Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux...
[cascardo/linux.git] / drivers / net / wireless / ath / ath10k / core.c
1 /*
2  * Copyright (c) 2005-2011 Atheros Communications Inc.
3  * Copyright (c) 2011-2013 Qualcomm Atheros, Inc.
4  *
5  * Permission to use, copy, modify, and/or distribute this software for any
6  * purpose with or without fee is hereby granted, provided that the above
7  * copyright notice and this permission notice appear in all copies.
8  *
9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16  */
17
18 #include <linux/module.h>
19 #include <linux/firmware.h>
20
21 #include "core.h"
22 #include "mac.h"
23 #include "htc.h"
24 #include "hif.h"
25 #include "wmi.h"
26 #include "bmi.h"
27 #include "debug.h"
28 #include "htt.h"
29 #include "testmode.h"
30
31 unsigned int ath10k_debug_mask;
32 static bool uart_print;
33 static unsigned int ath10k_p2p;
34 static bool skip_otp;
35
36 module_param_named(debug_mask, ath10k_debug_mask, uint, 0644);
37 module_param(uart_print, bool, 0644);
38 module_param_named(p2p, ath10k_p2p, uint, 0644);
39 module_param(skip_otp, bool, 0644);
40
41 MODULE_PARM_DESC(debug_mask, "Debugging mask");
42 MODULE_PARM_DESC(uart_print, "Uart target debugging");
43 MODULE_PARM_DESC(p2p, "Enable ath10k P2P support");
44 MODULE_PARM_DESC(skip_otp, "Skip otp failure for calibration in testmode");
45
46 static const struct ath10k_hw_params ath10k_hw_params_list[] = {
47         {
48                 .id = QCA988X_HW_2_0_VERSION,
49                 .name = "qca988x hw2.0",
50                 .patch_load_addr = QCA988X_HW_2_0_PATCH_LOAD_ADDR,
51                 .fw = {
52                         .dir = QCA988X_HW_2_0_FW_DIR,
53                         .fw = QCA988X_HW_2_0_FW_FILE,
54                         .otp = QCA988X_HW_2_0_OTP_FILE,
55                         .board = QCA988X_HW_2_0_BOARD_DATA_FILE,
56                 },
57         },
58 };
59
60 static void ath10k_send_suspend_complete(struct ath10k *ar)
61 {
62         ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot suspend complete\n");
63
64         complete(&ar->target_suspend);
65 }
66
67 static int ath10k_init_configure_target(struct ath10k *ar)
68 {
69         u32 param_host;
70         int ret;
71
72         /* tell target which HTC version it is used*/
73         ret = ath10k_bmi_write32(ar, hi_app_host_interest,
74                                  HTC_PROTOCOL_VERSION);
75         if (ret) {
76                 ath10k_err(ar, "settings HTC version failed\n");
77                 return ret;
78         }
79
80         /* set the firmware mode to STA/IBSS/AP */
81         ret = ath10k_bmi_read32(ar, hi_option_flag, &param_host);
82         if (ret) {
83                 ath10k_err(ar, "setting firmware mode (1/2) failed\n");
84                 return ret;
85         }
86
87         /* TODO following parameters need to be re-visited. */
88         /* num_device */
89         param_host |= (1 << HI_OPTION_NUM_DEV_SHIFT);
90         /* Firmware mode */
91         /* FIXME: Why FW_MODE_AP ??.*/
92         param_host |= (HI_OPTION_FW_MODE_AP << HI_OPTION_FW_MODE_SHIFT);
93         /* mac_addr_method */
94         param_host |= (1 << HI_OPTION_MAC_ADDR_METHOD_SHIFT);
95         /* firmware_bridge */
96         param_host |= (0 << HI_OPTION_FW_BRIDGE_SHIFT);
97         /* fwsubmode */
98         param_host |= (0 << HI_OPTION_FW_SUBMODE_SHIFT);
99
100         ret = ath10k_bmi_write32(ar, hi_option_flag, param_host);
101         if (ret) {
102                 ath10k_err(ar, "setting firmware mode (2/2) failed\n");
103                 return ret;
104         }
105
106         /* We do all byte-swapping on the host */
107         ret = ath10k_bmi_write32(ar, hi_be, 0);
108         if (ret) {
109                 ath10k_err(ar, "setting host CPU BE mode failed\n");
110                 return ret;
111         }
112
113         /* FW descriptor/Data swap flags */
114         ret = ath10k_bmi_write32(ar, hi_fw_swap, 0);
115
116         if (ret) {
117                 ath10k_err(ar, "setting FW data/desc swap flags failed\n");
118                 return ret;
119         }
120
121         return 0;
122 }
123
124 static const struct firmware *ath10k_fetch_fw_file(struct ath10k *ar,
125                                                    const char *dir,
126                                                    const char *file)
127 {
128         char filename[100];
129         const struct firmware *fw;
130         int ret;
131
132         if (file == NULL)
133                 return ERR_PTR(-ENOENT);
134
135         if (dir == NULL)
136                 dir = ".";
137
138         snprintf(filename, sizeof(filename), "%s/%s", dir, file);
139         ret = request_firmware(&fw, filename, ar->dev);
140         if (ret)
141                 return ERR_PTR(ret);
142
143         return fw;
144 }
145
146 static int ath10k_push_board_ext_data(struct ath10k *ar, const void *data,
147                                       size_t data_len)
148 {
149         u32 board_data_size = QCA988X_BOARD_DATA_SZ;
150         u32 board_ext_data_size = QCA988X_BOARD_EXT_DATA_SZ;
151         u32 board_ext_data_addr;
152         int ret;
153
154         ret = ath10k_bmi_read32(ar, hi_board_ext_data, &board_ext_data_addr);
155         if (ret) {
156                 ath10k_err(ar, "could not read board ext data addr (%d)\n",
