11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Standard Hot Plug Controller Driver 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Copyright (C) 1995,2001 Compaq Computer Corporation 51da177e4SLinus Torvalds * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com) 61da177e4SLinus Torvalds * Copyright (C) 2001 IBM Corp. 71da177e4SLinus Torvalds * Copyright (C) 2003-2004 Intel Corporation 81da177e4SLinus Torvalds * 91da177e4SLinus Torvalds * All rights reserved. 101da177e4SLinus Torvalds * 111da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify 121da177e4SLinus Torvalds * it under the terms of the GNU General Public License as published by 131da177e4SLinus Torvalds * the Free Software Foundation; either version 2 of the License, or (at 141da177e4SLinus Torvalds * your option) any later version. 151da177e4SLinus Torvalds * 161da177e4SLinus Torvalds * This program is distributed in the hope that it will be useful, but 171da177e4SLinus Torvalds * WITHOUT ANY WARRANTY; without even the implied warranty of 181da177e4SLinus Torvalds * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or 191da177e4SLinus Torvalds * NON INFRINGEMENT. See the GNU General Public License for more 201da177e4SLinus Torvalds * details. 211da177e4SLinus Torvalds * 221da177e4SLinus Torvalds * You should have received a copy of the GNU General Public License 231da177e4SLinus Torvalds * along with this program; if not, write to the Free Software 241da177e4SLinus Torvalds * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 251da177e4SLinus Torvalds * 268cf4c195SKristen Accardi * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com> 271da177e4SLinus Torvalds * 281da177e4SLinus Torvalds */ 291da177e4SLinus Torvalds 301da177e4SLinus Torvalds #include <linux/module.h> 311da177e4SLinus Torvalds #include <linux/moduleparam.h> 321da177e4SLinus Torvalds #include <linux/kernel.h> 331da177e4SLinus Torvalds #include <linux/types.h> 341da177e4SLinus Torvalds #include <linux/pci.h> 35f7391f53SKenji Kaneshige #include <linux/workqueue.h> 361da177e4SLinus Torvalds #include "shpchp.h" 371da177e4SLinus Torvalds 381da177e4SLinus Torvalds /* Global variables */ 391da177e4SLinus Torvalds int shpchp_debug; 401da177e4SLinus Torvalds int shpchp_poll_mode; 411da177e4SLinus Torvalds int shpchp_poll_time; 42f7391f53SKenji Kaneshige struct workqueue_struct *shpchp_wq; 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds #define DRIVER_VERSION "0.4" 451da177e4SLinus Torvalds #define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>" 461da177e4SLinus Torvalds #define DRIVER_DESC "Standard Hot Plug PCI Controller Driver" 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds MODULE_AUTHOR(DRIVER_AUTHOR); 491da177e4SLinus Torvalds MODULE_DESCRIPTION(DRIVER_DESC); 501da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 511da177e4SLinus Torvalds 521da177e4SLinus Torvalds module_param(shpchp_debug, bool, 0644); 531da177e4SLinus Torvalds module_param(shpchp_poll_mode, bool, 0644); 541da177e4SLinus Torvalds module_param(shpchp_poll_time, int, 0644); 551da177e4SLinus Torvalds MODULE_PARM_DESC(shpchp_debug, "Debugging mode enabled or not"); 561da177e4SLinus Torvalds MODULE_PARM_DESC(shpchp_poll_mode, "Using polling mechanism for hot-plug events or not"); 571da177e4SLinus Torvalds MODULE_PARM_DESC(shpchp_poll_time, "Polling mechanism frequency, in seconds"); 581da177e4SLinus