superio/nuvoton/nct6687d: Add ramstage driver and ACPI

TEST=Boot MSI PRO Z690-A WIFI DDR4 with SP1, KBC and EC exposed
to OS via ACPI. Configure SP1, ACPI, KBC and EC devices via
devicetree.

Signed-off-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Change-Id: Ia489a39956c1448c7f11845ecc9e1df83ccb25ff
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63927
Reviewed-by: Krystian Hebel <krystian.hebel@3mdeb.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

3 files changed, 270 insertions, 0 deletions

diff --git a/src/superio/nuvoton/nct6687d/Makefile.inc b/src/superio/nuvoton/nct6687d/Makefile.inc
new file mode 100644
index 0000000000..d4785f726e
--- /dev/null
+++ b/src/superio/nuvoton/nct6687d/Makefile.inc
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+ramstage-$(CONFIG_SUPERIO_NUVOTON_NCT6687D) += superio.c
diff --git a/src/superio/nuvoton/nct6687d/acpi/superio.asl b/src/superio/nuvoton/nct6687d/acpi/superio.asl
new file mode 100644
index 0000000000..ebddeaeb08
--- /dev/null
+++ b/src/superio/nuvoton/nct6687d/acpi/superio.asl
@@ -0,0 +1,175 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/*
+ * Include this file into a mainboard's DSDT _SB device tree and it will
+ * expose the NCT6687D 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 PP		Implemented, untested
+ * 0x2 SP1		Implemented, untested
+ * 0x3 SP1		Implemented, untested
+ * 0x5 KBC		Implemented, untested
+ * 0x8 GPIO		Implemented, untested
+ * 0xb EC		Implemented, untested
+ *
+ * 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
+ * NCT6687D_SHOW_PP	If defined, the parallel port will be exposed.
+ * NCT6687D_SHOW_SP1	If defined, Serial Port 1 will be exposed.
+ * NCT6687D_SHOW_SP2	If defined, Serial Port 2 will be exposed.
+ * NCT6687D_SHOW_KBC	If defined, the Keyboard Controller will be exposed.
+ * NCT6687D_SHOW_GPIO	If defined, GPIO support will be exposed.
+ * NCT6687D_SHOW_EC	If defined, the Environment Controller will be exposed.
+ */
+
+#undef SUPERIO_CHIP_NAME
+#define SUPERIO_CHIP_NAME NCT6687D
+#include <superio/acpi/pnp.asl>
+
+#undef PNP_DEFAULT_PSC
+#define PNP_DEFAULT_PSC Return (0) /* no power management */
+
+Device(SUPERIO_DEV) {
+	Name (_HID, EisaId("PNP0A05"))
+	Name (_STR, Unicode("Nuvoton NCT6687D Super I/O"))
+	Name (_UID, SUPERIO_UID(SUPERIO_DEV,))
+
+	/* 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 (0x07),
+		PNP_LOGICAL_DEVICE,	8, /* Logical device selector */
+
+		Offset (0x30),
+		PNP_DEVICE_ACTIVE,	1, /* Logical device activation */
+		ACT1,			1, /* Logical device activation */
+		ACT2,			1, /* Logical device activation */
+		ACT3,			1, /* Logical device activation */
+		ACT4,			1, /* Logical device activation */
+		ACT5,			1, /* Logical device activation */
+		ACT6,			1, /* Logical device activation */
+		ACT7,			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 (0x64),
+		PNP_IO2_HIGH_BYTE,	8, /* Third I/O port base - high byte */
+		PNP_IO2_LOW_BYTE,	8, /* Third I/O port base - low byte */
+
+		Offset (0x70),
+		PNP_IRQ0,		8, /* First IRQ */
+		Offset (0x72),
+		PNP_IRQ1,		8, /* Second IRQ */
+		Offset (0x74),
+		PNP_DMA0,		8, /* DRQ */
+	}
+
+	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
+	#undef PNP_EXIT_SPECIAL_REG
+	#undef PNP_EXIT_SPECIAL_VAL
+	#define PNP_ENTER_MAGIC_1ST	0x87
+	#define PNP_ENTER_MAGIC_2ND	0x87
+	#define PNP_EXIT_MAGIC_1ST	0xaa
+	#include <superio/acpi/pnp_config.asl>
+
+#ifdef NCT6687D_SHOW_PP
+	#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
+	/*
+	 * The extra code required to dynamically reflect ECP in the HID
+	 * isn't currently justified, so the HID is hardcoded as not
+	 * using ECP. "PNP0401" would indicate ECP.
+	 */
+	#define SUPERIO_PNP_HID "PNP0400"
+	#define SUPERIO_PNP_LDN 1
+	#define SUPERIO_PNP_IO0 0x08, 0x08
+	#define SUPERIO_PNP_IRQ0
+	#define SUPERIO_PNP_DMA