157                            ret);
158                 return ret;
159         }
160
161         ath10k_dbg(ar, ATH10K_DBG_BOOT,
162                    "boot push board extended data addr 0x%x\n",
163                    board_ext_data_addr);
164
165         if (board_ext_data_addr == 0)
166                 return 0;
167
168         if (data_len != (board_data_size + board_ext_data_size)) {
169                 ath10k_err(ar, "invalid board (ext) data sizes %zu != %d+%d\n",
170                            data_len, board_data_size, board_ext_data_size);
171                 return -EINVAL;
172         }
173
174         ret = ath10k_bmi_write_memory(ar, board_ext_data_addr,
175                                       data + board_data_size,
176                                       board_ext_data_size);
177         if (ret) {
178                 ath10k_err(ar, "could not write board ext data (%d)\n", ret);
179                 return ret;
180         }
181
182         ret = ath10k_bmi_write32(ar, hi_board_ext_data_config,
183                                  (board_ext_data_size << 16) | 1);
184         if (ret) {
185                 ath10k_err(ar, "could not write board ext data bit (%d)\n",
186                            ret);
187                 return ret;
188         }
189
190         return 0;
191 }
192
193 static int ath10k_download_board_data(struct ath10k *ar, const void *data,
194                                       size_t data_len)
195 {
196         u32 board_data_size = QCA988X_BOARD_DATA_SZ;
197         u32 address;
198         int ret;
199
200         ret = ath10k_push_board_ext_data(ar, data, data_len);
201         if (ret) {
202                 ath10k_err(ar, "could not push board ext data (%d)\n", ret);
203                 goto exit;
204         }
205
206         ret = ath10k_bmi_read32(ar, hi_board_data, &address);
207         if (ret) {
208                 ath10k_err(ar, "could not read board data addr (%d)\n", ret);
209                 goto exit;
210         }
211
212         ret = ath10k_bmi_write_memory(ar, address, data,
213                                       min_t(u32, board_data_size,
214                                             data_len));
215         if (ret) {
216                 ath10k_err(ar, "could not write board data (%d)\n", ret);
217                 goto exit;
218         }
219
220         ret = ath10k_bmi_write32(ar, hi_board_data_initialized, 1);
221         if (ret) {
222                 ath10k_err(ar, "could not write board data bit (%d)\n", ret);
223                 goto exit;
224         }
225
226 exit:
227         return ret;
228 }
229
230 static int ath10k_download_cal_file(struct ath10k *ar)
231 {
232         int ret;
233
234         if (!ar->cal_file)
235                 return -ENOENT;
236
237         if (IS_ERR(ar->cal_file))
238                 return PTR_ERR(ar->cal_file);
239
240         ret = ath10k_download_board_data(ar, ar->cal_file->data,
241                                          ar->cal_file->size);
242         if (ret) {
243                 ath10k_err(ar, "failed to download cal_file data: %d\n", ret);
244                 return ret;
245         }
246
247         ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot cal file downloaded\n");
248
249         return 0;
250 }
251
252 static int ath10k_download_and_run_otp(struct ath10k *ar)
253 {
254         u32 result, address = ar->hw_params.patch_load_addr;
255         int ret;
256
257         ret = ath10k_download_board_data(ar, ar->board_data, ar->board_len);
258         if (ret) {
259                 ath10k_err(ar, "failed to download board data: %d\n", ret);
260                 return ret;
261         }
262
263         /* OTP is optional */
264
265         if (!ar->otp_data || !ar->otp_len) {
266                 ath10k_warn(ar, "Not running otp, calibration will be incorrect (otp-data %p otp_len %zd)!\n",
267                             ar->otp_data, ar->otp_len);
268                 return 0;
269         }
270
271         ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot upload otp to 0x%x len %zd\n",
272                    address, ar->otp_len);
273
274         ret = ath10k_bmi_fast_download(ar, address, ar->otp_data, ar->otp_len);
275         if (ret) {
276                 ath10k_err(ar, "could not write otp (%d)\n", ret);
277                 return ret;
278         }
279
280         ret = ath10k_bmi_execute(ar, address, 0, &result);
281         if (ret) {
282                 ath10k_err(ar, "could not execute otp (%d)\n", ret);
283                 return ret;
284         }
285
286         ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot otp execute result %d\n", result);
287
288         if (!skip_otp && result != 0) {
289                 ath10k_err(ar, "otp calibration failed: %d", result);
290                 return -EINVAL;
291         }
292
293         return 0;
294 }
295
296 static int ath10k_download_fw(struct ath10k *ar, enum ath10k_firmware_mode mode)
297 {
298         u32 address, data_len;
299         const char *mode_name;
300         const void *data;
301         int ret;
302
303         address = ar->hw_params.patch_load_addr;
304
305         switch (mode) {
306         case ATH10K_FIRMWARE_MODE_NORMAL:
307                 data = ar->firmware_data;
308                 data_len = ar->firmware_len;
309                 mode_name = "normal";
310                 break;