Torvalds 591da177e4SLinus Torvalds #define SHPC_MODULE_NAME "shpchp" 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds static int set_attention_status (struct hotplug_slot *slot, u8 value); 621da177e4SLinus Torvalds static int enable_slot (struct hotplug_slot *slot); 631da177e4SLinus Torvalds static int disable_slot (struct hotplug_slot *slot); 641da177e4SLinus Torvalds static int get_power_status (struct hotplug_slot *slot, u8 *value); 651da177e4SLinus Torvalds static int get_attention_status (struct hotplug_slot *slot, u8 *value); 661da177e4SLinus Torvalds static int get_latch_status (struct hotplug_slot *slot, u8 *value); 671da177e4SLinus Torvalds static int get_adapter_status (struct hotplug_slot *slot, u8 *value); 6881f15442SKenji Kaneshige static int get_address (struct hotplug_slot *slot, u32 *value); 691da177e4SLinus Torvalds static int get_max_bus_speed (struct hotplug_slot *slot, enum pci_bus_speed *value); 701da177e4SLinus Torvalds static int get_cur_bus_speed (struct hotplug_slot *slot, enum pci_bus_speed *value); 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds static struct hotplug_slot_ops shpchp_hotplug_slot_ops = { 731da177e4SLinus Torvalds .owner = THIS_MODULE, 741da177e4SLinus Torvalds .set_attention_status = set_attention_status, 751da177e4SLinus Torvalds .enable_slot = enable_slot, 761da177e4SLinus Torvalds .disable_slot = disable_slot, 771da177e4SLinus Torvalds .get_power_status = get_power_status, 781da177e4SLinus Torvalds .get_attention_status = get_attention_status, 791da177e4SLinus Torvalds .get_latch_status = get_latch_status, 801da177e4SLinus Torvalds .get_adapter_status = get_adapter_status, 8181f15442SKenji Kaneshige .get_address = get_address, 821da177e4SLinus Torvalds .get_max_bus_speed = get_max_bus_speed, 831da177e4SLinus Torvalds .get_cur_bus_speed = get_cur_bus_speed, 841da177e4SLinus Torvalds }; 851da177e4SLinus Torvalds 861da177e4SLinus Torvalds /** 871da177e4SLinus Torvalds * release_slot - free up the memory used by a slot 881da177e4SLinus Torvalds * @hotplug_slot: slot to free 891da177e4SLinus Torvalds */ 901da177e4SLinus Torvalds static void release_slot(struct hotplug_slot *hotplug_slot) 911da177e4SLinus Torvalds { 92ee17fd93SDely Sy struct slot *slot = hotplug_slot->private; 931da177e4SLinus Torvalds 941da177e4SLinus Torvalds dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); 951da177e4SLinus Torvalds 961da177e4SLinus Torvalds kfree(slot->hotplug_slot->info); 971da177e4SLinus Torvalds kfree(slot->hotplug_slot); 981da177e4SLinus Torvalds kfree(slot); 991da177e4SLinus Torvalds } 1001da177e4SLinus Torvalds 101926030f6SKenji Kaneshige static void make_slot_name(struct slot *slot) 102926030f6SKenji Kaneshige { 103926030f6SKenji Kaneshige snprintf(slot->hotplug_slot->name, SLOT_NAME_SIZE, "%04d_%04d", 104926030f6SKenji Kaneshige slot->bus, slot->number); 105926030f6SKenji Kaneshige } 106926030f6SKenji Kaneshige 107783c49fcSKristen Accardi 108783c49fcSKristen Accardi 109783c49fcSKristen Accardi 110783c49fcSKristen Accardi static int 111783c49fcSKristen Accardi shpchprm_get_physical_slot_number(struct controller *ctrl, u32 *sun, 112783c49fcSKristen Accardi u8 busnum, u8 devnum) 113783c49fcSKristen Accardi { 114783c49fcSKristen Accardi int offset = devnum - ctrl->slot_device_offset; 115783c49fcSKristen Accardi 116783c49fcSKristen Accardi dbg("%s: ctrl->slot_num_inc %d, offset %d\n", __FUNCTION__, 117783c49fcSKristen Accardi ctrl->slot_num_inc, offset); 118783c49fcSKristen Accardi *sun = (u8) (ctrl->first_slot + ctrl->slot_num_inc *offset); 119783c49fcSKristen Accardi return 0; 120783c49fcSKristen Accardi } 121783c49fcSKristen Accardi 122783c49fcSKristen Accardi 123783c49fcSKristen Accardi 1241da177e4SLinus Torvalds static int init_slots(struct controller *ctrl) 1251da177e4SLinus Torvalds { 126926030f6SKenji Kaneshige struct slot *slot; 127926030f6SKenji Kaneshige struct hotplug_slot *hotplug_slot; 128926030f6SKenji Kaneshige struct hotplug_slot_info *info; 129926030f6SKenji Kaneshige int retval = -ENOMEM; 130926030f6SKenji Kaneshige int i; 131926030f6SKenji Kaneshige u32 sun; 1321da177e4SLinus Torvalds 133926030f6SKenji Kaneshige for (i = 0; i < ctrl->num_slots; i++) { 13457c95c0dSKenji Kaneshige slot = kzalloc(sizeof(*slot), GFP_KERNEL); 135926030f6SKenji Kaneshige if (!slot) 1361da177e4SLinus Torvalds goto error; 1371da177e4SLinus Torvalds 13857c95c0dSKenji Kaneshige hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL); 139926030f6SKenji Kaneshige if (!hotplug_slot) 1401da177e4SLinus Torvalds goto error_slot; 141926030f6SKenji Kaneshige slot->hotplug_slot = hotplug_slot; 1421da177e4SLinus Torvalds 14357c95c0dSKenji Kaneshige info = kzalloc(sizeof(*info), GFP_KERNEL); 144926030f6SKenji Kaneshige if (!info) 1451da177e4SLinus Torvalds goto error_hpslot; 146926030f6SKenji Kaneshige hotplug_slot->info = info; 1471da177e4SLinus Torvalds 148bbe779dbSKenji Kaneshige hotplug_slot->name = slot->name; 149926030f6SKenji Kaneshige 150926030f6SKenji Kaneshige slot->hp_slot = i; 151926030f6SKenji Kaneshige slot->ctrl = ctrl; 152926030f6SKenji Kaneshige slot->bus = ctrl->slot_bus; 153926030f6SKenji Kaneshige slot->device = ctrl->slot_device_offset + i; 154926030f6SKenji Kaneshige slot->hpc_ops = ctrl->hpc_ops; 155a246fa4eSKenji Kaneshige mutex_init(&slot->lock); 1561da177e4SLinus Torvalds 1571da177e4SLinus Torvalds if (shpchprm_get_physical_slot_number(ctrl, &sun, 158926030f6SKenji Kaneshige slot->bus, slot->device)) 159bbe779dbSKenji Kaneshige goto error_info; 1601da177e4SLinus Torvalds 161926030f6SKenji Kaneshige slot->number = sun; 162a246fa4eSKenji Kaneshige INIT_WORK(&slot->work, queue_pushbutton_work, slot); 1631da177e4SLinus Torvalds 1641da177e4SLinus Torvalds /* register this slot with the hotplug pci core */ 165926030f6SKenji Kaneshige hotplug_slot->private = slot; 166926030f6SKenji Kaneshige hotplug_slot->release = &release_slot; 167926030f6SKenji Kaneshige make_slot_name(slot); 168926030f6SKenji Kaneshige hotplug_slot->ops = &shpchp_hotplug_slot_ops; 1691da177e4SLinus Torvalds 170926030f6SKenji Kaneshige get_power_status(hotplug_slot, &info->power_status); 171926030f6SKenji Kaneshige get_attention_status(hotplug_slot, &info->attention_status); 172926030f6SKenji Kaneshige get_latch_status(hotplug_slot, &info->latch_status); 173926030f6SKenji Kaneshige get_adapter_status(hotplug_slot, &info->adapter_status); 1741da177e4SLinus Torvalds 175926030f6SKenji Kaneshige dbg("Registering bus=%x dev=%x hp_slot=%x sun=%x " 176926030f6SKenji Kaneshige "slot_device_offset=%x\n", slot->bus, slot->device, 177926030f6SKenji Kaneshige slot->hp_slot, slot->number, ctrl->slot_device_offset); 178926030f6SKenji Kaneshige retval = pci_hp_register(slot->hotplug_slot); 179926030f6SKenji Kaneshige if (retval) { 180926030f6SKenji Kaneshige