+	#include <superio/acpi/pnp_generic.asl>
+#endif
+
+#ifdef NCT6687D_SHOW_SP1
+	#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 NCT6687D_SHOW_SP2
+	#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 3
+	#include <superio/acpi/pnp_uart.asl>
+#endif
+
+#ifdef NCT6687D_SHOW_KBC
+	#undef SUPERIO_KBC_LDN
+	#undef SUPERIO_KBC_PS2M
+	#undef SUPERIO_KBC_PS2LDN
+	#define SUPERIO_KBC_LDN 5
+	#define SUPERIO_KBC_PS2M
+	#include <superio/acpi/pnp_kbc.asl>
+#endif
+
+#ifdef NCT6687D_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 11
+	#define SUPERIO_PNP_IO0 0x08, 0x08
+	#define SUPERIO_PNP_IRQ0
+	#include <superio/acpi/pnp_generic.asl>
+#endif
+
+}
diff --git a/src/superio/nuvoton/nct6687d/superio.c b/src/superio/nuvoton/nct6687d/superio.c
new file mode 100644
index 0000000000..4795659118
--- /dev/null
+++ b/src/superio/nuvoton/nct6687d/superio.c
@@ -0,0 +1,92 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <console/console.h>
+#include <device/device.h>
+#include <device/pnp.h>
+#include <pc80/keyboard.h>
+#include <option.h>
+#include <superio/conf_mode.h>
+
+#include "nct6687d.h"
+
+#define MAINBOARD_POWER_OFF	0
+#define MAINBOARD_POWER_ON	1
+#define MAINBOARD_POWER_KEEP	2
+
+/* 0xeb register definitions */
+#define NCT6687D_ACPI_POWER_LOSS_CONTROL_MASK	0x60
+#define NCT6687D_ACPI_POWER_LOSS_CONTROL_SHIFT	5
+#define NCT6687D_ACPI_POWER_ALWAYS_OFF		(0 << NCT6687D_ACPI_POWER_LOSS_CONTROL_SHIFT)
+#define NCT6687D_ACPI_POWER_ALWAYS_ON		(1 << NCT6687D_ACPI_POWER_LOSS_CONTROL_SHIFT)
+#define NCT6687D_ACPI_POWER_PREV_STATE		(2 << NCT6687D_ACPI_POWER_LOSS_CONTROL_SHIFT)
+#define NCT6687D_ACPI_POWER_USER_DEFINED	(3 << NCT6687D_ACPI_POWER_LOSS_CONTROL_SHIFT)
+
+static void nct6687d_init(struct device *dev)
+{
+	if (!dev->enabled)
+		return;
+
+	switch (dev->path.pnp.device) {
+	/* TODO: Might potentially need code for EC, GPIOs, etc. */
+	case NCT6687D_KBC:
+		pc_keyboard_init(PROBE_AUX_DEVICE);
+		break;
+	case NCT6687D_ACPI:
+		uint8_t byte;
+		uint8_t power_status;
+		/* Set power state after power fail */
+		power_status = get_uint_option("power_on_after_fail",
+				CONFIG_MAINBOARD_POWER_FAILURE_STATE);
+		pnp_enter_conf_mode(dev);
+		pnp_set_logical_device(dev);
+		byte = pnp_read_config(dev, 0xeb);
+		byte &= ~NCT6687D_ACPI_POWER_LOSS_CONTROL_MASK;
+		if (power_status == MAINBOARD_POWER_ON)
+			byte |= NCT6687D_ACPI_POWER_ALWAYS_ON;
+		else if (power_status == MAINBOARD_POWER_KEEP)
+			byte |= NCT6687D_ACPI_POWER_PREV_STATE;
+		pnp_write_config(dev, 0xeb, byte);
+		pnp_exit_conf_mode(dev);
+		printk(BIOS_INFO, "set power %s after power fail\n",
+		       power_status ? "on" : "off");
+		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             = nct6687d_init,
+	.ops_pnp_mode     = &pnp_conf_mode_8787_aa,
+};
+
+static struct pnp_info pnp_dev_info[] = {
+	{ NULL, NCT6687D_PP, PNP_IO0 | PNP_IRQ0 | PNP_DRQ0 | PNP_MSC0, 0x0FF8,},
+	{ NULL, NCT6687D_SP1, PNP_IO0 | PNP_IRQ0 | PNP_MSC0, 0x0FF8, },
+	{ NULL, NCT6687D_SP2, PNP_IO0 | PNP_IRQ0 | PNP_MSC0 | PNP_MSC1, 0x0FF8, },
+	{ NULL, NCT6687D_KBC, PNP_IO0 | PNP_IO1 | PNP_IRQ0 | PNP_IRQ1 | PNP_MSC0,
+		0x0FFF, 0x0FFF, },
+	{ NULL, NCT6687D_CIR, PNP_IO0 | PNP_IRQ0 | PNP_MSC0 | PNP_MSC1 | PNP_MSC2 | PNP_MSC3,
+		0x0FF8, },
+	{ NULL, NCT6687D_GPIO_0_7, PNP_IO0 | PNP_IRQ0, 0x0FF0,},
+	{ NULL, NCT6687D_P80_UART},
+	{ NULL, NCT6687D_GPIO_8_9_AF},
+	{ NULL, NCT6687D_ACPI, PNP_IO0 | PNP_IRQ0, 0x0FF8,},
+	{ NULL, NCT6687D_EC, PNP_IO0 | PNP_IRQ0, 0x0FF8,},
+	{ NULL, NCT6687D_RTC},
+	{ NULL, NCT6687D_SLEEP_PWR},
+	{ NULL, NCT6687D_TACH_PWM},
+	{ NULL, NCT6687D_FREG},
+};
+
+static void enable_dev(struct device *dev)
+{
+	pnp_enable_devices(dev, &ops, ARRAY_SIZE(pnp_dev_info), pnp_dev_info);
+}
+
+struct chip_operations superio_nuvoton_nct6687d_ops = {
+	CHIP_NAME("NUVOTON NCT6687D Super I/O")
+	.enable_dev = enable_dev,
+};