Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 811 insertions, 0 deletions

diff --git a/include/asm-sparc64/floppy.h b/include/asm-sparc64/floppy.h
new file mode 100644
index 000000000000..e071b4b4edfd
--- /dev/null
+++ b/include/asm-sparc64/floppy.h
@@ -0,0 +1,811 @@
+/* $Id: floppy.h,v 1.32 2001/10/26 17:59:36 davem Exp $
+ * asm-sparc64/floppy.h: Sparc specific parts of the Floppy driver.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
+ * 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/config.h>
+#include <linux/init.h>
+
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/system.h>
+#include <asm/idprom.h>
+#include <asm/oplib.h>
+#include <asm/auxio.h>
+#include <asm/sbus.h>
+#include <asm/irq.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 sbus_dev *floppy_sdev = NULL;
+
+struct sun_floppy_ops {
+        unsigned char   (*fd_inb) (unsigned long port);
+        void            (*fd_outb) (unsigned char value, unsigned long port);
+        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(port)              sun_fdops.fd_inb(port)
+#define fd_outb(value,port)       sun_fdops.fd_outb(value,port)
+#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_cacheflush(addr, size) /* nothing... */
+#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)
+
+static int FLOPPY_MOTOR_MASK = 0x10;
+
+/* 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 port)
+{
+        udelay(5);
+        switch(port & 7) {
+        default:
+                printk("floppy: Asked to read unknown port %lx\n", port);
+                panic("floppy: Port bolixed.");
+        case 4: /* FD_STATUS */
+                return sbus_readb(&sun_fdc->status_82077) & ~STATUS_DMA;
+        case 5: /* FD_DATA */
+                return sbus_readb(&sun_fdc->data_82077);
+        case 7: /* 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 port)
+{
+        udelay(5);
+        switch(port & 7) {
+        default:
+                printk("floppy: Asked to write to unknown port %lx\n", port);
+                panic("floppy: Port bolixed.");
+        case 2: /* FD_DOR */
+                /* Happily, the 82077 has a real DOR register. */
+                sbus_writeb(value, &sun_fdc->dor_82077);
+                break;
+        case 5: /* FD_DATA */
+                sbus_writeb(value, &sun_fdc->data_82077);
+                break;
+        case 7: /* FD_DCR */
+                sbus_writeb(value, &sun_fdc->dcr_82077);
+                break;
+        case 4: /* FD_STATUS */
+                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
+ */
+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;
+        if (pdma_base) {
+                mmu_unlockarea(pdma_base, pdma_areasize);
+                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_vaddr = mmu_lockarea(pdma_vaddr, pdma_size);
+        pdma_base = pdma_vaddr;
+        pdma_areasize = pdma_size;
+}
+
+/* Our low-level entry point in arch/sparc/kernel/entry.S */
+extern irqreturn_t floppy_hardint(int irq, void *unused, struct pt_regs *regs);
+
+static int sun_fd_request_irq(void)
+{
+        static int once = 0;
+        int error;
+
+        if(!once) {
+                once = 1;
+
+                error = request_fast_irq(FLOPPY_IRQ, floppy_hardint, 
+                                         SA_INTERRUPT, "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;
+}
+
+#ifdef CONFIG_PCI
+#include <asm/ebus.h>
+#include <asm/isa.h>
+#include <asm/ns87303.h>
+
+static struct ebus_dma_info sun_pci_fd_ebus_dma;
+static struct pci_dev *sun_pci_ebus_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};
+
+extern irqreturn_t floppy_interrupt(int irq, void *dev_id, struct pt_regs *regs);
+
+static unsigned char sun_pci_fd_inb(unsigned long port)
+{
+        udelay(5);
+        return inb(port);
+}
+
+static void sun_pci_fd_outb(unsigned char val, unsigned long port)
+{
+        udelay(5);
+        outb(val, port);
+}
+
+static void sun_pci_fd_broken_outb(unsigned char val, unsigned long port)
+{
+        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 (port == ((unsigned long)sun_fdc) + 2) {
+                if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x20)) {
+                        val |= 0x10;
+                }
+        }
+        outb(val, port);
+}
+
+#ifdef PCI_FDC_SWAP_DRIVES
+static void sun_pci_fd_lde_broken_outb(unsigned char val, unsigned long port)
+{
+        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 (port == ((unsigned long)sun_fdc) + 2) {
+                if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x10)) {
+                        val &= ~(0x03);
+                        val |= 0x21;
+                }
+        }
+        outb(val, port);
+}
+#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 = 
+                pci_map_single(sun_pci_ebus_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)
+                pci_unmap_single(sun_pci_ebus_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 = PCI_DMA_TODEVICE;
+        else
+                sun_pci_dma_pending.direction = PCI_DMA_FROMDEVICE;
+
+        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, 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
+
+#endif /* CONFIG_PCI */
+
+#ifdef CONFIG_PCI
+static int __init ebus_fdthree_p(struct linux_ebus_device *edev)
+{
+        if (!strcmp(edev->prom_name, "fdthree"))
+                return 1;
+        if (!strcmp(edev->prom_name, "floppy")) {
+                char compat[16];
+                prom_getstring(edev->prom_node,
+                               "compatible",
+                               compat, sizeof(compat));
+                compat[15] = '\0';
+                if (!strcmp(compat, "fdthree"))
+                        return 1;
+        }
+        return 0;
+}
+#endif
+
+#ifdef CONFIG_PCI
+#undef ISA_FLOPPY_WORKS
+
+#ifdef ISA_FLOPPY_WORKS
+static unsigned long __init isa_floppy_init(void)
+{
+        struct sparc_isa_bridge *isa_br;
+        struct sparc_isa_device *isa_dev = NULL;
+
+        for_each_isa(isa_br) {
+                for_each_isadev(isa_dev, isa_br) {
+                        if (!strcmp(isa_dev->prom_name, "dma")) {
+                                struct sparc_isa_device *child =
+                                        isa_dev->child;
+
+                                while (child) {
+                                        if (!strcmp(child->prom_name,
+                                                    "floppy")) {
+                                                isa_dev = child;
+                                                goto isa_done;
+                                        }
+                                        child = child->next;
+                                }
+                        }
+                }
+        }
+isa_done:
+        if (!isa_dev)
+                return 0;
+
+        /* We could use DMA on devices behind the ISA bridge, but...
