google/eve: Add audio devices

Add the audio devices to Eve mainboard:

- Describe Maxim 98927 speaker amps and RT5663 headphone codec
in ACPI so they can be enumerated by the OS.

- Supply NHLT binaries for MAX98927, RT5663, and DMIC_4CH.

BUG=chrome-os-partner:61009
TEST=manual testing on Eve P1 with updated kernel to ensure that
both speakers and headset are functional.  DMIC support is
is still being worked on and is not yet functional.

Change-Id: I5243e35d159a0ed15c6004e94ba5a50b28cff0a9
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://review.coreboot.org/18398
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins)

src/mainboard/google/eve/Kconfig

@@ -8,6 +8,7 @@ config BOARD_SPECIFIC_OPTIONS
 	select DRIVERS_I2C_HID
 	select DRIVERS_I2C_WACOM
 	select DRIVERS_PS2_KEYBOARD
+	select DRIVERS_I2C_MAX98927
 	select DRIVERS_SPI_ACPI
 	select EC_GOOGLE_CHROMEEC
 	select EC_GOOGLE_CHROMEEC_LPC
@@ -64,4 +65,10 @@ config MAX_CPUS
 	int
 	default 8
 
+config INCLUDE_NHLT_BLOBS
+	bool "Include blobs for audio."
+	select NHLT_DMIC_4CH
+	select NHLT_RT5663
+	select NHLT_MAX98927
+
 endif

src/mainboard/google/eve/devicetree.cb

@@ -238,7 +238,30 @@ chip soc/intel/skylake
 		device pci 17.0 off end # SATA
 		device pci 19.0 on  end # UART #2
 		device pci 19.1 off end # I2C #5
-		device pci 19.2 on  end # I2C #4
+		device pci 19.2 on
+			chip drivers/i2c/max98927
+				register "interleave_mode" = "1"
+				register "uid" = "0"
+				register "desc" = ""Right Speaker Amp""
+				register "name" = ""MAXR""
+				device i2c 39 on end
+			end
+			chip drivers/i2c/max98927
+				register "interleave_mode" = "1"
+				register "uid" = "1"
+				register "desc" = ""Left Speaker Amp""
+				register "name" = ""MAXL""
+				device i2c 3a on end
+			end
+			chip drivers/i2c/generic
+				register "hid" = ""10EC5663""
+				register "name" = ""RT53""
+				register "desc" = ""Realtek RT5663""
+				register "irq" = "IRQ_LEVEL_LOW(GPP_D9_IRQ)"
+				register "probed" = "1"
+				device i2c 13 on end
+			end
+		end # I2C #4
 		device pci 1c.0 on
 			chip drivers/intel/wifi
 				register "wake" = "GPE0_PCI_EXP"

src/mainboard/google/eve/mainboard.c

@@ -15,23 +15,63 @@
  */
 
 #include <arch/acpi.h>
+#include <console/console.h>
 #include <device/device.h>
 #include <ec/ec.h>
 #include <vendorcode/google/chromeos/chromeos.h>
 #include <gpio.h>
 #include <soc/gpio.h>
+#include <soc/nhlt.h>
 #include "gpio.h"
 
+static const char *oem_id_maxim = "GOOGLE";
+static const char *oem_table_id_maxim = "EVEMAX";
+
 static void mainboard_init(device_t dev)
 {
 	mainboard_ec_init();
 	gpio_configure_pads(late_gpio_table, ARRAY_SIZE(late_gpio_table));
 }
 
+static unsigned long mainboard_write_acpi_tables(
+	device_t device, unsigned long current, acpi_rsdp_t *rsdp)
+{
+	uintptr_t start_addr;
+	uintptr_t end_addr;
+	struct nhlt *nhlt;
+
+	start_addr = current;
+
+	nhlt = nhlt_init();
+	if (!nhlt)
+		return start_addr;
+
+	/* 4 Channel DMIC array. */
+	if (nhlt_soc_add_dmic_array(nhlt, 4))
+		printk(BIOS_ERR, "Couldn't add 4CH DMIC arrays.\n");
+
+	/* RT5663 Headset codec */
+	if (nhlt_soc_add_rt5663(nhlt, AUDIO_LINK_SSP1))
+		printk(BIOS_ERR, "Couldn't add headset codec.\n");
+
+	/* MAXIM98927 Smart Amps for left and right channel */
+	if (nhlt_soc_add_max98927(nhlt, AUDIO_LINK_SSP0))
+		printk(BIOS_ERR, "Couldn't add max98927\n");
+
+	end_addr = nhlt_soc_serialize_oem_overrides(nhlt, start_addr,
+				    oem_id_maxim, oem_table_id_maxim, 0);
+
+	if (end_addr != start_addr)
+		acpi_add_table(rsdp, (void *)start_addr);
+
+	return end_addr;
+}
+
 static void mainboard_enable(device_t dev)
 {
 	dev->ops->init = mainboard_init;
 	dev->ops->acpi_inject_dsdt_generator = chromeos_dsdt_generator;
+	dev->ops->write_acpi_tables = mainboard_write_acpi_tables;
 }
 
 struct chip_operations mainboard_ops = {