summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/intel/iwlwifi/iwl-phy-db.c
blob: b7cd813ba70f1b9caf782e98166331b91073b005 (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
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
/******************************************************************************
 *
 * 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) 2007 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2016 Intel Deutschland GmbH
 *
 * 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 COPYING.
 *
 * Contact Information:
 *  Intel Linux Wireless <linuxwifi@intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
 * Copyright(c) 2005 - 2014 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/slab.h>
#include <linux/string.h>
#include <linux/export.h>

#include "iwl-drv.h"
#include "iwl-phy-db.h"
#include "iwl-debug.h"
#include "iwl-op-mode.h"
#include "iwl-trans.h"

#define CHANNEL_NUM_SIZE	4	/* num of channels in calib_ch size */

struct iwl_phy_db_entry {
	u16	size;
	u8	*data;
};

/**
 * struct iwl_phy_db - stores phy configuration and calibration data.
 *
 * @cfg: phy configuration.
 * @calib_nch: non channel specific calibration data.
 * @calib_ch: channel specific calibration data.
 * @n_group_papd: number of entries in papd channel group.
 * @calib_ch_group_papd: calibration data related to papd channel group.
 * @n_group_txp: number of entries in tx power channel group.
 * @calib_ch_group_txp: calibration data related to tx power chanel group.
 */
struct iwl_phy_db {
	struct iwl_phy_db_entry	cfg;
	struct iwl_phy_db_entry	calib_nch;
	int n_group_papd;
	struct iwl_phy_db_entry	*calib_ch_group_papd;
	int n_group_txp;
	struct iwl_phy_db_entry	*calib_ch_group_txp;

	struct iwl_trans *trans;
};

enum iwl_phy_db_section_type {
	IWL_PHY_DB_CFG = 1,
	IWL_PHY_DB_CALIB_NCH,
	IWL_PHY_DB_UNUSED,
	IWL_PHY_DB_CALIB_CHG_PAPD,
	IWL_PHY_DB_CALIB_CHG_TXP,
	IWL_PHY_DB_MAX
};

#define PHY_DB_CMD 0x6c

/* for parsing of tx power channel group data that comes from the firmware*/
struct iwl_phy_db_chg_txp {
	__le32 space;
	__le16 max_channel_idx;
} __packed;

struct iwl_phy_db *iwl_phy_db_init(struct iwl_trans *trans)
{
	struct iwl_phy_db *phy_db = kzalloc(sizeof(struct iwl_phy_db),
					    GFP_KERNEL);

	if (!phy_db)
		return phy_db;

	phy_db->trans = trans;

	phy_db->n_group_txp = -1;
	phy_db->n_group_papd = -1;

	/* TODO: add default values of the phy db. */
	return phy_db;
}
IWL_EXPORT_SYMBOL(iwl_phy_db_init);

/*
 * get phy db section: returns a pointer to a phy db section specified by
 * type and channel group id.
 */
static struct iwl_phy_db_entry *
iwl_phy_db_get_section(struct iwl_phy_db *phy_db,
		       enum iwl_phy_db_section_type type,
		       u16 chg_id)
{
	if (!phy_db || type >= IWL_PHY_DB_MAX)
		return NULL;

	switch (type) {
	case IWL_PHY_DB_CFG:
		return &phy_db->cfg;
	case IWL_PHY_DB_CALIB_NCH:
		return &phy_db->calib_nch;
	case IWL_PHY_DB_CALIB_CHG_PAPD:
		if (chg_id >= phy_db->n_group_papd)
			return NULL;
		return &phy_db->calib_ch_group_papd[chg_id];
	case IWL_PHY_DB_CALIB_CHG_TXP:
		if (chg_id >= phy_db->n_group_txp)
			return NULL;
		return &phy_db->calib_ch_group_txp[chg_id];
	default:
		return NULL;
	}
	return NULL;
}

static void iwl_phy_db_free_section(struct iwl_phy_db *phy_db,
				    enum iwl_phy_db_section_type type,
				    u16 chg_id)
{
	struct iwl_phy_db_entry *entry =
				iwl_phy_db_get_section(phy_db, type, chg_id);
	if (!entry)
		return;

	kfree(entry->data);
	entry->data = NULL;
	entry->size = 0;
}

void iwl_phy_db_free(struct iwl_phy_db *phy_db)
{
	int i;

	if (!phy_db)
		return;

	iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CFG, 0);
	iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CALIB_NCH, 0);

	for (i = 0; i < phy_db->n_group_papd; i++)
		iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CALIB_CHG_PAPD, i);
	kfree(phy_db->calib_ch_group_papd);

	for (i = 0; i < phy_db->n_group_txp; i++)
		iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CALIB_CHG_TXP, i);
	kfree(phy_db->calib_ch_group_txp);

	kfree(phy_db);
}
IWL_EXPORT_SYMBOL(iwl_phy_db_free);

