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1 | /****************************************************************************** |
2 | * | |
3 | * This file is provided under a dual BSD/GPLv2 license. When using or | |
4 | * redistributing this file, you may do so under either license. | |
5 | * | |
6 | * GPL LICENSE SUMMARY | |
7 | * | |
be663ab6 | 8 | * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. |
4bc85c13 WYG |
9 | * |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of version 2 of the GNU General Public License as | |
12 | * published by the Free Software Foundation. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, | |
22 | * USA | |
23 | * | |
24 | * The full GNU General Public License is included in this distribution | |
25 | * in the file called LICENSE.GPL. | |
26 | * | |
27 | * Contact Information: | |
28 | * Intel Linux Wireless <ilw@linux.intel.com> | |
29 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
30 | * | |
31 | * BSD LICENSE | |
32 | * | |
be663ab6 | 33 | * Copyright(c) 2005 - 2011 Intel Corporation. All rights reserved. |
4bc85c13 WYG |
34 | * All rights reserved. |
35 | * | |
36 | * Redistribution and use in source and binary forms, with or without | |
37 | * modification, are permitted provided that the following conditions | |
38 | * are met: | |
39 | * | |
40 | * * Redistributions of source code must retain the above copyright | |
41 | * notice, this list of conditions and the following disclaimer. | |
42 | * * Redistributions in binary form must reproduce the above copyright | |
43 | * notice, this list of conditions and the following disclaimer in | |
44 | * the documentation and/or other materials provided with the | |
45 | * distribution. | |
46 | * * Neither the name Intel Corporation nor the names of its | |
47 | * contributors may be used to endorse or promote products derived | |
48 | * from this software without specific prior written permission. | |
49 | * | |
50 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
51 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
52 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
53 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
54 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
55 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
56 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
57 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
58 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
59 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
60 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
61 | *****************************************************************************/ | |
62 | ||
4bc85c13 | 63 | |
be663ab6 WYG |
64 | #include <linux/kernel.h> |
65 | #include <linux/module.h> | |
66 | #include <linux/slab.h> | |
67 | #include <linux/init.h> | |
4bc85c13 | 68 | |
be663ab6 | 69 | #include <net/mac80211.h> |
4bc85c13 | 70 | |
be663ab6 WYG |
71 | #include "iwl-commands.h" |
72 | #include "iwl-dev.h" | |
73 | #include "iwl-core.h" | |
74 | #include "iwl-debug.h" | |
75 | #include "iwl-4965.h" | |
76 | #include "iwl-io.h" | |
77 | ||
78 | /****************************************************************************** | |
79 | * | |
80 | * EEPROM related functions | |
81 | * | |
82 | ******************************************************************************/ | |
83 | ||
84 | /* | |
85 | * The device's EEPROM semaphore prevents conflicts between driver and uCode | |
86 | * when accessing the EEPROM; each access is a series of pulses to/from the | |
87 | * EEPROM chip, not a single event, so even reads could conflict if they | |
88 | * weren't arbitrated by the semaphore. | |
89 | */ | |
90 | int iwl4965_eeprom_acquire_semaphore(struct iwl_priv *priv) | |
91 | { | |
92 | u16 count; | |
93 | int ret; | |
94 | ||
95 | for (count = 0; count < EEPROM_SEM_RETRY_LIMIT; count++) { | |
96 | /* Request semaphore */ | |
97 | iwl_legacy_set_bit(priv, CSR_HW_IF_CONFIG_REG, | |
98 | CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM); | |
99 | ||
100 | /* See if we got it */ | |
101 | ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG, | |
102 | CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM, | |
103 | CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM, | |
104 | EEPROM_SEM_TIMEOUT); | |
105 | if (ret >= 0) { | |
106 | IWL_DEBUG_IO(priv, | |
107 | "Acquired semaphore after %d tries.\n", | |
108 | count+1); | |
109 | return ret; | |
110 | } | |
111 | } | |
112 | ||
113 | return ret; | |
114 | } | |
115 | ||
116 | void iwl4965_eeprom_release_semaphore(struct iwl_priv *priv) | |
117 | { | |
118 | iwl_legacy_clear_bit(priv, CSR_HW_IF_CONFIG_REG, | |
119 | CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM); | |
120 | ||
121 | } | |
122 | ||
123 | int iwl4965_eeprom_check_version(struct iwl_priv *priv) | |
124 | { | |
125 | u16 eeprom_ver; | |
126 | u16 calib_ver; | |
127 | ||
128 | eeprom_ver = iwl_legacy_eeprom_query16(priv, EEPROM_VERSION); | |
129 | calib_ver = iwl_legacy_eeprom_query16(priv, | |
130 | EEPROM_4965_CALIB_VERSION_OFFSET); | |
131 | ||
132 | if (eeprom_ver < priv->cfg->eeprom_ver || | |
133 | calib_ver < priv->cfg->eeprom_calib_ver) | |
134 | goto err; | |
135 | ||
136 | IWL_INFO(priv, "device EEPROM VER=0x%x, CALIB=0x%x\n", | |
137 | eeprom_ver, calib_ver); | |
138 | ||
139 | return 0; | |
140 | err: | |
141 | IWL_ERR(priv, "Unsupported (too old) EEPROM VER=0x%x < 0x%x " | |
142 | "CALIB=0x%x < 0x%x\n", | |
143 | eeprom_ver, priv->cfg->eeprom_ver, | |
144 | calib_ver, priv->cfg->eeprom_calib_ver); | |
145 | return -EINVAL; | |
146 | ||
147 | } | |
148 | ||
149 | void iwl4965_eeprom_get_mac(const struct iwl_priv *priv, u8 *mac) | |
150 | { | |
151 | const u8 *addr = iwl_legacy_eeprom_query_addr(priv, | |
152 | EEPROM_MAC_ADDRESS); | |
153 | memcpy(mac, addr, ETH_ALEN); | |
154 | } |