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1da177e4 LT |
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 | * | |
8cf4c195 | 26 | * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com> |
1da177e4 LT |
27 | * |
28 | */ | |
29 | ||
1da177e4 LT |
30 | #include <linux/module.h> |
31 | #include <linux/kernel.h> | |
32 | #include <linux/types.h> | |
1da177e4 LT |
33 | #include <linux/pci.h> |
34 | #include "../pci.h" | |
35 | #include "shpchp.h" | |
1da177e4 | 36 | |
48b19148 | 37 | static void program_fw_provided_values(struct pci_dev *dev) |
424600f9 RS |
38 | { |
39 | u16 pci_cmd, pci_bctl; | |
40 | struct pci_dev *cdev; | |
783c49fc | 41 | struct hotplug_params hpp; |
424600f9 RS |
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 | ||
783c49fc | 49 | /* use default values if we can't get them from firmware */ |
e22b7350 KK |
50 | if (get_hp_params_from_firmware(dev, &hpp) || |
51 | !hpp.t0 || (hpp.t0->revision > 1)) { | |
be7bce25 | 52 | warn("Could not get hotplug parameters. Use defaults\n"); |
e22b7350 KK |
53 | hpp.t0 = &hpp.type0_data; |
54 | hpp.t0->revision = 0; | |
55 | hpp.t0->cache_line_size = 8; | |
56 | hpp.t0->latency_timer = 0x40; | |
57 | hpp.t0->enable_serr = 0; | |
58 | hpp.t0->enable_perr = 0; | |
783c49fc | 59 | } |
424600f9 | 60 | |
e22b7350 KK |
61 | pci_write_config_byte(dev, |
62 | PCI_CACHE_LINE_SIZE, hpp.t0->cache_line_size); | |
63 | pci_write_config_byte(dev, PCI_LATENCY_TIMER, hpp.t0->latency_timer); | |
424600f9 | 64 | pci_read_config_word(dev, PCI_COMMAND, &pci_cmd); |
e22b7350 | 65 | if (hpp.t0->enable_serr) |
424600f9 RS |
66 | pci_cmd |= PCI_COMMAND_SERR; |
67 | else | |
68 | pci_cmd &= ~PCI_COMMAND_SERR; | |
e22b7350 | 69 | if (hpp.t0->enable_perr) |
424600f9 RS |
70 | pci_cmd |= PCI_COMMAND_PARITY; |
71 | else | |
72 | pci_cmd &= ~PCI_COMMAND_PARITY; | |
73 | pci_write_config_word(dev, PCI_COMMAND, pci_cmd); | |
74 | ||
75 | /* Program bridge control value and child devices */ | |
76 | if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) { | |
77 | pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER, | |
e22b7350 | 78 | hpp.t0->latency_timer); |
424600f9 | 79 | pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &pci_bctl); |
e22b7350 | 80 | if (hpp.t0->enable_serr) |
424600f9 RS |
81 | pci_bctl |= PCI_BRIDGE_CTL_SERR; |
82 | else | |
83 | pci_bctl &= ~PCI_BRIDGE_CTL_SERR; | |
e22b7350 | 84 | if (hpp.t0->enable_perr) |
424600f9 RS |
85 | pci_bctl |= PCI_BRIDGE_CTL_PARITY; |
86 | else | |
87 | pci_bctl &= ~PCI_BRIDGE_CTL_PARITY; | |
88 | pci_write_config_word(dev, PCI_BRIDGE_CONTROL, pci_bctl); | |
89 | if (dev->subordinate) { | |
90 | list_for_each_entry(cdev, &dev->subordinate->devices, | |
91 | bus_list) | |
92 | program_fw_provided_values(cdev); | |
93 | } | |
94 | } | |
95 | } | |
96 | ||
0ab2b57f | 97 | int __ref shpchp_configure_device(struct slot *p_slot) |
1da177e4 | 98 | { |
dbd7a788 RS |
99 | struct pci_dev *dev; |
100 | struct pci_bus *parent = p_slot->ctrl->pci_dev->subordinate; | |
101 | int num, fn; | |
f98ca311 | 102 | struct controller *ctrl = p_slot->ctrl; |
dbd7a788 | 103 | |
e00e57ef | 104 | dev = pci_get_slot(parent, PCI_DEVFN(p_slot->device, 0)); |
dbd7a788 | 105 | if (dev) { |
be7bce25 TI |
106 | ctrl_err(ctrl, "Device %s already exists " |
107 | "at %04x:%02x:%02x, cannot hot-add\n", pci_name(dev), | |
108 | pci_domain_nr(parent), p_slot->bus, p_slot->device); | |
e00e57ef | 109 | pci_dev_put(dev); |
dbd7a788 | 110 | return -EINVAL; |
1da177e4 LT |
