[deliverable/linux.git] / arch / sparc / include / asm / floppy_32.h

/* asm/floppy.h: Sparc specific parts of the Floppy driver.
 *
 * Copyright (C) 1995 David S. Miller (davem@davemloft.net)
 */

#ifndef __ASM_SPARC_FLOPPY_H
#define __ASM_SPARC_FLOPPY_H

#include <linux/of.h>
#include <linux/of_device.h>

#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/idprom.h>
#include <asm/oplib.h>
#include <asm/auxio.h>
#include <asm/irq.h>

/* We don't need no stinkin' I/O port allocation crap. */
#undef release_region
#undef request_region
#define release_region(X, Y)	do { } while(0)
#define request_region(X, Y, Z)	(1)

/* References:
 * 1) Netbsd Sun floppy driver.
 * 2) NCR 82077 controller manual
 * 3) Intel 82077 controller manual
 */
struct sun_flpy_controller {
	volatile unsigned char status_82072;  /* Main Status reg. */
#define dcr_82072              status_82072   /* Digital Control reg. */
#define status1_82077          status_82072   /* Auxiliary Status reg. 1 */

	volatile unsigned char data_82072;    /* Data fifo. */
#define status2_82077          data_82072     /* Auxiliary Status reg. 2 */

	volatile unsigned char dor_82077;     /* Digital Output reg. */
	volatile unsigned char tapectl_82077; /* What the? 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 a SparcStation anyways. */
static struct sun_flpy_controller *sun_fdc = NULL;
extern volatile unsigned char *fdc_status;

struct sun_floppy_ops {
	unsigned char (*fd_inb)(int port);
	void (*fd_outb)(unsigned char value, int port);
};

static struct sun_floppy_ops sun_fdops;

#define fd_inb(port)              sun_fdops.fd_inb(port)
#define fd_outb(value,port)       sun_fdops.fd_outb(value,port)
#define fd_enable_dma()           sun_fd_enable_dma()
#define fd_disable_dma()          sun_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_fd_set_dma_mode(mode)
#define fd_set_dma_addr(addr)     sun_fd_set_dma_addr(addr)
#define fd_set_dma_count(count)   sun_fd_set_dma_count(count)
#define fd_enable_irq()           /* nothing... */
#define fd_disable_irq()          /* nothing... */
#define fd_cacheflush(addr, size) /* nothing... */
#define fd_request_irq()          sun_fd_request_irq()
#define fd_free_irq()             /* nothing... */
#if 0  /* P3: added by Alain, these cause a MMU corruption. 19960524 XXX */
#define fd_dma_mem_alloc(size)    ((unsigned long) vmalloc(size))
#define fd_dma_mem_free(addr,size) (vfree((void *)(addr)))
#endif

/* XXX This isn't really correct. XXX */
#define get_dma_residue(x)        (0)

#define FLOPPY0_TYPE  4
#define FLOPPY1_TYPE  0

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

/* 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 FDC1                      sun_floppy_init()

#define N_FDC    1
#define N_DRIVE  8

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

/* Routines unique to each controller type on a Sun. */
static void sun_set_dor(unsigned char value, int fdc_82077)
{
	if (fdc_82077)
		sun_fdc->dor_82077 = value;
}

static unsigned char sun_read_dir(void)
{
	return sun_fdc->dir_82077;
}

static unsigned char sun_82072_fd_inb(int port)
{
	udelay(5);
	switch(port & 7) {
	default:
		printk("floppy: Asked to read unknown port %d\n", port);
		panic("floppy: Port bolixed.");
	case 4: /* FD_STATUS */
		return sun_fdc->status_82072 & ~STATUS_DMA;
	case 5: /* FD_DATA */
		return sun_fdc->data_82072;
	case 7: /* FD_DIR */
		return sun_read_dir();
	}
	panic("sun_82072_fd_inb: How did I get here?");
}

static void sun_82072_fd_outb(unsigned char value, int port)
{
	udelay(5);
	switch(port & 7) {
	default:
		printk("floppy: Asked to write to unknown port %d\n", port);
		panic("floppy: Port bolixed.");
	case 2: /* FD_DOR */
		sun_set_dor(value, 0);
		break;
	case 5: /* FD_DATA */
		sun_fdc->data_82072 = value;
		break;
	case 7: /* FD_DCR */
		sun_fdc->dcr_82072 = value;
		break;
	case 4: /* FD_STATUS */
		sun_fdc->status_82072 = value;
		break;
	}
	return;
}

