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/
usr/
src/
linux-headers-3.0.0-14/
arch/
m68k/
include/
asm/
- drwxr-xr-x
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Viewing file:  sun3xflop.h (5.63 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
/* sun3xflop.h: Sun3/80 specific parts of the floppy driver.
*
* Derived partially from asm-sparc/floppy.h, which is:
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
*
* Sun3x version 2/4/2000 Sam Creasey (sammy@sammy.net)
*/
#ifndef __ASM_SUN3X_FLOPPY_H
#define __ASM_SUN3X_FLOPPY_H
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/system.h>
#include <asm/irq.h>
#include <asm/sun3x.h>
/* default interrupt vector */
#define SUN3X_FDC_IRQ 0x40
/* some constants */
#define FCR_TC 0x1
#define FCR_EJECT 0x2
#define FCR_MTRON 0x4
#define FCR_DSEL1 0x8
#define FCR_DSEL0 0x10
/* 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)
struct sun3xflop_private {
volatile unsigned char *status_r;
volatile unsigned char *data_r;
volatile unsigned char *fcr_r;
volatile unsigned char *fvr_r;
unsigned char fcr;
} sun3x_fdc;
/* Super paranoid... */
#undef HAVE_DISABLE_HLT
/* Routines unique to each controller type on a Sun. */
static unsigned char sun3x_82072_fd_inb(int port)
{
static int once = 0;
// 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 (*sun3x_fdc.status_r) & ~STATUS_DMA;
case 5: /* FD_DATA */
return (*sun3x_fdc.data_r);
case 7: /* FD_DIR */
/* ugly hack, I can't find a way to actually detect the disk */
if(!once) {
once = 1;
return 0x80;
}
return 0;
};
panic("sun_82072_fd_inb: How did I get here?");
}
static void sun3x_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 */
/* Oh geese, 82072 on the Sun has no DOR register,
* so we make do with taunting the FCR.
*
* ASSUMPTIONS: There will only ever be one floppy
* drive attached to a Sun controller
* and it will be at drive zero.
*/
{
unsigned char fcr = sun3x_fdc.fcr;
if(value & 0x10) {
fcr |= (FCR_DSEL0 | FCR_MTRON);
} else
fcr &= ~(FCR_DSEL0 | FCR_MTRON);
if(fcr != sun3x_fdc.fcr) {
*(sun3x_fdc.fcr_r) = fcr;
sun3x_fdc.fcr = fcr;
}
}
break;
case 5: /* FD_DATA */
*(sun3x_fdc.data_r) = value;
break;
case 7: /* FD_DCR */
*(sun3x_fdc.status_r) = value;
break;
case 4: /* FD_STATUS */
*(sun3x_fdc.status_r) = value;
break;
};
return;
}
asmlinkage irqreturn_t sun3xflop_hardint(int irq, void *dev_id)
{
register unsigned char st;
#undef TRACE_FLPY_INT
#define NO_FLOPPY_ASSEMBLER
#ifdef TRACE_FLPY_INT
static int calls=0;
static int bytes=0;
static int dma_wait=0;
#endif
if(!doing_pdma) {
floppy_interrupt(irq, dev_id);
return IRQ_HANDLED;
}
// printk("doing pdma\n");// st %x\n", sun_fdc->status_82072);
#ifdef TRACE_FLPY_INT
if(!calls)
bytes = virtual_dma_count;
#endif
{
register int lcount;
register char *lptr;
for(lcount=virtual_dma_count, lptr=virtual_dma_addr;
lcount; lcount--, lptr++) {
/* st=fd_inb(virtual_dma_port+4) & 0x80 ; */
st = *(sun3x_fdc.status_r);
/* if(st != 0xa0) */
/* break; */
if((st & 0x80) == 0) {
virtual_dma_count = lcount;
virtual_dma_addr = lptr;
return IRQ_HANDLED;
}
if((st & 0x20) == 0)
break;
if(virtual_dma_mode)
/* fd_outb(*lptr, virtual_dma_port+5); */
*(sun3x_fdc.data_r) = *lptr;
else
/* *lptr = fd_inb(virtual_dma_port+5); */
*lptr = *(sun3x_fdc.data_r);
}
virtual_dma_count = lcount;
virtual_dma_addr = lptr;
/* st = fd_inb(virtual_dma_port+4); */
st = *(sun3x_fdc.status_r);
}
#ifdef TRACE_FLPY_INT
calls++;
#endif
// printk("st=%02x\n", st);
if(st == 0x20)
return IRQ_HANDLED;
if(!(st & 0x20)) {
virtual_dma_residue += virtual_dma_count;
virtual_dma_count=0;
doing_pdma = 0;
#ifdef TRACE_FLPY_INT
printk("count=%x, residue=%x calls=%d bytes=%x dma_wait=%d\n",
virtual_dma_count, virtual_dma_residue, calls, bytes,
dma_wait);
calls = 0;
dma_wait=0;
#endif
floppy_interrupt(irq, dev_id);
return IRQ_HANDLED;
}
#ifdef TRACE_FLPY_INT
if(!virtual_dma_count)
dma_wait++;
#endif
return IRQ_HANDLED;
}
static int sun3xflop_request_irq(void)
{
static int once = 0;
int error;
if(!once) {
once = 1;
error = request_irq(FLOPPY_IRQ, sun3xflop_hardint,
IRQF_DISABLED, "floppy", NULL);
return ((error == 0) ? 0 : -1);
} else return 0;
}
static void __init floppy_set_flags(int *ints,int param, int param2);
static int sun3xflop_init(void)
{
if(FLOPPY_IRQ < 0x40)
FLOPPY_IRQ = SUN3X_FDC_IRQ;
sun3x_fdc.status_r = (volatile unsigned char *)SUN3X_FDC;
sun3x_fdc.data_r = (volatile unsigned char *)(SUN3X_FDC+1);
sun3x_fdc.fcr_r = (volatile unsigned char *)SUN3X_FDC_FCR;
sun3x_fdc.fvr_r = (volatile unsigned char *)SUN3X_FDC_FVR;
sun3x_fdc.fcr = 0;
/* Last minute sanity check... */
if(*sun3x_fdc.status_r == 0xff) {
return -1;
}
*sun3x_fdc.fvr_r = FLOPPY_IRQ;
*sun3x_fdc.fcr_r = FCR_TC;
udelay(10);
*sun3x_fdc.fcr_r = 0;
/* Success... */
floppy_set_flags(NULL, 1, FD_BROKEN_DCL); // I don't know how to detect this.
allowed_drive_mask = 0x01;
return (int) SUN3X_FDC;
}
/* I'm not precisely sure this eject routine works */
static int sun3x_eject(void)
{
if(MACH_IS_SUN3X) {
sun3x_fdc.fcr |= (FCR_DSEL0 | FCR_EJECT);
*(sun3x_fdc.fcr_r) = sun3x_fdc.fcr;
udelay(10);
sun3x_fdc.fcr &= ~(FCR_DSEL0 | FCR_EJECT);
*(sun3x_fdc.fcr_r) = sun3x_fdc.fcr;
}
return 0;
}
#define fd_eject(drive) sun3x_eject()
#endif /* !(__ASM_SUN3X_FLOPPY_H) */
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