111 | } |
112 | ||
dbd7a788 RS |
113 | num = pci_scan_slot(parent, PCI_DEVFN(p_slot->device, 0)); |
114 | if (num == 0) { | |
f98ca311 | 115 | ctrl_err(ctrl, "No new device found\n"); |
dbd7a788 RS |
116 | return -ENODEV; |
117 | } | |
1da177e4 | 118 | |
dbd7a788 | 119 | for (fn = 0; fn < 8; fn++) { |
e00e57ef KK |
120 | dev = pci_get_slot(parent, PCI_DEVFN(p_slot->device, fn)); |
121 | if (!dev) | |
dbd7a788 RS |
122 | continue; |
123 | if ((dev->class >> 16) == PCI_BASE_CLASS_DISPLAY) { | |
f98ca311 TI |
124 | ctrl_err(ctrl, "Cannot hot-add display device %s\n", |
125 | pci_name(dev)); | |
e00e57ef | 126 | pci_dev_put(dev); |
dbd7a788 RS |
127 | continue; |
128 | } | |
129 | if ((dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) || | |
130 | (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)) { | |
131 | /* Find an unused bus number for the new bridge */ | |
132 | struct pci_bus *child; | |
133 | unsigned char busnr, start = parent->secondary; | |
134 | unsigned char end = parent->subordinate; | |
135 | for (busnr = start; busnr <= end; busnr++) { | |
136 | if (!pci_find_bus(pci_domain_nr(parent), | |
137 | busnr)) | |
138 | break; | |
139 | } | |
35e1801e | 140 | if (busnr > end) { |
f98ca311 TI |
141 | ctrl_err(ctrl, |
142 | "No free bus for hot-added bridge\n"); | |
e00e57ef | 143 | pci_dev_put(dev); |
dbd7a788 RS |
144 | continue; |
145 | } | |
146 | child = pci_add_new_bus(parent, dev, busnr); | |
147 | if (!child) { | |
f98ca311 TI |
148 | ctrl_err(ctrl, "Cannot add new bus for %s\n", |
149 | pci_name(dev)); | |
e00e57ef | 150 | pci_dev_put(dev); |
dbd7a788 RS |
151 | continue; |
152 | } | |
153 | child->subordinate = pci_do_scan_bus(child); | |
154 | pci_bus_size_bridges(child); | |
155 | } | |
424600f9 | 156 | program_fw_provided_values(dev); |
e00e57ef | 157 | pci_dev_put(dev); |
1da177e4 LT |
158 | } |
159 | ||
dbd7a788 RS |
160 | pci_bus_assign_resources(parent); |
161 | pci_bus_add_devices(parent); | |
162 | pci_enable_bridges(parent); | |
1da177e4 LT |
163 | return 0; |
164 | } | |
165 | ||
2178bfad | 166 | int shpchp_unconfigure_device(struct slot *p_slot) |
1da177e4 LT |
167 | { |
168 | int rc = 0; | |
169 | int j; | |
2178bfad | 170 | u8 bctl = 0; |
e00e57ef | 171 | struct pci_bus *parent = p_slot->ctrl->pci_dev->subordinate; |
f98ca311 | 172 | struct controller *ctrl = p_slot->ctrl; |
e00e57ef | 173 | |
be7bce25 TI |
174 | ctrl_dbg(ctrl, "%s: domain:bus:dev = %04x:%02x:%02x\n", |
175 | __func__, pci_domain_nr(parent), p_slot->bus, p_slot->device); | |
1da177e4 LT |
176 | |
177 | for (j=0; j<8 ; j++) { | |
e00e57ef | 178 | struct pci_dev* temp = pci_get_slot(parent, |
2178bfad RS |
179 | (p_slot->device << 3) | j); |
180 | if (!temp) | |
181 | continue; | |
182 | if ((temp->class >> 16) == PCI_BASE_CLASS_DISPLAY) { | |
f98ca311 TI |
183 | ctrl_err(ctrl, "Cannot remove display device %s\n", |
184 | pci_name(temp)); | |
e00e57ef | 185 | pci_dev_put(temp); |
2178bfad RS |
186 | continue; |
187 | } | |
188 | if (temp->hdr_type == PCI_HEADER_TYPE_BRIDGE) { | |
189 | pci_read_config_byte(temp, PCI_BRIDGE_CONTROL, &bctl); | |
190 | if (bctl & PCI_BRIDGE_CTL_VGA) { | |
f98ca311 TI |
191 | ctrl_err(ctrl, |
192 | "Cannot remove display device %s\n", | |
193 | pci_name(temp)); | |
e00e57ef | 194 | pci_dev_put(temp); |
2178bfad RS |
195 | continue; |
196 | } | |
1da177e4 | 197 | } |
2178bfad | 198 | pci_remove_bus_device(temp); |
e00e57ef | 199 | pci_dev_put(temp); |
1da177e4 LT |
200 | } |
201 | return rc; | |
202 | } | |
203 |