static unsigned char sun_82077_fd_inb(int port)
{
	udelay(5);
	switch(port & 7) {
	default:
		printk("floppy: Asked to read unknown port %d\n", port);
		panic("floppy: Port bolixed.");
	case 0: /* FD_STATUS_0 */
		return sun_fdc->status1_82077;
	case 1: /* FD_STATUS_1 */
		return sun_fdc->status2_82077;
	case 2: /* FD_DOR */
		return sun_fdc->dor_82077;
	case 3: /* FD_TDR */
		return sun_fdc->tapectl_82077;
	case 4: /* FD_STATUS */
		return sun_fdc->status_82077 & ~STATUS_DMA;
	case 5: /* FD_DATA */
		return sun_fdc->data_82077;
	case 7: /* FD_DIR */
		return sun_read_dir();
	}
	panic("sun_82077_fd_inb: How did I get here?");
}

static void sun_82077_fd_outb(unsigned char value, int port)
{
	udelay(5);
	switch(port & 7) {
	default:
		printk("floppy: Asked to write to unknown port %d\n", port);
		panic("floppy: Port bolixed.");
	case 2: /* FD_DOR */
		sun_set_dor(value, 1);
		break;
	case 5: /* FD_DATA */
		sun_fdc->data_82077 = value;
		break;
	case 7: /* FD_DCR */
		sun_fdc->dcr_82077 = value;
		break;
	case 4: /* FD_STATUS */
		sun_fdc->status_82077 = value;
		break;
	case 3: /* FD_TDR */
		sun_fdc->tapectl_82077 = value;
		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
 */
extern char *pdma_vaddr;
extern unsigned long pdma_size;
extern volatile int doing_pdma;

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

/* Common routines to all controller types on the Sparc. */
static inline void virtual_dma_init(void)
{
	/* nothing... */
}

static inline void sun_fd_disable_dma(void)
{
	doing_pdma = 0;
	pdma_base = NULL;
}

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

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

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

extern int sparc_floppy_request_irq(unsigned int irq,
                                    irq_handler_t irq_handler);

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

	if (!once) {
		once = 1;
		return sparc_floppy_request_irq(FLOPPY_IRQ, floppy_interrupt);
	} else {
		return 0;
	}
}

static struct linux_prom_registers fd_regs[2];

static int sun_floppy_init(void)
{
	struct platform_device *op;
	struct device_node *dp;
	struct resource r;
	char state[128];
	phandle fd_node;
	phandle tnode;
	int num_regs;

	use_virtual_dma = 1;

	/* Forget it if we aren't on a machine that could possibly
	 * ever have a floppy drive.
	 */
	if (sparc_cpu_model != sun4m) {
		/* We certainly don't have a floppy controller. */
		goto no_sun_fdc;
	}
	/* Well, try to find one. */
	tnode = prom_getchild(prom_root_node);
	fd_node = prom_searchsiblings(tnode, "obio");
	if (fd_node != 0) {
		tnode = prom_getchild(fd_node);
		fd_node = prom_searchsiblings(tnode, "SUNW,fdtwo");
	} else {
		fd_node = prom_searchsiblings(tnode, "fd");
	}
	if (fd_node == 0) {
		goto no_sun_fdc;
	}

	/* The sun4m lets us know if the controller is actually usable. */
	if (prom_getproperty(fd_node, "status", state, sizeof(state)) != -1) {
		if(!strcmp(state, "disabled")) {
			goto no_sun_fdc;
		}
	}
	num_regs = prom_getproperty(fd_node, "reg", (char *) fd_regs, sizeof(fd_regs));
	num_regs = (num_regs / sizeof(fd_regs[0]));
	prom_apply_obio_ranges(fd_regs, num_regs);
	memset(&r, 0, sizeof(r));
	r.flags = fd_regs[0].which_io;
	r.start = fd_regs[0].phys_addr;
	sun_fdc = of_ioremap(&r, 0, fd_regs[0].reg_size, "floppy");

	/* Look up irq in platform_device.
	 * We try "SUNW,fdtwo" and "fd"
	 */
	op = NULL;
	for_each_node_by_name(dp, "SUNW,fdtwo") {
		op = of_find_device_by_node(dp);
		if (op)
			break;
	}
	if (!op) {
		for_each_node_by_name(dp, "fd") {
			op = of_find_device_by_node(dp);
			if (op)
				break;
		}
	}
	if (!op)
		goto no_sun_fdc;

