patch-1.3.48 linux/arch/mips/kernel/tyne-c.c

• Lines: 123
• Date: Wed Dec 13 12:39:44 1995
• Orig file: v1.3.47/linux/arch/mips/kernel/tyne-c.c
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.47/linux/arch/mips/kernel/tyne-c.c linux/arch/mips/kernel/tyne-c.c
@@ -0,0 +1,122 @@
+/*
+ * Deskstation Tyne specific C parts
+ *
+ * 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) 1994, 1995 by Ralf Baechle
+ */
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <asm/bootinfo.h>
+#include <asm/cachectl.h>
+#include <asm/dma.h>
+#include <asm/io.h>
+
+/*
+ * How to access the FDC's registers.
+ */
+unsigned char deskstation_tyne_fd_inb(unsigned int port)
+{
+	return inb_p(port);
+}
+
+void deskstation_tyne_fd_outb(unsigned char value, unsigned int port)
+{
+	outb_p(value, port);
+}
+
+/*
+ * How to access the floppy DMA functions.
+ */
+void deskstation_tyne_fd_enable_dma(void)
+{
+	enable_dma(FLOPPY_DMA);
+}
+
+void deskstation_tyne_fd_disable_dma(void)
+{
+	disable_dma(FLOPPY_DMA);
+}
+
+int deskstation_tyne_fd_request_dma(void)
+{
+	return request_dma(FLOPPY_DMA, "floppy");
+}
+
+void deskstation_tyne_fd_free_dma(void)
+{
+	free_dma(FLOPPY_DMA);
+}
+
+void deskstation_tyne_fd_clear_dma_ff(void)
+{
+	clear_dma_ff(FLOPPY_DMA);
+}
+
+int deskstation_tyne_fd_set_dma_mode(char mode)
+{
+	return set_dma_mode(FLOPPY_DMA, mode);
+}
+
+void deskstation_tyne_fd_set_dma_addr(unsigned int a)
+{
+	set_dma_addr(FLOPPY_DMA, addr);
+}
+
+void deskstation_tyne_fd_set_dma_count(unsigned int count)
+{
+	set_dma_count(FLOPPY_DMA, count);
+}
+
+int deskstation_tyne_fd_get_dma_residue(void)
+{
+	return get_dma_residue(FLOPPY_DMA);
+}
+
+void deskstation_tyne_fd_enable_irq(void)
+{
+	enable_irq(FLOPPY_IRQ);
+}
+
+void deskstation_tyne_fd_disable_irq(void)
+{
+	disable_irq(FLOPPY_IRQ);
+}
+
+void deskstation_tyne_fd_cacheflush(unsigned char *addr, unsigned int)
+{
+	sys_cacheflush((void *)addr, size, DCACHE);
+}
+
+
+/*
+ * Tiny Tyne DMA buffer allocator
+ *
+ * Untested for a long time and changed again and again ...
+ * Sorry, but no hardware to test ...
+ */
+static unsigned long allocated;
+
+/*
+ * Not very sophisticated, but should suffice for now...
+ */
+unsigned long deskstation_tyne_dma_alloc(size_t size)
+{
+	unsigned long ret = allocated;
+	allocated += size;
+	if (allocated > boot_info.dma_cache_size)
+		ret = -1;
+	return ret;
+}
+
+void deskstation_tyne_dma_init(void)
+{
+	if (boot_info.machtype != MACH_DESKSTATION_TYNE)
+		return;
+	allocated = 0;
+	printk ("Deskstation Tyne DMA (%luk) buffer initialized.\n",
+	        boot_info.dma_cache_size >> 10);
+}