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floppy_64.h

/* floppy.h: Sparc specific parts of the Floppy driver.
 *
 * Copyright (C) 1996, 2007 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/init.h>
#include <linux/pci.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)

/* 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
 */
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;
      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;
}

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,
                            IRQF_DISABLED, "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/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);

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);
}

/*
 * 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_node->name, "fdthree"))
            return 1;
      if (!strcmp(edev->prom_node->name, "floppy")) {
            const char *compat;

            compat = of_get_property(edev->prom_node,
                               "compatible", NULL);
            if (compat && !strcmp(compat, "fdthree"))
                  return 1;
      }
      return 0;
}
#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;
            void __iomem *auxio_reg;
            const char *state_prop;

            for_each_ebus(ebus) {
                  for_each_ebusdev(edev, ebus) {
                        if (ebus_fdthree_p(edev))
                              goto ebus_done;
                  }
            }
      ebus_done:
            if (!edev)
                  return 0;

            state_prop = of_get_property(edev->prom_node, "status", NULL);
            if (state_prop && !strncmp(state_prop, "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 = (void __iomem *) 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 = (void __iomem *)
                  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;

            /*
             * 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_node->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 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];
#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

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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