err("pci_hp_register failed with error %d\n", retval); 181bbe779dbSKenji Kaneshige goto error_info; 1821da177e4SLinus Torvalds } 1831da177e4SLinus Torvalds 1845b1a960dSKenji Kaneshige list_add(&slot->slot_list, &ctrl->slot_list); 1851da177e4SLinus Torvalds } 1861da177e4SLinus Torvalds 1871da177e4SLinus Torvalds return 0; 1881da177e4SLinus Torvalds error_info: 189926030f6SKenji Kaneshige kfree(info); 1901da177e4SLinus Torvalds error_hpslot: 191926030f6SKenji Kaneshige kfree(hotplug_slot); 1921da177e4SLinus Torvalds error_slot: 193926030f6SKenji Kaneshige kfree(slot); 1941da177e4SLinus Torvalds error: 195926030f6SKenji Kaneshige return retval; 1961da177e4SLinus Torvalds } 1971da177e4SLinus Torvalds 198f7391f53SKenji Kaneshige void cleanup_slots(struct controller *ctrl) 1991da177e4SLinus Torvalds { 2005b1a960dSKenji Kaneshige struct list_head *tmp; 2015b1a960dSKenji Kaneshige struct list_head *next; 2025b1a960dSKenji Kaneshige struct slot *slot; 2031da177e4SLinus Torvalds 2045b1a960dSKenji Kaneshige list_for_each_safe(tmp, next, &ctrl->slot_list) { 2055b1a960dSKenji Kaneshige slot = list_entry(tmp, struct slot, slot_list); 2065b1a960dSKenji Kaneshige list_del(&slot->slot_list); 207f7391f53SKenji Kaneshige cancel_delayed_work(&slot->work); 208a246fa4eSKenji Kaneshige flush_scheduled_work(); 209f7391f53SKenji Kaneshige flush_workqueue(shpchp_wq); 2105b1a960dSKenji Kaneshige pci_hp_deregister(slot->hotplug_slot); 2111da177e4SLinus Torvalds } 2121da177e4SLinus Torvalds } 2131da177e4SLinus Torvalds 2141da177e4SLinus Torvalds static int get_ctlr_slot_config(struct controller *ctrl) 2151da177e4SLinus Torvalds { 2161da177e4SLinus Torvalds int num_ctlr_slots; 2171da177e4SLinus Torvalds int first_device_num; 2181da177e4SLinus Torvalds int physical_slot_num; 2191da177e4SLinus Torvalds int updown; 2201da177e4SLinus Torvalds int rc; 2211da177e4SLinus Torvalds int flags; 2221da177e4SLinus Torvalds 223dfcd5f68SKenji Kaneshige rc = shpc_get_ctlr_slot_config(ctrl, &num_ctlr_slots, 224dfcd5f68SKenji Kaneshige &first_device_num, &physical_slot_num, 225dfcd5f68SKenji Kaneshige &updown, &flags); 2261da177e4SLinus Torvalds if (rc) { 227dfcd5f68SKenji Kaneshige err("%s: get_ctlr_slot_config fail for b:d (%x:%x)\n", 228dfcd5f68SKenji Kaneshige __FUNCTION__, ctrl->bus, ctrl->device); 2291da177e4SLinus Torvalds return -1; 2301da177e4SLinus Torvalds } 2311da177e4SLinus Torvalds 2321da177e4SLinus Torvalds ctrl->num_slots = num_ctlr_slots; 2331da177e4SLinus Torvalds ctrl->slot_device_offset = first_device_num; 2341da177e4SLinus Torvalds ctrl->first_slot = physical_slot_num; 2351da177e4SLinus Torvalds ctrl->slot_num_inc = updown; /* either -1 or 1 */ 2361da177e4SLinus Torvalds 237dfcd5f68SKenji Kaneshige dbg("%s: num_slot(0x%x) 1st_dev(0x%x) psn(0x%x) updown(%d) for b:d " 238dfcd5f68SKenji Kaneshige "(%x:%x)\n", __FUNCTION__, num_ctlr_slots, first_device_num, 239dfcd5f68SKenji Kaneshige physical_slot_num, updown, ctrl->bus, ctrl->device); 2401da177e4SLinus Torvalds 2411da177e4SLinus Torvalds return 0; 2421da177e4SLinus Torvalds } 2431da177e4SLinus Torvalds 2441da177e4SLinus Torvalds /* 2451da177e4SLinus Torvalds * set_attention_status - Turns the Amber LED for a slot on, off or blink 2461da177e4SLinus Torvalds */ 2471da177e4SLinus Torvalds static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status) 2481da177e4SLinus Torvalds { 2491da177e4SLinus Torvalds struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); 2501da177e4SLinus Torvalds 2511da177e4SLinus Torvalds dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); 2521da177e4SLinus Torvalds 2531da177e4SLinus Torvalds hotplug_slot->info->attention_status = status; 2541da177e4SLinus Torvalds slot->hpc_ops->set_attention_status(slot, status); 2551da177e4SLinus Torvalds 2561da177e4SLinus Torvalds return 0; 2571da177e4SLinus Torvalds } 2581da177e4SLinus Torvalds 2591da177e4SLinus Torvalds static int enable_slot (struct hotplug_slot *hotplug_slot) 2601da177e4SLinus Torvalds { 2611da177e4SLinus Torvalds struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); 2621da177e4SLinus Torvalds 2631da177e4SLinus Torvalds dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); 2641da177e4SLinus Torvalds 265a246fa4eSKenji Kaneshige return shpchp_sysfs_enable_slot(slot); 2661da177e4SLinus Torvalds } 2671da177e4SLinus Torvalds 2681da177e4SLinus Torvalds static int disable_slot (struct hotplug_slot *hotplug_slot) 2691da177e4SLinus Torvalds { 2701da177e4SLinus Torvalds struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); 2711da177e4SLinus Torvalds 2721da177e4SLinus Torvalds dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); 2731da177e4SLinus Torvalds 274a246fa4eSKenji Kaneshige return shpchp_sysfs_disable_slot(slot); 2751da177e4SLinus Torvalds } 2761da177e4SLinus Torvalds 2771da177e4SLinus Torvalds static int get_power_status (struct hotplug_slot *hotplug_slot, u8 *value) 2781da177e4SLinus Torvalds { 2791da177e4SLinus Torvalds struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); 2801da177e4SLinus Torvalds int retval; 2811da177e4SLinus Torvalds 2821da177e4SLinus Torvalds dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); 2831da177e4SLinus Torvalds 2841da177e4SLinus Torvalds retval = slot->hpc_ops->get_power_status(slot, value); 2851da177e4SLinus Torvalds if (retval < 0) 2861da177e4SLinus Torvalds *value = hotplug_slot->info->power_status; 2871da177e4SLinus Torvalds 2881da177e4SLinus Torvalds return 0; 2891da177e4SLinus Torvalds } 2901da177e4SLinus Torvalds 2911da177e4SLinus Torvalds static int get_attention_status (struct hotplug_slot *hotplug_slot, u8 *value) 2921da177e4SLinus Torvalds { 2931da177e4SLinus Torvalds struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); 2941da177e4SLinus Torvalds int retval; 2951da177e4SLinus Torvalds 2961da177e4SLinus Torvalds dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); 2971da177e4SLinus Torvalds 2981da177e4SLinus Torvalds retval = slot->hpc_ops->get_attention_status(slot, value); 2991da177e4SLinus Torvalds if (retval < 0) 3001da177e4SLinus Torvalds *value = hotplug_slot->info->attention_status; 3011da177e4SLinus Torvalds 3021da177e4SLinus Torvalds return 0; 3031da177e4SLinus Torvalds } 3041da177e4SLinus Torvalds 3051da177e4SLinus Torvalds static int get_latch_status (struct hotplug_slot *hotplug_slot, u8 *value) 3061da177e4SLinus Torvalds { 3071da177e4SLinus Torvalds struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); 3081da177e4SLinus Torvalds int retval; 3091da177e4SLinus Torvalds 3101da177e4SLinus Torvalds dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); 3111da177e4SLinus Torvalds 3121da177e4SLinus Torvalds retval = slot->hpc_ops->get_latch_status(slot, value); 3131da177e4SLinus Torvalds if (retval < 0) 3141da177e4SLinus Torvalds *value = hotplug_slot->info->latch_status; 