| /****************************************************************************** |
| * |
| * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved. |
| * |
| * Portions of this file are derived from the ipw3945 project, as well |
| * as portions of the ieee80211 subsystem header files. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of version 2 of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * 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. 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., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA |
| * |
| * The full GNU General Public License is included in this distribution in the |
| * file called LICENSE. |
| * |
| * Contact Information: |
| * James P. Ketrenos <ipw2100-admin@linux.intel.com> |
| * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| * |
| *****************************************************************************/ |
| |
| #ifndef __iwl_helpers_h__ |
| #define __iwl_helpers_h__ |
| |
| #include <linux/ctype.h> |
| |
| #define KELVIN_TO_CELSIUS(x) ((x)-273) |
| #define CELSIUS_TO_KELVIN(x) ((x)+273) |
| #define IWL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo)))) |
| |
| |
| static inline struct ieee80211_conf *ieee80211_get_hw_conf( |
| struct ieee80211_hw *hw) |
| { |
| return &hw->conf; |
| } |
| |
| static inline int iwl_check_bits(unsigned long field, unsigned long mask) |
| { |
| return ((field & mask) == mask) ? 1 : 0; |
| } |
| |
| static inline unsigned long elapsed_jiffies(unsigned long start, |
| unsigned long end) |
| { |
| if (end >= start) |
| return end - start; |
| |
| return end + (MAX_JIFFY_OFFSET - start) + 1; |
| } |
| |
| /** |
| * iwl_queue_inc_wrap - increment queue index, wrap back to beginning |
| * @index -- current index |
| * @n_bd -- total number of entries in queue (must be power of 2) |
| */ |
| static inline int iwl_queue_inc_wrap(int index, int n_bd) |
| { |
| return ++index & (n_bd - 1); |
| } |
| |
| /** |
| * iwl_queue_dec_wrap - decrement queue index, wrap back to end |
| * @index -- current index |
| * @n_bd -- total number of entries in queue (must be power of 2) |
| */ |
| static inline int iwl_queue_dec_wrap(int index, int n_bd) |
| { |
| return --index & (n_bd - 1); |
| } |
| |
| /* TODO: Move fw_desc functions to iwl-pci.ko */ |
| static inline void iwl_free_fw_desc(struct pci_dev *pci_dev, |
| struct fw_desc *desc) |
| { |
| if (desc->v_addr) |
| pci_free_consistent(pci_dev, desc->len, |
| desc->v_addr, desc->p_addr); |
| desc->v_addr = NULL; |
| desc->len = 0; |
| } |
| |
| static inline int iwl_alloc_fw_desc(struct pci_dev *pci_dev, |
| struct fw_desc *desc) |
| { |
| desc->v_addr = pci_alloc_consistent(pci_dev, desc->len, &desc->p_addr); |
| return (desc->v_addr != NULL) ? 0 : -ENOMEM; |
| } |
| |
| #endif /* __iwl_helpers_h__ */ |