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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/mips/include/asm/floppy.h
Initial import
Diffstat (limited to 'arch/mips/include/asm/floppy.h')
-rw-r--r--arch/mips/include/asm/floppy.h56
1 files changed, 56 insertions, 0 deletions
diff --git a/arch/mips/include/asm/floppy.h b/arch/mips/include/asm/floppy.h
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+++ b/arch/mips/include/asm/floppy.h
@@ -0,0 +1,56 @@
+/*
+ * 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) 1995 - 2000 Ralf Baechle
+ */
+#ifndef _ASM_FLOPPY_H
+#define _ASM_FLOPPY_H
+
+#include <linux/dma-mapping.h>
+
+static inline void fd_cacheflush(char * addr, long size)
+{
+ dma_cache_sync(NULL, addr, size, DMA_BIDIRECTIONAL);
+}
+
+#define MAX_BUFFER_SECTORS 24
+
+
+/*
+ * And on Mips's the CMOS info fails also ...
+ *
+ * FIXME: This information should come from the ARC configuration tree
+ * or wherever a particular machine has stored this ...
+ */
+#define FLOPPY0_TYPE fd_drive_type(0)
+#define FLOPPY1_TYPE fd_drive_type(1)
+
+#define FDC1 fd_getfdaddr1()
+
+#define N_FDC 1 /* do you *really* want a second controller? */
+#define N_DRIVE 8
+
+/*
+ * The DMA channel used by the floppy controller cannot access data at
+ * addresses >= 16MB
+ *
+ * Went back to the 1MB limit, as some people had problems with the floppy
+ * driver otherwise. It doesn't matter much for performance anyway, as most
+ * floppy accesses go through the track buffer.
+ *
+ * On MIPSes using vdma, this actually means that *all* transfers go thru
+ * the * track buffer since 0x1000000 is always smaller than KSEG0/1.
+ * Actually this needs to be a bit more complicated since the so much different
+ * hardware available with MIPS CPUs ...
+ */
+#define CROSS_64KB(a, s) ((unsigned long)(a)/K_64 != ((unsigned long)(a) + (s) - 1) / K_64)
+
+#define EXTRA_FLOPPY_PARAMS
+
+#include <floppy.h>
+
+#endif /* _ASM_FLOPPY_H */