summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/iwlwifi/iwl-agn-eeprom.c
blob: 2ef9448b1c201ac3063326d9777de22eb02faece (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
 *
 * 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.GPL.
 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
 * Copyright(c) 2005 - 2011 Intel Corporation. All rights reserved.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  * Neither the name Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *****************************************************************************/


#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>

#include <net/mac80211.h>

#include "iwl-commands.h"
#include "iwl-dev.h"
#include "iwl-core.h"
#include "iwl-debug.h"
#include "iwl-agn.h"
#include "iwl-io.h"

/******************************************************************************
 *
 * EEPROM related functions
 *
******************************************************************************/

int iwl_eeprom_check_version(struct iwl_priv *priv)
{
	u16 eeprom_ver;
	u16 calib_ver;

	eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
	calib_ver = iwlagn_eeprom_calib_version(priv);

	if (eeprom_ver < priv->cfg->eeprom_ver ||
	    calib_ver < priv->cfg->eeprom_calib_ver)
		goto err;

	IWL_INFO(priv, "device EEPROM VER=0x%x, CALIB=0x%x\n",
		 eeprom_ver, calib_ver);

	return 0;
err:
	IWL_ERR(priv, "Unsupported (too old) EEPROM VER=0x%x < 0x%x "
		  "CALIB=0x%x < 0x%x\n",
		  eeprom_ver, priv->cfg->eeprom_ver,
		  calib_ver,  priv->cfg->eeprom_calib_ver);
	return -EINVAL;

}

int iwl_eeprom_check_sku(struct iwl_priv *priv)
{
	u16 eeprom_sku;
	u16 radio_cfg;

	eeprom_sku = iwl_eeprom_query16(priv, EEPROM_SKU_CAP);

	if (!priv->cfg->sku) {
		/* not using sku overwrite */
		priv->cfg->sku =
			((eeprom_sku & EEPROM_SKU_CAP_BAND_SELECTION) >>
			EEPROM_SKU_CAP_BAND_POS);
		if (eeprom_sku & EEPROM_SKU_CAP_11N_ENABLE)
			priv->cfg->sku |= IWL_SKU_N;
	}
	if (!priv->cfg->sku) {
		IWL_ERR(priv, "Invalid device sku\n");
		return -EINVAL;
	}

	IWL_INFO(priv, "Device SKU: 0X%x\n", priv->cfg->sku);

	if (!priv->cfg->valid_tx_ant && !priv->cfg->valid_rx_ant) {
		/* not using .cfg overwrite */
		radio_cfg = iwl_eeprom_query16(priv, EEPROM_RADIO_CONFIG);
		priv->cfg->valid_tx_ant = EEPROM_RF_CFG_TX_ANT_MSK(radio_cfg);
		priv->cfg->valid_rx_ant = EEPROM_RF_CFG_RX_ANT_MSK(radio_cfg);
		if (!priv->cfg->valid_tx_ant || !priv->cfg->valid_rx_ant) {
			IWL_ERR(priv, "Invalid chain (0X%x, 0X%x)\n",
				priv->cfg->valid_tx_ant,
				priv->cfg->valid_rx_ant);
			return -EINVAL;
		}
		IWL_INFO(priv, "Valid Tx ant: 0X%x, Valid Rx ant: 0X%x\n",
			 priv->cfg->valid_tx_ant, priv->cfg->valid_rx_ant);
	}
	/*
	 * for some special cases,
	 * EEPROM did not reflect the correct antenna setting
	 * so overwrite the valid tx/rx antenna from .cfg
	 */
	return 0;
}

void iwl_eeprom_get_mac(const struct iwl_priv *priv, u8 *mac)
{
	const u8 *addr = priv->cfg->ops->lib->eeprom_ops.query_addr(priv,
					EEPROM_MAC_ADDRESS);
	memcpy(mac, addr, ETH_ALEN);
}

/**
 * iwl_get_max_txpower_avg - get the highest tx power from all chains.
 *     find the highest tx power from all chains for the channel
 */
static s8 iwl_get_max_txpower_avg(struct iwl_priv *priv,
		struct iwl_eeprom_enhanced_txpwr *enhanced_txpower,
		int element, s8 *max_txpower_in_half_dbm)
{
	s8 max_txpower_avg = 0; /* (dBm) */

	/* Take the highest tx power from any valid chains */
	if ((priv->cfg->valid_tx_ant & ANT_A) &&
	    (enhanced_txpower[element].chain_a_max > max_txpower_avg))
		max_txpower_avg = enhanced_txpower[element].chain_a_max;
	if ((priv->cfg->valid_tx_ant & ANT_B) &&
	    (enhanced_txpower[element].chain_b_max > max_txpower_avg))
		max_txpower_avg = enhanced_txpower[element].chain_b_max;
	if ((priv->cfg->valid_tx_ant & ANT_C) &&
	    (enhanced_txpower[element].chain_c_max > max_txpower_avg))
		max_txpower_avg = enhanced_txpower[element].chain_c_max;
	if (((priv->cfg->valid_tx_ant == ANT_AB) |
	    (priv->cfg->valid_tx_ant == ANT_BC) |
	    (priv->cfg->valid_tx_ant == ANT_AC)) &&
	    (enhanced_txpower[element].mimo2_max > max_txpower_avg))
		max_txpower_avg =  enhanced_txpower[element].mimo2_max;
	if ((priv->cfg->valid_tx_ant == ANT_ABC) &&
	    (enhanced_txpower[element].mimo3_max > max_txpower_avg))
		max_txpower_avg = enhanced_txpower[element].mimo3_max;

