superio/winbond/wpcd376i: Resurrect the driver

This SuperIO chip is used on the Intel DQ45EK mainboard. Restore the
driver that was deleted in commit d3a1a4171e ("src/superio: Remove
unused superio chips"). Changes from the previous version include:
 - Replacing the early serial implementation with Winbond common code,
 - Replacing the license boilerplate with SPDX headers, and
 - Removing unnecessary header file references.

Change-Id: I0ff1a63c47d5dff2599c83a1cebe1ac5ff2136b1
Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44695
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/superio/winbond/Makefile.inc

@@ -11,3 +11,4 @@ subdirs-y += w83627thg
 subdirs-y += w83627uhg
 subdirs-y += w83667hg-a
 subdirs-y += w83977tf
+subdirs-y += wpcd376i

src/superio/winbond/wpcd376i/Kconfig

@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+config SUPERIO_WINBOND_WPCD376I
+	bool
+	select SUPERIO_WINBOND_COMMON_PRE_RAM

src/superio/winbond/wpcd376i/Makefile.inc

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+ramstage-$(CONFIG_SUPERIO_WINBOND_WPCD376I) += superio.c

src/superio/winbond/wpcd376i/superio.c

@@ -0,0 +1,66 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <device/device.h>
+#include <device/pnp.h>
+#include <pc80/keyboard.h>
+#include "wpcd376i.h"
+
+static void init(struct device *dev)
+{
+	if (!dev->enabled)
+		return;
+
+	switch (dev->path.pnp.device) {
+	case WPCD376I_KBCK:
+		pc_keyboard_init(NO_AUX_DEVICE);
+		break;
+	}
+}
+
+static struct device_operations ops = {
+	.read_resources		= pnp_read_resources,
+	.set_resources		= pnp_set_resources,
+	.enable_resources	= pnp_enable_resources,
+	.enable			= pnp_enable,
+	.init			= init,
+};
+
+static struct pnp_info pnp_dev_info[] = {
+	{ NULL, WPCD376I_FDC,
+		PNP_IO0 | PNP_IRQ0 | PNP_DRQ0 | PNP_MSC0 | PNP_MSC1 | PNP_MSC8,
+		0x07f8, },
+	{ NULL, WPCD376I_LPT,
+		PNP_IO0 | PNP_IRQ0 | PNP_DRQ0 | PNP_MSC0 | PNP_MSC8,
+		0x03f8, },
+	{ NULL, WPCD376I_SP1,
+		PNP_IO0 | PNP_IRQ0 | PNP_MSC0,
+		0x07f8, },
+	{ NULL, WPCD376I_SWC,
+		PNP_IO0 | PNP_IO1 | PNP_IRQ0,
+		0xfff0, 0xfff0, },
+	{ NULL, WPCD376I_KBCM,
+		PNP_IRQ0, },
+	{ NULL, WPCD376I_KBCK,
+		PNP_IO0 | PNP_IO1 | PNP_IRQ0 | PNP_MSC0,
+		0x07f8, 0x07f8, },
+	{ NULL, WPCD376I_GPIO,
+		PNP_IO0 | PNP_IRQ0 | PNP_MSC0 | PNP_MSC1 | PNP_MSC2 | PNP_MSC3 |
+		PNP_MSC8,
+		0xffe0, },
+	{ NULL, WPCD376I_ECIR,
+		PNP_IO0 | PNP_IO1 | PNP_IRQ0,
+		0xfff0, 0xfff0, },
+	{ NULL, WPCD376I_IR,
+		PNP_IO0 | PNP_IRQ0 | PNP_DRQ0 | PNP_DRQ1 | PNP_MSC0,
+		0xfff8, },
+};
+
+static void enable_dev(struct device *dev)
+{
+	pnp_enable_devices(dev, &ops, ARRAY_SIZE(pnp_dev_info), pnp_dev_info);
+}
+
+struct chip_operations superio_winbond_wpcd376i_ops = {
+	CHIP_NAME("Winbond WPCD376I Super I/O")
+	.enable_dev = enable_dev,
+};

src/superio/winbond/wpcd376i/wpcd376i.h

@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef SUPERIO_WINBOND_WPCD376I_WPCD376I_H
+#define SUPERIO_WINBOND_WPCD376I_WPCD376I_H
+
+/* Logical Device Numbers (LDN). */
+#define WPCD376I_FDC	0x00  /* Floppy */
+#define WPCD376I_LPT	0x01  /* Parallel port */
+/*			0x02     Undefined */
+#define WPCD376I_SP1	0x03  /* UART1 */
+#define WPCD376I_SWC	0x04  /* System wake-up control */
+#define WPCD376I_KBCM	0x05  /* PS/2 mouse */
+#define WPCD376I_KBCK	0x06  /* PS/2 keyboard */
+#define WPCD376I_GPIO	0x07  /* General Purpose I/O */
+#define WPCD376I_ECIR	0x15  /* Enhanced Consumer Infrared Functions (ECIR) */
+#define WPCD376I_IR	0x16  /* UART3 & Infrared port */
+
+#endif