_node, "status", NULL);
	if (prop && !strncmp(state, "disabled", 8))
		return 0;

/*
	 * We cannot do of_ioremap here: it does request_region,
	 * which the generic floppy driver tries to do once again.
	 * But we must use the sdev resource values as they have
	 * had parent ranges applied.
	 */
	sun_fdc = (struct sun_flpy_controller *)
		(op->resource[0].start +
		 ((op->resource[0].flags & 0x1ffUL) << 32UL));

/* Last minute sanity check... */
	if (sbus_readb(&sun_fdc->status1_82077) == 0xff) {
		sun_fdc = (struct sun_flpy_controller *)-1;
		return 0;
	}

sun_fdops.fd_inb = sun_82077_fd_inb;
        sun_fdops.fd_outb = sun_82077_fd_outb;

can_use_virtual_dma = use_virtual_dma = 1;
	sun_fdops.fd_enable_dma = sun_fd_enable_dma;
	sun_fdops.fd_disable_dma = sun_fd_disable_dma;
	sun_fdops.fd_set_dma_mode = sun_fd_set_dma_mode;
	sun_fdops.fd_set_dma_addr = sun_fd_set_dma_addr;
	sun_fdops.fd_set_dma_count = sun_fd_set_dma_count;
	sun_fdops.get_dma_residue = sun_get_dma_residue;

sun_fdops.fd_request_irq = sun_fd_request_irq;
	sun_fdops.fd_free_irq = sun_fd_free_irq;

sun_fdops.fd_eject = sun_fd_eject;

fdc_status = (unsigned long) &sun_fdc->status_82077;

/* Success... */
	allowed_drive_mask = 0x01;
	sun_floppy_types[0] = 4;
	sun_floppy_types[1] = 0;

return sun_floppy_types[0];
}

#define EXTRA_FLOPPY_PARAMS

static DEFINE_SPINLOCK(dma_spin_lock);

#define claim_dma_lock() \
({	unsigned long flags; \
	spin_lock_irqsave(&dma_spin_lock, flags); \
	flags; \
})

#define release_dma_lock(__flags) \
	spin_unlock_irqrestore(&dma_spin_lock, __flags);

#endif /* !(__ASM_SPARC64_FLOPPY_H) */

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