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

	/* Last minute sanity check... */
	if (sun_fdc->status_82072 == 0xff) {
		sun_fdc = NULL;
		goto no_sun_fdc;
	}

	sun_fdops.fd_inb = sun_82077_fd_inb;
	sun_fdops.fd_outb = sun_82077_fd_outb;
	fdc_status = &sun_fdc->status_82077;

	if (sun_fdc->dor_82077 == 0x80) {
		sun_fdc->dor_82077 = 0x02;
		if (sun_fdc->dor_82077 == 0x80) {
			sun_fdops.fd_inb = sun_82072_fd_inb;
			sun_fdops.fd_outb = sun_82072_fd_outb;
			fdc_status = &sun_fdc->status_82072;
		}
	}

	/* Success... */
	allowed_drive_mask = 0x01;
	return (int) sun_fdc;

no_sun_fdc:
	return -1;
}

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

#define fd_eject(drive) sparc_eject()

#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_SPARC_FLOPPY_H) */
Commit	Line	Data
a439fe51	1	/* asm/floppy.h: Sparc specific parts of the Floppy driver.
f5e706ad SR	2	*
	3	* Copyright (C) 1995 David S. Miller (davem@davemloft.net)
	4	*/
	5
	6	#ifndef __ASM_SPARC_FLOPPY_H
	7	#define __ASM_SPARC_FLOPPY_H
	8
454eeb2d DM	9	#include <linux/of.h>
	10	#include <linux/of_device.h>
	11
f5e706ad SR	12	#include <asm/page.h>
f5e706ad SR	13	#include <asm/pgtable.h>
f5e706ad	14	#include <asm/idprom.h>
f5e706ad SR	15	#include <asm/oplib.h>
	16	#include <asm/auxio.h>
	17	#include <asm/irq.h>
	18
	19	/* We don't need no stinkin' I/O port allocation crap. */
	20	#undef release_region
	21	#undef request_region
	22	#define release_region(X, Y) do { } while(0)
	23	#define request_region(X, Y, Z) (1)
	24
	25	/* References:
	26	* 1) Netbsd Sun floppy driver.
	27	* 2) NCR 82077 controller manual
	28	* 3) Intel 82077 controller manual
	29	*/
	30	struct sun_flpy_controller {
	31	volatile unsigned char status_82072; /* Main Status reg. */
	32	#define dcr_82072 status_82072 /* Digital Control reg. */
	33	#define status1_82077 status_82072 /* Auxiliary Status reg. 1 */
	34
	35	volatile unsigned char data_82072; /* Data fifo. */
	36	#define status2_82077 data_82072 /* Auxiliary Status reg. 2 */
	37
	38	volatile unsigned char dor_82077; /* Digital Output reg. */
	39	volatile unsigned char tapectl_82077; /* What the? Tape control reg? */
	40
	41	volatile unsigned char status_82077; /* Main Status Register. */
	42	#define drs_82077 status_82077 /* Digital Rate Select reg. */
	43
	44	volatile unsigned char data_82077; /* Data fifo. */
	45	volatile unsigned char ___unused;
	46	volatile unsigned char dir_82077; /* Digital Input reg. */
	47	#define dcr_82077 dir_82077 /* Config Control reg. */
	48	};
	49
	50	/* You'll only ever find one controller on a SparcStation anyways. */
	51	static struct sun_flpy_controller *sun_fdc = NULL;
	52	extern volatile unsigned char *fdc_status;
	53
	54	struct sun_floppy_ops {
	55	unsigned char (*fd_inb)(int port);
	56	void (*fd_outb)(unsigned char value, int port);
	57	};
	58
	59	static struct sun_floppy_ops sun_fdops;
	60
	61	#define fd_inb(port) sun_fdops.fd_inb(port)
	62	#define fd_outb(value,port) sun_fdops.fd_outb(value,port)
	63	#define fd_enable_dma() sun_fd_enable_dma()
	64	#define fd_disable_dma() sun_fd_disable_dma()
	65	#define fd_request_dma() (0) /* nothing... */
	66	#define fd_free_dma() /* nothing... */
	67	#define fd_clear_dma_ff() /* nothing... */