3151da177e4SLinus Torvalds 3161da177e4SLinus Torvalds return 0; 3171da177e4SLinus Torvalds } 3181da177e4SLinus Torvalds 3191da177e4SLinus Torvalds static int get_adapter_status (struct hotplug_slot *hotplug_slot, u8 *value) 3201da177e4SLinus Torvalds { 3211da177e4SLinus Torvalds struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); 3221da177e4SLinus Torvalds int retval; 3231da177e4SLinus Torvalds 3241da177e4SLinus Torvalds dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); 3251da177e4SLinus Torvalds 3261da177e4SLinus Torvalds retval = slot->hpc_ops->get_adapter_status(slot, value); 3271da177e4SLinus Torvalds if (retval < 0) 3281da177e4SLinus Torvalds *value = hotplug_slot->info->adapter_status; 3291da177e4SLinus Torvalds 3301da177e4SLinus Torvalds return 0; 3311da177e4SLinus Torvalds } 3321da177e4SLinus Torvalds 33381f15442SKenji Kaneshige static int get_address (struct hotplug_slot *hotplug_slot, u32 *value) 33481f15442SKenji Kaneshige { 33581f15442SKenji Kaneshige struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); 33681f15442SKenji Kaneshige struct pci_bus *bus = slot->ctrl->pci_dev->subordinate; 33781f15442SKenji Kaneshige 33881f15442SKenji Kaneshige dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); 33981f15442SKenji Kaneshige 34081f15442SKenji Kaneshige *value = (pci_domain_nr(bus) << 16) | (slot->bus << 8) | slot->device; 34181f15442SKenji Kaneshige 34281f15442SKenji Kaneshige return 0; 34381f15442SKenji Kaneshige } 34481f15442SKenji Kaneshige 3451da177e4SLinus Torvalds static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) 3461da177e4SLinus Torvalds { 3471da177e4SLinus Torvalds struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); 3481da177e4SLinus Torvalds int retval; 3491da177e4SLinus Torvalds 3501da177e4SLinus Torvalds dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); 3511da177e4SLinus Torvalds 3521da177e4SLinus Torvalds retval = slot->hpc_ops->get_max_bus_speed(slot, value); 3531da177e4SLinus Torvalds if (retval < 0) 3541da177e4SLinus Torvalds *value = PCI_SPEED_UNKNOWN; 3551da177e4SLinus Torvalds 3561da177e4SLinus Torvalds return 0; 3571da177e4SLinus Torvalds } 3581da177e4SLinus Torvalds 3591da177e4SLinus Torvalds static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) 3601da177e4SLinus Torvalds { 3611da177e4SLinus Torvalds struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); 3621da177e4SLinus Torvalds int retval; 3631da177e4SLinus Torvalds 3641da177e4SLinus Torvalds dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); 3651da177e4SLinus Torvalds 3661da177e4SLinus Torvalds retval = slot->hpc_ops->get_cur_bus_speed(slot, value); 3671da177e4SLinus Torvalds if (retval < 0) 3681da177e4SLinus Torvalds *value = PCI_SPEED_UNKNOWN; 3691da177e4SLinus Torvalds 3701da177e4SLinus Torvalds return 0; 3711da177e4SLinus Torvalds } 3721da177e4SLinus Torvalds 3731410dc1cSrajesh.shah@intel.com static int is_shpc_capable(struct pci_dev *dev) 3741410dc1cSrajesh.shah@intel.com { 3751410dc1cSrajesh.shah@intel.com if ((dev->vendor == PCI_VENDOR_ID_AMD) || (dev->device == 3761410dc1cSrajesh.shah@intel.com PCI_DEVICE_ID_AMD_GOLAM_7450)) 3771410dc1cSrajesh.shah@intel.com return 1; 3781410dc1cSrajesh.shah@intel.com if (pci_find_capability(dev, PCI_CAP_ID_SHPC)) 3791410dc1cSrajesh.shah@intel.com return 1; 3801410dc1cSrajesh.shah@intel.com 3811410dc1cSrajesh.shah@intel.com return 0; 