int iwl_phy_db_set_section(struct iwl_phy_db *phy_db,
			   struct iwl_rx_packet *pkt)
{
	struct iwl_calib_res_notif_phy_db *phy_db_notif =
			(struct iwl_calib_res_notif_phy_db *)pkt->data;
	enum iwl_phy_db_section_type type = le16_to_cpu(phy_db_notif->type);
	u16 size  = le16_to_cpu(phy_db_notif->length);
	struct iwl_phy_db_entry *entry;
	u16 chg_id = 0;

	if (!phy_db)
		return -EINVAL;

	if (type == IWL_PHY_DB_CALIB_CHG_PAPD) {
		chg_id = le16_to_cpup((__le16 *)phy_db_notif->data);
		if (phy_db && !phy_db->calib_ch_group_papd) {
			/*
			 * Firmware sends the largest index first, so we can use
			 * it to know how much we should allocate.
			 */
			phy_db->calib_ch_group_papd = kcalloc(chg_id + 1,
							      sizeof(struct iwl_phy_db_entry),
							      GFP_ATOMIC);
			if (!phy_db->calib_ch_group_papd)
				return -ENOMEM;
			phy_db->n_group_papd = chg_id + 1;
		}
	} else if (type == IWL_PHY_DB_CALIB_CHG_TXP) {
		chg_id = le16_to_cpup((__le16 *)phy_db_notif->data);
		if (phy_db && !phy_db->calib_ch_group_txp) {
			/*
			 * Firmware sends the largest index first, so we can use
			 * it to know how much we should allocate.
			 */
			phy_db->calib_ch_group_txp = kcalloc(chg_id + 1,
							     sizeof(struct iwl_phy_db_entry),
							     GFP_ATOMIC);
			if (!phy_db->calib_ch_group_txp)
				return -ENOMEM;
			phy_db->n_group_txp = chg_id + 1;
		}
	}

	entry = iwl_phy_db_get_section(phy_db, type, chg_id);
	if (!entry)
		return -EINVAL;

	kfree(entry->data);
	entry->data = kmemdup(phy_db_notif->data, size, GFP_ATOMIC);
	if (!entry->data) {
		entry->size = 0;
		return -ENOMEM;
	}

	entry->size = size;

	IWL_DEBUG_INFO(phy_db->trans,
		       "%s(%d): [PHYDB]SET: Type %d , Size: %d\n",
		       __func__, __LINE__, type, size);

	return 0;
}
IWL_EXPORT_SYMBOL(iwl_phy_db_set_section);

static int is_valid_channel(u16 ch_id)
{
	if (ch_id <= 14 ||
	    (36 <= ch_id && ch_id <= 64 && ch_id % 4 == 0) ||
	    (100 <= ch_id && ch_id <= 140 && ch_id % 4 == 0) ||
	    (145 <= ch_id && ch_id <= 165 && ch_id % 4 == 1))
		return 1;
	return 0;
}

static u8 ch_id_to_ch_index(u16 ch_id)
{
	if (WARN_ON(!is_valid_channel(ch_id)))
		return 0xff;

	if (ch_id <= 14)
		return ch_id - 1;
	if (ch_id <= 64)
		return (ch_id + 20) / 4;
	if (ch_id <= 140)
		return (ch_id - 12) / 4;
	return (ch_id - 13) / 4;
}


static u16 channel_id_to_papd(u16 ch_id)
{
	if (WARN_ON(!is_valid_channel(ch_id)))
		return 0xff;

	if (1 <= ch_id && ch_id <= 14)
		return 0;
	if (36 <= ch_id && ch_id <= 64)
		return 1;
	if (100 <= ch_id && ch_id <= 140)
		return 2;
	return 3;
}

static u16 channel_id_to_txp(struct iwl_phy_db *phy_db, u16 ch_id)
{
	struct iwl_phy_db_chg_txp *txp_chg;
	int i;
	u8 ch_index = ch_id_to_ch_index(ch_id);
	if (ch_index == 0xff)
		return 0xff;

	for (i = 0; i < phy_db->n_group_txp; i++) {
		txp_chg = (void *)phy_db->calib_ch_group_txp[i].data;
		if (!txp_chg)
			return 0xff;
		/*
		 * Looking for the first channel group that its max channel is
		 * higher then wanted channel.
		 */
		if (le16_to_cpu(txp_chg->max_channel_idx) >= ch_index)
			return i;
	}
	return 0xff;
}
static
int iwl_phy_db_get_section_data(struct iwl_phy_db *phy_db,
				u32 type, u8 **data, u16 *size, u16 ch_id)
{
	struct iwl_phy_db_entry *entry;
	u16 ch_group_id = 0;

	if (!phy_db)
		return -EINVAL;

