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/* $Id: floppy.h,v 1.1.1.1 2004-04-15 03:01:10 phoenix 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);
        void            (*fd_enable_irq) (void);
        void            (*fd_disable_irq) (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_enable_irq()           sun_fdops.fd_enable_irq()
#define fd_disable_irq()          sun_fdops.fd_disable_irq()
#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 = 0;
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 = 0;
        }
}
 
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 void 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_enable_irq(void)
{
}
 
static void sun_fd_disable_irq(void)
{
}
 
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 linux_ebus_dma *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 void 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_reset_dma(void)
{
        unsigned int dcsr;
 
        writel(EBUS_DCSR_RESET, &sun_pci_fd_ebus_dma->dcsr);
        udelay(1);
        dcsr = EBUS_DCSR_BURST_SZ_16 | EBUS_DCSR_TCI_DIS |
               EBUS_DCSR_EN_CNT;
        writel(dcsr, (unsigned long)&sun_pci_fd_ebus_dma->dcsr);
}
 
static void sun_pci_fd_enable_dma(void)
{
        unsigned int dcsr;
 
        if((NULL == sun_pci_dma_pending.buf)    ||
           (0    == sun_pci_dma_pending.len)     ||
           (0    == sun_pci_dma_pending.direction)) {
                goto enable; /* TODO: BUG() */
        }
 
        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);
        writel(sun_pci_dma_current.addr, &sun_pci_fd_ebus_dma->dacr);
 
enable:
        dcsr = readl(&sun_pci_fd_ebus_dma->dcsr);
        dcsr |= EBUS_DCSR_EN_DMA;
        writel(dcsr, &sun_pci_fd_ebus_dma->dcsr);
}
 
static void sun_pci_fd_disable_dma(void)
{
        unsigned int dcsr;
 
        dcsr = readl(&sun_pci_fd_ebus_dma->dcsr);
        if (dcsr & EBUS_DCSR_EN_DMA) {
                while (dcsr & EBUS_DCSR_DRAIN) {
                        udelay(1);
                        dcsr = readl(&sun_pci_fd_ebus_dma->dcsr);
                }
                dcsr &= ~(EBUS_DCSR_EN_DMA);
                writel(dcsr, &sun_pci_fd_ebus_dma->dcsr);
                if (dcsr & EBUS_DCSR_ERR_PEND) {
                        sun_pci_fd_reset_dma();
                        dcsr &= ~(EBUS_DCSR_ERR_PEND);
                        writel(dcsr, &sun_pci_fd_ebus_dma->dcsr);
                }
        }
        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)
{
        unsigned int dcsr;
 
        dcsr = readl(&sun_pci_fd_ebus_dma->dcsr);
        if (readl(&sun_pci_fd_ebus_dma->dbcr)) {
                sun_pci_fd_reset_dma();
                writel(dcsr, &sun_pci_fd_ebus_dma->dcsr);
        }
 
        dcsr |= EBUS_DCSR_EN_CNT | EBUS_DCSR_TC;
        /*
         * For EBus WRITE means to system memory, which is
         * READ for us.
         */
        if (mode == DMA_MODE_WRITE) {
                dcsr &= ~(EBUS_DCSR_WRITE);
                sun_pci_dma_pending.direction = PCI_DMA_TODEVICE;
        } else {
                dcsr |= EBUS_DCSR_WRITE;
                sun_pci_dma_pending.direction = PCI_DMA_FROMDEVICE;
        }
        writel(dcsr, &sun_pci_fd_ebus_dma->dcsr);
}
 
static void sun_pci_fd_set_dma_count(int length)
{
        sun_pci_dma_pending.len = length;
        writel(length, &sun_pci_fd_ebus_dma->dbcr);
}
 
