2 * Standard Hot Plug Controller Driver
4 * Copyright (C) 1995,2001 Compaq Computer Corporation
5 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
6 * Copyright (C) 2001 IBM Corp.
7 * Copyright (C) 2003-2004 Intel Corporation
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or (at
14 * your option) any later version.
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
19 * NON INFRINGEMENT. See the GNU General Public License for more
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
30 #include <linux/module.h>
31 #include <linux/kernel.h>
32 #include <linux/types.h>
33 #include <linux/pci.h>
37 int __ref shpchp_configure_device(struct slot *p_slot)
40 struct pci_bus *parent = p_slot->ctrl->pci_dev->subordinate;
42 struct controller *ctrl = p_slot->ctrl;
44 dev = pci_get_slot(parent, PCI_DEVFN(p_slot->device, 0));
46 ctrl_err(ctrl, "Device %s already exists "
47 "at %04x:%02x:%02x, cannot hot-add\n", pci_name(dev),
48 pci_domain_nr(parent), p_slot->bus, p_slot->device);
53 num = pci_scan_slot(parent, PCI_DEVFN(p_slot->device, 0));
55 ctrl_err(ctrl, "No new device found\n");
59 for (fn = 0; fn < 8; fn++) {
60 dev = pci_get_slot(parent, PCI_DEVFN(p_slot->device, fn));
63 if ((dev->class >> 16) == PCI_BASE_CLASS_DISPLAY) {
64 ctrl_err(ctrl, "Cannot hot-add display device %s\n",
69 if ((dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) ||
70 (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)) {
71 /* Find an unused bus number for the new bridge */
72 struct pci_bus *child;
73 unsigned char busnr, start = parent->secondary;
74 unsigned char end = parent->subordinate;
75 for (busnr = start; busnr <= end; busnr++) {
76 if (!pci_find_bus(pci_domain_nr(parent),
82 "No free bus for hot-added bridge\n");
86 child = pci_add_new_bus(parent, dev, busnr);
88 ctrl_err(ctrl, "Cannot add new bus for %s\n",
93 child->subordinate = pci_do_scan_bus(child);
94 pci_bus_size_bridges(child);
96 pci_configure_slot(dev);
100 pci_bus_assign_resources(parent);
101 pci_bus_add_devices(parent);
102 pci_enable_bridges(parent);
106 int shpchp_unconfigure_device(struct slot *p_slot)
111 struct pci_bus *parent = p_slot->ctrl->pci_dev->subordinate;
112 struct controller *ctrl = p_slot->ctrl;
114 ctrl_dbg(ctrl, "%s: domain:bus:dev = %04x:%02x:%02x\n",
115 __func__, pci_domain_nr(parent), p_slot->bus, p_slot->device);
117 for (j=0; j<8 ; j++) {
118 struct pci_dev* temp = pci_get_slot(parent,
119 (p_slot->device << 3) | j);
122 if ((temp->class >> 16) == PCI_BASE_CLASS_DISPLAY) {
123 ctrl_err(ctrl, "Cannot remove display device %s\n",
128 if (temp->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
129 pci_read_config_byte(temp, PCI_BRIDGE_CONTROL, &bctl);
130 if (bctl & PCI_BRIDGE_CTL_VGA) {
132 "Cannot remove display device %s\n",
138 pci_remove_bus_device(temp);