	/* find wanted channel group */
	if (type == IWL_PHY_DB_CALIB_CHG_PAPD)
		ch_group_id = channel_id_to_papd(ch_id);
	else if (type == IWL_PHY_DB_CALIB_CHG_TXP)
		ch_group_id = channel_id_to_txp(phy_db, ch_id);

	entry = iwl_phy_db_get_section(phy_db, type, ch_group_id);
	if (!entry)
		return -EINVAL;

	*data = entry->data;
	*size = entry->size;

	IWL_DEBUG_INFO(phy_db->trans,
		       "%s(%d): [PHYDB] GET: Type %d , Size: %d\n",
		       __func__, __LINE__, type, *size);

	return 0;
}

static int iwl_send_phy_db_cmd(struct iwl_phy_db *phy_db, u16 type,
			       u16 length, void *data)
{
	struct iwl_phy_db_cmd phy_db_cmd;
	struct iwl_host_cmd cmd = {
		.id = PHY_DB_CMD,
	};

	IWL_DEBUG_INFO(phy_db->trans,
		       "Sending PHY-DB hcmd of type %d, of length %d\n",
		       type, length);

	/* Set phy db cmd variables */
	phy_db_cmd.type = cpu_to_le16(type);
	phy_db_cmd.length = cpu_to_le16(length);

	/* Set hcmd variables */
	cmd.data[0] = &phy_db_cmd;
	cmd.len[0] = sizeof(struct iwl_phy_db_cmd);
	cmd.data[1] = data;
	cmd.len[1] = length;
	cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;

	return iwl_trans_send_cmd(phy_db->trans, &cmd);
}

static int iwl_phy_db_send_all_channel_groups(
					struct iwl_phy_db *phy_db,
					enum iwl_phy_db_section_type type,
					u8 max_ch_groups)
{
	u16 i;
	int err;
	struct iwl_phy_db_entry *entry;

	/* Send all the  channel specific groups to operational fw */
	for (i = 0; i < max_ch_groups; i++) {
		entry = iwl_phy_db_get_section(phy_db,
					       type,
					       i);
		if (!entry)
			return -EINVAL;

		if (!entry->size)
			continue;

		/* Send the requested PHY DB section */
		err = iwl_send_phy_db_cmd(phy_db,
					  type,
					  entry->size,
					  entry->data);
		if (err) {
			IWL_ERR(phy_db->trans,
				"Can't SEND phy_db section %d (%d), err %d\n",
				type, i, err);
			return err;
		}

		IWL_DEBUG_INFO(phy_db->trans,
			       "Sent PHY_DB HCMD, type = %d num = %d\n",
			       type, i);
	}

	return 0;
}

int iwl_send_phy_db_data(struct iwl_phy_db *phy_db)
{
	u8 *data = NULL;
	u16 size = 0;
	int err;

	IWL_DEBUG_INFO(phy_db->trans,
		       "Sending phy db data and configuration to runtime image\n");

	/* Send PHY DB CFG section */
	err = iwl_phy_db_get_section_data(phy_db, IWL_PHY_DB_CFG,
					  &data, &size, 0);
	if (err) {
		IWL_ERR(phy_db->trans, "Cannot get Phy DB cfg section\n");
		return err;
	}

	err = iwl_send_phy_db_cmd(phy_db, IWL_PHY_DB_CFG, size, data);
	if (err) {
		IWL_ERR(phy_db->trans,
			"Cannot send HCMD of  Phy DB cfg section\n");
		return err;
	}

	err = iwl_phy_db_get_section_data(phy_db, IWL_PHY_DB_CALIB_NCH,
					  &data, &size, 0);
	if (err) {
		IWL_ERR(phy_db->trans,
			"Cannot get Phy DB non specific channel section\n");
		return err;
	}

	err = iwl_send_phy_db_cmd(phy_db, IWL_PHY_DB_CALIB_NCH, size, data);
	if (err) {
		IWL_ERR(phy_db->trans,
			"Cannot send HCMD of Phy DB non specific channel section\n");
		return err;
	}

	/* Send all the TXP channel specific data */
	err = iwl_phy_db_send_all_channel_groups(phy_db,
						 IWL_PHY_DB_CALIB_CHG_PAPD,
						 phy_db->n_group_papd);
	if (err) {
		IWL_ERR(phy_db->trans,
			"Cannot send channel specific PAPD groups\n");
		return err;
	}

	/* Send all the TXP channel specific data */
	err = iwl_phy_db_send_all_channel_groups(phy_db,
						 IWL_PHY_DB_CALIB_CHG_TXP,
						 phy_db->n_group_txp);
	if (err) {
		IWL_ERR(phy_db->trans,
			"Cannot send channel specific TX power groups\n");
		return err;
	}

	IWL_DEBUG_INFO(phy_db->trans,
		       "Finished sending phy db non channel data\n");
	return 0;
}
IWL_EXPORT_SYMBOL(iwl_send_phy_db_data);