311         case ATH10K_FIRMWARE_MODE_UTF:
312                 data = ar->testmode.utf->data;
313                 data_len = ar->testmode.utf->size;
314                 mode_name = "utf";
315                 break;
316         default:
317                 ath10k_err(ar, "unknown firmware mode: %d\n", mode);
318                 return -EINVAL;
319         }
320
321         ath10k_dbg(ar, ATH10K_DBG_BOOT,
322                    "boot uploading firmware image %p len %d mode %s\n",
323                    data, data_len, mode_name);
324
325         ret = ath10k_bmi_fast_download(ar, address, data, data_len);
326         if (ret) {
327                 ath10k_err(ar, "failed to download %s firmware: %d\n",
328                            mode_name, ret);
329                 return ret;
330         }
331
332         return ret;
333 }
334
335 static void ath10k_core_free_firmware_files(struct ath10k *ar)
336 {
337         if (ar->board && !IS_ERR(ar->board))
338                 release_firmware(ar->board);
339
340         if (ar->otp && !IS_ERR(ar->otp))
341                 release_firmware(ar->otp);
342
343         if (ar->firmware && !IS_ERR(ar->firmware))
344                 release_firmware(ar->firmware);
345
346         if (ar->cal_file && !IS_ERR(ar->cal_file))
347                 release_firmware(ar->cal_file);
348
349         ar->board = NULL;
350         ar->board_data = NULL;
351         ar->board_len = 0;
352
353         ar->otp = NULL;
354         ar->otp_data = NULL;
355         ar->otp_len = 0;
356
357         ar->firmware = NULL;
358         ar->firmware_data = NULL;
359         ar->firmware_len = 0;
360
361         ar->cal_file = NULL;
362 }
363
364 static int ath10k_fetch_cal_file(struct ath10k *ar)
365 {
366         char filename[100];
367
368         /* cal-<bus>-<id>.bin */
369         scnprintf(filename, sizeof(filename), "cal-%s-%s.bin",
370                   ath10k_bus_str(ar->hif.bus), dev_name(ar->dev));
371
372         ar->cal_file = ath10k_fetch_fw_file(ar, ATH10K_FW_DIR, filename);
373         if (IS_ERR(ar->cal_file))
374                 /* calibration file is optional, don't print any warnings */
375                 return PTR_ERR(ar->cal_file);
376
377         ath10k_dbg(ar, ATH10K_DBG_BOOT, "found calibration file %s/%s\n",
378                    ATH10K_FW_DIR, filename);
379
380         return 0;
381 }
382
383 static int ath10k_core_fetch_firmware_api_1(struct ath10k *ar)
384 {
385         int ret = 0;
386
387         if (ar->hw_params.fw.fw == NULL) {
388                 ath10k_err(ar, "firmware file not defined\n");
389                 return -EINVAL;
390         }
391
392         if (ar->hw_params.fw.board == NULL) {
393                 ath10k_err(ar, "board data file not defined");
394                 return -EINVAL;
395         }
396
397         ar->board = ath10k_fetch_fw_file(ar,
398                                          ar->hw_params.fw.dir,
399                                          ar->hw_params.fw.board);
400         if (IS_ERR(ar->board)) {
401                 ret = PTR_ERR(ar->board);
402                 ath10k_err(ar, "could not fetch board data (%d)\n", ret);
403                 goto err;
404         }
405
406         ar->board_data = ar->board->data;
407         ar->board_len = ar->board->size;
408
409         ar->firmware = ath10k_fetch_fw_file(ar,
410                                             ar->hw_params.fw.dir,
411                                             ar->hw_params.fw.fw);
412         if (IS_ERR(ar->firmware)) {
413                 ret = PTR_ERR(ar->firmware);
414                 ath10k_err(ar, "could not fetch firmware (%d)\n", ret);
415                 goto err;
416         }
417
418         ar->firmware_data = ar->firmware->data;
419         ar->firmware_len = ar->firmware->size;
420
421         /* OTP may be undefined. If so, don't fetch it at all */
422         if (ar->hw_params.fw.otp == NULL)
423                 return 0;
424
425         ar->otp = ath10k_fetch_fw_file(ar,
426                                        ar->hw_params.fw.dir,
427                                        ar->hw_params.fw.otp);
428         if (IS_ERR(ar->otp)) {
429                 ret = PTR_ERR(ar->otp);
430                 ath10k_err(ar, "could not fetch otp (%d)\n", ret);
431                 goto err;
432         }
433
434         ar->otp_data = ar->otp->data;
435         ar->otp_len = ar->otp->size;
436
437         return 0;
438
439 err:
440         ath10k_core_free_firmware_files(ar);
441         return ret;
442 }
443
444 static int ath10k_core_fetch_firmware_api_n(struct ath10k *ar, const char *name)
445 {
446         size_t magic_len, len, ie_len;
447         int ie_id, i, index, bit, ret;
448         struct ath10k_fw_ie *hdr;
449         const u8 *data;
450         __le32 *timestamp;
451
452         /* first fetch the firmware file (firmware-*.bin) */
453         ar->firmware = ath10k_fetch_fw_file(ar, ar->hw_params.fw.dir, name);
454         if (IS_ERR(ar->firmware)) {
455                 ath10k_err(ar, "could not fetch firmware file '%s/%s': %ld\n",
456                            ar->hw_params.fw.dir, name, PTR_ERR(ar->firmware));
457                 return PTR_ERR(ar->firmware);
458         }
459
460         data = ar->firmware->data;
461         len = ar->firmware->size;
462
463         /* magic also includes the null byte, check that as well */
