Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | * |
Kristen Accardi | 8cf4c19 | 2005-08-16 15:16:10 -0700 | [diff] [blame] | 26 | * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | * |
| 28 | */ |
| 29 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/module.h> |
| 31 | #include <linux/kernel.h> |
| 32 | #include <linux/types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/pci.h> |
| 34 | #include "../pci.h" |
| 35 | #include "shpchp.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
rajesh.shah@intel.com | 424600f | 2005-10-13 12:05:38 -0700 | [diff] [blame] | 37 | void program_fw_provided_values(struct pci_dev *dev) |
| 38 | { |
| 39 | u16 pci_cmd, pci_bctl; |
| 40 | struct pci_dev *cdev; |
| 41 | struct hotplug_params hpp = {0x8, 0x40, 0, 0}; /* defaults */ |
| 42 | |
| 43 | /* Program hpp values for this device */ |
| 44 | if (!(dev->hdr_type == PCI_HEADER_TYPE_NORMAL || |
| 45 | (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE && |
| 46 | (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI))) |
| 47 | return; |
| 48 | |
| 49 | get_hp_params_from_firmware(dev, &hpp); |
| 50 | |
| 51 | pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, hpp.cache_line_size); |
| 52 | pci_write_config_byte(dev, PCI_LATENCY_TIMER, hpp.latency_timer); |
| 53 | pci_read_config_word(dev, PCI_COMMAND, &pci_cmd); |
| 54 | if (hpp.enable_serr) |
| 55 | pci_cmd |= PCI_COMMAND_SERR; |
| 56 | else |
| 57 | pci_cmd &= ~PCI_COMMAND_SERR; |
| 58 | if (hpp.enable_perr) |
| 59 | pci_cmd |= PCI_COMMAND_PARITY; |
| 60 | else |
| 61 | pci_cmd &= ~PCI_COMMAND_PARITY; |
| 62 | pci_write_config_word(dev, PCI_COMMAND, pci_cmd); |
| 63 | |
| 64 | /* Program bridge control value and child devices */ |
| 65 | if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) { |
| 66 | pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER, |
| 67 | hpp.latency_timer); |
| 68 | pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &pci_bctl); |
| 69 | if (hpp.enable_serr) |
| 70 | pci_bctl |= PCI_BRIDGE_CTL_SERR; |
| 71 | else |
| 72 | pci_bctl &= ~PCI_BRIDGE_CTL_SERR; |
| 73 | if (hpp.enable_perr) |
| 74 | pci_bctl |= PCI_BRIDGE_CTL_PARITY; |
| 75 | else |
| 76 | pci_bctl &= ~PCI_BRIDGE_CTL_PARITY; |
| 77 | pci_write_config_word(dev, PCI_BRIDGE_CONTROL, pci_bctl); |
| 78 | if (dev->subordinate) { |
| 79 | list_for_each_entry(cdev, &dev->subordinate->devices, |
| 80 | bus_list) |
| 81 | program_fw_provided_values(cdev); |
| 82 | } |
| 83 | } |
| 84 | } |
| 85 | |
rajesh.shah@intel.com | dbd7a78 | 2005-10-13 12:05:36 -0700 | [diff] [blame] | 86 | int shpchp_configure_device(struct slot *p_slot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | { |
rajesh.shah@intel.com | dbd7a78 | 2005-10-13 12:05:36 -0700 | [diff] [blame] | 88 | struct pci_dev *dev; |
| 89 | struct pci_bus *parent = p_slot->ctrl->pci_dev->subordinate; |
| 90 | int num, fn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | |
rajesh.shah@intel.com | dbd7a78 | 2005-10-13 12:05:36 -0700 | [diff] [blame] | 92 | dev = pci_find_slot(p_slot->bus, PCI_DEVFN(p_slot->device, 0)); |
| 93 | if (dev) { |
| 94 | err("Device %s already exists at %x:%x, cannot hot-add\n", |
| 95 | pci_name(dev), p_slot->bus, p_slot->device); |
| 96 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | } |
| 98 | |
rajesh.shah@intel.com | dbd7a78 | 2005-10-13 12:05:36 -0700 | [diff] [blame] | 99 | num = pci_scan_slot(parent, PCI_DEVFN(p_slot->device, 0)); |
