1 /* 2 * Standard Hot Plug Controller Driver 3 * 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 8 * 9 * All rights reserved. 10 * 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. 15 * 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 20 * details. 21 * 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. 25 * 26 * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com> 27 * 28 */ 29 30 #include <linux/module.h> 31 #include <linux/kernel.h> 32 #include <linux/types.h> 33 #include <linux/pci.h> 34 #include "../pci.h" 35 #include "shpchp.h" 36 37 int __ref shpchp_configure_device(struct slot *p_slot) 38 { 39 struct pci_dev *dev; 40 struct controller *ctrl = p_slot->ctrl; 41 struct pci_dev *bridge = ctrl->pci_dev; 42 struct pci_bus *parent = bridge->subordinate; 43 int num, fn; 44 45 dev = pci_get_slot(parent, PCI_DEVFN(p_slot->device, 0)); 46 if (dev) { 47 ctrl_err(ctrl, "Device %s already exists " 48 "at %04x:%02x:%02x, cannot hot-add\n", pci_name(dev), 49 pci_domain_nr(parent), p_slot->bus, p_slot->device); 50 pci_dev_put(dev); 51 return -EINVAL; 52 } 53 54 num = pci_scan_slot(parent, PCI_DEVFN(p_slot->device, 0)); 55 if (num == 0) { 56 ctrl_err(ctrl, "No new device found\n"); 57 return -ENODEV; 58 } 59 60 for (fn = 0; fn < 8; fn++) { 61 dev = pci_get_slot(parent, PCI_DEVFN(p_slot->device, fn)); 62 if (!dev) 63 continue; 64 if ((dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) || 65 (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)) 66 pci_hp_add_bridge(dev); 67 pci_dev_put(dev); 68 } 69 70 pci_assign_unassigned_bridge_resources(bridge); 71 72 for (fn = 0; fn < 8; fn++) { 73 dev = pci_get_slot(parent, PCI_DEVFN(p_slot->device, fn)); 74 if (!dev) 75 continue; 76 pci_configure_slot(dev); 77 pci_dev_put(dev); 78 } 79 80 pci_bus_add_devices(parent); 81 82 return 0; 83 } 84 85 int shpchp_unconfigure_device(struct slot *p_slot) 86 { 87 int rc = 0; 88 int j; 89 u8 bctl = 0; 90 struct pci_bus *parent = p_slot->ctrl->pci_dev->subordinate; 91 struct controller *ctrl = p_slot->ctrl; 92 93 ctrl_dbg(ctrl, "%s: domain:bus:dev = %04x:%02x:%02x\n", 94 __func__, pci_domain_nr(parent), p_slot->bus, p_slot->device); 95 96 for (j = 0; j < 8 ; j++) { 97 struct pci_dev *temp = pci_get_slot(parent, 98 (p_slot->device << 3) | j); 99 if (!temp) 100 continue; 101 if (temp->hdr_type == PCI_HEADER_TYPE_BRIDGE) { 102 pci_read_config_byte(temp, PCI_BRIDGE_CONTROL, &bctl); 103 if (bctl & PCI_BRIDGE_CTL_VGA) { 104 ctrl_err(ctrl, 105 "Cannot remove display device %s\n", 106 pci_name(temp)); 107 pci_dev_put(temp); 108 rc = -EINVAL; 109 break; 110 } 111 } 112 pci_stop_and_remove_bus_device(temp); 113 pci_dev_put(temp); 114 } 115 return rc; 116 } 117 118