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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 *
8 * Copyright(c) 2007 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2016 Intel Deutschland GmbH
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * The full GNU General Public License is included in this distribution
21 * in the file called COPYING.
22 *
23 * Contact Information:
24 * Intel Linux Wireless <linuxwifi@intel.com>
25 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26 *
27 * BSD LICENSE
28 *
29 * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
30 * All rights reserved.
31 *
32 * Redistribution and use in source and binary forms, with or without
33 * modification, are permitted provided that the following conditions
34 * are met:
35 *
36 * * Redistributions of source code must retain the above copyright
37 * notice, this list of conditions and the following disclaimer.
38 * * Redistributions in binary form must reproduce the above copyright
39 * notice, this list of conditions and the following disclaimer in
40 * the documentation and/or other materials provided with the
41 * distribution.
42 * * Neither the name Intel Corporation nor the names of its
43 * contributors may be used to endorse or promote products derived
44 * from this software without specific prior written permission.
45 *
46 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
47 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
48 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
49 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
50 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
51 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
52 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
53 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
54 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
55 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
56 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
57 *
58 *****************************************************************************/
59
60#include <linux/slab.h>
61#include <linux/string.h>
62#include <linux/export.h>
63
64#include "iwl-drv.h"
65#include "iwl-phy-db.h"
66#include "iwl-debug.h"
67#include "iwl-op-mode.h"
68#include "iwl-trans.h"
69
70#define CHANNEL_NUM_SIZE 4 /* num of channels in calib_ch size */
71
72struct iwl_phy_db_entry {
73 u16 size;
74 u8 *data;
75};
76
77/**
78 * struct iwl_phy_db - stores phy configuration and calibration data.
79 *
80 * @cfg: phy configuration.
81 * @calib_nch: non channel specific calibration data.
82 * @calib_ch: channel specific calibration data.
83 * @n_group_papd: number of entries in papd channel group.
84 * @calib_ch_group_papd: calibration data related to papd channel group.
85 * @n_group_txp: number of entries in tx power channel group.
86 * @calib_ch_group_txp: calibration data related to tx power chanel group.
87 */
88struct iwl_phy_db {
89 struct iwl_phy_db_entry cfg;
90 struct iwl_phy_db_entry calib_nch;
91 int n_group_papd;
92 struct iwl_phy_db_entry *calib_ch_group_papd;
93 int n_group_txp;
94 struct iwl_phy_db_entry *calib_ch_group_txp;
95
96 struct iwl_trans *trans;
97};
98
99enum iwl_phy_db_section_type {
100 IWL_PHY_DB_CFG = 1,
101 IWL_PHY_DB_CALIB_NCH,
102 IWL_PHY_DB_UNUSED,
103 IWL_PHY_DB_CALIB_CHG_PAPD,
104 IWL_PHY_DB_CALIB_CHG_TXP,
105 IWL_PHY_DB_MAX
106};
107
108#define PHY_DB_CMD 0x6c
109
110/* for parsing of tx power channel group data that comes from the firmware*/
111struct iwl_phy_db_chg_txp {
112 __le32 space;
113 __le16 max_channel_idx;
114} __packed;
115
116struct iwl_phy_db *iwl_phy_db_init(struct iwl_trans *trans)
117{
118 struct iwl_phy_db *phy_db = kzalloc(sizeof(struct iwl_phy_db),
119 GFP_KERNEL);
120
121 if (!phy_db)
122 return phy_db;
123
124 phy_db->trans = trans;
125
126 phy_db->n_group_txp = -1;
127 phy_db->n_group_papd = -1;
128
129 /* TODO: add default values of the phy db. */
130 return phy_db;
131}
132IWL_EXPORT_SYMBOL(iwl_phy_db_init);
133
134/*
135 * get phy db section: returns a pointer to a phy db section specified by
136 * type and channel group id.
