From f9ed4d20f16facc486b960e0372d7a9dc0490c81 Mon Sep 17 00:00:00 2001 From: Eric Lai Date: Mon, 16 Nov 2020 15:38:53 +0800 Subject: drivers/i2c: Add a driver for Semtech SX9324 This adds a new driver for the SX9324 proximity detector device. Follow SX9324 datasheet Rev3. BUG=b:172397658 BRANCH=zork TEST=Test sx9324 is working as expected. Signed-off-by: Eric Lai Change-Id: Ifd582482728a2f535ed85f6696b2f5a4529ba421 Reviewed-on: https://review.coreboot.org/c/coreboot/+/47640 Reviewed-by: Tim Wawrzynczak Reviewed-by: Angel Pons Tested-by: build bot (Jenkins) --- src/drivers/i2c/sx9324/Kconfig | 6 +++ src/drivers/i2c/sx9324/Makefile.inc | 1 + src/drivers/i2c/sx9324/chip.h | 31 +++++++++++ src/drivers/i2c/sx9324/registers.h | 50 +++++++++++++++++ src/drivers/i2c/sx9324/sx9324.c | 104 ++++++++++++++++++++++++++++++++++++ 5 files changed, 192 insertions(+) create mode 100644 src/drivers/i2c/sx9324/Kconfig create mode 100644 src/drivers/i2c/sx9324/Makefile.inc create mode 100644 src/drivers/i2c/sx9324/chip.h create mode 100644 src/drivers/i2c/sx9324/registers.h create mode 100644 src/drivers/i2c/sx9324/sx9324.c diff --git a/src/drivers/i2c/sx9324/Kconfig b/src/drivers/i2c/sx9324/Kconfig new file mode 100644 index 0000000000..77f6967b7e --- /dev/null +++ b/src/drivers/i2c/sx9324/Kconfig @@ -0,0 +1,6 @@ +config DRIVERS_I2C_SX9324 + bool + default n + depends on HAVE_ACPI_TABLES + help + Board has a Semtech SX9324 proximity sensor. diff --git a/src/drivers/i2c/sx9324/Makefile.inc b/src/drivers/i2c/sx9324/Makefile.inc new file mode 100644 index 0000000000..8811c996b0 --- /dev/null +++ b/src/drivers/i2c/sx9324/Makefile.inc @@ -0,0 +1 @@ +ramstage-$(CONFIG_DRIVERS_I2C_SX9324) += sx9324.c diff --git a/src/drivers/i2c/sx9324/chip.h b/src/drivers/i2c/sx9324/chip.h new file mode 100644 index 0000000000..9c9dd3cf35 --- /dev/null +++ b/src/drivers/i2c/sx9324/chip.h @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef __DRIVERS_I2C_SX9324_CHIP_H__ +#define __DRIVERS_I2C_SX9324_CHIP_H__ + +#include +#include + +#define REGISTER(NAME) uint8_t NAME + +struct drivers_i2c_sx9324_config { + /* Device Description */ + const char *desc; + + /* ACPI _UID */ + unsigned int uid; + + /* Bus speed in Hz, default is I2C_SPEED_FAST */ + enum i2c_speed speed; + + /* Use GPIO-based interrupt instead of IO-APIC */ + struct acpi_gpio irq_gpio; + + /* IO-APIC interrupt */ + struct acpi_irq irq; +#include "registers.h" +}; + +#undef REGISTER + +#endif /* __DRIVERS_I2C_SX9324_CHIP_H__ */ diff --git a/src/drivers/i2c/sx9324/registers.h b/src/drivers/i2c/sx9324/registers.h new file mode 100644 index 0000000000..160e5e7b05 --- /dev/null +++ b/src/drivers/i2c/sx9324/registers.h @@ -0,0 +1,50 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef REGISTER +#error "define REGISTER(NAME) before including this file" +#endif + +REGISTER(reg_gnrl_ctrl0); +REGISTER(reg_gnrl_ctrl1); + +REGISTER(reg_afe_ctrl0); +REGISTER(reg_afe_ctrl1); +REGISTER(reg_afe_ctrl2); +REGISTER(reg_afe_ctrl3); +REGISTER(reg_afe_ctrl4); +REGISTER(reg_afe_ctrl5); +REGISTER(reg_afe_ctrl6); +REGISTER(reg_afe_ctrl7); +REGISTER(reg_afe_ctrl8); +REGISTER(reg_afe_ctrl9); + +REGISTER(reg_prox_ctrl0); +REGISTER(reg_prox_ctrl1); +REGISTER(reg_prox_ctrl2); +REGISTER(reg_prox_ctrl3); +REGISTER(reg_prox_ctrl4); +REGISTER(reg_prox_ctrl5); +REGISTER(reg_prox_ctrl6); +REGISTER(reg_prox_ctrl7); + +REGISTER(reg_adv_ctrl0); +REGISTER(reg_adv_ctrl1); +REGISTER(reg_adv_ctrl2); +REGISTER(reg_adv_ctrl3); +REGISTER(reg_adv_ctrl4); +REGISTER(reg_adv_ctrl5); +REGISTER(reg_adv_ctrl6); +REGISTER(reg_adv_ctrl7); +REGISTER(reg_adv_ctrl8); +REGISTER(reg_adv_ctrl9); +REGISTER(reg_adv_ctrl10); +REGISTER(reg_adv_ctrl11); +REGISTER(reg_adv_ctrl12); +REGISTER(reg_adv_ctrl13); +REGISTER(reg_adv_ctrl14); +REGISTER(reg_adv_ctrl15); +REGISTER(reg_adv_ctrl16); +REGISTER(reg_adv_ctrl17); +REGISTER(reg_adv_ctrl18); +REGISTER(reg_adv_ctrl19); +REGISTER(reg_adv_ctrl20); diff --git a/src/drivers/i2c/sx9324/sx9324.c b/src/drivers/i2c/sx9324/sx9324.c new file mode 100644 index 0000000000..2ca9f36345 --- /dev/null +++ b/src/drivers/i2c/sx9324/sx9324.c @@ -0,0 +1,104 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include +#include +#include +#include +#include +#include +#include +#include "chip.h" + +#define I2C_SX9324_ACPI_ID "STH9324" +#define I2C_SX9324_CHIP_NAME "Semtech SX9324" + +#define REGISTER(NAME) acpi_dp_add_integer(dsd, \ + I2C_SX9324_ACPI_ID "," #NAME, \ + config->NAME) + +static void i2c_sx9324_fill_ssdt(const struct device *dev) +{ + struct drivers_i2c_sx9324_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 *dsd; + + if (!scope || !config) + return; + + if (config->speed) + i2c.speed = config->speed; + + /* Device */ + acpigen_write_scope(scope); + acpigen_write_device(acpi_device_name(dev)); + acpigen_write_name_string("_HID", I2C_SX9324_ACPI_ID); + 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); + + if (config->irq_gpio.pin_count) + acpi_device_write_gpio(&config->irq_gpio); + else + acpi_device_write_interrupt(&config->irq); + + acpigen_write_resourcetemplate_footer(); + + /* DSD */ + dsd = acpi_dp_new_table("_DSD"); +#include "registers.h" + acpi_dp_write(dsd); + + acpigen_pop_len(); /* Device */ + acpigen_pop_len(); /* Scope */ + + printk(BIOS_INFO, "%s: %s at %s\n", acpi_device_path(dev), + config->desc ? : dev->chip_ops->name, dev_path(dev)); +} + +#undef REGISTER + +static const char *i2c_sx9324_acpi_name(const struct device *dev) +{ + static char name[5]; + + snprintf(name, sizeof(name), "SX%02.2X", dev->path.i2c.device); + return name; +} + +static struct device_operations i2c_sx9324_ops = { + .read_resources = noop_read_resources, + .set_resources = noop_set_resources, + .acpi_name = i2c_sx9324_acpi_name, + .acpi_fill_ssdt = i2c_sx9324_fill_ssdt, +}; + +static void i2c_sx9324_enable(struct device *dev) +{ + struct drivers_i2c_sx9324_config *config = dev->chip_info; + + if (!config) { + dev->enabled = 0; + return; + } + + dev->ops = &i2c_sx9324_ops; + + if (config->desc) + dev->name = config->desc; +} + +struct chip_operations drivers_i2c_sx9324_ops = { + CHIP_NAME(I2C_SX9324_CHIP_NAME) + .enable_dev = i2c_sx9324_enable +}; -- cgit v1.2.3