patch-2.1.44 linux/arch/mips/jazz/hw-access.c

• Lines: 149
• Date: Thu Jun 26 12:33:37 1997
• Orig file: v2.1.43/linux/arch/mips/jazz/hw-access.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.43/linux/arch/mips/jazz/hw-access.c linux/arch/mips/jazz/hw-access.c
@@ -0,0 +1,148 @@
+/*
+ * Low-level hardware access stuff for Jazz family machines.
+ *
+ * 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 by Ralf Baechle
+ */
+#include <linux/delay.h>
+#include <linux/linkage.h>
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <asm/addrspace.h>
+#include <asm/vector.h>
+#include <asm/jazz.h>
+#include <asm/jazzdma.h>
+#include <asm/pgtable.h>
+#include <asm/mc146818rtc.h>
+
+static unsigned char
+fd_inb(unsigned int port)
+{
+	unsigned char c;
+
+	c = *(volatile unsigned char *) port;
+	udelay(1);
+
+	return c;
+}
+
+static void
+fd_outb(unsigned char value, unsigned int port)
+{
+	*(volatile unsigned char *) port = value;
+}
+
+/*
+ * How to access the floppy DMA functions.
+ */
+static void
+fd_enable_dma(void)
+{
+	vdma_enable(JAZZ_FLOPPY_DMA);
+}
+
+static void
+fd_disable_dma(void)
+{
+	vdma_disable(JAZZ_FLOPPY_DMA);
+}
+
+static int
+fd_request_dma(void)
+{
+	return 0;
+}
+
+static void
+fd_free_dma(void)
+{
+}
+
+static void
+fd_clear_dma_ff(void)
+{
+}
+
+static void
+fd_set_dma_mode(char mode)
+{
+	vdma_set_mode(JAZZ_FLOPPY_DMA, mode);
+}
+
+static void
+fd_set_dma_addr(unsigned int a)
+{
+	vdma_set_addr(JAZZ_FLOPPY_DMA, vdma_phys2log(PHYSADDR(a)));
+}
+
+static void
+fd_set_dma_count(unsigned int count)
+{
+	vdma_set_count(JAZZ_FLOPPY_DMA, count);
+}
+
+static int
+fd_get_dma_residue(void)
+{
+	return vdma_get_residue(JAZZ_FLOPPY_DMA);
+}
+
+static void
+fd_enable_irq(void)
+{
+}
+
+static void
+fd_disable_irq(void)
+{
+}
+
+void
+jazz_fd_cacheflush(const void *addr, size_t size)
+{
+	flush_cache_all();
+}
+
+static unsigned char
+rtc_read_data(unsigned long addr)
+{
+	outb_p(addr, RTC_PORT(0));
+	return *(char *)JAZZ_RTC_BASE;
+}
+
+static void
+rtc_write_data(unsigned char data, unsigned long addr)
+{
+	outb_p(addr, RTC_PORT(0));
+	*(char *)JAZZ_RTC_BASE = data;
+}
+
+struct feature jazz_feature = {
+	/*
+	 * How to access the floppy controller's ports
+	 */
+	fd_inb,
+	fd_outb,
+	/*
+	 * How to access the floppy DMA functions.
+	 */
+	fd_enable_dma,
+	fd_disable_dma,
+	fd_request_dma,
+	fd_free_dma,
+	fd_clear_dma_ff,
+	fd_set_dma_mode,
+	fd_set_dma_addr,
+	fd_set_dma_count,
+	fd_get_dma_residue,
+	fd_enable_irq,
+	fd_disable_irq,
+	/*
+	 * How to access the RTC functions.
+	 */
+	rtc_read_data,
+	rtc_write_data
+};