Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 254 insertions, 0 deletions

diff --git a/arch/m68k/include/asm/floppy.h b/arch/m68k/include/asm/floppy.h
new file mode 100644
index 000000000..c3b9ad673
--- /dev/null
+++ b/arch/m68k/include/asm/floppy.h
@@ -0,0 +1,254 @@
+/*
+ * Implementation independent bits of the Floppy driver.
+ *
+ * much of this file is derived from what was originally the Q40 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, 2000, 2001
+ *
+ * Sun3x support added 2/4/2000 Sam Creasey (sammy@sammy.net)
+ *
+ */
+
+#include <asm/io.h>
+
+#include <linux/vmalloc.h>
+
+asmlinkage irqreturn_t floppy_hardint(int irq, void *dev_id);
+
+/* constants... */
+
+#undef MAX_DMA_ADDRESS
+#define MAX_DMA_ADDRESS   0x00  /* nothing like that */
+
+
+/*
+ * Again, the CMOS information doesn't work on m68k..
+ */
+#define FLOPPY0_TYPE (MACH_IS_Q40 ? 6 : 4)
+#define FLOPPY1_TYPE 0
+
+/* basically PC init + set use_virtual_dma */
+#define  FDC1 m68k_floppy_init()
+
+#define N_FDC 1
+#define N_DRIVE 8
+
+
+/* vdma globals adapted from asm-i386/floppy.h */
+
+static int virtual_dma_count=0;
+static int virtual_dma_residue=0;
+static char *virtual_dma_addr=NULL;
+static int virtual_dma_mode=0;
+static int doing_pdma=0;
+
+#include <asm/sun3xflop.h>
+
+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);
+}
+
+
+static __inline__ unsigned char fd_inb(int port)
+{
+	if(MACH_IS_Q40)
+		return inb_p(port);
+	else if(MACH_IS_SUN3X)
+		return sun3x_82072_fd_inb(port);
+	return 0;
+}
+
+static __inline__ void fd_outb(unsigned char value, int port)
+{
+	if(MACH_IS_Q40)
+		outb_p(value, port);
+	else if(MACH_IS_SUN3X)
+		sun3x_82072_fd_outb(value, port);
+}
+
+
+static int fd_request_irq(void)
+{
+	if(MACH_IS_Q40)
+		return request_irq(FLOPPY_IRQ, floppy_hardint,
+				   0, "floppy", floppy_hardint);
+	else if(MACH_IS_SUN3X)
+		return sun3xflop_request_irq();
+	return -ENXIO;
+}
+
+static void fd_free_irq(void)
+{
+	if(MACH_IS_Q40)
+		free_irq(FLOPPY_IRQ, floppy_hardint);
+}
+
+#define fd_request_dma()        vdma_request_dma(FLOPPY_DMA,"floppy")
+#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_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 m68k_floppy_init(void)
+{
+  use_virtual_dma =1;
+  can_use_virtual_dma = 1;
+
+
+  if (MACH_IS_Q40)
+	  return 0x3f0;
+  else if(MACH_IS_SUN3X)
+	  return sun3xflop_init();
+  else
+    return -1;
+}
+
+
+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 = (MACH_IS_Q40 ? io : 0);
+	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;
+}
+
+
+
+/* this is the only truly Q40 specific function */
+
+asmlinkage irqreturn_t floppy_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;
+	}
+
+#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 IRQ_HANDLED;
+	if(!(st & 0x20)) {
+		virtual_dma_residue += virtual_dma_count;
+		virtual_dma_count=0;
+#ifdef TRACE_FLPY_INT
+		pr_info("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);
+		return IRQ_HANDLED;
+	}
+#ifdef TRACE_FLPY_INT
+	if(!virtual_dma_count)
+		dma_wait++;
+#endif
+	return IRQ_HANDLED;
+}
+
+#define EXTRA_FLOPPY_PARAMS