1 files changed, 106 insertions, 0 deletions
diff --git a/arch/sh/drivers/dma/dma-isa.c b/arch/sh/drivers/dma/dma-isa.c
new file mode 100644
index 00000000000..1c9bc45b8bc
--- /dev/null
+++ b/arch/sh/drivers/dma/dma-isa.c
@@ -0,0 +1,106 @@
+/*
+ * arch/sh/drivers/dma/dma-isa.c
+ *
+ * Generic ISA DMA wrapper for SH DMA API
+ *
+ * Copyright (C) 2003, 2004  Paul Mundt
+ *
+ * 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.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <asm/dma.h>
+
+/*
+ * This implements a small wrapper set to make code using the old ISA DMA API
+ * work with the SH DMA API. Since most of the work in the new API happens
+ * at ops->xfer() time, we simply use the various set_dma_xxx() routines to
+ * fill in per-channel info, and then hand hand this off to ops->xfer() at
+ * enable_dma() time.
+ *
+ * For channels that are doing on-demand data transfer via cascading, the
+ * channel itself will still need to be configured through the new API. As
+ * such, this code is meant for only the simplest of tasks (and shouldn't be
+ * used in any new drivers at all).
+ *
+ * It should also be noted that various functions here are labelled as
+ * being deprecated. This is due to the fact that the ops->xfer() method is
+ * the preferred way of doing things (as well as just grabbing the spinlock
+ * directly). As such, any users of this interface will be warned rather
+ * loudly.
+ */
+
+unsigned long __deprecated claim_dma_lock(void)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&dma_spin_lock, flags);
+
+	return flags;
+}
+EXPORT_SYMBOL(claim_dma_lock);
+
+void __deprecated release_dma_lock(unsigned long flags)
+{
+	spin_unlock_irqrestore(&dma_spin_lock, flags);
+}
+EXPORT_SYMBOL(release_dma_lock);
+
+void __deprecated disable_dma(unsigned int chan)
+{
+	/* Nothing */
+}
+EXPORT_SYMBOL(disable_dma);
+
+void __deprecated enable_dma(unsigned int chan)
+{
+	struct dma_info *info = get_dma_info(chan);
+	struct dma_channel *channel = &info->channels[chan];
+
+	info->ops->xfer(channel);
+}
+EXPORT_SYMBOL(enable_dma);
+
+void clear_dma_ff(unsigned int chan)
+{
+	/* Nothing */
+}
+EXPORT_SYMBOL(clear_dma_ff);
+
+void set_dma_mode(unsigned int chan, char mode)
+{
+	struct dma_info *info = get_dma_info(chan);
+	struct dma_channel *channel = &info->channels[chan];
+
+	channel->mode = mode;
+}
+EXPORT_SYMBOL(set_dma_mode);
+
+void set_dma_addr(unsigned int chan, unsigned int addr)
+{
+	struct dma_info *info = get_dma_info(chan);
+	struct dma_channel *channel = &info->channels[chan];
+
+	/*
+	 * Single address mode is the only thing supported through
+	 * this interface.
+	 */
+	if ((channel->mode & DMA_MODE_MASK) == DMA_MODE_READ) {
+		channel->sar = addr;
+	} else {
+		channel->dar = addr;
+	}
+}
+EXPORT_SYMBOL(set_dma_addr);
+
+void set_dma_count(unsigned int chan, unsigned int count)
+{
+	struct dma_info *info = get_dma_info(chan);
+	struct dma_channel *channel = &info->channels[chan];
+
+	channel->count = count;
+}
+EXPORT_SYMBOL(set_dma_count);
+