linux-kernel - [PATCH 03/23] floppy: use symbolic register names in the m68k port

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Message-Id: <20200331094054.24441-4-w@1wt.eu>
Date:   Tue, 31 Mar 2020 11:40:34 +0200
From:   Willy Tarreau <w@....eu>
To:     Denis Efremov <efremov@...ux.com>
Cc:     Jens Axboe <axboe@...nel.dk>, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, Willy Tarreau <w@....eu>,
        Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: [PATCH 03/23] floppy: use symbolic register names in the m68k port

Now we can use FD_STATUS and FD_DATA instead of 4 or 5, let's do
this, and also use STATUS_DMA and STATUS_READY for the status bits.

Cc: Geert Uytterhoeven <geert@...ux-m68k.org>
Signed-off-by: Willy Tarreau <w@....eu>
---
 arch/m68k/include/asm/floppy.h | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/arch/m68k/include/asm/floppy.h b/arch/m68k/include/asm/floppy.h
index 2a6ce29b92aa..a4d0fea47c6b 100644
--- a/arch/m68k/include/asm/floppy.h
+++ b/arch/m68k/include/asm/floppy.h
@@ -211,26 +211,27 @@ asmlinkage irqreturn_t floppy_hardint(int irq, void *dev_id)
 		st=1;
 		for(lcount=virtual_dma_count, lptr=virtual_dma_addr;
 		    lcount; lcount--, lptr++) {
-			st=inb(virtual_dma_port+4) & 0xa0 ;
-			if(st != 0xa0)
+			st = inb(virtual_dma_port + FD_STATUS);
+			st &= STATUS_DMA | STATUS_READY;
+			if (st != (STATUS_DMA | STATUS_READY))
 				break;
 			if(virtual_dma_mode)
-				outb_p(*lptr, virtual_dma_port+5);
+				outb_p(*lptr, virtual_dma_port + FD_DATA);
 			else
-				*lptr = inb_p(virtual_dma_port+5);
+				*lptr = inb_p(virtual_dma_port + FD_DATA);
 		}
 
 		virtual_dma_count = lcount;
 		virtual_dma_addr = lptr;
-		st = inb(virtual_dma_port+4);
+		st = inb(virtual_dma_port + FD_STATUS);
 	}
 
 #ifdef TRACE_FLPY_INT
 	calls++;
 #endif
-	if(st == 0x20)
+	if (st == STATUS_DMA)
 		return IRQ_HANDLED;
-	if(!(st & 0x20)) {
+	if (!(st & STATUS_DMA)) {
 		virtual_dma_residue += virtual_dma_count;
 		virtual_dma_count=0;
 #ifdef TRACE_FLPY_INT
-- 
2.20.1