464         magic_len = strlen(ATH10K_FIRMWARE_MAGIC) + 1;
465
466         if (len < magic_len) {
467                 ath10k_err(ar, "firmware file '%s/%s' too small to contain magic: %zu\n",
468                            ar->hw_params.fw.dir, name, len);
469                 ret = -EINVAL;
470                 goto err;
471         }
472
473         if (memcmp(data, ATH10K_FIRMWARE_MAGIC, magic_len) != 0) {
474                 ath10k_err(ar, "invalid firmware magic\n");
475                 ret = -EINVAL;
476                 goto err;
477         }
478
479         /* jump over the padding */
480         magic_len = ALIGN(magic_len, 4);
481
482         len -= magic_len;
483         data += magic_len;
484
485         /* loop elements */
486         while (len > sizeof(struct ath10k_fw_ie)) {
487                 hdr = (struct ath10k_fw_ie *)data;
488
489                 ie_id = le32_to_cpu(hdr->id);
490                 ie_len = le32_to_cpu(hdr->len);
491
492                 len -= sizeof(*hdr);
493                 data += sizeof(*hdr);
494
495                 if (len < ie_len) {
496                         ath10k_err(ar, "invalid length for FW IE %d (%zu < %zu)\n",
497                                    ie_id, len, ie_len);
498                         ret = -EINVAL;
499                         goto err;
500                 }
501
502                 switch (ie_id) {
503                 case ATH10K_FW_IE_FW_VERSION:
504                         if (ie_len > sizeof(ar->hw->wiphy->fw_version) - 1)
505                                 break;
506
507                         memcpy(ar->hw->wiphy->fw_version, data, ie_len);
508                         ar->hw->wiphy->fw_version[ie_len] = '\0';
509
510                         ath10k_dbg(ar, ATH10K_DBG_BOOT,
511                                    "found fw version %s\n",
512                                     ar->hw->wiphy->fw_version);
513                         break;
514                 case ATH10K_FW_IE_TIMESTAMP:
515                         if (ie_len != sizeof(u32))
516                                 break;
517
518                         timestamp = (__le32 *)data;
519
520                         ath10k_dbg(ar, ATH10K_DBG_BOOT, "found fw timestamp %d\n",
521                                    le32_to_cpup(timestamp));
522                         break;
523                 case ATH10K_FW_IE_FEATURES:
524                         ath10k_dbg(ar, ATH10K_DBG_BOOT,
525                                    "found firmware features ie (%zd B)\n",
526                                    ie_len);
527
528                         for (i = 0; i < ATH10K_FW_FEATURE_COUNT; i++) {
529                                 index = i / 8;
530                                 bit = i % 8;
531
532                                 if (index == ie_len)
533                                         break;
534
535                                 if (data[index] & (1 << bit)) {
536                                         ath10k_dbg(ar, ATH10K_DBG_BOOT,
537                                                    "Enabling feature bit: %i\n",
538                                                    i);
539                                         __set_bit(i, ar->fw_features);
540                                 }
541                         }
542
543                         ath10k_dbg_dump(ar, ATH10K_DBG_BOOT, "features", "",
544                                         ar->fw_features,
545                                         sizeof(ar->fw_features));
546                         break;
547                 case ATH10K_FW_IE_FW_IMAGE:
548                         ath10k_dbg(ar, ATH10K_DBG_BOOT,
549                                    "found fw image ie (%zd B)\n",
550                                    ie_len);
551
552                         ar->firmware_data = data;
553                         ar->firmware_len = ie_len;
554
555                         break;
556                 case ATH10K_FW_IE_OTP_IMAGE:
557                         ath10k_dbg(ar, ATH10K_DBG_BOOT,
558                                    "found otp image ie (%zd B)\n",
559                                    ie_len);
560
561                         ar->otp_data = data;
562                         ar->otp_len = ie_len;
563
564                         break;
565                 default:
566                         ath10k_warn(ar, "Unknown FW IE: %u\n",
567                                     le32_to_cpu(hdr->id));
568                         break;
569                 }
570
571                 /* jump over the padding */
572                 ie_len = ALIGN(ie_len, 4);
573
574                 len -= ie_len;
575                 data += ie_len;
576         }
577
578         if (!ar->firmware_data || !ar->firmware_len) {
579                 ath10k_warn(ar, "No ATH10K_FW_IE_FW_IMAGE found from '%s/%s', skipping\n",
580                             ar->hw_params.fw.dir, name);
581                 ret = -ENOMEDIUM;
582                 goto err;
583         }
584
585         if (test_bit(ATH10K_FW_FEATURE_WMI_10_2, ar->fw_features) &&
586             !test_bit(ATH10K_FW_FEATURE_WMI_10X, ar->fw_features)) {
587                 ath10k_err(ar, "feature bits corrupted: 10.2 feature requires 10.x feature to be set as well");
588                 ret = -EINVAL;
589                 goto err;
590         }
591
592         /* now fetch the board file */
