linux-imx

// SPDX-License-Identifier: GPL-2.0+

/*

 * ipmi_si_pci.c

 *

 * Handling for IPMI devices on the PCI bus.

 */

​

#define pr_fmt(fmt) "ipmi_pci: " fmt

​

#include <linux/module.h>

#include <linux/pci.h>

#include "ipmi_si.h"

​

static bool pci_registered;

​

static bool si_trypci = true;

​

module_param_named(trypci, si_trypci, bool, 0);

MODULE_PARM_DESC(trypci, "Setting this to zero will disable the"

         " default scan of the interfaces identified via pci");

​

#define PCI_DEVICE_ID_HP_MMC 0x121A

​

static void ipmi_pci_cleanup(struct si_sm_io *io)

{

    struct pci_dev *pdev = io->addr_source_data;

​

    pci_disable_device(pdev);

}

​

static int ipmi_pci_probe_regspacing(struct si_sm_io *io)

{

    if (io->si_type == SI_KCS) {

        unsigned char   status;

        int     regspacing;

​

        io->regsize = DEFAULT_REGSIZE;

        io->regshift = 0;

​

        /* detect 1, 4, 16byte spacing */

        for (regspacing = DEFAULT_REGSPACING; regspacing <= 16;) {

            io->regspacing = regspacing;

            if (io->io_setup(io)) {

                dev_err(io->dev, "Could not setup I/O space\n");

                return DEFAULT_REGSPACING;

            }

            /* write invalid cmd */

            io->outputb(io, 1, 0x10);

            /* read status back */

            status = io->inputb(io, 1);

            io->io_cleanup(io);

            if (status)

                return regspacing;

            regspacing *= 4;

        }

    }

    return DEFAULT_REGSPACING;

}

​

static struct pci_device_id ipmi_pci_blacklist[] = {

    /*

     * This is a "Virtual IPMI device", whatever that is.  It appears

     * as a KCS device by the class, but it is not one.