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)
{
        unsigned int dcsr, res;
 
        res = readl(&sun_pci_fd_ebus_dma->dbcr);
        if (res != 0) {
                dcsr = readl(&sun_pci_fd_ebus_dma->dcsr);
                sun_pci_fd_reset_dma();
                writel(dcsr, &sun_pci_fd_ebus_dma->dcsr);
        }
        return res;
}
 
static void sun_pci_fd_enable_irq(void)
{
        unsigned int dcsr;
 
        dcsr = readl(&sun_pci_fd_ebus_dma->dcsr);
        dcsr |= EBUS_DCSR_INT_EN;
        writel(dcsr, &sun_pci_fd_ebus_dma->dcsr);
}
 
static void sun_pci_fd_disable_irq(void)
{
        unsigned int dcsr;
 
        dcsr = readl(&sun_pci_fd_ebus_dma->dcsr);
        dcsr &= ~(EBUS_DCSR_INT_EN);
        writel(dcsr, &sun_pci_fd_ebus_dma->dcsr);
}
 
static int sun_pci_fd_request_irq(void)
{
        int err;
 
        err = request_irq(FLOPPY_IRQ, floppy_interrupt, SA_SHIRQ,
                          "floppy", sun_fdc);
        if (err)
                return -1;
        sun_pci_fd_enable_irq();
        return 0;
}
 
static void sun_pci_fd_free_irq(void)
{
        sun_pci_fd_disable_irq();
        free_irq(FLOPPY_IRQ, sun_fdc);
}
 
static int sun_pci_fd_eject(int drive)
{
        return -EINVAL;
}
 
 
/*
 * 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 isa_bridge *isa_br;
        struct 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 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_enable_irq = sun_fd_enable_irq;
        sun_fdops.fd_disable_irq = sun_fd_disable_irq;
        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 = 0;
                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;
 
                sun_fdc = (struct sun_flpy_controller *)edev->resource[0].start;
                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;
 
                sun_pci_fd_ebus_dma = (struct linux_ebus_dma *)
                        edev->resource[1].start;
                sun_pci_fd_reset_dma();
 
                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_enable_irq = sun_pci_fd_enable_irq;
                sun_fdops.fd_disable_irq = sun_pci_fd_disable_irq;
                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_enable_irq = sun_fd_enable_irq;
        sun_fdops.fd_disable_irq = sun_fd_disable_irq;
        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) */
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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [include/] [asm-sparc64/] [floppy.h] - Blame information for rev 1774

Line No.	Rev	Author	Line
1	1276	phoenix	`/* $Id: floppy.h,v 1.1.1.1 2004-04-15 03:01:10 phoenix Exp $`
2			`* asm-sparc64/floppy.h: Sparc specific parts of the Floppy driver.`
3			`*`
4			`* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)`
5			`* Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)`
6			`*`
7			`* Ultra/PCI support added: Sep 1997 Eddie C. Dost (ecd@skynet.be)`
8			`*/`
9
10			`#ifndef __ASM_SPARC64_FLOPPY_H`
11			`#define __ASM_SPARC64_FLOPPY_H`
12
13			`#include <linux/config.h>`
14			`#include <linux/init.h>`
15
16			`#include <asm/page.h>`
17			`#include <asm/pgtable.h>`
18			`#include <asm/system.h>`
19			`#include <asm/idprom.h>`
20			`#include <asm/oplib.h>`
21			`#include <asm/auxio.h>`
22			`#include <asm/sbus.h>`
23			`#include <asm/irq.h>`
24
25
26			`/*`
27			`* Define this to enable exchanging drive 0 and 1 if only drive 1 is`
28			`* probed on PCI machines.`
29			`*/`
30			`#undef PCI_FDC_SWAP_DRIVES`
31
32
33			`/* References:`
34			`* 1) Netbsd Sun floppy driver.`
35			`* 2) NCR 82077 controller manual`
36			`* 3) Intel 82077 controller manual`
37			`*/`
38			`struct sun_flpy_controller {`
39			`volatile unsigned char status1_82077; /* Auxiliary Status reg. 1 */`
40			`volatile unsigned char status2_82077; /* Auxiliary Status reg. 2 */`