/* * ACPI PCI 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) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com) * Copyright (C) 2002,2003 Takayoshi Kochi (t-kochi@bq.jp.nec.com) * Copyright (C) 2002,2003 NEC 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 , * * */ #include #include #include #include #include #include #include #include "pci_hotplug.h" #include "acpiphp.h" static LIST_HEAD(slot_list); #if !defined(CONFIG_HOTPLUG_PCI_ACPI_MODULE) #define MY_NAME "acpiphp" #else #define MY_NAME THIS_MODULE->name #endif static int debug; int acpiphp_debug; /* local variables */ static int num_slots; #define DRIVER_VERSION "0.4" #define DRIVER_AUTHOR "Greg Kroah-Hartman , Takayoshi Kochi " #define DRIVER_DESC "ACPI Hot Plug PCI Controller Driver" MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL"); MODULE_PARM(debug, "i"); MODULE_PARM_DESC(debug, "Debugging mode enabled or not"); static int enable_slot (struct hotplug_slot *slot); static int disable_slot (struct hotplug_slot *slot); static int set_attention_status (struct hotplug_slot *slot, u8 value); static int hardware_test (struct hotplug_slot *slot, u32 value); 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_address (struct hotplug_slot *slot, u32 *value); static int get_latch_status (struct hotplug_slot *slot, u8 *value); static int get_adapter_status (struct hotplug_slot *slot, u8 *value); static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value); static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value); static struct hotplug_slot_ops acpi_hotplug_slot_ops = { .owner = THIS_MODULE, .enable_slot = enable_slot, .disable_slot = disable_slot, .set_attention_status = set_attention_status, .hardware_test = hardware_test, .get_power_status = get_power_status, .get_attention_status = get_attention_status, .get_latch_status = get_latch_status, .get_adapter_status = get_adapter_status, .get_address = get_address, .get_max_bus_speed = get_max_bus_speed, .get_cur_bus_speed = get_cur_bus_speed, }; /* Inline functions to check the sanity of a pointer that is passed to us */ static inline int slot_paranoia_check (struct slot *slot, const char *function) { if (!slot) { dbg("%s - slot == NULL\n", function); return -1; } if (slot->magic != SLOT_MAGIC) { dbg("%s - bad magic number for slot\n", function); return -1; } if (!slot->hotplug_slot) { dbg("%s - slot->hotplug_slot == NULL!\n", function); return -1; } return 0; } static inline struct slot *get_slot (struct hotplug_slot *hotplug_slot, const char *function) { struct slot *slot; if (!hotplug_slot) { dbg("%s - hotplug_slot == NULL\n", function); return NULL; } slot = (struct slot *)hotplug_slot->private; if (slot_paranoia_check(slot, function)) return NULL; return slot; } /** * enable_slot - power on and enable a slot * @hotplug_slot: slot to enable * * Actual tasks are done in acpiphp_enable_slot() * */ static int enable_slot (struct hotplug_slot *hotplug_slot) { struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); int retval = 0; if (slot == NULL) return -ENODEV; dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); /* enable the specified slot */ retval = acpiphp_enable_slot(slot->acpi_slot); return retval; } /** * disable_slot - disable and power off a slot * @hotplug_slot: slot to disable * * Actual tasks are done in acpiphp_disable_slot() * */ static int disable_slot (struct hotplug_slot *hotplug_slot) { struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); int retval = 0; if (slot == NULL) return -ENODEV; dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); /* disable the specified slot */ retval = acpiphp_disable_slot(slot->acpi_slot); return retval; } /** * set_attention_status - set attention LED * * TBD: * ACPI doesn't have known method to manipulate * attention status LED. * */ static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status) { int retval = 0; dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); switch (status) { case 0: /* FIXME turn light off */ hotplug_slot->info->attention_status = 0; break; case 1: default: /* FIXME turn light on */ hotplug_slot->info->attention_status = 1; break; } return retval; } /** * hardware_test - hardware test * * We have nothing to do for now... * */ static int hardware_test (struct hotplug_slot *hotplug_slot, u32 value) { struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); int retval = 0; if (slot == NULL) return -ENODEV; dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); err("No hardware tests are defined for this driver\n"); retval = -ENODEV; return retval; } /** * get_power_status - get power status of a slot * @hotplug_slot: slot to get status * @value: pointer to store status * * Some platforms may not implement _STA method properly. * In that case, the value returned may not be reliable. * */ static int get_power_status (struct hotplug_slot *hotplug_slot, u8 *value) { struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); int retval = 0; if (slot == NULL) return -ENODEV; dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); *value = acpiphp_get_power_status(slot->acpi_slot); return retval; } /** * get_attention_status - get attention LED status * * TBD: * ACPI doesn't provide any formal means to access attention LED status. * */ static int get_attention_status (struct hotplug_slot *hotplug_slot, u8 *value) { int retval = 0; dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); *value = hotplug_slot->info->attention_status; return