3821410dc1cSrajesh.shah@intel.com } 3831410dc1cSrajesh.shah@intel.com 3841da177e4SLinus Torvalds static int shpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 3851da177e4SLinus Torvalds { 3861da177e4SLinus Torvalds int rc; 3871da177e4SLinus Torvalds struct controller *ctrl; 3881da177e4SLinus Torvalds struct slot *t_slot; 389dfcd5f68SKenji Kaneshige int first_device_num; /* first PCI device number */ 390dfcd5f68SKenji Kaneshige int num_ctlr_slots; /* number of slots implemented */ 3911da177e4SLinus Torvalds 3921410dc1cSrajesh.shah@intel.com if (!is_shpc_capable(pdev)) 3931410dc1cSrajesh.shah@intel.com return -ENODEV; 3941410dc1cSrajesh.shah@intel.com 39557c95c0dSKenji Kaneshige ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); 3961da177e4SLinus Torvalds if (!ctrl) { 3971da177e4SLinus Torvalds err("%s : out of memory\n", __FUNCTION__); 3981da177e4SLinus Torvalds goto err_out_none; 3991da177e4SLinus Torvalds } 4005b1a960dSKenji Kaneshige INIT_LIST_HEAD(&ctrl->slot_list); 4011da177e4SLinus Torvalds 402ee138334Srajesh.shah@intel.com rc = shpc_init(ctrl, pdev); 4031da177e4SLinus Torvalds if (rc) { 404dfcd5f68SKenji Kaneshige dbg("%s: controller initialization failed\n", 405dfcd5f68SKenji Kaneshige SHPC_MODULE_NAME); 4061da177e4SLinus Torvalds goto err_out_free_ctrl; 4071da177e4SLinus Torvalds } 4081da177e4SLinus Torvalds 4091da177e4SLinus Torvalds pci_set_drvdata(pdev, ctrl); 4101da177e4SLinus Torvalds 4111da177e4SLinus Torvalds ctrl->bus = pdev->bus->number; 4121da177e4SLinus Torvalds ctrl->slot_bus = pdev->subordinate->number; 4131da177e4SLinus Torvalds ctrl->device = PCI_SLOT(pdev->devfn); 4141da177e4SLinus Torvalds ctrl->function = PCI_FUNC(pdev->devfn); 415dfcd5f68SKenji Kaneshige 416dfcd5f68SKenji Kaneshige dbg("ctrl bus=0x%x, device=%x, function=%x, irq=%x\n", 417dfcd5f68SKenji Kaneshige ctrl->bus, ctrl->device, ctrl->function, pdev->irq); 4181da177e4SLinus Torvalds 4191da177e4SLinus Torvalds /* 4201da177e4SLinus Torvalds * Save configuration headers for this and subordinate PCI buses 4211da177e4SLinus Torvalds */ 4221da177e4SLinus Torvalds rc = get_ctlr_slot_config(ctrl); 4231da177e4SLinus Torvalds if (rc) { 4241da177e4SLinus Torvalds err(msg_initialization_err, rc); 425f7391f53SKenji Kaneshige goto err_out_release_ctlr; 4261da177e4SLinus Torvalds } 4271da177e4SLinus Torvalds first_device_num = ctrl->slot_device_offset; 4281da177e4SLinus Torvalds num_ctlr_slots = ctrl->num_slots; 4291da177e4SLinus Torvalds 430dbd7a788Srajesh.shah@intel.com ctrl->add_support = 1; 4311da177e4SLinus Torvalds 4321da177e4SLinus Torvalds /* Setup the slot information structures */ 4331da177e4SLinus Torvalds rc = init_slots(ctrl); 4341da177e4SLinus Torvalds if (rc) { 4351da177e4SLinus Torvalds err(msg_initialization_err, 6); 436f7391f53SKenji Kaneshige goto err_out_release_ctlr; 4371da177e4SLinus Torvalds } 4381da177e4SLinus Torvalds 4391da177e4SLinus Torvalds /* Now hpc_functions (slot->hpc_ops->functions) are ready */ 4401da177e4SLinus Torvalds t_slot = shpchp_find_slot(ctrl, first_device_num); 4411da177e4SLinus Torvalds 4421da177e4SLinus Torvalds /* Check for operation bus speed */ 4431da177e4SLinus Torvalds rc = t_slot->hpc_ops->get_cur_bus_speed(t_slot, &ctrl->speed); 4441da177e4SLinus Torvalds dbg("%s: t_slot->hp_slot %x\n", __FUNCTION__,t_slot->hp_slot); 4451da177e4SLinus Torvalds 4461da177e4SLinus Torvalds if (rc || ctrl->speed == PCI_SPEED_UNKNOWN) { 447dfcd5f68SKenji Kaneshige err(SHPC_MODULE_NAME ": Can't get current bus speed. " 448dfcd5f68SKenji Kaneshige "Set to 33MHz PCI.