+         *
+         * There is a slight problem.  Normally on x86 kit the x86 processor
+         * delays I/O port instructions when the ISA bus "dma in progress"
+         * signal is active.  Well, sparc64 systems do not monitor this
+         * signal thus we would need to block all I/O port accesses in software
+         * when a dma transfer is active for some device.
+         */
+
+        sun_fdc = (struct sun_flpy_controller *)isa_dev->resource.start;
+        FLOPPY_IRQ = isa_dev->irq;
+
+        sun_fdops.fd_inb = sun_pci_fd_inb;
+        sun_fdops.fd_outb = sun_pci_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;
+
+        /* Floppy eject is manual.   Actually, could determine this
+         * via presence of 'manual' property in OBP node.
+         */
+        sun_fdops.fd_eject = sun_pci_fd_eject;
+
+        fdc_status = (unsigned long) &sun_fdc->status_82077;
+        FLOPPY_MOTOR_MASK = 0xf0;
+
+        allowed_drive_mask = 0;
+        sun_floppy_types[0] = 0;
+        sun_floppy_types[1] = 4;
+
+        sun_pci_broken_drive = 1;
+        sun_fdops.fd_outb = sun_pci_fd_broken_outb;
+
+        return sun_floppy_types[0];
+}
+#endif /* ISA_FLOPPY_WORKS */
+
+#endif
+
+static unsigned long __init sun_floppy_init(void)
+{
+        char state[128];
+        struct sbus_bus *bus;
+        struct sbus_dev *sdev = NULL;
+        static int initialized = 0;
+
+        if (initialized)
+                return sun_floppy_types[0];
+        initialized = 1;
+
+        for_all_sbusdev (sdev, bus) {
+                if (!strcmp(sdev->prom_name, "SUNW,fdtwo")) 
+                        break;
+        }
+        if(sdev) {
+                floppy_sdev = sdev;
+                FLOPPY_IRQ = sdev->irqs[0];
+        } else {
+#ifdef CONFIG_PCI
+                struct linux_ebus *ebus;
+                struct linux_ebus_device *edev = NULL;
+                unsigned long config = 0;
+                unsigned long auxio_reg;
+
+                for_each_ebus(ebus) {
+                        for_each_ebusdev(edev, ebus) {
+                                if (ebus_fdthree_p(edev))
+                                        goto ebus_done;
+                        }
+                }
+        ebus_done:
+                if (!edev) {
+#ifdef ISA_FLOPPY_WORKS
+                        return isa_floppy_init();
+#else
+                        return 0;
+#endif
+                }
+
+                prom_getproperty(edev->prom_node, "status",
+                                 state, sizeof(state));
+                if (!strncmp(state, "disabled", 8))
+                        return 0;
+                        
+                FLOPPY_IRQ = edev->irqs[0];
+
+                /* Make sure the high density bit is set, some systems
+                 * (most notably Ultra5/Ultra10) come up with it clear.
+                 */
+                auxio_reg = edev->resource[2].start;
+                writel(readl(auxio_reg)|0x2, auxio_reg);
+
+                sun_pci_ebus_dev = ebus->self;
+
+                spin_lock_init(&sun_pci_fd_ebus_dma.lock);
+
+                /* XXX ioremap */
+                sun_pci_fd_ebus_dma.regs = edev->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 *)edev->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;
+                FLOPPY_MOTOR_MASK = 0xf0;
+
+                /*
+                 * 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).
+                 */
+                for_each_ebus(ebus) {
+                        for_each_ebusdev(edev, ebus) {
+                                if (!strcmp(edev->prom_name, "ecpp")) {
+                                        config = edev->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 shure 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];
+#else
+                return 0;
+#endif
+        }
+        prom_getproperty(sdev->prom_node, "status", state, sizeof(state));
+        if(!strncmp(state, "disabled", 8))
+                return 0;
+
+        /*
+         * We cannot do sbus_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 *)
+                (sdev->resource[0].start +
+                 ((sdev->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
+
+#endif /* !(__ASM_SPARC64_FLOPPY_H) */