retval; } /** * get_latch_status - get latch status of a slot * @hotplug_slot: slot to get status * @value: pointer to store status * * ACPI doesn't provide any formal means to access latch status. * Instead, we fake latch status from _STA * */ static int get_latch_status (struct hotplug_slot *hotplug_slot, u8 *value) { struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); int retval = 0; if (slot == NULL) return -ENODEV; dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); *value = acpiphp_get_latch_status(slot->acpi_slot); return retval; } /** * get_adapter_status - get adapter status of a slot * @hotplug_slot: slot to get status * @value: pointer to store status * * ACPI doesn't provide any formal means to access adapter status. * Instead, we fake adapter status from _STA * */ static int get_adapter_status (struct hotplug_slot *hotplug_slot, u8 *value) { struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); int retval = 0; if (slot == NULL) return -ENODEV; dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); *value = acpiphp_get_adapter_status(slot->acpi_slot); return retval; } /** * get_address - get pci address of a slot * @hotplug_slot: slot to get status * @busdev: pointer to struct pci_busdev (seg, bus, dev) * */ static int get_address (struct hotplug_slot *hotplug_slot, u32 *value) { struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); int retval = 0; if (slot == NULL) return -ENODEV; dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); *value = acpiphp_get_address(slot->acpi_slot); return retval; } /* return dummy value because ACPI doesn't provide any method... */ static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) { struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); if (slot == NULL) return -ENODEV; *value = PCI_SPEED_UNKNOWN; return 0; } /* return dummy value because ACPI doesn't provide any method... */ static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) { struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); if (slot == NULL) return -ENODEV; *value = PCI_SPEED_UNKNOWN; return 0; } static int __init init_acpi (void) { int retval; /* initialize internal data structure etc. */ retval = acpiphp_glue_init(); /* read initial number of slots */ if (!retval) { num_slots = acpiphp_get_num_slots(); if (num_slots == 0) retval = -ENODEV; } return retval; } /** * make_slot_name - make a slot name that appears in pcihpfs * @slot: slot to name * */ static void make_slot_name (struct slot *slot) { snprintf(slot->hotplug_slot->name, SLOT_NAME_SIZE, "%u", slot->acpi_slot->sun); } /** * 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 = get_slot(hotplug_slot, __FUNCTION__); if (slot == NULL) return; dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); kfree(slot->hotplug_slot->info); kfree(slot->hotplug_slot->name); kfree(slot->hotplug_slot); kfree(slot); } /** * init_slots - initialize 'struct slot' structures for each slot * */ static int __init init_slots (void) { struct slot *slot; int retval = 0; int i; for (i = 0; i < num_slots; ++i) { slot = kmalloc(sizeof(struct slot), GFP_KERNEL); if (!slot) return -ENOMEM; memset(slot, 0, sizeof(struct slot)); slot->hotplug_slot = kmalloc(sizeof(struct hotplug_slot), GFP_KERNEL); if (!slot->hotplug_slot) { kfree(slot); return -ENOMEM; } memset(slot->hotplug_slot, 0, sizeof(struct hotplug_slot)); slot->hotplug_slot->info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL); if (!slot->hotplug_slot->info) { kfree(slot->hotplug_slot); kfree(slot); return -ENOMEM; } memset(slot->hotplug_slot->info, 0, sizeof(struct hotplug_slot_info)); slot->hotplug_slot->name = kmalloc(SLOT_NAME_SIZE, GFP_KERNEL); if (!slot->hotplug_slot->name) { kfree(slot->hotplug_slot->info); kfree(slot->hotplug_slot); kfree(slot); return -ENOMEM; } slot->magic = SLOT_MAGIC; slot->number = i; slot->hotplug_slot->private = slot; slot->hotplug_slot->release = &release_slot; slot->hotplug_slot->ops = &acpi_hotplug_slot_ops; slot->acpi_slot = get_slot_from_id(i); slot->hotplug_slot->info->power_status = acpiphp_get_power_status(slot->acpi_slot); slot->hotplug_slot->info->attention_status = acpiphp_get_attention_status(slot->acpi_slot); slot->hotplug_slot->info->latch_status = acpiphp_get_latch_status(slot->acpi_slot); slot->hotplug_slot->info->adapter_status = acpiphp_get_adapter_status(slot->acpi_slot); make_slot_name(slot); retval = pci_hp_register(slot->hotplug_slot); if (retval) { err("pci_hp_register failed with error %d\n", retval); release_slot(slot->hotplug_slot); return retval; } /* add slot to our internal list */ list_add(&slot->slot_list, &slot_list); info("Slot [%s] registered\n", slot->hotplug_slot->name); } return retval; } static void __exit cleanup_slots (void) { struct list_head *tmp, *n; struct slot *slot; list_for_each_safe (tmp, n, &slot_list) { /* memory will be freed in release_slot callback */ slot = list_entry(tmp, struct slot, slot_list); list_del(&slot->slot_list); pci_hp_deregister(slot->hotplug_slot); } return; } static int __init acpiphp_init(void) { int retval; info(DRIVER_DESC " version: " DRIVER_VERSION "\n"); acpiphp_debug = debug; /* read all the ACPI info from the system */ retval = init_acpi(); if (retval) return retval; retval = init_slots(); if (retval) return retval; return 0; } static void __exit acpiphp_exit(void) { cleanup_slots(); /* deallocate internal data structures etc. */ acpiphp_glue_exit(); } module_init(acpiphp_init); module_exit(acpiphp_exit);