137 */
138static struct iwl_phy_db_entry *
139iwl_phy_db_get_section(struct iwl_phy_db *phy_db,
140 enum iwl_phy_db_section_type type,
141 u16 chg_id)
142{
143 if (!phy_db || type >= IWL_PHY_DB_MAX)
144 return NULL;
145
146 switch (type) {
147 case IWL_PHY_DB_CFG:
148 return &phy_db->cfg;
149 case IWL_PHY_DB_CALIB_NCH:
150 return &phy_db->calib_nch;
151 case IWL_PHY_DB_CALIB_CHG_PAPD:
152 if (chg_id >= phy_db->n_group_papd)
153 return NULL;
154 return &phy_db->calib_ch_group_papd[chg_id];
155 case IWL_PHY_DB_CALIB_CHG_TXP:
156 if (chg_id >= phy_db->n_group_txp)
157 return NULL;
158 return &phy_db->calib_ch_group_txp[chg_id];
159 default:
160 return NULL;
161 }
162 return NULL;
163}
164
165static void iwl_phy_db_free_section(struct iwl_phy_db *phy_db,
166 enum iwl_phy_db_section_type type,
167 u16 chg_id)
168{
169 struct iwl_phy_db_entry *entry =
170 iwl_phy_db_get_section(phy_db, type, chg_id);
171 if (!entry)
172 return;
173
174 kfree(entry->data);
175 entry->data = NULL;
176 entry->size = 0;
177}
178
179void iwl_phy_db_free(struct iwl_phy_db *phy_db)
180{
181 int i;
182
183 if (!phy_db)
184 return;
185
186 iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CFG, 0);
187 iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CALIB_NCH, 0);
188
189 for (i = 0; i < phy_db->n_group_papd; i++)
190 iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CALIB_CHG_PAPD, i);
191 kfree(phy_db->calib_ch_group_papd);
192
193 for (i = 0; i < phy_db->n_group_txp; i++)
194 iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CALIB_CHG_TXP, i);
195 kfree(phy_db->calib_ch_group_txp);
196
197 kfree(phy_db);
198}
199IWL_EXPORT_SYMBOL(iwl_phy_db_free);
200
201int iwl_phy_db_set_section(struct iwl_phy_db *phy_db,
202 struct iwl_rx_packet *pkt)
203{
204 struct iwl_calib_res_notif_phy_db *phy_db_notif =
205 (struct iwl_calib_res_notif_phy_db *)pkt->data;
206 enum iwl_phy_db_section_type type = le16_to_cpu(phy_db_notif->type);
207 u16 size = le16_to_cpu(phy_db_notif->length);
208 struct iwl_phy_db_entry *entry;
209 u16 chg_id = 0;
210
211 if (!phy_db)
212 return -EINVAL;
213
214 if (type == IWL_PHY_DB_CALIB_CHG_PAPD) {
215 chg_id = le16_to_cpup((__le16 *)phy_db_notif->data);
216 if (phy_db && !phy_db->calib_ch_group_papd) {
217 /*
218 * Firmware sends the largest index first, so we can use
219 * it to know how much we should allocate.
220 */
221 phy_db->calib_ch_group_papd = kcalloc(chg_id + 1,
222 sizeof(struct iwl_phy_db_entry),
223 GFP_ATOMIC);
224 if (!phy_db->calib_ch_group_papd)
225 return -ENOMEM;
226 phy_db->n_group_papd = chg_id + 1;
227 }
228 } else if (type == IWL_PHY_DB_CALIB_CHG_TXP) {
229 chg_id = le16_to_cpup((__le16 *)phy_db_notif->data);
230 if (phy_db && !phy_db->calib_ch_group_txp) {
231 /*
232 * Firmware sends the largest index first, so we can use
233 * it to know how much we should allocate.
