1 /******************************************************************************
3 * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
24 * Contact Information:
25 * James P. Ketrenos <ipw2100-admin@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
28 *****************************************************************************/
30 #ifndef __iwl_helpers_h__
31 #define __iwl_helpers_h__
33 #include <linux/ctype.h>
35 #define KELVIN_TO_CELSIUS(x) ((x)-273)
36 #define CELSIUS_TO_KELVIN(x) ((x)+273)
37 #define IWL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo))))
40 static inline struct ieee80211_conf *ieee80211_get_hw_conf(
41 struct ieee80211_hw *hw)
46 static inline int iwl_check_bits(unsigned long field, unsigned long mask)
48 return ((field & mask) == mask) ? 1 : 0;
51 static inline unsigned long elapsed_jiffies(unsigned long start,
57 return end + (MAX_JIFFY_OFFSET - start) + 1;
61 * iwl_queue_inc_wrap - increment queue index, wrap back to beginning
62 * @index -- current index
63 * @n_bd -- total number of entries in queue (must be power of 2)
65 static inline int iwl_queue_inc_wrap(int index, int n_bd)
67 return ++index & (n_bd - 1);
71 * iwl_queue_dec_wrap - decrement queue index, wrap back to end
72 * @index -- current index
73 * @n_bd -- total number of entries in queue (must be power of 2)
75 static inline int iwl_queue_dec_wrap(int index, int n_bd)
77 return --index & (n_bd - 1);
80 /* TODO: Move fw_desc functions to iwl-pci.ko */
81 static inline void iwl_free_fw_desc(struct pci_dev *pci_dev,
85 pci_free_consistent(pci_dev, desc->len,
86 desc->v_addr, desc->p_addr);
91 static inline int iwl_alloc_fw_desc(struct pci_dev *pci_dev,
94 desc->v_addr = pci_alloc_consistent(pci_dev, desc->len, &desc->p_addr);
95 return (desc->v_addr != NULL) ? 0 : -ENOMEM;
98 #endif /* __iwl_helpers_h__ */