\n"); 4491da177e4SLinus Torvalds ctrl->speed = PCI_SPEED_33MHz; 4501da177e4SLinus Torvalds } 4511da177e4SLinus Torvalds 4521da177e4SLinus Torvalds shpchp_create_ctrl_files(ctrl); 4531da177e4SLinus Torvalds 4541da177e4SLinus Torvalds return 0; 4551da177e4SLinus Torvalds 456f7391f53SKenji Kaneshige err_out_release_ctlr: 4571da177e4SLinus Torvalds ctrl->hpc_ops->release_ctlr(ctrl); 4581da177e4SLinus Torvalds err_out_free_ctrl: 4591da177e4SLinus Torvalds kfree(ctrl); 4601da177e4SLinus Torvalds err_out_none: 4611da177e4SLinus Torvalds return -ENODEV; 4621da177e4SLinus Torvalds } 4631da177e4SLinus Torvalds 464e6b82b13SKenji Kaneshige static void shpc_remove(struct pci_dev *dev) 4651da177e4SLinus Torvalds { 466e6b82b13SKenji Kaneshige struct controller *ctrl = pci_get_drvdata(dev); 4671da177e4SLinus Torvalds 468c2608a11Srajesh.shah@intel.com shpchp_remove_ctrl_files(ctrl); 4691da177e4SLinus Torvalds ctrl->hpc_ops->release_ctlr(ctrl); 470a4534560SKenji Kaneshige kfree(ctrl); 4711da177e4SLinus Torvalds } 4721da177e4SLinus Torvalds 4731da177e4SLinus Torvalds static struct pci_device_id shpcd_pci_tbl[] = { 474dfcd5f68SKenji Kaneshige {PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) | 0x00), ~0)}, 4751da177e4SLinus Torvalds { /* end: all zeroes */ } 4761da177e4SLinus Torvalds }; 4771da177e4SLinus Torvalds MODULE_DEVICE_TABLE(pci, shpcd_pci_tbl); 4781da177e4SLinus Torvalds 4791da177e4SLinus Torvalds static struct pci_driver shpc_driver = { 4801da177e4SLinus Torvalds .name = SHPC_MODULE_NAME, 4811da177e4SLinus Torvalds .id_table = shpcd_pci_tbl, 4821da177e4SLinus Torvalds .probe = shpc_probe, 483e6b82b13SKenji Kaneshige .remove = shpc_remove, 4841da177e4SLinus Torvalds }; 4851da177e4SLinus Torvalds 4861da177e4SLinus Torvalds static int __init shpcd_init(void) 4871da177e4SLinus Torvalds { 4881da177e4SLinus Torvalds int retval = 0; 4891da177e4SLinus Torvalds 4901da177e4SLinus Torvalds #ifdef CONFIG_HOTPLUG_PCI_SHPC_POLL_EVENT_MODE 4911da177e4SLinus Torvalds shpchp_poll_mode = 1; 4921da177e4SLinus Torvalds #endif 4931da177e4SLinus Torvalds 494f7391f53SKenji Kaneshige shpchp_wq = create_singlethread_workqueue("shpchpd"); 495f7391f53SKenji Kaneshige if (!shpchp_wq) 496f7391f53SKenji Kaneshige return -ENOMEM; 4971da177e4SLinus Torvalds 4981da177e4SLinus Torvalds retval = pci_register_driver(&shpc_driver); 4991da177e4SLinus Torvalds dbg("%s: pci_register_driver = %d\n", __FUNCTION__, retval); 5001da177e4SLinus Torvalds info(DRIVER_DESC " version: " DRIVER_VERSION "\n"); 5011da177e4SLinus Torvalds if (retval) { 502f7391f53SKenji Kaneshige destroy_workqueue(shpchp_wq); 503dbd7a788Srajesh.shah@intel.com } 5041da177e4SLinus Torvalds return retval; 5051da177e4SLinus Torvalds } 5061da177e4SLinus Torvalds 5071da177e4SLinus Torvalds static void __exit shpcd_cleanup(void) 5081da177e4SLinus Torvalds { 5091da177e4SLinus Torvalds dbg("unload_shpchpd()\n"); 5101da177e4SLinus Torvalds pci_unregister_driver(&shpc_driver); 511e6b82b13SKenji Kaneshige destroy_workqueue(shpchp_wq); 5121da177e4SLinus Torvalds info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n"); 5131da177e4SLinus Torvalds } 5141da177e4SLinus Torvalds 5151da177e4SLinus Torvalds module_init(shpcd_init); 5161da177e4SLinus Torvalds module_exit(shpcd_cleanup); 517