234 */
235 phy_db->calib_ch_group_txp = kcalloc(chg_id + 1,
236 sizeof(struct iwl_phy_db_entry),
237 GFP_ATOMIC);
238 if (!phy_db->calib_ch_group_txp)
239 return -ENOMEM;
240 phy_db->n_group_txp = chg_id + 1;
241 }
242 }
243
244 entry = iwl_phy_db_get_section(phy_db, type, chg_id);
245 if (!entry)
246 return -EINVAL;
247
248 kfree(entry->data);
249 entry->data = kmemdup(phy_db_notif->data, size, GFP_ATOMIC);
250 if (!entry->data) {
251 entry->size = 0;
252 return -ENOMEM;
253 }
254
255 entry->size = size;
256
257 IWL_DEBUG_INFO(phy_db->trans,
258 "%s(%d): [PHYDB]SET: Type %d , Size: %d\n",
259 __func__, __LINE__, type, size);
260
261 return 0;
262}
263IWL_EXPORT_SYMBOL(iwl_phy_db_set_section);
264
265static int is_valid_channel(u16 ch_id)
266{
267 if (ch_id <= 14 ||
268 (36 <= ch_id && ch_id <= 64 && ch_id % 4 == 0) ||
269 (100 <= ch_id && ch_id <= 140 && ch_id % 4 == 0) ||
270 (145 <= ch_id && ch_id <= 165 && ch_id % 4 == 1))
271 return 1;
272 return 0;
273}
274
275static u8 ch_id_to_ch_index(u16 ch_id)
276{
277 if (WARN_ON(!is_valid_channel(ch_id)))
278 return 0xff;
279
280 if (ch_id <= 14)
281 return ch_id - 1;
282 if (ch_id <= 64)
283 return (ch_id + 20) / 4;
284 if (ch_id <= 140)
285 return (ch_id - 12) / 4;
286 return (ch_id - 13) / 4;
287}
288
289
290static u16 channel_id_to_papd(u16 ch_id)
291{
292 if (WARN_ON(!is_valid_channel(ch_id)))
293 return 0xff;
294
295 if (1 <= ch_id && ch_id <= 14)
296 return 0;
297 if (36 <= ch_id && ch_id <= 64)
298 return 1;
299 if (100 <= ch_id && ch_id <= 140)
300 return 2;
301 return 3;
302}
303
304static u16 channel_id_to_txp(struct iwl_phy_db *phy_db, u16 ch_id)
305{
306 struct iwl_phy_db_chg_txp *txp_chg;
307 int i;
308 u8 ch_index = ch_id_to_ch_index(ch_id);
309 if (ch_index == 0xff)
310 return 0xff;
311
312 for (i = 0; i < phy_db->n_group_txp; i++) {
313 txp_chg = (void *)phy_db->calib_ch_group_txp[i].data;
314 if (!txp_chg)
315 return 0xff;
316 /*
317 * Looking for the first channel group that its max channel is
318 * higher then wanted channel.
319 */
320 if (le16_to_cpu(txp_chg->max_channel_idx) >= ch_index)
321 return i;
322 }
323 return 0xff;
324}
325static
326int iwl_phy_db_get_section_data(struct iwl_phy_db *phy_db,
327 u32 type, u8 **data, u16 *size, u16 ch_id)
328{
329 struct iwl_phy_db_entry *entry;
330 u16 ch_group_id = 0;
331
332 if (!phy_db)
333 return -EINVAL;
334
335 /* find wanted channel group */
336 if (type == IWL_PHY_DB_CALIB_CHG_PAPD)
337 ch_group_id = channel_id_to_papd(ch_id);
338 else if (type == IWL_PHY_DB_CALIB_CHG_TXP)
339 ch_group_id = channel_id_to_txp(phy_db, ch_id);
340
341 entry = iwl_phy_db_get_section(phy_db, type, ch_group_id);
342 if (!entry)
343 return -EINVAL;
344
345 *data = entry->data;
346 *size = entry->size;
347
348 IWL_DEBUG_INFO(phy_db->trans,
349 "%s(%d): [PHYDB] GET: Type %d , Size: %d\n",
350 __func__, __LINE__, type, *size);
351
352 return 0;
353}
354
355static int iwl_send_phy_db_cmd(struct iwl_phy_db *phy_db, u16 type,
356 u16 length, void *data)
357{
358 struct iwl_phy_db_cmd phy_db_cmd;
359 struct iwl_host_cmd cmd = {
360 .id = PHY_DB_CMD,
361 };
362
