Adding upstream version 4.19.249.upstream/4.19.249

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

1 files changed, 50 insertions, 0 deletions

diff --git a/arch/alpha/kernel/es1888.c b/arch/alpha/kernel/es1888.c
new file mode 100644
index 000000000..297476bb0
--- /dev/null
+++ b/arch/alpha/kernel/es1888.c
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *	linux/arch/alpha/kernel/es1888.c
+ *
+ * Init the built-in ES1888 sound chip (SB16 compatible)
+ */
+
+#include <linux/init.h>
+#include <asm/io.h>
+#include "proto.h"
+
+void __init
+es1888_init(void)
+{
+	/* Sequence of IO reads to init the audio controller */
+	inb(0x0229);
+	inb(0x0229);
+	inb(0x0229);
+	inb(0x022b);
+	inb(0x0229);
+	inb(0x022b);
+	inb(0x0229);
+	inb(0x0229);
+	inb(0x022b);
+	inb(0x0229);
+	inb(0x0220); /* This sets the base address to 0x220 */
+
+	/* Sequence to set DMA channels */
+	outb(0x01, 0x0226);		/* reset */
+	inb(0x0226);			/* pause */
+	outb(0x00, 0x0226);		/* release reset */
+	while (!(inb(0x022e) & 0x80))	/* wait for bit 7 to assert*/
+		continue;
+	inb(0x022a);			/* pause */
+	outb(0xc6, 0x022c);		/* enable extended mode */
+	inb(0x022a);			/* pause, also forces the write */
+	while (inb(0x022c) & 0x80)	/* wait for bit 7 to deassert */
+		continue;
+	outb(0xb1, 0x022c);		/* setup for write to Interrupt CR */
+	while (inb(0x022c) & 0x80)	/* wait for bit 7 to deassert */
+		continue;
+	outb(0x14, 0x022c);		/* set IRQ 5 */
+	while (inb(0x022c) & 0x80)	/* wait for bit 7 to deassert */
+		continue;
+	outb(0xb2, 0x022c);		/* setup for write to DMA CR */
+	while (inb(0x022c) & 0x80)	/* wait for bit 7 to deassert */
+		continue;
+	outb(0x18, 0x022c);		/* set DMA channel 1 */
+	inb(0x022c);			/* force the write */
+}