1 // SPDX-License-Identifier: GPL-2.0+
3  * Standard Hot Plug Controller Driver
6  * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
8  * Copyright (C) 2003-2004 Intel Corporation
30 #define DRIVER_AUTHOR	"Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy…
31 #define DRIVER_DESC	"Standard Hot Plug PCI Controller Driver"
40 MODULE_PARM_DESC(shpchp_poll_mode, "Using polling mechanism for hot-plug events or not");
71 	for (i = 0; i < ctrl->num_slots; i++) {  in init_slots()
74 			retval = -ENOMEM;  in init_slots()
78 		hotplug_slot = &slot->hotplug_slot;  in init_slots()
80 		slot->hp_slot = i;  in init_slots()
81 		slot->ctrl = ctrl;  in init_slots()
82 		slot->bus = ctrl->pci_dev->subordinate->number;  in init_slots()
83 		slot->device = ctrl->slot_device_offset + i;  in init_slots()
84 		slot->number = ctrl->first_slot + (ctrl->slot_num_inc * i);  in init_slots()
86 		slot->wq = alloc_workqueue("shpchp-%d", 0, 0, slot->number);  in init_slots()
87 		if (!slot->wq) {  in init_slots()
88 			retval = -ENOMEM;  in init_slots()
92 		mutex_init(&slot->lock);  in init_slots()
93 		INIT_DELAYED_WORK(&slot->work, shpchp_queue_pushbutton_work);  in init_slots()
96 		snprintf(name, SLOT_NAME_SIZE, "%d", slot->number);  in init_slots()
97 		hotplug_slot->ops = &shpchp_hotplug_slot_ops;  in init_slots()
100 			 pci_domain_nr(ctrl->pci_dev->subordinate),  in init_slots()
101 			 slot->bus, slot->device, slot->hp_slot, slot->number,  in init_slots()
102 			 ctrl->slot_device_offset);  in init_slots()
104 				ctrl->pci_dev->subordinate, slot->device, name);  in init_slots()
111 		get_power_status(hotplug_slot, &slot->pwr_save);  in init_slots()
112 		get_attention_status(hotplug_slot, &slot->attention_save);  in init_slots()
113 		get_latch_status(hotplug_slot, &slot->latch_save);  in init_slots()
114 		get_adapter_status(hotplug_slot, &slot->presence_save);  in init_slots()
116 		list_add(&slot->slot_list, &ctrl->slot_list);  in init_slots()
121 	destroy_workqueue(slot->wq);  in init_slots()
132 	list_for_each_entry_safe(slot, next, &ctrl->slot_list, slot_list) {  in cleanup_slots()
133 		list_del(&slot->slot_list);  in cleanup_slots()
134 		cancel_delayed_work(&slot->work);  in cleanup_slots()
135 		destroy_workqueue(slot->wq);  in cleanup_slots()
136 		pci_hp_deregister(&slot->hotplug_slot);  in cleanup_slots()
142  * set_attention_status - Turns the Amber LED for a slot on, off or blink
148 	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",  in set_attention_status()
151 	slot->attention_save = status;  in set_attention_status()
161 	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",  in enable_slot()
171 	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",  in disable_slot()
182 	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",  in get_power_status()
187 		*value = slot->pwr_save;  in get_power_status()
197 	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",  in get_attention_status()
202 		*value = slot->attention_save;  in get_attention_status()
212 	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",  in get_latch_status()
217 		*value = slot->latch_save;  in get_latch_status()
227 	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",  in get_adapter_status()
232 		*value = slot->presence_save;  in get_adapter_status()
243 	if (bridge->vendor == PCI_VENDOR_ID_AMD &&  in shpc_capable()
244 	    bridge->device == PCI_DEVICE_ID_AMD_GOLAM_7450)  in shpc_capable()
259 		return -ENODEV;  in shpc_probe()
262 		return -ENODEV;  in shpc_probe()
268 	INIT_LIST_HEAD(&ctrl->slot_list);  in shpc_probe()
289 	pdev->shpc_managed = 1;  in shpc_probe()
299 	return -ENODEV;  in shpc_probe()
306 	dev->shpc_managed = 0;  in shpc_remove()