593         if (ar->hw_params.fw.board == NULL) {
594                 ath10k_err(ar, "board data file not defined");
595                 ret = -EINVAL;
596                 goto err;
597         }
598
599         ar->board = ath10k_fetch_fw_file(ar,
600                                          ar->hw_params.fw.dir,
601                                          ar->hw_params.fw.board);
602         if (IS_ERR(ar->board)) {
603                 ret = PTR_ERR(ar->board);
604                 ath10k_err(ar, "could not fetch board data '%s/%s' (%d)\n",
605                            ar->hw_params.fw.dir, ar->hw_params.fw.board,
606                            ret);
607                 goto err;
608         }
609
610         ar->board_data = ar->board->data;
611         ar->board_len = ar->board->size;
612
613         return 0;
614
615 err:
616         ath10k_core_free_firmware_files(ar);
617         return ret;
618 }
619
620 static int ath10k_core_fetch_firmware_files(struct ath10k *ar)
621 {
622         int ret;
623
624         /* calibration file is optional, don't check for any errors */
625         ath10k_fetch_cal_file(ar);
626
627         ar->fw_api = 3;
628         ath10k_dbg(ar, ATH10K_DBG_BOOT, "trying fw api %d\n", ar->fw_api);
629
630         ret = ath10k_core_fetch_firmware_api_n(ar, ATH10K_FW_API3_FILE);
631         if (ret == 0)
632                 goto success;
633
634         ar->fw_api = 2;
635         ath10k_dbg(ar, ATH10K_DBG_BOOT, "trying fw api %d\n", ar->fw_api);
636
637         ret = ath10k_core_fetch_firmware_api_n(ar, ATH10K_FW_API2_FILE);
638         if (ret == 0)
639                 goto success;
640
641         ar->fw_api = 1;
642         ath10k_dbg(ar, ATH10K_DBG_BOOT, "trying fw api %d\n", ar->fw_api);
643
644         ret = ath10k_core_fetch_firmware_api_1(ar);
645         if (ret)
646                 return ret;
647
648 success:
649         ath10k_dbg(ar, ATH10K_DBG_BOOT, "using fw api %d\n", ar->fw_api);
650
651         return 0;
652 }
653
654 static int ath10k_download_cal_data(struct ath10k *ar)
655 {
656         int ret;
657
658         ret = ath10k_download_cal_file(ar);
659         if (ret == 0) {
660                 ar->cal_mode = ATH10K_CAL_MODE_FILE;
661                 goto done;
662         }
663
664         ath10k_dbg(ar, ATH10K_DBG_BOOT,
665                    "boot did not find a calibration file, try OTP next: %d\n",
666                    ret);
667
668         ret = ath10k_download_and_run_otp(ar);
669         if (ret) {
670                 ath10k_err(ar, "failed to run otp: %d\n", ret);
671                 return ret;
672         }
673
674         ar->cal_mode = ATH10K_CAL_MODE_OTP;
675
676 done:
677         ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot using calibration mode %s\n",
678                    ath10k_cal_mode_str(ar->cal_mode));
679         return 0;
680 }
681
682 static int ath10k_init_uart(struct ath10k *ar)
683 {
684         int ret;
685
686         /*
687          * Explicitly setting UART prints to zero as target turns it on
688          * based on scratch registers.
689          */
690         ret = ath10k_bmi_write32(ar, hi_serial_enable, 0);
691         if (ret) {
692                 ath10k_warn(ar, "could not disable UART prints (%d)\n", ret);
693                 return ret;
694         }
695
696         if (!uart_print)
697                 return 0;
698
699         ret = ath10k_bmi_write32(ar, hi_dbg_uart_txpin, 7);
700         if (ret) {
701                 ath10k_warn(ar, "could not enable UART prints (%d)\n", ret);
702                 return ret;
703         }
704
705         ret = ath10k_bmi_write32(ar, hi_serial_enable, 1);
706         if (ret) {
707                 ath10k_warn(ar, "could not enable UART prints (%d)\n", ret);
708                 return ret;
709         }
710
711         /* Set the UART baud rate to 19200. */
712         ret = ath10k_bmi_write32(ar, hi_desired_baud_rate, 19200);
713         if (ret) {
714                 ath10k_warn(ar, "could not set the baud rate (%d)\n", ret);
715                 return ret;
716         }
717
718         ath10k_info(ar, "UART prints enabled\n");
719         return 0;
720 }
721
722 static int ath10k_init_hw_params(struct ath10k *ar)
723 {
724         const struct ath10k_hw_params *uninitialized_var(hw_params);
725         int i;
726
727         for (i = 0; i < ARRAY_SIZE(ath10k_hw_params_list); i++) {
728                 hw_params = &ath10k_hw_params_list[i];
729
730                 if (hw_params->id == ar->target_version)
731                         break;
732         }
733
734         if (i == ARRAY_SIZE(ath10k_hw_params_list)) {
735                 ath10k_err(ar, "Unsupported hardware version: 0x%x\n",
736                            ar->target_version);
737                 return -EINVAL;
738         }
739
740         ar->hw_params = *hw_params;
741
742         ath10k_dbg(ar, ATH10K_DBG_BOOT, "Hardware name %s version 0x%x\n",
743                    ar->hw_params.name, ar->target_version);
744
745         return 0;
746 }
747
748 static void ath10k_core_restart(struct work_struct *work)
749 {
750         struct ath10k *ar = container_of(work, struct ath10k, restart_work);
751
752         set_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags);
753
754         /* Place a barrier to make sure the compiler doesn't reorder
755          * CRASH_FLUSH and calling other functions.
