ish.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <acpi/acpi_device.h>
#include <acpi/acpigen.h>
#include <console/console.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include "chip.h"
 
static void ish_fill_ssdt_generator(const struct device *dev)
{
        struct drivers_intel_ish_config *config = dev->chip_info;
        struct device *root = dev->bus->dev;
        struct acpi_dp *dsd;
 
        if (!config || !config->firmware_name)
                return;
 
        acpigen_write_scope(acpi_device_path(root));
 
        dsd = acpi_dp_new_table("_DSD");
        acpi_dp_add_string(dsd, "firmware-name", config->firmware_name);
        acpi_dp_write(dsd);
 
        acpigen_pop_len();      /* Scope */
 
        printk(BIOS_INFO, "%s: Set firmware-name: %s\n",
               acpi_device_path(root), config->firmware_name);
}
 
static struct device_operations intel_ish_ops = {
        .read_resources         = noop_read_resources,
        .set_resources          = noop_set_resources,
        .acpi_fill_ssdt         = ish_fill_ssdt_generator,
};
 
static void intel_ish_enable(struct device *dev)
{
        /* This dev is a generic device that is a child to the ISH PCI device */
        dev->ops = &intel_ish_ops;
}
 
/* Copy of default_pci_ops_dev with scan_bus addition */
static const struct device_operations pci_ish_device_ops = {
        .read_resources   = pci_dev_read_resources,
        .set_resources    = pci_dev_set_resources,
        .enable_resources = pci_dev_enable_resources,
        .init             = pci_dev_init,
        .scan_bus         = &scan_generic_bus, /* Non-default */
        .ops_pci          = &pci_dev_ops_pci,
};
 
static const unsigned short pci_device_ids[] = {
        PCI_DID_INTEL_MTL_ISHB,
        PCI_DID_INTEL_CNL_ISHB,
        PCI_DID_INTEL_CML_ISHB,
        PCI_DID_INTEL_TGL_ISHB,
        PCI_DID_INTEL_TGL_H_ISHB,
        0
};
 
static const struct pci_driver ish_intel_driver __pci_driver = {
        .ops            = &pci_ish_device_ops,
        .vendor         = PCI_VID_INTEL,
        .devices        = pci_device_ids,
};
 
struct chip_operations drivers_intel_ish_ops = {
        CHIP_NAME("Intel ISH Chip")
        .enable_dev     = intel_ish_enable,
};