diff options
| -rw-r--r-- | src/drivers/i2c/max98396/Kconfig | 3 | ||||
| -rw-r--r-- | src/drivers/i2c/max98396/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/drivers/i2c/max98396/chip.h | 26 | ||||
| -rw-r--r-- | src/drivers/i2c/max98396/max98396.c | 101 |
4 files changed, 131 insertions, 0 deletions
diff --git a/src/drivers/i2c/max98396/Kconfig b/src/drivers/i2c/max98396/Kconfig new file mode 100644 index 0000000000..59f418f9e1 --- /dev/null +++ b/src/drivers/i2c/max98396/Kconfig @@ -0,0 +1,3 @@ +config DRIVERS_I2C_MAX98396 + bool "Enable AMP MAX98396" + depends on HAVE_ACPI_TABLES diff --git a/src/drivers/i2c/max98396/Makefile.inc b/src/drivers/i2c/max98396/Makefile.inc new file mode 100644 index 0000000000..230f5d6d91 --- /dev/null +++ b/src/drivers/i2c/max98396/Makefile.inc @@ -0,0 +1 @@ +ramstage-$(CONFIG_DRIVERS_I2C_MAX98396) += max98396.c diff --git a/src/drivers/i2c/max98396/chip.h b/src/drivers/i2c/max98396/chip.h new file mode 100644 index 0000000000..63a2440acf --- /dev/null +++ b/src/drivers/i2c/max98396/chip.h @@ -0,0 +1,26 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +/* + * Maxim MAX98396 audio codec devicetree bindings + */ + +#include <stdint.h> + +struct drivers_i2c_max98396_config { + /* I2C Bus Frequency in Hertz (default 400kHz) */ + uint32_t bus_speed; + /* 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; + /* slot number of speaker DSP monitor */ + uint32_t spkfb_slot_no; + /* Use GPIO based reset gpio */ + struct acpi_gpio reset_gpio; +}; diff --git a/src/drivers/i2c/max98396/max98396.c b/src/drivers/i2c/max98396/max98396.c new file mode 100644 index 0000000000..5288c4f4b1 --- /dev/null +++ b/src/drivers/i2c/max98396/max98396.c @@ -0,0 +1,101 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <acpi/acpi_device.h> +#include <acpi/acpigen.h> +#include <console/console.h> +#include <device/i2c_simple.h> +#include <device/device.h> +#include <device/path.h> + +#include "chip.h" + +#define MAX98396_ACPI_HID "ADS8396" + +static void max98396_fill_ssdt(const struct device *dev) +{ + struct drivers_i2c_max98396_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_FAST, + .resource = scope, + }; + struct acpi_dp *dp; + const char *path = acpi_device_path(dev); + + if (!scope) { + printk(BIOS_ERR, "%s: dev not enabled\n", __func__); + return; + } + + /* Device */ + acpigen_write_scope(scope); + acpigen_write_device(acpi_device_name(dev)); + acpigen_write_name_string("_HID", MAX98396_ACPI_HID); + acpigen_write_name_integer("_UID", config->uid); + if (config->desc) + 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); + if (config->reset_gpio.pin_count) + acpi_device_write_gpio(&config->reset_gpio); + acpigen_write_resourcetemplate_footer(); + + /* Device Properties */ + dp = acpi_dp_new_table("_DSD"); + + acpi_dp_add_integer(dp, "adi,vmon-slot-no", config->vmon_slot_no); + acpi_dp_add_integer(dp, "adi,imon-slot-no", config->imon_slot_no); + acpi_dp_add_integer(dp, "adi,spkfb-slot-no", config->spkfb_slot_no); + if (config->reset_gpio.pin_count) + acpi_dp_add_gpio(dp, "reset-gpios", path, + 0, /* Index = 0 */ + 0, /* Pin = 0 */ + config->reset_gpio.active_low); + acpi_dp_write(dp); + + acpigen_write_device_end(); + acpigen_write_scope_end(); + + printk(BIOS_INFO, "%s: %s address 0%xh\n", acpi_device_path(dev), + dev->chip_ops->name, dev->path.i2c.device); +} + +static const char *max98396_acpi_name(const struct device *dev) +{ + struct drivers_i2c_max98396_config *config = dev->chip_info; + static char name[ACPI_NAME_BUFFER_SIZE]; + + if (config->name && strlen(config->name) == 4) + return config->name; + + snprintf(name, sizeof(name), "D%03.3X", dev->path.i2c.device); + return name; +} + +static struct device_operations max98396_ops = { + .read_resources = noop_read_resources, + .set_resources = noop_set_resources, + .acpi_name = max98396_acpi_name, + .acpi_fill_ssdt = max98396_fill_ssdt, +}; + +static void max98396_enable(struct device *dev) +{ + struct drivers_i2c_max98396_config *config = dev->chip_info; + + dev->ops = &max98396_ops; + + if (config->desc) + dev->name = config->desc; +} + +struct chip_operations drivers_i2c_max98396_ops = { + CHIP_NAME("Maxim MAX98396 Codec") + .enable_dev = max98396_enable +}; |