superio/ite: Add IT8784E support

IT8784E is basically a IT8786E stripped from serial ports 3-6.

The patch creates a chip directory for IT8784E used by
protectli/vault_cml platforms.

TEST=Boot Ubuntu 22.04 on Protectli VP4670 (vault_cml) and dump the
configuration with superiotool and compare the configuration with
proprietary firmware.

Signed-off-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Change-Id: Ibe01358611f3ce3f155ddb01a7d177a3ff75765e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74174
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin L Roth <gaumless@gmail.com>

6 files changed, 278 insertions, 0 deletions

diff --git a/src/superio/ite/it8784e/Kconfig b/src/superio/ite/it8784e/Kconfig
new file mode 100644
index 0000000000..66dd6c9362
--- /dev/null
+++ b/src/superio/ite/it8784e/Kconfig
@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+config SUPERIO_ITE_IT8784E
+	bool
+	select SUPERIO_ITE_COMMON_PRE_RAM
+	select SUPERIO_ITE_ENV_CTRL
+	select SUPERIO_ITE_ENV_CTRL_PWM_FREQ2
+	select SUPERIO_ITE_ENV_CTRL_8BIT_PWM
+	select SUPERIO_ITE_ENV_CTRL_7BIT_SLOPE_REG
+	select SUPERIO_ITE_ENV_CTRL_EXT_ANY_TMPIN
diff --git a/src/superio/ite/it8784e/Makefile.inc b/src/superio/ite/it8784e/Makefile.inc
new file mode 100644
index 0000000000..2a3a6d9232
--- /dev/null
+++ b/src/superio/ite/it8784e/Makefile.inc
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+ramstage-$(CONFIG_SUPERIO_ITE_IT8784E) += superio.c
diff --git a/src/superio/ite/it8784e/acpi/superio.asl b/src/superio/ite/it8784e/acpi/superio.asl
new file mode 100644
index 0000000000..c145a2b5ba
--- /dev/null
+++ b/src/superio/ite/it8784e/acpi/superio.asl
@@ -0,0 +1,151 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/*
+ * Include this file into a mainboard's DSDT _SB device tree and it will
+ * expose the IT8784E SuperIO and some of its functionality.
+ *
+ * It allows the change of IO ports, IRQs and DMA settings on logical
+ * devices, disabling and reenabling logical devices.
+ *
+ *   LDN		State
+ * 0x1 UARTA		Implemented, untested
+ * 0x2 UARTB		Implemented, untested
+ * 0x3 PP		Not implemented
+ * 0x4 EC		Implemented, untested
+ * 0x5 KBC		Implemented, untested
+ * 0x6 MOUSE		Implemented, untested
+ * 0x7 GPIO		Not implemented
+ * 0xa CIR		Not implemented
+ *
+ * Controllable through preprocessor defines:
+ * SUPERIO_DEV		Device identifier for this SIO (e.g. SIO0)
+ * SUPERIO_PNP_BASE	I/O address of the first PnP configuration register
+ * IT8784E_SHOW_UARTA	If defined, UARTA will be exposed.
+ * IT8784E_SHOW_UARTB	If defined, UARTB will be exposed.
+ * IT8784E_SHOW_KBC	If defined, the KBC will be exposed.
+ * IT8784E_SHOW_PS2M	If defined, PS/2 mouse support will be exposed.
+ * IT8784E_SHOW_EC	If defined, EC will be exposed.
+ */
+
+#undef SUPERIO_CHIP_NAME
+#define SUPERIO_CHIP_NAME IT8784E
+#include <superio/acpi/pnp.asl>
+
+#undef PNP_DEFAULT_PSC
+#define PNP_DEFAULT_PSC Return (0) /* no power management */
+
+#define CONFIGURE_CONTROL CCTL
+
+Device (SUPERIO_DEV) {
+	Name (_HID, EisaId("PNP0A05"))
+	Name (_STR, Unicode("ITE IT8784E Super I/O"))
