smbus.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <device/device.h>
#include <device/path.h>
#include <device/smbus.h>
#include <device/pci.h>
#include <device/pci_def.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <device/smbus_host.h>
#include <southbridge/intel/common/smbus_ops.h>
#include "pch.h"
 
static void pch_smbus_init(struct device *dev)
{
        struct resource *res;
 
        /* Enable clock gating */
        pci_and_config16(dev, 0x80, ~((1 << 8) | (1 << 10) | (1 << 12) | (1 << 14)));
 
        /* Set Receive Slave Address */
        res = probe_resource(dev, PCI_BASE_ADDRESS_4);
        if (res)
                smbus_set_slave_addr(res->base, SMBUS_SLAVE_ADDR);
}
 
static const char *smbus_acpi_name(const struct device *dev)
{
        return "SBUS";
}
 
static struct device_operations smbus_ops = {
        .read_resources         = smbus_read_resources,
        .set_resources          = pci_dev_set_resources,
        .enable_resources       = pci_dev_enable_resources,
        .scan_bus               = scan_smbus,
        .init                   = pch_smbus_init,
        .ops_smbus_bus          = &lops_smbus_bus,
        .ops_pci                = &pci_dev_ops_pci,
        .acpi_name              = smbus_acpi_name,
};
 
static const unsigned short pci_device_ids[] = { 0x1c22, 0x1e22, 0 };
 
static const struct pci_driver pch_smbus __pci_driver = {
        .ops     = &smbus_ops,
        .vendor  = PCI_VID_INTEL,
        .devices = pci_device_ids,
};