src/southbridge/intel/i82801ex/smbus.c

#include <device/device.h>
#include <device/path.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <device/smbus.h>
#include <arch/io.h>
#include "i82801ex.h"
#include "smbus.h"

static int lsmbus_read_byte(device_t dev, u8 address)
{
	u16 device;
	struct resource *res;
	struct bus *pbus;

	device = dev->path.i2c.device;
	pbus = get_pbus_smbus(dev);
	res = find_resource(pbus->dev, 0x20);

	return do_smbus_read_byte(res->base, device, address);
}

static struct smbus_bus_operations lops_smbus_bus = {
	.read_byte  = lsmbus_read_byte,
};

static struct pci_operations lops_pci = {
	/* The subsystem id follows the ide controller */
	.set_subsystem = 0,
};

static struct device_operations smbus_ops = {
	.read_resources   = pci_dev_read_resources,
	.set_resources    = pci_dev_set_resources,
	.enable_resources = pci_dev_enable_resources,
	.init             = 0,
	.scan_bus         = scan_smbus,
	.enable           = i82801ex_enable,
	.ops_pci          = &lops_pci,
	.ops_smbus_bus    = &lops_smbus_bus,
};

static const struct pci_driver smbus_driver __pci_driver = {
	.ops    = &smbus_ops,
	.vendor = PCI_VENDOR_ID_INTEL,
	.device = PCI_DEVICE_ID_INTEL_82801ER_SMB,
};