| /* |
| * Standard Hot Plug Controller Driver |
| * |
| * Copyright (C) 1995,2001 Compaq Computer Corporation |
| * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com) |
| * Copyright (C) 2001 IBM Corp. |
| * Copyright (C) 2003-2004 Intel Corporation |
| * |
| * All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or (at |
| * your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
| * NON INFRINGEMENT. See the GNU General Public License for more |
| * details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| * |
| * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com> |
| * |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <linux/kernel.h> |
| #include <linux/types.h> |
| #include <linux/pci.h> |
| #include <linux/workqueue.h> |
| #include "shpchp.h" |
| |
| /* Global variables */ |
| int shpchp_debug; |
| int shpchp_poll_mode; |
| int shpchp_poll_time; |
| struct workqueue_struct *shpchp_wq; |
| |
| #define DRIVER_VERSION "0.4" |
| #define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>" |
| #define DRIVER_DESC "Standard Hot Plug PCI Controller Driver" |
| |
| MODULE_AUTHOR(DRIVER_AUTHOR); |
| MODULE_DESCRIPTION(DRIVER_DESC); |
| MODULE_LICENSE("GPL"); |
| |
| module_param(shpchp_debug, bool, 0644); |
| module_param(shpchp_poll_mode, bool, 0644); |
| module_param(shpchp_poll_time, int, 0644); |
| MODULE_PARM_DESC(shpchp_debug, "Debugging mode enabled or not"); |
| MODULE_PARM_DESC(shpchp_poll_mode, "Using polling mechanism for hot-plug events or not"); |
| MODULE_PARM_DESC(shpchp_poll_time, "Polling mechanism frequency, in seconds"); |
| |
| #define SHPC_MODULE_NAME "shpchp" |
| |
| static int set_attention_status (struct hotplug_slot *slot, u8 value); |
| static int enable_slot (struct hotplug_slot *slot); |
| static int disable_slot (struct hotplug_slot *slot); |
| static int get_power_status (struct hotplug_slot *slot, u8 *value); |
| static int get_attention_status (struct hotplug_slot *slot, u8 *value); |
| static int get_latch_status (struct hotplug_slot *slot, u8 *value); |
| static int get_adapter_status (struct hotplug_slot *slot, u8 *value); |
| |
| static struct hotplug_slot_ops shpchp_hotplug_slot_ops = { |
| .set_attention_status = set_attention_status, |
| .enable_slot = enable_slot, |
| .disable_slot = disable_slot, |
| .get_power_status = get_power_status, |
| .get_attention_status = get_attention_status, |
| .get_latch_status = get_latch_status, |
| .get_adapter_status = get_adapter_status, |
| }; |
| |
| /** |
| * release_slot - free up the memory used by a slot |
| * @hotplug_slot: slot to free |
| */ |
| static void release_slot(struct hotplug_slot *hotplug_slot) |
| { |
| struct slot *slot = hotplug_slot->private; |
| |
| ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
| __func__, slot_name(slot)); |
| |
| kfree(slot->hotplug_slot->info); |
| kfree(slot->hotplug_slot); |
| kfree(slot); |
| } |
| |
| static int init_slots(struct controller *ctrl) |
| { |
| struct slot *slot; |
| struct hotplug_slot *hotplug_slot; |
| struct hotplug_slot_info *info; |
| char name[SLOT_NAME_SIZE]; |
| int retval = -ENOMEM; |
| int i; |
| |
| for (i = 0; i < ctrl->num_slots; i++) { |
| slot = kzalloc(sizeof(*slot), GFP_KERNEL); |
| if (!slot) |
| goto error; |
| |
| hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL); |
| if (!hotplug_slot) |
| goto error_slot; |
| slot->hotplug_slot = hotplug_slot; |
| |
| info = kzalloc(sizeof(*info), GFP_KERNEL); |
| if (!info) |
| goto error_hpslot; |
| hotplug_slot->info = info; |
