Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 58 insertions, 0 deletions

diff --git a/arch/arm/mach-footbridge/dma.c b/arch/arm/mach-footbridge/dma.c
new file mode 100644
index 000000000..86618074a
--- /dev/null
+++ b/arch/arm/mach-footbridge/dma.c
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  linux/arch/arm/kernel/dma-ebsa285.c
+ *
+ *  Copyright (C) 1998 Phil Blundell
+ *
+ * DMA functions specific to EBSA-285/CATS architectures
+ *
+ *  Changelog:
+ *   09-Nov-1998 RMK	Split out ISA DMA functions to dma-isa.c
+ *   17-Mar-1999 RMK	Allow any EBSA285-like architecture to have
+ *			ISA DMA controllers.
+ */
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/spinlock.h>
+#include <linux/scatterlist.h>
+
+#include <asm/dma.h>
+
+#include <asm/mach/dma.h>
+#include <asm/hardware/dec21285.h>
+
+#if 0
+static int fb_dma_request(unsigned int chan, dma_t *dma)
+{
+	return -EINVAL;
+}
+
+static void fb_dma_enable(unsigned int chan, dma_t *dma)
+{
+}
+
+static void fb_dma_disable(unsigned int chan, dma_t *dma)
+{
+}
+
+static struct dma_ops fb_dma_ops = {
+	.type		= "fb",
+	.request	= fb_dma_request,
+	.enable		= fb_dma_enable,
+	.disable	= fb_dma_disable,
+};
+#endif
+
+static int __init fb_dma_init(void)
+{
+#if 0
+	dma[_DC21285_DMA(0)].d_ops = &fb_dma_ops;
+	dma[_DC21285_DMA(1)].d_ops = &fb_dma_ops;
+#endif
+#ifdef CONFIG_ISA_DMA
+	if (footbridge_cfn_mode())
+		isa_init_dma();
+#endif
+	return 0;
+}
+core_initcall(fb_dma_init);