+	Name (_UID, SUPERIO_UID(SUPERIO_DEV,))
+
+	/* Mutex for accesses to the configuration ports */
+	Mutex (CRMX, 1)
+
+	/* SuperIO configuration ports */
+	OperationRegion (CREG, SystemIO, SUPERIO_PNP_BASE, 0x02)
+	Field (CREG, ByteAcc, NoLock, Preserve)
+	{
+		PNP_ADDR_REG,	8,
+		PNP_DATA_REG,	8
+	}
+	IndexField (PNP_ADDR_REG, PNP_DATA_REG, ByteAcc, NoLock, Preserve)
+	{
+		Offset (0x02),
+		CONFIGURE_CONTROL,	8, /* Global configure control */
+
+		Offset (0x07),
+		PNP_LOGICAL_DEVICE,	8, /* Logical device selector */
+
+		Offset (0x30),
+		PNP_DEVICE_ACTIVE,	1, /* Logical device activation */
+
+		Offset (0x60),
+		PNP_IO0_HIGH_BYTE,	8, /* First I/O port base - high byte */
+		PNP_IO0_LOW_BYTE,	8, /* First I/O port base - low byte */
+		Offset (0x62),
+		PNP_IO1_HIGH_BYTE,	8, /* Second I/O port base - high byte */
+		PNP_IO1_LOW_BYTE,	8, /* Second I/O port base - low byte */
+
+		Offset (0x70),
+		PNP_IRQ0,		8, /* First IRQ */
+	}
+
+	Method (_CRS)
+	{
+		/* Announce the used i/o ports to the OS */
+		Return (ResourceTemplate () {
+			IO (Decode16, SUPERIO_PNP_BASE, SUPERIO_PNP_BASE, 0x01, 0x02)
+		})
+	}
+
+	#undef PNP_ENTER_MAGIC_1ST
+	#undef PNP_ENTER_MAGIC_2ND
+	#undef PNP_ENTER_MAGIC_3RD
+	#undef PNP_ENTER_MAGIC_4TH
+	#undef PNP_EXIT_MAGIC_1ST
+	#define PNP_ENTER_MAGIC_1ST	0x87
+	#define PNP_ENTER_MAGIC_2ND	0x01
+	#define PNP_ENTER_MAGIC_3RD	0x55
+#if SUPERIO_PNP_BASE == 0x2e
+	#define PNP_ENTER_MAGIC_4TH	0x55
+#else
+	#define PNP_ENTER_MAGIC_4TH	0xaa
+#endif
+	#define PNP_EXIT_SPECIAL_REG	CONFIGURE_CONTROL
+	#define PNP_EXIT_SPECIAL_VAL	0x02
+	#include <superio/acpi/pnp_config.asl>
+
+#ifdef IT8784E_SHOW_UARTA
+	#undef SUPERIO_UART_LDN
+	#undef SUPERIO_UART_DDN
+	#undef SUPERIO_UART_PM_REG
+	#undef SUPERIO_UART_PM_VAL
+	#undef SUPERIO_UART_PM_LDN
+	#define SUPERIO_UART_LDN 1
+	#include <superio/acpi/pnp_uart.asl>
+#endif
+
+#ifdef IT8784E_SHOW_UARTB
+	#undef SUPERIO_UART_LDN
+	#undef SUPERIO_UART_DDN
+	#undef SUPERIO_UART_PM_REG
+	#undef SUPERIO_UART_PM_VAL
+	#undef SUPERIO_UART_PM_LDN
+	#define SUPERIO_UART_LDN 2
+	#include <superio/acpi/pnp_uart.asl>
+#endif
+
+#ifdef IT8784E_SHOW_EC
+	#undef SUPERIO_PNP_HID
+	#undef SUPERIO_PNP_LDN
+	#undef SUPERIO_PNP_DDN
+	#undef SUPERIO_PNP_PM_REG
+	#undef SUPERIO_PNP_PM_VAL
+	#undef SUPERIO_PNP_PM_LDN
+	#undef SUPERIO_PNP_IO0
+	#undef SUPERIO_PNP_IO1
+	#undef SUPERIO_PNP_IO2
+	#undef SUPERIO_PNP_IRQ0
+	#undef SUPERIO_PNP_IRQ1
+	#undef SUPERIO_PNP_DMA
+	#define SUPERIO_PNP_LDN 4
+	#define SUPERIO_PNP_IO0 0x08, 0x08
+	#define SUPERIO_PNP_IO1 0x08, 0x04
+	#define SUPERIO_PNP_IRQ0
+	#include <superio/acpi/pnp_generic.asl>
+#endif
+
+#ifdef IT8784E_SHOW_KBC
+	#undef SUPERIO_KBC_LDN
+	#undef SUPERIO_KBC_PS2M
+	#undef SUPERIO_KBC_PS2LDN
+	#define SUPERIO_KBC_LDN 5
+#ifdef IT8784E_SHOW_PS2M
+	#define SUPERIO_KBC_PS2LDN 6
+#endif
+	#include <superio/acpi/pnp_kbc.asl>
+#endif
+}
diff --git a/src/superio/ite/it8784e/chip.h b/src/superio/ite/it8784e/chip.h
new file mode 100644
index 0000000000..475f9c4061
--- /dev/null