363 IWL_DEBUG_INFO(phy_db->trans,
364 "Sending PHY-DB hcmd of type %d, of length %d\n",
365 type, length);
366
367 /* Set phy db cmd variables */
368 phy_db_cmd.type = cpu_to_le16(type);
369 phy_db_cmd.length = cpu_to_le16(length);
370
371 /* Set hcmd variables */
372 cmd.data[0] = &phy_db_cmd;
373 cmd.len[0] = sizeof(struct iwl_phy_db_cmd);
374 cmd.data[1] = data;
375 cmd.len[1] = length;
376 cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;
377
378 return iwl_trans_send_cmd(phy_db->trans, &cmd);
379}
380
381static int iwl_phy_db_send_all_channel_groups(
382 struct iwl_phy_db *phy_db,
383 enum iwl_phy_db_section_type type,
384 u8 max_ch_groups)
385{
386 u16 i;
387 int err;
388 struct iwl_phy_db_entry *entry;
389
390 /* Send all the channel specific groups to operational fw */
391 for (i = 0; i < max_ch_groups; i++) {
392 entry = iwl_phy_db_get_section(phy_db,
393 type,
394 i);
395 if (!entry)
396 return -EINVAL;
397
398 if (!entry->size)
399 continue;
400
401 /* Send the requested PHY DB section */
402 err = iwl_send_phy_db_cmd(phy_db,
403 type,
404 entry->size,
405 entry->data);
406 if (err) {
407 IWL_ERR(phy_db->trans,
408 "Can't SEND phy_db section %d (%d), err %d\n",
409 type, i, err);
410 return err;
411 }
412
413 IWL_DEBUG_INFO(phy_db->trans,
414 "Sent PHY_DB HCMD, type = %d num = %d\n",
415 type, i);
416 }
417
418 return 0;
419}
420
421int iwl_send_phy_db_data(struct iwl_phy_db *phy_db)
422{
423 u8 *data = NULL;
424 u16 size = 0;
425 int err;
426
427 IWL_DEBUG_INFO(phy_db->trans,
428 "Sending phy db data and configuration to runtime image\n");
429
430 /* Send PHY DB CFG section */
431 err = iwl_phy_db_get_section_data(phy_db, IWL_PHY_DB_CFG,
432 &data, &size, 0);
433 if (err) {
434 IWL_ERR(phy_db->trans, "Cannot get Phy DB cfg section\n");
435 return err;
436 }
437
438 err = iwl_send_phy_db_cmd(phy_db, IWL_PHY_DB_CFG, size, data);
439 if (err) {
440 IWL_ERR(phy_db->trans,
441 "Cannot send HCMD of Phy DB cfg section\n");
442 return err;
443 }
444
445 err = iwl_phy_db_get_section_data(phy_db, IWL_PHY_DB_CALIB_NCH,
446 &data, &size, 0);
447 if (err) {
448 IWL_ERR(phy_db->trans,
449 "Cannot get Phy DB non specific channel section\n");
450 return err;
451 }
452
453 err = iwl_send_phy_db_cmd(phy_db, IWL_PHY_DB_CALIB_NCH, size, data);
454 if (err) {
455 IWL_ERR(phy_db->trans,
456 "Cannot send HCMD of Phy DB non specific channel section\n");
457 return err;
458 }
459
460 /* Send all the TXP channel specific data */
461 err = iwl_phy_db_send_all_channel_groups(phy_db,
462 IWL_PHY_DB_CALIB_CHG_PAPD,
463 phy_db->n_group_papd);
464 if (err) {
465 IWL_ERR(phy_db->trans,
466 "Cannot send channel specific PAPD groups\n");
467 return err;
468 }
469
470 /* Send all the TXP channel specific data */
471 err = iwl_phy_db_send_all_channel_groups(phy_db,
472 IWL_PHY_DB_CALIB_CHG_TXP,
473 phy_db->n_group_txp);
474 if (err) {
475 IWL_ERR(phy_db->trans,
476 "Cannot send channel specific TX power groups\n");
477 return err;
478 }
479
480 IWL_DEBUG_INFO(phy_db->trans,
481 "Finished sending phy db non channel data\n");
482 return 0;
483}
484IWL_EXPORT_SYMBOL(iwl_send_phy_db_data);