From 320d5528c39f6e8d68f8f52db95ede6978f02f83 Mon Sep 17 00:00:00 2001
From: Seunghwan Kim <sh_.kim@samsung.corp-partner.google.com>
Date: Wed, 22 Jan 2020 10:53:55 +0900
Subject: driver/i2c/max98390: Add i2c driver for Maxim 98390 codec
Add an SSDT generator for Maxim 98390 kernel driver.
Copied from 'drivers/i2c/rt1011'.
BUG=b:149443429
BRANCH=None
TEST=built coreboot and checked audio function with kernel patch on nightfury
Change-Id: I64d776c6c9726eb5822ad4dd82f6826c2a30cb1d
Signed-off-by: Seunghwan Kim <sh_.kim@samsung.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39463
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
---
src/drivers/i2c/max98390/Kconfig | 4 ++
src/drivers/i2c/max98390/Makefile.inc | 1 +
src/drivers/i2c/max98390/chip.h | 17 ++++++
src/drivers/i2c/max98390/max98390.c | 110 ++++++++++++++++++++++++++++++++++
4 files changed, 132 insertions(+)
create mode 100644 src/drivers/i2c/max98390/Kconfig
create mode 100644 src/drivers/i2c/max98390/Makefile.inc
create mode 100644 src/drivers/i2c/max98390/chip.h
create mode 100644 src/drivers/i2c/max98390/max98390.c
(limited to 'src')
diff --git a/src/drivers/i2c/max98390/Kconfig b/src/drivers/i2c/max98390/Kconfig
new file mode 100644
index 0000000000..7ea5589e9a
--- /dev/null
+++ b/src/drivers/i2c/max98390/Kconfig
@@ -0,0 +1,4 @@
+config DRIVERS_I2C_MAX98390
+ bool
+ default n
+ depends on HAVE_ACPI_TABLES
diff --git a/src/drivers/i2c/max98390/Makefile.inc b/src/drivers/i2c/max98390/Makefile.inc
new file mode 100644
index 0000000000..09ef81b9ea
--- /dev/null
+++ b/src/drivers/i2c/max98390/Makefile.inc
@@ -0,0 +1 @@
+ramstage-$(CONFIG_DRIVERS_I2C_MAX98390) += max98390.c
diff --git a/src/drivers/i2c/max98390/chip.h b/src/drivers/i2c/max98390/chip.h
new file mode 100644
index 0000000000..26cad4c728
--- /dev/null
+++ b/src/drivers/i2c/max98390/chip.h
@@ -0,0 +1,17 @@
+/* This file is part of the coreboot project. */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+/*
+ * MAXIM MAX98390 audio codec devicetree bindings
+ */
+
+struct drivers_i2c_max98390_config {
+ const char *name; /* ACPI Device Name */
+ const char *desc; /* Device Description */
+ unsigned int uid; /* ACPI _UID */
+
+ /* The VPD key of calibrated speaker resistance. */
+ const char *r0_calib_key;
+ /* The VPD key of temperature during speaker calibration. */
+ const char *temperature_calib_key;
+};
diff --git a/src/drivers/i2c/max98390/max98390.c b/src/drivers/i2c/max98390/max98390.c
new file mode 100644
index 0000000000..d2bb14fc8b
--- /dev/null
+++ b/src/drivers/i2c/max98390/max98390.c
@@ -0,0 +1,110 @@
+/* This file is part of the coreboot project. */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <arch/acpi.h>
+#include <arch/acpi_device.h>
+#include <arch/acpigen.h>
+#include <console/console.h>
+#include <device/i2c.h>
+#include <device/device.h>
+#include <device/path.h>
+#include <stdint.h>
+#include <vendorcode/google/chromeos/chromeos.h>
+#include "chip.h"
+
+#define MAX98390_ACPI_HID "MX98390"
+
+#define MAX98390_DP_INT(key, val) acpi_dp_add_integer(dp, "maxim," key, (val))
+
+static void max98390_fill_ssdt(struct device *dev)
+{
+ struct drivers_i2c_max98390_config *config = dev->chip_info;
+ const char *scope = acpi_device_scope(dev);
+ struct acpi_i2c i2c = {
+ .address = dev->path.i2c.device,
+ .mode_10bit = dev->path.i2c.mode_10bit,
+ .speed = I2C_SPEED_FAST,
+ .resource = scope,
+ };
+ struct acpi_dp *dp;
+ uint64_t r0_value, temp_value;
+
+ if (!dev->enabled || !scope)
+ return;
+
+ /* Device */
+ acpigen_write_scope(scope);
+ acpigen_write_device(acpi_device_name(dev));
+ acpigen_write_name_string("_HID", MAX98390_ACPI_HID);
+ acpigen_write_name_integer("_UID", config->uid);
+ acpigen_write_name_string("_DDN", config->desc);
+ acpigen_write_STA(acpi_device_status(dev));
+
+ /* Resources */
+ acpigen_write_name("_CRS");
+ acpigen_write_resourcetemplate_header();
+ acpi_device_write_i2c(&i2c);
+ acpigen_write_resourcetemplate_footer();
+
+ /* Device Properties */
+ if (CONFIG(CHROMEOS_DSM_CALIB)) {
+ if (get_dsm_calibration_from_key(config->r0_calib_key, &r0_value)
+ || get_dsm_calibration_from_key(config->temperature_calib_key,
+ &temp_value)) {
+ printk(BIOS_ERR,
+ "Failed to get dsm_calib parameters from VPD"
+ " with key %s and %s\n",
+ config->r0_calib_key, config->temperature_calib_key);
+ } else {
+ dp = acpi_dp_new_table("_DSD");
+ MAX98390_DP_INT("r0_calib", r0_value);
+ MAX98390_DP_INT("temperature_calib", temp_value);
+ acpi_dp_write(dp);
+ printk(BIOS_INFO, "set dsm_calib properties\n");
+ }
+ }
+
+ acpigen_pop_len(); /* Device */
+ acpigen_pop_len(); /* Scope */
+
+ printk(BIOS_INFO, "%s: %s address 0%xh\n", acpi_device_path(dev), dev->chip_ops->name,
+ dev->path.i2c.device);
+}
+
+static const char *max98390_acpi_name(const struct device *dev)
+{
+ struct drivers_i2c_max98390_config *config = dev->chip_info;
+ static char name[5];
+
+ if (config->name)
+ return config->name;
+
+ snprintf(name, sizeof(name), "D%03.3X", dev->path.i2c.device);
+ return name;
+}
+
+static struct device_operations max98390_ops = {
+ .read_resources = noop_read_resources,
+ .set_resources = noop_set_resources,
+ .acpi_name = max98390_acpi_name,
+ .acpi_fill_ssdt_generator = max98390_fill_ssdt,
+};
+
+static void max98390_enable(struct device *dev)
+{
+ struct drivers_i2c_max98390_config *config = dev->chip_info;
+
+ if (!config)
+ return;
+
+ dev->ops = &max98390_ops;
+
+ /* Name the device as per description provided in devicetree */
+ if (config->desc)
+ dev->name = config->desc;
+}
+
+struct chip_operations drivers_i2c_max98390_ops = {
+ CHIP_NAME("Maxim MAX98390 Codec")
+ .enable_dev = max98390_enable
+};
--
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