+++ b/src/superio/ite/it8784e/chip.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef SUPERIO_ITE_IT8784E_CHIP_H
+#define SUPERIO_ITE_IT8784E_CHIP_H
+
+#include <superio/ite/common/env_ctrl_chip.h>
+
+struct superio_ite_it8784e_config {
+	struct ite_ec_config ec;
+};
+
+#endif /* SUPERIO_ITE_IT8784E_CHIP_H */
diff --git a/src/superio/ite/it8784e/it8784e.h b/src/superio/ite/it8784e/it8784e.h
new file mode 100644
index 0000000000..6b819fdb71
--- /dev/null
+++ b/src/superio/ite/it8784e/it8784e.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef SUPERIO_ITE_IT8784E_H
+#define SUPERIO_ITE_IT8784E_H
+
+#define IT8784E_SP1	0x01 /* COM1 */
+#define IT8784E_SP2	0x02 /* COM2 */
+#define IT8784E_PP	0x03 /* Printer port */
+#define IT8784E_EC	0x04 /* Environment controller */
+#define IT8784E_KBCK	0x05 /* Keyboard */
+#define IT8784E_KBCM	0x06 /* Mouse */
+#define IT8784E_GPIO	0x07 /* GPIO */
+#define IT8784E_CIR	0x0a /* Consumer IR */
+
+#endif /* SUPERIO_ITE_IT8784E_H */
diff --git a/src/superio/ite/it8784e/superio.c b/src/superio/ite/it8784e/superio.c
new file mode 100644
index 0000000000..85fc42ea60
--- /dev/null
+++ b/src/superio/ite/it8784e/superio.c
@@ -0,0 +1,87 @@
+/* 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 "it8784e.h"
+#include "chip.h"
+
+static void it8784e_init(struct device *const dev)
+{
+	const struct superio_ite_it8784e_config *conf;
+	const struct resource *res;
+
+	if (!dev->enabled)
+		return;
+
+	switch (dev->path.pnp.device) {
+	case IT8784E_EC:
+		conf = dev->chip_info;
+		res = probe_resource(dev, PNP_IDX_IO0);
+		if (!conf || !res)
+			break;
+		ite_ec_init(res->base, &conf->ec);
+		break;
+	case IT8784E_KBCK:
+		pc_keyboard_init(NO_AUX_DEVICE);
+		break;
+	default:
+		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             = it8784e_init,
+	.ops_pnp_mode     = &pnp_conf_mode_870155_aa,
+};
+
+static struct pnp_info pnp_dev_info[] = {
+	/* Serial Port 1 */
+	{ NULL, IT8784E_SP1, PNP_IO0 | PNP_IRQ0 | PNP_MSC0 | PNP_MSC1 |
+			     PNP_MSC2,
+	  0x0ff8, },
+	/* Serial Port 2 */
+	{ NULL, IT8784E_SP2, PNP_IO0 | PNP_IRQ0 | PNP_MSC0 | PNP_MSC1 |
+			     PNP_MSC2,
+	  0x0ff8, },
+	/* Printer Port */
+	{ NULL, IT8784E_PP,  PNP_IO0 | PNP_IO1 | PNP_IRQ0 | PNP_DRQ0 |
+			     PNP_MSC0,
+	  0x0ff8, 0x0ffc, },
+	/* Environmental Controller */
+	{ NULL, IT8784E_EC,  PNP_IO0 | PNP_IO1 | PNP_IRQ0 | PNP_MSC0 |
+			     PNP_MSC1 | PNP_MSC2 | PNP_MSC3 | PNP_MSC4 |
+			     PNP_MSC5 | PNP_MSC6 | PNP_MSCA | PNP_MSCB |
+			     PNP_MSCC,
+	  0x0ff8, 0x0ffc, },
+	/* KBC Keyboard */
+	{ NULL, IT8784E_KBCK, PNP_IO0 | PNP_IO1 | PNP_IRQ0 | PNP_MSC0,
+	  0x0fff, 0x0fff, },
+	/* KBC Mouse */
+	{ NULL, IT8784E_KBCM, PNP_IRQ0 | PNP_MSC0, },
+	/* GPIO */
+	{ NULL, IT8784E_GPIO, PNP_IO0 | PNP_IO1 | PNP_IRQ0 |
+			      PNP_MSC0 | PNP_MSC1 | PNP_MSC2 | PNP_MSC3 |
+			      PNP_MSC4 | PNP_MSC5 | PNP_MSC6 | PNP_MSC7 |
+			      PNP_MSC8 | PNP_MSC9 | PNP_MSCA | PNP_MSCB,
+	  0x0ffc, 0x0fff, },
+	/* Consumer Infrared */
+	{ NULL, IT8784E_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_it8784e_ops = {
+	CHIP_NAME("ITE IT8784E Super I/O")
+	.enable_dev = enable_dev,
+};