| |
| slot->hp_slot = i; |
| slot->ctrl = ctrl; |
| slot->bus = ctrl->pci_dev->subordinate->number; |
| slot->device = ctrl->slot_device_offset + i; |
| slot->hpc_ops = ctrl->hpc_ops; |
| slot->number = ctrl->first_slot + (ctrl->slot_num_inc * i); |
| mutex_init(&slot->lock); |
| INIT_DELAYED_WORK(&slot->work, shpchp_queue_pushbutton_work); |
| |
| /* register this slot with the hotplug pci core */ |
| hotplug_slot->private = slot; |
| hotplug_slot->release = &release_slot; |
| snprintf(name, SLOT_NAME_SIZE, "%d", slot->number); |
| hotplug_slot->ops = &shpchp_hotplug_slot_ops; |
| |
| ctrl_dbg(ctrl, "Registering domain:bus:dev=%04x:%02x:%02x " |
| "hp_slot=%x sun=%x slot_device_offset=%x\n", |
| pci_domain_nr(ctrl->pci_dev->subordinate), |
| slot->bus, slot->device, slot->hp_slot, slot->number, |
| ctrl->slot_device_offset); |
| retval = pci_hp_register(slot->hotplug_slot, |
| ctrl->pci_dev->subordinate, slot->device, name); |
| if (retval) { |
| ctrl_err(ctrl, "pci_hp_register failed with error %d\n", |
| retval); |
| goto error_info; |
| } |
| |
| get_power_status(hotplug_slot, &info->power_status); |
| get_attention_status(hotplug_slot, &info->attention_status); |
| get_latch_status(hotplug_slot, &info->latch_status); |
| get_adapter_status(hotplug_slot, &info->adapter_status); |
| |
| list_add(&slot->slot_list, &ctrl->slot_list); |
| } |
| |
| return 0; |
| error_info: |
| kfree(info); |
| error_hpslot: |
| kfree(hotplug_slot); |
| error_slot: |
| kfree(slot); |
| error: |
| return retval; |
| } |
| |
| void cleanup_slots(struct controller *ctrl) |
| { |
| struct list_head *tmp; |
| struct list_head *next; |
| struct slot *slot; |
| |
| list_for_each_safe(tmp, next, &ctrl->slot_list) { |
| slot = list_entry(tmp, struct slot, slot_list); |
| list_del(&slot->slot_list); |
| cancel_delayed_work(&slot->work); |
| flush_scheduled_work(); |
| flush_workqueue(shpchp_wq); |
| pci_hp_deregister(slot->hotplug_slot); |
| } |
| } |
| |
| /* |
| * set_attention_status - Turns the Amber LED for a slot on, off or blink |
| */ |
| static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status) |
| { |
| struct slot *slot = get_slot(hotplug_slot); |
| |
| ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
| __func__, slot_name(slot)); |
| |
| hotplug_slot->info->attention_status = status; |
| slot->hpc_ops->set_attention_status(slot, status); |
| |
| return 0; |
| } |
| |
| static int enable_slot (struct hotplug_slot *hotplug_slot) |
| { |
| struct slot *slot = get_slot(hotplug_slot); |
| |
| ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
| __func__, slot_name(slot)); |
| |
| return shpchp_sysfs_enable_slot(slot); |
| } |
| |
| static int disable_slot (struct hotplug_slot *hotplug_slot) |
| { |
| struct slot *slot = get_slot(hotplug_slot); |
| |
| ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
| __func__, slot_name(slot)); |
| |
| return shpchp_sysfs_disable_slot(slot); |
| } |
| |
| static int get_power_status (struct hotplug_slot *hotplug_slot, u8 *value) |
| { |
| struct slot *slot = get_slot(hotplug_slot); |
| int retval; |
| |
| ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
| __func__, slot_name(slot)); |
| |
| retval = slot->hpc_ops->get_power_status(slot, value); |
| if (retval < 0) |
| *value = hotplug_slot->info->power_status; |
| |
| return 0; |
| } |
| |
| static int get_attention_status (struct hotplug_slot *hotplug_slot, u8 *value) |
| { |
| struct slot *slot = get_slot(hotplug_slot); |
| int retval; |
| |
| ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
| __func__, slot_name(slot)); |
| |
| retval = slot->hpc_ops->get_attention_status(slot, value); |
| if (retval < 0) |
| *value = hotplug_slot->info->attention_status; |
| |
| return 0; |
| } |
| |
| static int get_latch_status (struct hotplug_slot *hotplug_slot, u8 *value) |
| { |
| struct slot *slot = get_slot(hotplug_slot); |
| int retval; |
| |
| ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
| __func__, slot_name(slot)); |
| |
| retval = slot->hpc_ops->get_latch_status(slot, value); |
| if (retval < 0) |
| *value = hotplug_slot->info->latch_status; |
| |
| return 0; |
| } |
| |
| static int get_adapter_status (struct hotplug_slot *hotplug_slot, u8 *value) |
| { |
| struct slot *slot = get_slot(hotplug_slot); |
| int retval; |
| |
| ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
| __func__, slot_name(slot)); |
| |
| retval = slot->hpc_ops->get_adapter_status(slot, value); |
| if (retval < 0) |
| *value = hotplug_slot->info->adapter_status; |
| |
| return 0; |
| } |
| |
| static int is_shpc_capable(struct pci_dev *dev) |
| { |
| if ((dev->vendor == PCI_VENDOR_ID_AMD) || (dev->device == |
| PCI_DEVICE_ID_AMD_GOLAM_7450)) |
| return 1; |
| if (!pci_find_capability(dev, PCI_CAP_ID_SHPC)) |
| return 0; |
| if (get_hp_hw_control_from_firmware(dev)) |
| return 0; |
| return 1; |
| } |
| |
| static int shpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
| { |
| int rc; |
| struct controller *ctrl; |
| |
| if (!is_shpc_capable(pdev)) |
| return -ENODEV; |
| |
| ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); |
| if (!ctrl) { |
| dev_err(&pdev->dev, "%s: Out of memory\n", __func__); |
| goto err_out_none; |
| } |
| INIT_LIST_HEAD(&ctrl->slot_list); |
| |
| rc = shpc_init(ctrl, pdev); |
| if (rc) { |
| ctrl_dbg(ctrl, "Controller initialization failed\n"); |
| goto err_out_free_ctrl; |
| } |
| |
| pci_set_drvdata(pdev, ctrl); |
| |
| /* Setup the slot information structures */ |
| rc = init_slots(ctrl); |
| if (rc) { |
| ctrl_err(ctrl, "Slot initialization failed\n"); |
| goto err_out_release_ctlr; |
| } |
| |
| rc = shpchp_create_ctrl_files(ctrl); |
| if (rc) |
| goto err_cleanup_slots; |
| |
| return 0; |
| |
| err_cleanup_slots: |
| cleanup_slots(ctrl); |
| err_out_release_ctlr: |
| ctrl->hpc_ops->release_ctlr(ctrl); |
| err_out_free_ctrl: |
| kfree(ctrl); |
| err_out_none: |
| return -ENODEV; |
| } |
| |
| static void shpc_remove(struct pci_dev *dev) |
| { |
| struct controller *ctrl = pci_get_drvdata(dev); |
| |
| shpchp_remove_ctrl_files(ctrl); |
| ctrl->hpc_ops->release_ctlr(ctrl); |
| kfree(ctrl); |
| } |
| |
| static struct pci_device_id shpcd_pci_tbl[] = { |
| {PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) | 0x00), ~0)}, |
| { /* end: all zeroes */ } |
| }; |
| MODULE_DEVICE_TABLE(pci, shpcd_pci_tbl); |
| |
| static struct pci_driver shpc_driver = { |
| .name = SHPC_MODULE_NAME, |
| .id_table = shpcd_pci_tbl, |
| .probe = shpc_probe, |
| .remove = shpc_remove, |
| }; |
| |
| static int __init shpcd_init(void) |
| { |
| int retval = 0; |
| |
| retval = pci_register_driver(&shpc_driver); |
| dbg("%s: pci_register_driver = %d\n", __func__, retval); |
| info(DRIVER_DESC " version: " DRIVER_VERSION "\n"); |
| return retval; |
| } |
| |
| static void __exit shpcd_cleanup(void) |
| { |
| dbg("unload_shpchpd()\n"); |
| pci_unregister_driver(&shpc_driver); |
| info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n"); |
| } |
| |
| module_init(shpcd_init); |
| module_exit(shpcd_cleanup); |