	/*
	 * max. tx power in EEPROM is in 1/2 dBm format
	 * convert from 1/2 dBm to dBm (round-up convert)
	 * but we also do not want to loss 1/2 dBm resolution which
	 * will impact performance
	 */
	*max_txpower_in_half_dbm = max_txpower_avg;
	return (max_txpower_avg & 0x01) + (max_txpower_avg >> 1);
}

static void
iwlcore_eeprom_enh_txp_read_element(struct iwl_priv *priv,
				    struct iwl_eeprom_enhanced_txpwr *txp,
				    s8 max_txpower_avg)
{
	int ch_idx;
	bool is_ht40 = txp->flags & IWL_EEPROM_ENH_TXP_FL_40MHZ;
	enum ieee80211_band band;

	band = txp->flags & IWL_EEPROM_ENH_TXP_FL_BAND_52G ?
		IEEE80211_BAND_5GHZ : IEEE80211_BAND_2GHZ;

	for (ch_idx = 0; ch_idx < priv->channel_count; ch_idx++) {
		struct iwl_channel_info *ch_info = &priv->channel_info[ch_idx];

		/* update matching channel or from common data only */
		if (txp->channel != 0 && ch_info->channel != txp->channel)
			continue;

		/* update matching band only */
		if (band != ch_info->band)
			continue;

		if (ch_info->max_power_avg < max_txpower_avg && !is_ht40) {
			ch_info->max_power_avg = max_txpower_avg;
			ch_info->curr_txpow = max_txpower_avg;
			ch_info->scan_power = max_txpower_avg;
		}

		if (is_ht40 && ch_info->ht40_max_power_avg < max_txpower_avg)
			ch_info->ht40_max_power_avg = max_txpower_avg;
	}
}

#define EEPROM_TXP_OFFS	(0x00 | INDIRECT_ADDRESS | INDIRECT_TXP_LIMIT)
#define EEPROM_TXP_ENTRY_LEN sizeof(struct iwl_eeprom_enhanced_txpwr)
#define EEPROM_TXP_SZ_OFFS (0x00 | INDIRECT_ADDRESS | INDIRECT_TXP_LIMIT_SIZE)

#define TXP_CHECK_AND_PRINT(x) ((txp->flags & IWL_EEPROM_ENH_TXP_FL_##x) \
			    ? # x " " : "")

void iwlcore_eeprom_enhanced_txpower(struct iwl_priv *priv)
{
	struct iwl_eeprom_enhanced_txpwr *txp_array, *txp;
	int idx, entries;
	__le16 *txp_len;
	s8 max_txp_avg, max_txp_avg_halfdbm;

	BUILD_BUG_ON(sizeof(struct iwl_eeprom_enhanced_txpwr) != 8);

	/* the length is in 16-bit words, but we want entries */
	txp_len = (__le16 *) iwlagn_eeprom_query_addr(priv, EEPROM_TXP_SZ_OFFS);
	entries = le16_to_cpup(txp_len) * 2 / EEPROM_TXP_ENTRY_LEN;

	txp_array = (void *) iwlagn_eeprom_query_addr(priv, EEPROM_TXP_OFFS);

	for (idx = 0; idx < entries; idx++) {
		txp = &txp_array[idx];
		/* skip invalid entries */
		if (!(txp->flags & IWL_EEPROM_ENH_TXP_FL_VALID))
			continue;

		IWL_DEBUG_EEPROM(priv, "%s %d:\t %s%s%s%s%s%s%s%s (0x%02x)\n",
				 (txp->channel && (txp->flags &
					IWL_EEPROM_ENH_TXP_FL_COMMON_TYPE)) ?
					"Common " : (txp->channel) ?
					"Channel" : "Common",
				 (txp->channel),
				 TXP_CHECK_AND_PRINT(VALID),
				 TXP_CHECK_AND_PRINT(BAND_52G),
				 TXP_CHECK_AND_PRINT(OFDM),
				 TXP_CHECK_AND_PRINT(40MHZ),
				 TXP_CHECK_AND_PRINT(HT_AP),
				 TXP_CHECK_AND_PRINT(RES1),
				 TXP_CHECK_AND_PRINT(RES2),
				 TXP_CHECK_AND_PRINT(COMMON_TYPE),
				 txp->flags);
		IWL_DEBUG_EEPROM(priv, "\t\t chain_A: 0x%02x "
				 "chain_B: 0X%02x chain_C: 0X%02x\n",
				 txp->chain_a_max, txp->chain_b_max,
				 txp->chain_c_max);
		IWL_DEBUG_EEPROM(priv, "\t\t MIMO2: 0x%02x "
				 "MIMO3: 0x%02x High 20_on_40: 0x%02x "
				 "Low 20_on_40: 0x%02x\n",
				 txp->mimo2_max, txp->mimo3_max,
				 ((txp->delta_20_in_40 & 0xf0) >> 4),
				 (txp->delta_20_in_40 & 0x0f));

		max_txp_avg = iwl_get_max_txpower_avg(priv, txp_array, idx,
						      &max_txp_avg_halfdbm);

		/*
		 * Update the user limit values values to the highest
		 * power supported by any channel
		 */
		if (max_txp_avg > priv->tx_power_user_lmt)
			priv->tx_power_user_lmt = max_txp_avg;
		if (max_txp_avg_halfdbm > priv->tx_power_lmt_in_half_dbm)
			priv->tx_power_lmt_in_half_dbm = max_txp_avg_halfdbm;

		iwlcore_eeprom_enh_txp_read_element(priv, txp, max_txp_avg);
	}
}
OpenPOWER on IntegriCloud