patch-2.3.48 linux/include/asm-mips64/floppy.h

• Lines: 103
• Date: Thu Feb 24 22:53:35 2000
• Orig file: v2.3.47/linux/include/asm-mips64/floppy.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.47/linux/include/asm-mips64/floppy.h linux/include/asm-mips64/floppy.h
@@ -0,0 +1,102 @@
+/* $Id: floppy.h,v 1.2 1999/08/21 22:19:17 ralf Exp $
+ *
+ * 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, 1996, 1997, 1998, 1999 Ralf Baechle
+ */
+#ifndef _ASM_FLOPPY_H
+#define _ASM_FLOPPY_H
+
+#include <asm/bootinfo.h>
+
+struct fd_ops {
+	unsigned char (*fd_inb)(unsigned int port);
+	void (*fd_outb)(unsigned char value, unsigned int port);
+
+	/*
+	 * How to access the floppy DMA functions.
+	 */
+	void (*fd_enable_dma)(int channel);
+	void (*fd_disable_dma)(int channel);
+	int (*fd_request_dma)(int channel);
+	void (*fd_free_dma)(int channel);
+	void (*fd_clear_dma_ff)(int channel);
+	void (*fd_set_dma_mode)(int channel, char mode);
+	void (*fd_set_dma_addr)(int channel, unsigned int a);
+	void (*fd_set_dma_count)(int channel, unsigned int count);
+	int (*fd_get_dma_residue)(int channel);
+	void (*fd_enable_irq)(int irq);
+	void (*fd_disable_irq)(int irq);
+	unsigned long (*fd_getfdaddr1)(void);
+	unsigned long (*fd_dma_mem_alloc)(unsigned long size);
+	void (*fd_dma_mem_free)(unsigned long addr, unsigned long size);
+	unsigned long (*fd_drive_type)(unsigned long);
+};
+
+extern struct fd_ops *fd_ops;
+
+#define fd_inb(port)			fd_ops->fd_inb(port)
+#define fd_outb(value,port)		fd_ops->fd_outb(value,port)
+
+#define fd_enable_dma(channel)		fd_ops->fd_enable_dma(channel)
+#define fd_disable_dma(channel)		fd_ops->fd_disable_dma(channel)
+#define fd_request_dma(channel)		fd_ops->fd_request_dma(channel)
+#define fd_free_dma(channel)		fd_ops->fd_free_dma(channel)
+#define fd_clear_dma_ff(channel)	fd_ops->fd_clear_dma_ff(channel)
+#define fd_set_dma_mode(channel, mode)	fd_ops->fd_set_dma_mode(channel, mode)
+#define fd_set_dma_addr(channel, addr)	fd_ops->fd_set_dma_addr(channel, \
+					         virt_to_bus(addr))
+#define fd_set_dma_count(channel,count)	fd_ops->fd_set_dma_count(channel,count)
+#define fd_get_dma_residue(channel)	fd_ops->fd_get_dma_residue(channel)
+
+#define fd_enable_irq(irq)		fd_ops->fd_enable_irq(irq)
+#define fd_disable_irq(irq)		fd_ops->fd_disable_irq(irq)
+#define fd_request_irq(irq)		request_irq(irq, floppy_interrupt, \
+						    SA_INTERRUPT \
+					            | SA_SAMPLE_RANDOM, \
+				                    "floppy", NULL)
+#define fd_free_irq(irq)		free_irq(irq, NULL);
+#define fd_dma_mem_alloc(size) fd_ops->fd_dma_mem_alloc(size)
+#define fd_dma_mem_free(mem,size) fd_ops->fd_dma_mem_free(mem,size)
+#define fd_drive_type(n)		fd_ops->fd_drive_type(n)
+
+#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 whereever a particular machine has stored this ...
+ */
+#define FLOPPY0_TYPE 			fd_drive_type(0)
+#define FLOPPY1_TYPE			fd_drive_type(1)
+
+#define FDC1			fd_ops->fd_getfdaddr1();
+static int __attribute__((__unused__)) FDC2=-1;
+
+#define N_FDC 1			/* do you *really* want a second controller? */
+#define N_DRIVE 8
+
+#define FLOPPY_MOTOR_MASK 0xf0
+
+/*
+ * 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)
+
+#endif /* _ASM_FLOPPY_H */