patch-2.2.8 linux/include/asm-m68k/floppy.h

• Lines: 240
• Date: Tue May 11 09:57:14 1999
• Orig file: v2.2.7/linux/include/asm-m68k/floppy.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.2.7/linux/include/asm-m68k/floppy.h linux/include/asm-m68k/floppy.h
@@ -0,0 +1,239 @@
+/*
+ * Q40 Architecture specific parts of the Floppy driver
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1999
+ */
+
+#include <asm/io.h>
+
+#include <linux/vmalloc.h>
+
+
+asmlinkage void floppy_hardint(int irq, void *dev_id, struct pt_regs * regs);
+
+#define MAX_DMA_ADDRESS   0x00  /* nothing like that */
+
+extern spinlock_t  dma_spin_lock;
+
+static __inline__ unsigned long claim_dma_lock(void)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&dma_spin_lock, flags);
+	return flags;
+}
+
+static __inline__ void release_dma_lock(unsigned long flags)
+{
+	spin_unlock_irqrestore(&dma_spin_lock, flags);
+}
+
+
+
+#define fd_inb(port)			inb_p(port)
+#define fd_outb(port,value)		outb_p(port,value)
+
+
+#define fd_request_dma()        vdma_request_dma(FLOPPY_DMA,"floppy")
+/*#define fd_free_dma()           */
+
+
+#define fd_get_dma_residue()    vdma_get_dma_residue(FLOPPY_DMA)
+#define fd_dma_mem_alloc(size)	vdma_mem_alloc(size)
+#define fd_dma_setup(addr, size, mode, io) vdma_dma_setup(addr, size, mode, io)
+
+
+#define fd_enable_irq()           /* nothing... */
+#define fd_disable_irq()          /* nothing... */
+#define fd_free_irq()		free_irq(FLOPPY_IRQ, NULL)
+
+#define fd_free_dma()             /* nothing */
+
+/* No 64k boundary crossing problems on Q40 - no DMA at all */
+#define CROSS_64KB(a,s) (0)
+
+#define DMA_MODE_READ  0x44    /* i386 look-alike */
+#define DMA_MODE_WRITE 0x48
+
+
+static int q40_floppy_init(void)
+{
+  use_virtual_dma =1;
+  /* FLOPPY_IRQ=6; */
+
+  if (MACH_IS_Q40)  
+    return 0x3f0;
+  else
+    return -1;
+}
+
+
+
+
+/*
+ * Again, the CMOS information doesn't work on the Q40..
+ */
+#define FLOPPY0_TYPE 6
+#define FLOPPY1_TYPE 0
+
+
+
+
+#define FLOPPY_MOTOR_MASK 0xf0
+
+
+
+
+/* basically PC init + set use_virtual_dma */
+#define  FDC1 q40_floppy_init()
+static int FDC2 = -1;
+
+
+#define N_FDC 1
+#define N_DRIVE 8
+
+
+
+/* vdma stuff adapted from asm-i386/floppy.h */
+
+static int virtual_dma_count=0;
+static int virtual_dma_residue=0;
+static char *virtual_dma_addr=0;
+static int virtual_dma_mode=0;
+static int doing_pdma=0;
+
+
+
+static int fd_request_irq(void)
+{
+  return request_irq(FLOPPY_IRQ, floppy_hardint,SA_INTERRUPT,
+						   "floppy", NULL);
+}
+
+/*#define SLOW_DOWN do{outb(0,0x80);}while(0)*/
+#define SLOW_DOWN do{int count=1;do{if(!jiffies)break;}while(count-->0);}while(0)
+
+asmlinkage void floppy_hardint(int irq, void *dev_id, struct pt_regs * regs)
+{
+	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, regs);
+		return;
+	}
+
+#ifdef TRACE_FLPY_INT
+	if(!calls)
+		bytes = virtual_dma_count;
+#endif
+
+	{
+		register int lcount;
+		register char *lptr;
+
+		/* serve 1st byte fast: */
+
+		st=1;
+		for(lcount=virtual_dma_count, lptr=virtual_dma_addr; 
+		    lcount; lcount--, lptr++) {
+			st=inb(virtual_dma_port+4) & 0xa0 ;
+			if(st != 0xa0) 
+				break;
+			if(virtual_dma_mode)
+				outb_p(*lptr, virtual_dma_port+5);
+			else
+				*lptr = inb_p(virtual_dma_port+5);
+		}
+
+		virtual_dma_count = lcount;
+		virtual_dma_addr = lptr;
+		st = inb(virtual_dma_port+4);
+	}
+
+#ifdef TRACE_FLPY_INT
+	calls++;
+#endif
+	if(st == 0x20)
+		return;
+	if(!(st & 0x20)) {
+		virtual_dma_residue += virtual_dma_count;
+		virtual_dma_count=0;
+#ifdef TRACE_FLPY_INT
+		printk("count=%x, residue=%x calls=%d bytes=%d dma_wait=%d\n", 
+		       virtual_dma_count, virtual_dma_residue, calls, bytes,
+		       dma_wait);
+		calls = 0;
+		dma_wait=0;
+#endif
+		doing_pdma = 0;
+		floppy_interrupt(irq, dev_id, regs);
+		return;
+	}
+#ifdef TRACE_FLPY_INT
+	if(!virtual_dma_count)
+		dma_wait++;
+#endif
+}
+
+
+
+static int vdma_request_dma(unsigned int dmanr, const char * device_id)
+{
+	return 0;
+}
+
+
+static int vdma_get_dma_residue(unsigned int dummy)
+{
+	return virtual_dma_count + virtual_dma_residue;
+}
+
+
+static unsigned long vdma_mem_alloc(unsigned long size)
+{
+	return (unsigned long) vmalloc(size);
+
+}
+
+static void _fd_dma_mem_free(unsigned long addr, unsigned long size)
+{
+        vfree((void *)addr);
+}
+#define fd_dma_mem_free(addr,size) _fd_dma_mem_free(addr, size)
+
+
+/* choose_dma_mode ???*/
+
+static int vdma_dma_setup(char *addr, unsigned long size, int mode, int io)
+{
+	doing_pdma = 1;
+	virtual_dma_port = io;
+	virtual_dma_mode = (mode  == DMA_MODE_WRITE);
+	virtual_dma_addr = addr;
+	virtual_dma_count = size;
+	virtual_dma_residue = 0;
+	return 0;
+}
+
+
+
+static void fd_disable_dma(void)
+{
+	doing_pdma = 0;
+	virtual_dma_residue += virtual_dma_count;
+	virtual_dma_count=0;
+}
+
+
+