756          */
757         barrier();
758
759         ieee80211_stop_queues(ar->hw);
760         ath10k_drain_tx(ar);
761         complete_all(&ar->scan.started);
762         complete_all(&ar->scan.completed);
763         complete_all(&ar->scan.on_channel);
764         complete_all(&ar->offchan_tx_completed);
765         complete_all(&ar->install_key_done);
766         complete_all(&ar->vdev_setup_done);
767         wake_up(&ar->htt.empty_tx_wq);
768         wake_up(&ar->wmi.tx_credits_wq);
769         wake_up(&ar->peer_mapping_wq);
770
771         mutex_lock(&ar->conf_mutex);
772
773         switch (ar->state) {
774         case ATH10K_STATE_ON:
775                 ar->state = ATH10K_STATE_RESTARTING;
776                 ath10k_hif_stop(ar);
777                 ath10k_scan_finish(ar);
778                 ieee80211_restart_hw(ar->hw);
779                 break;
780         case ATH10K_STATE_OFF:
781                 /* this can happen if driver is being unloaded
782                  * or if the crash happens during FW probing */
783                 ath10k_warn(ar, "cannot restart a device that hasn't been started\n");
784                 break;
785         case ATH10K_STATE_RESTARTING:
786                 /* hw restart might be requested from multiple places */
787                 break;
788         case ATH10K_STATE_RESTARTED:
789                 ar->state = ATH10K_STATE_WEDGED;
790                 /* fall through */
791         case ATH10K_STATE_WEDGED:
792                 ath10k_warn(ar, "device is wedged, will not restart\n");
793                 break;
794         case ATH10K_STATE_UTF:
795                 ath10k_warn(ar, "firmware restart in UTF mode not supported\n");
796                 break;
797         }
798
799         mutex_unlock(&ar->conf_mutex);
800 }
801
802 static void ath10k_core_init_max_sta_count(struct ath10k *ar)
803 {
804         if (test_bit(ATH10K_FW_FEATURE_WMI_10X, ar->fw_features)) {
805                 ar->max_num_peers = TARGET_10X_NUM_PEERS;
806                 ar->max_num_stations = TARGET_10X_NUM_STATIONS;
807         } else {
808                 ar->max_num_peers = TARGET_NUM_PEERS;
809                 ar->max_num_stations = TARGET_NUM_STATIONS;
810         }
811 }
812
813 int ath10k_core_start(struct ath10k *ar, enum ath10k_firmware_mode mode)
814 {
815         int status;
816
817         lockdep_assert_held(&ar->conf_mutex);
818
819         clear_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags);
820
821         ath10k_bmi_start(ar);
822
823         if (ath10k_init_configure_target(ar)) {
824                 status = -EINVAL;
825                 goto err;
826         }
827
828         status = ath10k_download_cal_data(ar);
829         if (status)
830                 goto err;
831
832         status = ath10k_download_fw(ar, mode);
833         if (status)
834                 goto err;
835
836         status = ath10k_init_uart(ar);
837         if (status)
838                 goto err;
839
840         ar->htc.htc_ops.target_send_suspend_complete =
841                 ath10k_send_suspend_complete;
842
843         status = ath10k_htc_init(ar);
844         if (status) {
845                 ath10k_err(ar, "could not init HTC (%d)\n", status);
846                 goto err;
847         }
848
849         status = ath10k_bmi_done(ar);
850         if (status)
851                 goto err;
852
853         status = ath10k_wmi_attach(ar);
854         if (status) {
855                 ath10k_err(ar, "WMI attach failed: %d\n", status);
856                 goto err;
857         }
858
859         status = ath10k_htt_init(ar);
860         if (status) {
861                 ath10k_err(ar, "failed to init htt: %d\n", status);
862                 goto err_wmi_detach;
863         }
864
865         status = ath10k_htt_tx_alloc(&ar->htt);
866         if (status) {
867                 ath10k_err(ar, "failed to alloc htt tx: %d\n", status);
868                 goto err_wmi_detach;
869         }
870
871         status = ath10k_htt_rx_alloc(&ar->htt);
872         if (status) {
873                 ath10k_err(ar, "failed to alloc htt rx: %d\n", status);
874                 goto err_htt_tx_detach;
875         }
876
877         status = ath10k_hif_start(ar);
878         if (status) {
879                 ath10k_err(ar, "could not start HIF: %d\n", status);
880                 goto err_htt_rx_detach;
881         }
882
883         status = ath10k_htc_wait_target(&ar->htc);
884         if (status) {
885                 ath10k_err(ar, "failed to connect to HTC: %d\n", status);
886                 goto err_hif_stop;
887         }
888
889         if (mode == ATH10K_FIRMWARE_MODE_NORMAL) {
890                 status = ath10k_htt_connect(&ar->htt);
891                 if (status) {
892                         ath10k_err(ar, "failed to connect htt (%d)\n", status);
893                         goto err_hif_stop;
894                 }
895         }
896
897         status = ath10k_wmi_connect(ar);
898         if (status) {
899                 ath10k_err(ar, "could not connect wmi: %d\n", status);
900                 goto err_hif_stop;
901         }
902
903         status = ath10k_htc_start(&ar->htc);
904         if (status) {
905                 ath10k_err(ar, "failed to start htc: %d\n", status);
906                 goto err_hif_stop;
907         }
908
909         if (mode == ATH10K_FIRMWARE_MODE_NORMAL) {
910                 status = ath10k_wmi_wait_for_service_ready(ar);
911                 if (status <= 0) {
912                         ath10k_warn(ar, "wmi service ready event not received");
913                         status = -ETIMEDOUT;
