drivers/i2c/cs35l53: Add driver for generating device in SSDT
This patch is adding support for Cirrus Logic CS35l41/CS35l53
smart amplifier. This part is now used in number of new chromebook's
HW designs by several vendors.
This driver uses the ACPI Device Property interface to generate
the required parameters into the _DSD table format expected by
the kernel. For detailed information about these properties, please
check Linux kernel documentation:
/Documentation/devicetree/bindings/sound/cirrus,cs35l41.yaml
Change-Id: I2cbb1cef89f8d56ee73fab06c68933a2ab8c3606
Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Signed-off-by: Vitaly Rodionov <vitaly.rodionov@cirrus.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61448
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
diff --git a/src/drivers/i2c/cs35l53/cs35l53.c b/src/drivers/i2c/cs35l53/cs35l53.c
new file mode 100644
index 0000000..1909bef
--- /dev/null
+++ b/src/drivers/i2c/cs35l53/cs35l53.c
@@ -0,0 +1,147 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <acpi/acpi.h>
+#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 CS35L53_ACPI_HID "CSC3541"
+
+static void cs35l53_fill_ssdt(const struct device *dev)
+{
+ struct drivers_i2c_cs35l53_config *config = dev->chip_info;
+ const char *scope = acpi_device_scope(dev);
+ const char *path = acpi_device_path(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 *dsd;
+ int gpio_index = 0;
+
+ if (!scope)
+ return;
+
+ /* Device */
+ acpigen_write_scope(scope);
+ acpigen_write_device(acpi_device_name(dev));
+ acpigen_write_name_string("_HID", CS35L53_ACPI_HID);
+ acpigen_write_name_integer("_UID", 0);
+ acpigen_write_name_string("_DDN", dev->chip_ops->name);
+ acpigen_write_name_string("_SUB", config->sub);
+ acpigen_write_STA(acpi_device_status(dev));
+
+ /* Resources */
+ acpigen_write_name("_CRS");
+ acpigen_write_resourcetemplate_header();
+ acpi_device_write_i2c(&i2c);
+ /* Use either Interrupt() or GpioInt() */
+ if (config->irq_gpio.pin_count)
+ acpi_device_write_gpio(&config->irq_gpio);
+ else
+ acpi_device_write_interrupt(&config->irq);
+
+ /* for cs35l53 reset gpio */
+ if (config->reset_gpio.pin_count)
+ acpi_device_write_gpio(&config->reset_gpio);
+
+ acpigen_write_resourcetemplate_footer();
+
+ /* Add Child Device Properties */
+ dsd = acpi_dp_new_table("_DSD");
+ if (config->irq_gpio.pin_count)
+ acpi_dp_add_gpio(dsd, "irq-gpios", path,
+ gpio_index++, /* Index = 0 */
+ 0, /* Pin = 0 (There is a single pin in the GPIO resource). */
+ config->irq_gpio.active_low);
+ if (config->reset_gpio.pin_count)
+ acpi_dp_add_gpio(dsd, "reset-gpios", path,
+ gpio_index++, /* Index = 0 or 1 (if irq gpio is written). */
+ 0, /* Pin = 0 (There is a single pin in the GPIO resource). */
+ config->reset_gpio.active_low);
+
+ acpi_dp_add_integer(dsd, "cirrus,boost-type", config->boost_type);
+
+ switch (config->boost_type) {
+ case INTERNAL_BOOST:
+ if ((config->boost_peak_milliamp > 4500) ||
+ (config->boost_peak_milliamp < 1600) ||
+ (config->boost_peak_milliamp % 50)) {
+ printk(BIOS_ERR,
+ "%s: Incorrect boost_peak_milliamp(%d). Using default of 4500 mA\n",
+ __func__, config->boost_peak_milliamp);
+ config->boost_peak_milliamp = 4500;
+ }
+ acpi_dp_add_integer(dsd, "cirrus,boost-peak-milliamp",
+ config->boost_peak_milliamp);
+ acpi_dp_add_integer(dsd, "cirrus,boost-ind-nanohenry",
+ config->boost_ind_nanohenry);
+ acpi_dp_add_integer(dsd, "cirrus,boost-cap-microfarad",
+ config->boost_cap_microfarad);
+ break;
+ case EXTERNAL_BOOST:
+ config->gpio1_output_enable = true;
+ config->gpio1_src_select = GPIO1_SRC_GPIO;
+ break;
+ default:
+ break;
+ }
+
+ acpi_dp_add_integer(dsd, "cirrus,asp-sdout-hiz", config->asp_sdout_hiz);
+ acpi_dp_add_integer(dsd, "cirrus,gpio1-polarity-invert",
+ config->gpio1_polarity_invert);
+ acpi_dp_add_integer(dsd, "cirrus,gpio1-output-enable",
+ config->gpio1_output_enable);
+ acpi_dp_add_integer(dsd, "cirrus,gpio1-src-select", config->gpio1_src_select);
+ acpi_dp_add_integer(dsd, "cirrus,gpio2-polarity-invert",
+ config->gpio2_polarity_invert);
+ acpi_dp_add_integer(dsd, "cirrus,gpio2-output-enable",
+ config->gpio2_output_enable);
+ acpi_dp_add_integer(dsd, "cirrus,gpio2-src-select", config->gpio2_src_select);
+
+ /* Write Device Property Hierarchy */
+ acpi_dp_write(dsd);
+
+ acpigen_pop_len(); /* Device */
+ acpigen_pop_len(); /* Scope */
+
+ printk(BIOS_INFO, "%s: %s address 0%xh irq %d\n",
+ acpi_device_path(dev), dev->chip_ops->name,
+ dev->path.i2c.device, config->irq.pin);
+}
+
+static const char *cs35l53_acpi_name(const struct device *dev)
+{
+ struct drivers_i2c_cs35l53_config *config = dev->chip_info;
+ static char name[ACPI_NAME_BUFFER_SIZE];
+
+ if (config->name)
+ return config->name;
+
+ snprintf(name, sizeof(name), "D%03.3X", dev->path.i2c.device);
+ return name;
+}
+
+static struct device_operations cs35l53_ops = {
+ .read_resources = noop_read_resources,
+ .set_resources = noop_set_resources,
+ .acpi_name = cs35l53_acpi_name,
+ .acpi_fill_ssdt = cs35l53_fill_ssdt,
+};
+
+static void cs35l53_enable(struct device *dev)
+{
+ dev->ops = &cs35l53_ops;
+}
+
+struct chip_operations drivers_i2c_cs35l53_ops = {
+ CHIP_NAME("Cirrus Logic CS35L53 Audio Codec")
+ .enable_dev = cs35l53_enable
+};