superio/ite: Add support for IT8625E

Found on tiny firewall appliance from Chinese company named "Topton"
with Intel N100 SoC. This system is fanless so all we need is the
ability to use serial output (RS232 in RJ45 form-factor, called
"Cisco-style" at address 0x3f8), which is working.

Change-Id: I9c27f52785d294a6f7c315b8df47d4dd5b389414
Signed-off-by: Alicja Michalska <ahplka19@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84176
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Alexander Goncharov <chat@joursoir.net>
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
Reviewed-by: David Hendricks <david.hendricks@gmail.com>

src/superio/ite/it8625e/Kconfig

@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+config SUPERIO_ITE_IT8625E
+	bool
+	select SUPERIO_ITE_COMMON_PRE_RAM
+	select SUPERIO_ITE_ENV_CTRL
+	select SUPERIO_ITE_ENV_CTRL_PWM_FREQ2
+	select SUPERIO_ITE_ENV_CTRL_FAN16_CONFIG
+	select SUPERIO_ITE_ENV_CTRL_8BIT_PWM
+	select SUPERIO_ITE_ENV_CTRL_EXT_ANY_TMPIN

src/superio/ite/it8625e/Makefile.mk

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+ramstage-$(CONFIG_SUPERIO_ITE_IT8625E) += superio.c

src/superio/ite/it8625e/chip.h

@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef SUPERIO_ITE_IT8625E_CHIP_H
+#define SUPERIO_ITE_IT8625E_CHIP_H
+
+#include <superio/ite/common/env_ctrl_chip.h>
+
+struct superio_ite_it8625e_config {
+	struct ite_ec_config ec;
+};
+
+#endif /* SUPERIO_ITE_IT8625E_CHIP_H */

src/superio/ite/it8625e/it8625e.h

@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef SUPERIO_ITE_IT8625E_H
+#define SUPERIO_ITE_IT8625E_H
+
+#define IT8625E_SP1  0x01 /* COM1 */
+#define IT8625E_SP2  0x02 /* COM2 */
+#define IT8625E_PP   0x03 /* Parallel port */
+#define IT8625E_EC   0x04 /* Environment controller */
+#define IT8625E_KBCK 0x05 /* PS/2 keyboard */
+#define IT8625E_KBCM 0x06 /* PS/2 mouse */
+#define IT8625E_GPIO 0x07 /* GPIO */
+#define IT8625E_CIR  0x08 /* Consumer infrared */
+
+#endif /* SUPERIO_ITE_IT8625E_H */

src/superio/ite/it8625e/superio.c

@@ -0,0 +1,73 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <device/device.h>
+#include <device/pnp.h>
+#include <pc80/keyboard.h>
+#include <superio/conf_mode.h>
+#include <superio/ite/common/env_ctrl.h>
+
+#include "chip.h"
+#include "it8625e.h"
+
+static void it8625e_init(struct device *dev)
+{
+	const struct superio_ite_it8625e_config *conf = dev->chip_info;
+	const struct resource *res;
+
+	if (!dev->enabled)
+		return;
+
+	switch (dev->path.pnp.device) {
+	case IT8625E_EC:
+		res = probe_resource(dev, PNP_IDX_IO0);
+		if (!conf || !res)
+			break;
+		ite_ec_init(res->base, &conf->ec);
+		break;
+	case IT8625E_KBCK:
+		pc_keyboard_init(NO_AUX_DEVICE);
+		break;
+	case IT8625E_KBCM:
+		break;
+	}
+}
+
+static struct device_operations ops = {
+	.read_resources   = pnp_read_resources,
+	.set_resources    = pnp_set_resources,
+	.enable_resources = pnp_enable_resources,
+	.enable           = pnp_alt_enable,
+	.init             = it8625e_init,
+	.ops_pnp_mode     = &pnp_conf_mode_870155_aa,
+};
+
+static struct pnp_info pnp_dev_info[] = {
+	/* Serial Port 1 - 0x3f8 */
+	{ NULL, IT8625E_SP1, PNP_IO0 | PNP_IRQ0, 0x0ff8, },
+	/* Serial Port 2 - 0x2f8 */
+	{ NULL, IT8625E_SP2, PNP_IO0 | PNP_IRQ0, 0x0ff8, },
+	/* Parallel Port */
+	{ NULL, IT8625E_PP, PNP_IO0 | PNP_IO1 | PNP_IRQ0 | PNP_DRQ0,
+		0x0ff8, 0x0ff8, },
+	/* Environment Controller */
+	{ NULL, IT8625E_EC, PNP_IO0 | PNP_IO1 | PNP_IRQ0, 0x0ff0, 0x0ff0, },
+	/* PS/2 Keyboard */
+	{ NULL, IT8625E_KBCK, PNP_IO0 | PNP_IO1 | PNP_IRQ0, 0x0fff, 0x0fff, },
+	/* PS/2 Mouse */
+	{ NULL, IT8625E_KBCM, PNP_IRQ0, },
+	/* GPIO */
+	{ NULL, IT8625E_GPIO, PNP_IO0 | PNP_IO1 | PNP_IO2 | PNP_IRQ0,
+		0x0fff, 0x0fe0, 0x0fff, },
+	/* Consumer IR */
+	{ NULL, IT8625E_CIR, PNP_IO0 | PNP_IRQ0 | PNP_MSC0, 0x0ff8, },
+};
+
+static void enable_dev(struct device *dev)
+{
+	pnp_enable_devices(dev, &ops, ARRAY_SIZE(pnp_dev_info), pnp_dev_info);
+}
+
+struct chip_operations superio_ite_it8625e_ops = {
+	.name = "ITE IT8625E Super I/O",
+	.enable_dev = enable_dev,
+};