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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/arm/include/asm/floppy.h
Initial import
Diffstat (limited to 'arch/arm/include/asm/floppy.h')
-rw-r--r--arch/arm/include/asm/floppy.h148
1 files changed, 148 insertions, 0 deletions
diff --git a/arch/arm/include/asm/floppy.h b/arch/arm/include/asm/floppy.h
new file mode 100644
index 000000000..f4882553f
--- /dev/null
+++ b/arch/arm/include/asm/floppy.h
@@ -0,0 +1,148 @@
+/*
+ * arch/arm/include/asm/floppy.h
+ *
+ * Copyright (C) 1996-2000 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Note that we don't touch FLOPPY_DMA nor FLOPPY_IRQ here
+ */
+#ifndef __ASM_ARM_FLOPPY_H
+#define __ASM_ARM_FLOPPY_H
+#if 0
+#include <mach/floppy.h>
+#endif
+
+#define fd_outb(val,port) \
+ do { \
+ if ((port) == FD_DOR) \
+ fd_setdor((val)); \
+ else \
+ outb((val),(port)); \
+ } while(0)
+
+#define fd_inb(port) inb((port))
+#define fd_request_irq() request_irq(IRQ_FLOPPYDISK,floppy_interrupt,\
+ 0,"floppy",NULL)
+#define fd_free_irq() free_irq(IRQ_FLOPPYDISK,NULL)
+#define fd_disable_irq() disable_irq(IRQ_FLOPPYDISK)
+#define fd_enable_irq() enable_irq(IRQ_FLOPPYDISK)
+
+static inline int fd_dma_setup(void *data, unsigned int length,
+ unsigned int mode, unsigned long addr)
+{
+ set_dma_mode(DMA_FLOPPY, mode);
+ __set_dma_addr(DMA_FLOPPY, data);
+ set_dma_count(DMA_FLOPPY, length);
+ virtual_dma_port = addr;
+ enable_dma(DMA_FLOPPY);
+ return 0;
+}
+#define fd_dma_setup fd_dma_setup
+
+#define fd_request_dma() request_dma(DMA_FLOPPY,"floppy")
+#define fd_free_dma() free_dma(DMA_FLOPPY)
+#define fd_disable_dma() disable_dma(DMA_FLOPPY)
+
+/* need to clean up dma.h */
+#define DMA_FLOPPYDISK DMA_FLOPPY
+
+/* Floppy_selects is the list of DOR's to select drive fd
+ *
+ * On initialisation, the floppy list is scanned, and the drives allocated
+ * in the order that they are found. This is done by seeking the drive
+ * to a non-zero track, and then restoring it to track 0. If an error occurs,
+ * then there is no floppy drive present. [to be put back in again]
+ */
+static unsigned char floppy_selects[2][4] =
+{
+ { 0x10, 0x21, 0x23, 0x33 },
+ { 0x10, 0x21, 0x23, 0x33 }
+};
+
+#define fd_setdor(dor) \
+do { \
+ int new_dor = (dor); \
+ if (new_dor & 0xf0) \
+ new_dor = (new_dor & 0x0c) | floppy_selects[fdc][new_dor & 3]; \
+ else \
+ new_dor &= 0x0c; \
+ outb(new_dor, FD_DOR); \
+} while (0)
+
+/*
+ * Someday, we'll automatically detect which drives are present...
+ */
+static inline void fd_scandrives (void)
+{
+#if 0
+ int floppy, drive_count;
+
+ fd_disable_irq();
+ raw_cmd = &default_raw_cmd;
+ raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_SEEK;
+ raw_cmd->track = 0;
+ raw_cmd->rate = ?;
+ drive_count = 0;
+ for (floppy = 0; floppy < 4; floppy ++) {
+ current_drive = drive_count;
+ /*
+ * Turn on floppy motor
+ */
+ if (start_motor(redo_fd_request))
+ continue;
+ /*
+ * Set up FDC
+ */
+ fdc_specify();
+ /*
+ * Tell FDC to recalibrate
+ */
+ output_byte(FD_RECALIBRATE);
+ LAST_OUT(UNIT(floppy));
+ /* wait for command to complete */
+ if (!successful) {
+ int i;
+ for (i = drive_count; i < 3; i--)
+ floppy_selects[fdc][i] = floppy_selects[fdc][i + 1];
+ floppy_selects[fdc][3] = 0;
+ floppy -= 1;
+ } else
+ drive_count++;
+ }
+#else
+ floppy_selects[0][0] = 0x10;
+ floppy_selects[0][1] = 0x21;
+ floppy_selects[0][2] = 0x23;
+ floppy_selects[0][3] = 0x33;
+#endif
+}
+
+#define FDC1 (0x3f0)
+
+#define FLOPPY0_TYPE 4
+#define FLOPPY1_TYPE 4
+
+#define N_FDC 1
+#define N_DRIVE 4
+
+#define CROSS_64KB(a,s) (0)
+
+/*
+ * This allows people to reverse the order of
+ * fd0 and fd1, in case their hardware is
+ * strangely connected (as some RiscPCs
+ * and A5000s seem to be).
+ */
+static void driveswap(int *ints, int dummy, int dummy2)
+{
+ floppy_selects[0][0] ^= floppy_selects[0][1];
+ floppy_selects[0][1] ^= floppy_selects[0][0];
+ floppy_selects[0][0] ^= floppy_selects[0][1];
+}
+
+#define EXTRA_FLOPPY_PARAMS ,{ "driveswap", &driveswap, NULL, 0, 0 }
+
+#endif