From 62c25351c101a3d5c7104aa6fc34e71990478dde Mon Sep 17 00:00:00 2001
From: Mate Kukri <kukri.mate@gmail.com>
Date: Sun, 6 Jun 2021 14:00:57 +0100
Subject: superio/smsc: Add support for the SCH555x series

Used by the OptiPlex 3020/7020/9020:
- EMI and Runtime registers work
- UART1 works (including IRQs)
- PS/2 keyboard and mouse untested

Signed-off-by: Mate Kukri <kukri.mate@gmail.com>
Change-Id: I9323198f1139cd0c3dd37f977ae7693b721654f4
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64359
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin L Roth <gaumless@gmail.com>
---
 src/superio/smsc/sch555x/emi.c | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 src/superio/smsc/sch555x/emi.c

(limited to 'src/superio/smsc/sch555x/emi.c')

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);
+}
-- 
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