	68	#define fd_set_dma_mode(mode) sun_fd_set_dma_mode(mode)
	69	#define fd_set_dma_addr(addr) sun_fd_set_dma_addr(addr)
	70	#define fd_set_dma_count(count) sun_fd_set_dma_count(count)
	71	#define fd_enable_irq() /* nothing... */
	72	#define fd_disable_irq() /* nothing... */
	73	#define fd_cacheflush(addr, size) /* nothing... */
	74	#define fd_request_irq() sun_fd_request_irq()
	75	#define fd_free_irq() /* nothing... */
	76	#if 0 /* P3: added by Alain, these cause a MMU corruption. 19960524 XXX */
	77	#define fd_dma_mem_alloc(size) ((unsigned long) vmalloc(size))
	78	#define fd_dma_mem_free(addr,size) (vfree((void *)(addr)))
79	#endif
80
81	/* XXX This isn't really correct. XXX */
82	#define get_dma_residue(x) (0)
83
84	#define FLOPPY0_TYPE 4
85	#define FLOPPY1_TYPE 0
86
87	/* Super paranoid... */
88	#undef HAVE_DISABLE_HLT
89
90	/* Here is where we catch the floppy driver trying to initialize,
91	* therefore this is where we call the PROM device tree probing
92	* routine etc. on the Sparc.
93	*/
94	#define FDC1 sun_floppy_init()
95
96	#define N_FDC 1
97	#define N_DRIVE 8
98
99	/* No 64k boundary crossing problems on the Sparc. */
100	#define CROSS_64KB(a,s) (0)
101
102	/* Routines unique to each controller type on a Sun. */
103	static void sun_set_dor(unsigned char value, int fdc_82077)
104	{
0301a6cb	105	if (fdc_82077)
f5e706ad	106	sun_fdc->dor_82077 = value;
f5e706ad SR	107	}
	108
	109	static unsigned char sun_read_dir(void)
	110	{
0301a6cb	111	return sun_fdc->dir_82077;
f5e706ad SR	112	}
	113
	114	static unsigned char sun_82072_fd_inb(int port)
	115	{
	116	udelay(5);
	117	switch(port & 7) {
	118	default:
	119	printk("floppy: Asked to read unknown port %d\n", port);
	120	panic("floppy: Port bolixed.");
	121	case 4: /* FD_STATUS */
	122	return sun_fdc->status_82072 & ~STATUS_DMA;
	123	case 5: /* FD_DATA */
	124	return sun_fdc->data_82072;
	125	case 7: /* FD_DIR */
	126	return sun_read_dir();
6cb79b3f	127	}
f5e706ad SR	128	panic("sun_82072_fd_inb: How did I get here?");
	129	}
	130
	131	static void sun_82072_fd_outb(unsigned char value, int port)
	132	{
	133	udelay(5);
	134	switch(port & 7) {
	135	default:
	136	printk("floppy: Asked to write to unknown port %d\n", port);
	137	panic("floppy: Port bolixed.");
	138	case 2: /* FD_DOR */
	139	sun_set_dor(value, 0);
	140	break;
	141	case 5: /* FD_DATA */
	142	sun_fdc->data_82072 = value;
	143	break;
	144	case 7: /* FD_DCR */
	145	sun_fdc->dcr_82072 = value;
	146	break;
	147	case 4: /* FD_STATUS */
	148	sun_fdc->status_82072 = value;
	149	break;
6cb79b3f	150	}
f5e706ad SR	151	return;
	152	}
	153
	154	static unsigned char sun_82077_fd_inb(int port)
	155	{
	156	udelay(5);
	157	switch(port & 7) {
	158	default:
	159	printk("floppy: Asked to read unknown port %d\n", port);
	160	panic("floppy: Port bolixed.");
	161	case 0: /* FD_STATUS_0 */
	162	return sun_fdc->status1_82077;
	163	case 1: /* FD_STATUS_1 */
	164	return sun_fdc->status2_82077;
	165	case 2: /* FD_DOR */
	166	return sun_fdc->dor_82077;
	167	case 3: /* FD_TDR */
	168	return sun_fdc->tapectl_82077;
	169	case 4: /* FD_STATUS */
	170	return sun_fdc->status_82077 & ~STATUS_DMA;
	171	case 5: /* FD_DATA */
	172	return sun_fdc->data_82077;
