linux-imx

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

/*

 * IBM Hot Plug Controller Driver

 *

 * Written By: Irene Zubarev, IBM Corporation

 *

 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)

 * Copyright (C) 2001,2002 IBM Corp.

 *

 * All rights reserved.

 *

 * Send feedback to <gregkh@us.ibm.com>

 *

 */

​

#include <linux/module.h>

#include <linux/slab.h>

#include <linux/pci.h>

#include <linux/list.h>

#include "ibmphp.h"

​

​

static int configure_device(struct pci_func *);

static int configure_bridge(struct pci_func **, u8);

static struct res_needed *scan_behind_bridge(struct pci_func *, u8);

static int add_new_bus(struct bus_node *, struct resource_node *, struct resource_node *, struct resource_node *, u8);

static u8 find_sec_number(u8 primary_busno, u8 slotno);

​

/*

 * NOTE..... If BIOS doesn't provide default routing, we assign:

 * 9 for SCSI, 10 for LAN adapters, and 11 for everything else.

 * If adapter is bridged, then we assign 11 to it and devices behind it.

 * We also assign the same irq numbers for multi function devices.

 * These are PIC mode, so shouldn't matter n.e.ways (hopefully)

 */

static void assign_alt_irq(struct pci_func *cur_func, u8 class_code)

{

    int j;

    for (j = 0; j < 4; j++) {

        if (cur_func->irq[j] == 0xff) {

            switch (class_code) {

                case PCI_BASE_CLASS_STORAGE:

                    cur_func->irq[j] = SCSI_IRQ;

                    break;

                case PCI_BASE_CLASS_NETWORK:

                    cur_func->irq[j] = LAN_IRQ;

                    break;

                default:

                    cur_func->irq[j] = OTHER_IRQ;

                    break;

            }

        }

    }

}

​

/*

 * Configures the device to be added (will allocate needed resources if it

 * can), the device can be a bridge or a regular pci device, can also be

 * multi-functional

 *

 * Input: function to be added

 *

 * TO DO:  The error case with Multifunction device or multi function bridge,

 * if there is an error, will need to go through all previous functions and

 * unconfigure....or can add some code into unconfigure_card....

 */

int ibmphp_configure_card(struct pci_func *func, u8 slotno)

{

    u16 vendor_id;

    u32 class;

    u8 class_code;

    u8 hdr_type, device, sec_number;

    u8 function;

    struct pci_func *newfunc;   /* for multi devices */

    struct pci_func *cur_func, *prev_func;

    int rc, i, j;

    int cleanup_count;

    u8 flag;

    u8 valid_device = 0x00; /* to see if we are able to read from card any device info at all */

​

    debug("inside configure_card, func->busno = %x\n", func->busno);

​

    device = func->device;

    cur_func = func;

​

    /* We only get bus and device from IRQ routing table.  So at this point,

     * func->busno is correct, and func->device contains only device (at the 5

     * highest bits)

     */

​

    /* For every function on the card */

    for (function = 0x00; function < 0x08; function++) {