diff options
| -rw-r--r-- | src/drivers/generic/generic/Kconfig | 1 | ||||
| -rw-r--r-- | src/drivers/generic/generic/Makefile.inc | 2 | ||||
| -rw-r--r-- | src/drivers/generic/generic/chip.h | 48 | ||||
| -rw-r--r-- | src/drivers/generic/generic/generic.c | 98 |
4 files changed, 148 insertions, 1 deletions
diff --git a/src/drivers/generic/generic/Kconfig b/src/drivers/generic/generic/Kconfig index 864b878e9a..7b16b623df 100644 --- a/src/drivers/generic/generic/Kconfig +++ b/src/drivers/generic/generic/Kconfig @@ -1,2 +1,3 @@ config DRIVERS_GENERIC_GENERIC bool + depends on HAVE_ACPI_TABLES diff --git a/src/drivers/generic/generic/Makefile.inc b/src/drivers/generic/generic/Makefile.inc index b7db25411d..37a873b117 100644 --- a/src/drivers/generic/generic/Makefile.inc +++ b/src/drivers/generic/generic/Makefile.inc @@ -1 +1 @@ -# Empty +ramstage-$(CONFIG_DRIVERS_GENERIC_GENERIC) += generic.c diff --git a/src/drivers/generic/generic/chip.h b/src/drivers/generic/generic/chip.h new file mode 100644 index 0000000000..f3c54b687b --- /dev/null +++ b/src/drivers/generic/generic/chip.h @@ -0,0 +1,48 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2018 Google LLC. + * + * 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. + */ + +#ifndef __GENERIC_GENERIC_CHIP_H__ +#define __GENERIC_GENERIC_CHIP_H__ + +#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES) + +#include <arch/acpi_device.h> + +#define MAX_GENERIC_PROPERTY_LIST 10 + +struct drivers_generic_generic_config { + const char *hid; /* ACPI _HID (required) */ + const char *cid; /* ACPI _CID */ + const char *name; /* ACPI Device Name */ + /* + * Autogenerated ACPI Device Name if name is not provided in + * devicetree. + */ + char autogen_name[5]; + const char *desc; /* ACPI _DDN */ + unsigned int uid; /* ACPI _UID */ + + /* Generic properties for exporting device-specific data to the OS */ + struct acpi_dp property_list[MAX_GENERIC_PROPERTY_LIST]; + int property_count; +}; + +#else /* CONFIG_HAVE_ACPI_TABLES */ + +struct drivers_generic_generic_config { }; + +#endif /* !CONFIG_HAVE_ACPI_TABLES */ + +#endif /* __GENERIC_GENERIC_CHIP_H__ */ diff --git a/src/drivers/generic/generic/generic.c b/src/drivers/generic/generic/generic.c new file mode 100644 index 0000000000..37fbab5c61 --- /dev/null +++ b/src/drivers/generic/generic/generic.c @@ -0,0 +1,98 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2018 Google LLC + * + * 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_device.h> +#include <arch/acpigen.h> +#include <console/console.h> +#include <device/device.h> +#include <device/path.h> +#include <stdint.h> +#include <string.h> +#include "chip.h" + +static void generic_dev_fill_ssdt_generator(struct device *dev) +{ + struct acpi_dp *dsd; + struct drivers_generic_generic_config *config = dev->chip_info; + + if (!dev->enabled || !config) + return; + + if (!config->hid) { + printk(BIOS_ERR, "%s: ERROR: _HID required\n", dev_path(dev)); + return; + } + + acpigen_write_scope(acpi_device_scope(dev)); + acpigen_write_device(acpi_device_name(dev)); + acpigen_write_name_string("_HID", config->hid); + if (config->cid) + acpigen_write_name_string("_CID", config->cid); + acpigen_write_name_integer("_UID", config->uid); + acpigen_write_name_string("_DDN", config->desc); + acpigen_write_STA(acpi_device_status(dev)); + + dsd = acpi_dp_new_table("_DSD"); + acpi_dp_add_property_list(dsd, config->property_list, + config->property_count); + 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)); +} + +static char *generic_autogen_name(struct drivers_generic_generic_config *config) +{ + char *name = &config->autogen_name[0]; + static unsigned int id; + + if (name[0] != '\0') + return name; + + snprintf(name, sizeof(name), "G%03.3X", id++); + name[4] = '\0'; + return name; +} + +static const char *generic_dev_acpi_name(const struct device *dev) +{ + struct drivers_generic_generic_config *config = dev->chip_info; + + if (config->name) + return config->name; + + return generic_autogen_name(config); +} + +static struct device_operations generic_dev_ops = { + .read_resources = DEVICE_NOOP, + .set_resources = DEVICE_NOOP, + .enable_resources = DEVICE_NOOP, + .acpi_name = &generic_dev_acpi_name, + .acpi_fill_ssdt_generator = &generic_dev_fill_ssdt_generator, +}; + +static void generic_dev_enable(struct device *dev) +{ + dev->ops = &generic_dev_ops; +} + +struct chip_operations drivers_generic_generic_ops = { + CHIP_NAME("Generic Device") + .enable_dev = &generic_dev_enable +}; |