	173	case 7: /* FD_DIR */
	174	return sun_read_dir();
6cb79b3f	175	}
f5e706ad SR	176	panic("sun_82077_fd_inb: How did I get here?");
	177	}
	178
	179	static void sun_82077_fd_outb(unsigned char value, int port)
	180	{
	181	udelay(5);
	182	switch(port & 7) {
	183	default:
	184	printk("floppy: Asked to write to unknown port %d\n", port);
	185	panic("floppy: Port bolixed.");
	186	case 2: /* FD_DOR */
	187	sun_set_dor(value, 1);
	188	break;
	189	case 5: /* FD_DATA */
	190	sun_fdc->data_82077 = value;
	191	break;
	192	case 7: /* FD_DCR */
	193	sun_fdc->dcr_82077 = value;
	194	break;
	195	case 4: /* FD_STATUS */
	196	sun_fdc->status_82077 = value;
	197	break;
	198	case 3: /* FD_TDR */
	199	sun_fdc->tapectl_82077 = value;
	200	break;
6cb79b3f	201	}
f5e706ad SR	202	return;
	203	}
	204
	205	/* For pseudo-dma (Sun floppy drives have no real DMA available to
	206	* them so we must eat the data fifo bytes directly ourselves) we have
	207	* three state variables. doing_pdma tells our inline low-level
	208	* assembly floppy interrupt entry point whether it should sit and eat
	209	* bytes from the fifo or just transfer control up to the higher level
	210	* floppy interrupt c-code. I tried very hard but I could not get the
	211	* pseudo-dma to work in c-code without getting many overruns and
	212	* underruns. If non-zero, doing_pdma encodes the direction of
	213	* the transfer for debugging. 1=read 2=write
	214	*/
	215	extern char *pdma_vaddr;
	216	extern unsigned long pdma_size;
	217	extern volatile int doing_pdma;
	218
	219	/* This is software state */
	220	extern char *pdma_base;
	221	extern unsigned long pdma_areasize;
	222
	223	/* Common routines to all controller types on the Sparc. */
	224	static inline void virtual_dma_init(void)
	225	{
	226	/* nothing... */
	227	}
	228
	229	static inline void sun_fd_disable_dma(void)
	230	{
	231	doing_pdma = 0;
679bea5e	232	pdma_base = NULL;
f5e706ad SR	233	}
	234
	235	static inline void sun_fd_set_dma_mode(int mode)
	236	{
	237	switch(mode) {
	238	case DMA_MODE_READ:
	239	doing_pdma = 1;
	240	break;
	241	case DMA_MODE_WRITE:
	242	doing_pdma = 2;
	243	break;
	244	default:
	245	printk("Unknown dma mode %d\n", mode);
	246	panic("floppy: Giving up...");
	247	}
	248	}
	249
	250	static inline void sun_fd_set_dma_addr(char *buffer)
	251	{
	252	pdma_vaddr = buffer;
	253	}
	254
	255	static inline void sun_fd_set_dma_count(int length)
	256	{
	257	pdma_size = length;
	258	}
	259
	260	static inline void sun_fd_enable_dma(void)
	261	{
f5e706ad SR	262	pdma_base = pdma_vaddr;
	263	pdma_areasize = pdma_size;
	264	}
	265
6baa9b20 SR	266	extern int sparc_floppy_request_irq(unsigned int irq,
6baa9b20 SR	267	irq_handler_t irq_handler);
f5e706ad SR	268
	269	static int sun_fd_request_irq(void)
	270	{
	271	static int once = 0;
f5e706ad	272
6baa9b20	273	if (!once) {
f5e706ad	274	once = 1;
6baa9b20 SR	275	return sparc_floppy_request_irq(FLOPPY_IRQ, floppy_interrupt);
	276	} else {
	277	return 0;
	278	}
f5e706ad SR	279	}
	280
	281	static struct linux_prom_registers fd_regs[2];
	282
	283	static int sun_floppy_init(void)
	284	{
6baa9b20 SR	285	struct platform_device *op;
6baa9b20 SR	286	struct device_node *dp;
144e988d	287	struct resource r;
