Initial import

1 files changed, 262 insertions, 0 deletions

diff --git a/arch/m68k/include/asm/sun3xflop.h b/arch/m68k/include/asm/sun3xflop.h
new file mode 100644
index 000000000..a02ea3a7b
--- /dev/null
+++ b/arch/m68k/include/asm/sun3xflop.h
@@ -0,0 +1,262 @@
+/* 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/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,
+				    0, "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) */