914                         goto err_hif_stop;
915                 }
916         }
917
918         ath10k_dbg(ar, ATH10K_DBG_BOOT, "firmware %s booted\n",
919                    ar->hw->wiphy->fw_version);
920
921         status = ath10k_wmi_cmd_init(ar);
922         if (status) {
923                 ath10k_err(ar, "could not send WMI init command (%d)\n",
924                            status);
925                 goto err_hif_stop;
926         }
927
928         status = ath10k_wmi_wait_for_unified_ready(ar);
929         if (status <= 0) {
930                 ath10k_err(ar, "wmi unified ready event not received\n");
931                 status = -ETIMEDOUT;
932                 goto err_hif_stop;
933         }
934
935         /* we don't care about HTT in UTF mode */
936         if (mode == ATH10K_FIRMWARE_MODE_NORMAL) {
937                 status = ath10k_htt_setup(&ar->htt);
938                 if (status) {
939                         ath10k_err(ar, "failed to setup htt: %d\n", status);
940                         goto err_hif_stop;
941                 }
942         }
943
944         status = ath10k_debug_start(ar);
945         if (status)
946                 goto err_hif_stop;
947
948         if (test_bit(ATH10K_FW_FEATURE_WMI_10X, ar->fw_features))
949                 ar->free_vdev_map = (1LL << TARGET_10X_NUM_VDEVS) - 1;
950         else
951                 ar->free_vdev_map = (1LL << TARGET_NUM_VDEVS) - 1;
952
953         INIT_LIST_HEAD(&ar->arvifs);
954
955         return 0;
956
957 err_hif_stop:
958         ath10k_hif_stop(ar);
959 err_htt_rx_detach:
960         ath10k_htt_rx_free(&ar->htt);
961 err_htt_tx_detach:
962         ath10k_htt_tx_free(&ar->htt);
963 err_wmi_detach:
964         ath10k_wmi_detach(ar);
965 err:
966         return status;
967 }
968 EXPORT_SYMBOL(ath10k_core_start);
969
970 int ath10k_wait_for_suspend(struct ath10k *ar, u32 suspend_opt)
971 {
972         int ret;
973
974         reinit_completion(&ar->target_suspend);
975
976         ret = ath10k_wmi_pdev_suspend_target(ar, suspend_opt);
977         if (ret) {
978                 ath10k_warn(ar, "could not suspend target (%d)\n", ret);
979                 return ret;
980         }
981
982         ret = wait_for_completion_timeout(&ar->target_suspend, 1 * HZ);
983
984         if (ret == 0) {
985                 ath10k_warn(ar, "suspend timed out - target pause event never came\n");
986                 return -ETIMEDOUT;
987         }
988
989         return 0;
990 }
991
992 void ath10k_core_stop(struct ath10k *ar)
993 {
994         lockdep_assert_held(&ar->conf_mutex);
995
996         /* try to suspend target */
997         if (ar->state != ATH10K_STATE_RESTARTING &&
998             ar->state != ATH10K_STATE_UTF)
999                 ath10k_wait_for_suspend(ar, WMI_PDEV_SUSPEND_AND_DISABLE_INTR);
1000
1001         ath10k_debug_stop(ar);
1002         ath10k_hif_stop(ar);
1003         ath10k_htt_tx_free(&ar->htt);
1004         ath10k_htt_rx_free(&ar->htt);
1005         ath10k_wmi_detach(ar);
1006 }
1007 EXPORT_SYMBOL(ath10k_core_stop);
1008
1009 /* mac80211 manages fw/hw initialization through start/stop hooks. However in
1010  * order to know what hw capabilities should be advertised to mac80211 it is
1011  * necessary to load the firmware (and tear it down immediately since start
1012  * hook will try to init it again) before registering */
1013 static int ath10k_core_probe_fw(struct ath10k *ar)
1014 {
1015         struct bmi_target_info target_info;
1016         int ret = 0;
1017
1018         ret = ath10k_hif_power_up(ar);
1019         if (ret) {
1020                 ath10k_err(ar, "could not start pci hif (%d)\n", ret);
1021                 return ret;
1022         }
1023
1024         memset(&target_info, 0, sizeof(target_info));
1025         ret = ath10k_bmi_get_target_info(ar, &target_info);
1026         if (ret) {
1027                 ath10k_err(ar, "could not get target info (%d)\n", ret);
1028                 ath10k_hif_power_down(ar);
1029                 return ret;
1030         }
1031
1032         ar->target_version = target_info.version;
1033         ar->hw->wiphy->hw_version = target_info.version;
1034
1035         ret = ath10k_init_hw_params(ar);
1036         if (ret) {
1037                 ath10k_err(ar, "could not get hw params (%d)\n", ret);
1038                 ath10k_hif_power_down(ar);
1039                 return ret;
1040         }
1041
1042         ret = ath10k_core_fetch_firmware_files(ar);
1043         if (ret) {
1044                 ath10k_err(ar, "could not fetch firmware files (%d)\n", ret);
1045                 ath10k_hif_power_down(ar);
1046                 return ret;
1047         }
1048
1049         ath10k_core_init_max_sta_count(ar);
1050
1051         mutex_lock(&ar->conf_mutex);
1052
1053         ret = ath10k_core_start(ar, ATH10K_FIRMWARE_MODE_NORMAL);
1054         if (ret) {
1055                 ath10k_err(ar, "could not init core (%d)\n", ret);
1056                 ath10k_core_free_firmware_files(ar);
1057                 ath10k_hif_power_down(ar);
1058                 mutex_unlock(&ar->conf_mutex);
1059                 return ret;
1060         }
1061
1062         ath10k_print_driver_info(ar);
1063         ath10k_core_stop(ar);
1064
1065         mutex_unlock(&ar->conf_mutex);
1066
1067         ath10k_hif_power_down(ar);
1068         return 0;
1069 }
1070
1071 static int ath10k_core_check_chip_id(struct ath10k *ar)
1072 {
1073         u32 hw_revision = MS(ar->chip_id, SOC_CHIP_ID_REV);
1074
1075         ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot chip_id 0x%08x hw_revision 0x%x\n",
