1 files changed, 41 insertions, 0 deletions
diff --git a/src/superio/smsc/sch555x/emi.c b/src/superio/smsc/sch555x/emi.c
new file mode 100644
index 0000000000..7b3b204181
--- /dev/null
+++ b/src/superio/smsc/sch555x/emi.c
@@ -0,0 +1,41 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <arch/io.h>
+#include <device/pnp_ops.h>
+#include "sch555x.h"
+
+uint8_t sch555x_emi_read8(uint16_t addr)
+{
+	outw(addr | 0x8000, SCH555x_EMI_IOBASE + 2);
+	return inb(SCH555x_EMI_IOBASE + 4);
+}
+
+uint16_t sch555x_emi_read16(uint16_t addr)
+{
+	outw(addr | 0x8001, SCH555x_EMI_IOBASE + 2);
+	return inw(SCH555x_EMI_IOBASE + 4);
+}
+
+uint32_t sch555x_emi_read32(uint16_t addr)
+{
+	outw(addr | 0x8002, SCH555x_EMI_IOBASE + 2);
+	return inl(SCH555x_EMI_IOBASE + 4);
+}
+
+void sch555x_emi_write8(uint16_t addr, uint8_t val)
+{
+	outw(addr | 0x8000, SCH555x_EMI_IOBASE + 2);
+	outb(val, SCH555x_EMI_IOBASE + 4);
+}
+
+void sch555x_emi_write16(uint16_t addr, uint16_t val)
+{
+	outw(addr | 0x8001, SCH555x_EMI_IOBASE + 2);
+	outw(val, SCH555x_EMI_IOBASE + 4);
+}
+
+void sch555x_emi_write32(uint16_t addr, uint32_t val)
+{
+	outw(addr | 0x8002, SCH555x_EMI_IOBASE + 2);
+	outl(val, SCH555x_EMI_IOBASE + 4);
+}