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authorN, Harshapriya <harshapriya.n@intel.com>2017-11-27 15:38:53 -0800
committerMartin Roth <martinroth@google.com>2018-01-23 05:17:03 +0000
commitc14a99fedac6d054f958ab86bf68c8ae3966e9fe (patch)
tree1ede1e6ab14f1012640b172473cc48b08e5de207 /src/drivers/i2c
parent6ad88274c906c4e579340d3ab68e55e511a3308a (diff)
downloadcoreboot-c14a99fedac6d054f958ab86bf68c8ae3966e9fe.tar.xz
drivers/i2c/max98373: Add driver for generating device in SSDT
Add a device driver to generate the device and required properties into the SSDT for max98373. TEST=verified SSDT contained relevant params BUG=None Change-Id: Id45f74e52855f4b19276e1d3d673d5448207ef4b Signed-off-by: Sathyanarayana Nujella <sathyanarayana.nujella@intel.com> Signed-off-by: N, Harshapriya <harshapriya.n@intel.com> Reviewed-on: https://review.coreboot.org/22673 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/drivers/i2c')
-rw-r--r--src/drivers/i2c/max98373/Kconfig4
-rw-r--r--src/drivers/i2c/max98373/Makefile.inc1
-rw-r--r--src/drivers/i2c/max98373/chip.h34
-rw-r--r--src/drivers/i2c/max98373/max98373.c104
4 files changed, 143 insertions, 0 deletions
diff --git a/src/drivers/i2c/max98373/Kconfig b/src/drivers/i2c/max98373/Kconfig
new file mode 100644
index 0000000000..fe1473e1ad
--- /dev/null
+++ b/src/drivers/i2c/max98373/Kconfig
@@ -0,0 +1,4 @@
+config DRIVERS_I2C_MAX98373
+ bool
+ default n
+ depends on HAVE_ACPI_TABLES
diff --git a/src/drivers/i2c/max98373/Makefile.inc b/src/drivers/i2c/max98373/Makefile.inc
new file mode 100644
index 0000000000..0a8871d987
--- /dev/null
+++ b/src/drivers/i2c/max98373/Makefile.inc
@@ -0,0 +1 @@
+ramstage-$(CONFIG_DRIVERS_I2C_MAX98373) += max98373.c
diff --git a/src/drivers/i2c/max98373/chip.h b/src/drivers/i2c/max98373/chip.h
new file mode 100644
index 0000000000..150998b83b
--- /dev/null
+++ b/src/drivers/i2c/max98373/chip.h
@@ -0,0 +1,34 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2017 Intel Corp.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/*
+ * Maxim MAX98373 audio codec devicetree bindings
+ */
+struct drivers_i2c_max98373_config {
+ /* I2C Bus Frequency in Hertz (default 400kHz) */
+ uint32_t bus_speed;
+ /* Set ‘1’ if I2S channel size is not 32bit. */
+ bool interleave_mode;
+ /* Identifier for chips */
+ uint32_t uid;
+ /* Device Description */
+ const char *desc;
+ /* ACPI Device Name */
+ const char *name;
+ /* slot number where voltage feedback will be received */
+ uint32_t vmon_slot_no;
+ /* slot number where current feedback will be received */
+ uint32_t imon_slot_no;
+};
diff --git a/src/drivers/i2c/max98373/max98373.c b/src/drivers/i2c/max98373/max98373.c
new file mode 100644
index 0000000000..576667176a
--- /dev/null
+++ b/src/drivers/i2c/max98373/max98373.c
@@ -0,0 +1,104 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2017 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <arch/acpi.h>
+#include <arch/acpi_device.h>
+#include <arch/acpigen.h>
+#include <console/console.h>
+#include <device/i2c_simple.h>
+#include <device/device.h>
+#include <device/path.h>
+#include <stdint.h>
+#include <string.h>
+#include "chip.h"
+
+#define MAX98373_ACPI_NAME "MAXI"
+#define MAX98373_ACPI_HID "MX98373"
+
+static void max98373_fill_ssdt(struct device *dev)
+{
+ struct drivers_i2c_max98373_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 = config->bus_speed ? : I2C_SPEED_STANDARD,
+ .resource = scope,
+ };
+ struct acpi_dp *dp;
+
+ if (!dev->enabled || !scope) {
+ printk(BIOS_ERR, "%s: dev not enabled", __func__);
+ return;
+ }
+
+ /* Device */
+ acpigen_write_scope(scope);
+ acpigen_write_device(acpi_device_name(dev));
+ acpigen_write_name_string("_HID", MAX98373_ACPI_HID);
+ acpigen_write_name_integer("_UID", config->uid);
+ if (config->desc)
+ acpigen_write_name_string("_DDN", config->desc);
+ acpigen_write_STA(ACPI_STATUS_DEVICE_ALL_ON);
+
+ /* Resources */
+ acpigen_write_name("_CRS");
+ acpigen_write_resourcetemplate_header();
+ acpi_device_write_i2c(&i2c);
+ acpigen_write_resourcetemplate_footer();
+
+ /* Device Properties */
+ dp = acpi_dp_new_table("_DSD");
+
+ acpi_dp_add_integer(dp, "interleave_mode", config->interleave_mode);
+ acpi_dp_add_integer(dp, "vmon-slot-no", config->vmon_slot_no);
+ acpi_dp_add_integer(dp, "imon-slot-no", config->imon_slot_no);
+
+ acpi_dp_write(dp);
+
+ 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 *max98373_acpi_name(const struct device *dev)
+{
+ struct drivers_i2c_max98373_config *config = dev->chip_info;
+
+ if (config->name)
+ return config->name;
+
+ return MAX98373_ACPI_NAME;
+}
+
+static struct device_operations max98373_ops = {
+ .read_resources = DEVICE_NOOP,
+ .set_resources = DEVICE_NOOP,
+ .enable_resources = DEVICE_NOOP,
+ .acpi_name = &max98373_acpi_name,
+ .acpi_fill_ssdt_generator = &max98373_fill_ssdt,
+};
+
+static void max98373_enable(struct device *dev)
+{
+ dev->ops = &max98373_ops;
+}
+
+struct chip_operations drivers_i2c_max98373_ops = {
+ CHIP_NAME("Maxim MAX98373 Codec")
+ .enable_dev = &max98373_enable
+};