| 100 | if (num == 0) { |
| 101 | err("No new device found\n"); |
| 102 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | } |
| 104 | |
rajesh.shah@intel.com | dbd7a78 | 2005-10-13 12:05:36 -0700 | [diff] [blame] | 105 | for (fn = 0; fn < 8; fn++) { |
| 106 | if (!(dev = pci_find_slot(p_slot->bus, |
| 107 | PCI_DEVFN(p_slot->device, fn)))) |
| 108 | continue; |
| 109 | if ((dev->class >> 16) == PCI_BASE_CLASS_DISPLAY) { |
| 110 | err("Cannot hot-add display device %s\n", |
| 111 | pci_name(dev)); |
| 112 | continue; |
| 113 | } |
| 114 | if ((dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) || |
| 115 | (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)) { |
| 116 | /* Find an unused bus number for the new bridge */ |
| 117 | struct pci_bus *child; |
| 118 | unsigned char busnr, start = parent->secondary; |
| 119 | unsigned char end = parent->subordinate; |
| 120 | for (busnr = start; busnr <= end; busnr++) { |
| 121 | if (!pci_find_bus(pci_domain_nr(parent), |
| 122 | busnr)) |
| 123 | break; |
| 124 | } |
| 125 | if (busnr >= end) { |
| 126 | err("No free bus for hot-added bridge\n"); |
| 127 | continue; |
| 128 | } |
| 129 | child = pci_add_new_bus(parent, dev, busnr); |
| 130 | if (!child) { |
| 131 | err("Cannot add new bus for %s\n", |
| 132 | pci_name(dev)); |
| 133 | continue; |
| 134 | } |
| 135 | child->subordinate = pci_do_scan_bus(child); |
| 136 | pci_bus_size_bridges(child); |
| 137 | } |
rajesh.shah@intel.com | 424600f | 2005-10-13 12:05:38 -0700 | [diff] [blame] | 138 | program_fw_provided_values(dev); |
rajesh.shah@intel.com | dbd7a78 | 2005-10-13 12:05:36 -0700 | [diff] [blame] | 139 | } |
| 140 | |
| 141 | pci_bus_assign_resources(parent); |
| 142 | pci_bus_add_devices(parent); |
| 143 | pci_enable_bridges(parent); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | return 0; |
| 145 | } |
| 146 | |
rajesh.shah@intel.com | 2178bfa | 2005-10-13 12:05:41 -0700 | [diff] [blame] | 147 | int shpchp_unconfigure_device(struct slot *p_slot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | { |
| 149 | int rc = 0; |
| 150 | int j; |
rajesh.shah@intel.com | 2178bfa | 2005-10-13 12:05:41 -0700 | [diff] [blame] | 151 | u8 bctl = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | |
rajesh.shah@intel.com | 2178bfa | 2005-10-13 12:05:41 -0700 | [diff] [blame] | 153 | dbg("%s: bus/dev = %x/%x\n", __FUNCTION__, p_slot->bus, p_slot->device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | |
| 155 | for (j=0; j<8 ; j++) { |
rajesh.shah@intel.com | 2178bfa | 2005-10-13 12:05:41 -0700 | [diff] [blame] | 156 | struct pci_dev* temp = pci_find_slot(p_slot->bus, |
| 157 | (p_slot->device << 3) | j); |
| 158 | if (!temp) |
| 159 | continue; |
| 160 | if ((temp->class >> 16) == PCI_BASE_CLASS_DISPLAY) { |
| 161 | err("Cannot remove display device %s\n", |
| 162 | pci_name(temp)); |
| 163 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | } |
rajesh.shah@intel.com | 2178bfa | 2005-10-13 12:05:41 -0700 | [diff] [blame] | 165 | if (temp->hdr_type == PCI_HEADER_TYPE_BRIDGE) { |
| 166 | pci_read_config_byte(temp, PCI_BRIDGE_CONTROL, &bctl); |
| 167 | if (bctl & PCI_BRIDGE_CTL_VGA) { |
| 168 | err("Cannot remove display device %s\n", |
| 169 | pci_name(temp)); |
| 170 | continue; |
| 171 | } |
| 172 | } |
| 173 | pci_remove_bus_device(temp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | } |
| 175 | return rc; |
| 176 | } |
| 177 | |