pci.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_def.h>
#include <device/pci_ops.h>
#include <device/pci_ids.h>
#include "i82801gx.h"
 
static void pci_init(struct device *dev)
{
        u16 reg16;
 
        /* Enable Bus Master */
        pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER);
 
        /* This device has no interrupt */
        pci_write_config8(dev, INTR, 0xff);
 
        /* Disable parity error response and SERR */
        pci_and_config16(dev, PCI_BRIDGE_CONTROL,
                         ~(PCI_BRIDGE_CTL_PARITY | PCI_BRIDGE_CTL_SERR));
 
        /* Master Latency Count must be set to 0x04! */
        pci_update_config8(dev, SMLT, 0x07, 0x04 << 3);
 
        /* Clear errors in status registers. FIXME: Do something? */
        reg16 = pci_read_config16(dev, PSTS);
        //reg16 |= 0xf900;
        pci_write_config16(dev, PSTS, reg16);
 
        reg16 = pci_read_config16(dev, SECSTS);
        // reg16 |= 0xf900;
        pci_write_config16(dev, SECSTS, reg16);
}
 
static struct device_operations device_ops = {
        .read_resources         = pci_bus_read_resources,
        .set_resources          = pci_dev_set_resources,
        .enable_resources       = pci_bus_enable_resources,
        .init                   = pci_init,
        .scan_bus               = pci_scan_bridge,
        .ops_pci                = &pci_dev_ops_pci,
};
 
/* Desktop */
/* 82801BA/CA/DB/EB/ER/FB/FR/FW/FRW/GB/GR/GDH/HB/IB/6300ESB/i3100 */
static const struct pci_driver i82801g_pci __pci_driver = {
        .ops    = &device_ops,
        .vendor = PCI_VID_INTEL,
        .device = 0x244e,
};
 
/* Mobile / Ultra Mobile */
/* 82801BAM/CAM/DBL/DBM/FBM/GBM/GHM/GU/HBM/HEM */
static const struct pci_driver i82801gmu_pci __pci_driver = {
        .ops    = &device_ops,
        .vendor = PCI_VID_INTEL,
        .device = 0x2448,
};