f5e706ad	288	char state[128];
144e988d SR	289	phandle fd_node;
144e988d SR	290	phandle tnode;
8d125562	291	int num_regs;
f5e706ad SR	292
	293	use_virtual_dma = 1;
	294
f5e706ad SR	295	/* Forget it if we aren't on a machine that could possibly
	296	* ever have a floppy drive.
	297	*/
58fa4dcb	298	if (sparc_cpu_model != sun4m) {
f5e706ad SR	299	/* We certainly don't have a floppy controller. */
	300	goto no_sun_fdc;
	301	}
	302	/* Well, try to find one. */
	303	tnode = prom_getchild(prom_root_node);
	304	fd_node = prom_searchsiblings(tnode, "obio");
144e988d	305	if (fd_node != 0) {
f5e706ad SR	306	tnode = prom_getchild(fd_node);
	307	fd_node = prom_searchsiblings(tnode, "SUNW,fdtwo");
	308	} else {
	309	fd_node = prom_searchsiblings(tnode, "fd");
	310	}
144e988d	311	if (fd_node == 0) {
f5e706ad SR	312	goto no_sun_fdc;
	313	}
	314
	315	/* The sun4m lets us know if the controller is actually usable. */
144e988d	316	if (prom_getproperty(fd_node, "status", state, sizeof(state)) != -1) {
f5e706ad SR	317	if(!strcmp(state, "disabled")) {
	318	goto no_sun_fdc;
	319	}
	320	}
	321	num_regs = prom_getproperty(fd_node, "reg", (char *) fd_regs, sizeof(fd_regs));
	322	num_regs = (num_regs / sizeof(fd_regs[0]));
	323	prom_apply_obio_ranges(fd_regs, num_regs);
	324	memset(&r, 0, sizeof(r));
	325	r.flags = fd_regs[0].which_io;
	326	r.start = fd_regs[0].phys_addr;
144e988d	327	sun_fdc = of_ioremap(&r, 0, fd_regs[0].reg_size, "floppy");
f5e706ad	328
6baa9b20 SR	329	/* Look up irq in platform_device.
	330	* We try "SUNW,fdtwo" and "fd"
	331	*/
918f8322	332	op = NULL;
6baa9b20 SR	333	for_each_node_by_name(dp, "SUNW,fdtwo") {
	334	op = of_find_device_by_node(dp);
	335	if (op)
	336	break;
	337	}
	338	if (!op) {
	339	for_each_node_by_name(dp, "fd") {
	340	op = of_find_device_by_node(dp);
	341	if (op)
	342	break;
	343	}
	344	}
	345	if (!op)
	346	goto no_sun_fdc;
	347
	348	FLOPPY_IRQ = op->archdata.irqs[0];
	349
f5e706ad	350	/* Last minute sanity check... */
144e988d	351	if (sun_fdc->status_82072 == 0xff) {
f5e706ad SR	352	sun_fdc = NULL;
	353	goto no_sun_fdc;
	354	}
	355
	356	sun_fdops.fd_inb = sun_82077_fd_inb;
	357	sun_fdops.fd_outb = sun_82077_fd_outb;
	358	fdc_status = &sun_fdc->status_82077;
	359
	360	if (sun_fdc->dor_82077 == 0x80) {
	361	sun_fdc->dor_82077 = 0x02;
	362	if (sun_fdc->dor_82077 == 0x80) {
	363	sun_fdops.fd_inb = sun_82072_fd_inb;
	364	sun_fdops.fd_outb = sun_82072_fd_outb;
	365	fdc_status = &sun_fdc->status_82072;
	366	}
	367	}
	368
	369	/* Success... */
	370	allowed_drive_mask = 0x01;
	371	return (int) sun_fdc;
	372
	373	no_sun_fdc:
	374	return -1;
	375	}
	376
	377	static int sparc_eject(void)
	378	{
	379	set_dor(0x00, 0xff, 0x90);
	380	udelay(500);
	381	set_dor(0x00, 0x6f, 0x00);
	382	udelay(500);
	383	return 0;
	384	}
	385
	386	#define fd_eject(drive) sparc_eject()
	387
	388	#define EXTRA_FLOPPY_PARAMS
	389
334ae614 DM	390	static DEFINE_SPINLOCK(dma_spin_lock);
	391
	392	#define claim_dma_lock() \
	393	({ unsigned long flags; \
	394	spin_lock_irqsave(&dma_spin_lock, flags); \
	395	flags; \
	396	})
	397
	398	#define release_dma_lock(__flags) \
	399	spin_unlock_irqrestore(&dma_spin_lock, __flags);
	400
f5e706ad	401	#endif /* !(__ASM_SPARC_FLOPPY_H) */