1076                    ar->chip_id, hw_revision);
1077
1078         /* Check that we are not using hw1.0 (some of them have same pci id
1079          * as hw2.0) before doing anything else as ath10k crashes horribly
1080          * due to missing hw1.0 workarounds. */
1081         switch (hw_revision) {
1082         case QCA988X_HW_1_0_CHIP_ID_REV:
1083                 ath10k_err(ar, "ERROR: qca988x hw1.0 is not supported\n");
1084                 return -EOPNOTSUPP;
1085
1086         case QCA988X_HW_2_0_CHIP_ID_REV:
1087                 /* known hardware revision, continue normally */
1088                 return 0;
1089
1090         default:
1091                 ath10k_warn(ar, "Warning: hardware revision unknown (0x%x), expect problems\n",
1092                             ar->chip_id);
1093                 return 0;
1094         }
1095
1096         return 0;
1097 }
1098
1099 static void ath10k_core_register_work(struct work_struct *work)
1100 {
1101         struct ath10k *ar = container_of(work, struct ath10k, register_work);
1102         int status;
1103
1104         status = ath10k_core_probe_fw(ar);
1105         if (status) {
1106                 ath10k_err(ar, "could not probe fw (%d)\n", status);
1107                 goto err;
1108         }
1109
1110         status = ath10k_mac_register(ar);
1111         if (status) {
1112                 ath10k_err(ar, "could not register to mac80211 (%d)\n", status);
1113                 goto err_release_fw;
1114         }
1115
1116         status = ath10k_debug_register(ar);
1117         if (status) {
1118                 ath10k_err(ar, "unable to initialize debugfs\n");
1119                 goto err_unregister_mac;
1120         }
1121
1122         status = ath10k_spectral_create(ar);
1123         if (status) {
1124                 ath10k_err(ar, "failed to initialize spectral\n");
1125                 goto err_debug_destroy;
1126         }
1127
1128         set_bit(ATH10K_FLAG_CORE_REGISTERED, &ar->dev_flags);
1129         return;
1130
1131 err_debug_destroy:
1132         ath10k_debug_destroy(ar);
1133 err_unregister_mac:
1134         ath10k_mac_unregister(ar);
1135 err_release_fw:
1136         ath10k_core_free_firmware_files(ar);
1137 err:
1138         /* TODO: It's probably a good idea to release device from the driver
1139          * but calling device_release_driver() here will cause a deadlock.
1140          */
1141         return;
1142 }
1143
1144 int ath10k_core_register(struct ath10k *ar, u32 chip_id)
1145 {
1146         int status;
1147
1148         ar->chip_id = chip_id;
1149
1150         status = ath10k_core_check_chip_id(ar);
1151         if (status) {
1152                 ath10k_err(ar, "Unsupported chip id 0x%08x\n", ar->chip_id);
1153                 return status;
1154         }
1155
1156         queue_work(ar->workqueue, &ar->register_work);
1157
1158         return 0;
1159 }
1160 EXPORT_SYMBOL(ath10k_core_register);
1161
1162 void ath10k_core_unregister(struct ath10k *ar)
1163 {
1164         cancel_work_sync(&ar->register_work);
1165
1166         if (!test_bit(ATH10K_FLAG_CORE_REGISTERED, &ar->dev_flags))
1167                 return;
1168
1169         /* Stop spectral before unregistering from mac80211 to remove the
1170          * relayfs debugfs file cleanly. Otherwise the parent debugfs tree
1171          * would be already be free'd recursively, leading to a double free.
1172          */
1173         ath10k_spectral_destroy(ar);
1174
1175         /* We must unregister from mac80211 before we stop HTC and HIF.
1176          * Otherwise we will fail to submit commands to FW and mac80211 will be
1177          * unhappy about callback failures. */
1178         ath10k_mac_unregister(ar);
1179
1180         ath10k_testmode_destroy(ar);
1181
1182         ath10k_core_free_firmware_files(ar);
1183
1184         ath10k_debug_unregister(ar);
1185 }
1186 EXPORT_SYMBOL(ath10k_core_unregister);
1187
1188 struct ath10k *ath10k_core_create(size_t priv_size, struct device *dev,
1189                                   enum ath10k_bus bus,
1190                                   const struct ath10k_hif_ops *hif_ops)
1191 {
1192         struct ath10k *ar;
1193         int ret;
1194
1195         ar = ath10k_mac_create(priv_size);
1196         if (!ar)
1197                 return NULL;
1198
1199         ar->ath_common.priv = ar;
1200         ar->ath_common.hw = ar->hw;
1201
1202         ar->p2p = !!ath10k_p2p;
1203         ar->dev = dev;
1204
1205         ar->hif.ops = hif_ops;
1206         ar->hif.bus = bus;
1207
1208         init_completion(&ar->scan.started);
1209         init_completion(&ar->scan.completed);
1210         init_completion(&ar->scan.on_channel);
1211         init_completion(&ar->target_suspend);
1212
1213         init_completion(&ar->install_key_done);
1214         init_completion(&ar->vdev_setup_done);
1215
1216         INIT_DELAYED_WORK(&ar->scan.timeout, ath10k_scan_timeout_work);
1217
1218         ar->workqueue = create_singlethread_workqueue("ath10k_wq");
1219         if (!ar->workqueue)
1220                 goto err_free_mac;
1221
1222         mutex_init(&ar->conf_mutex);
1223         spin_lock_init(&ar->data_lock);
1224
1225         INIT_LIST_HEAD(&ar->peers);
1226         init_waitqueue_head(&ar->peer_mapping_wq);
1227         init_waitqueue_head(&ar->htt.empty_tx_wq);
1228         init_waitqueue_head(&ar->wmi.tx_credits_wq);
1229
1230         init_completion(&ar->offchan_tx_completed);
1231         INIT_WORK(&ar->offchan_tx_work, ath10k_offchan_tx_work);
1232         skb_queue_head_init(&ar->offchan_tx_queue);
1233
1234         INIT_WORK(&ar->wmi_mgmt_tx_work, ath10k_mgmt_over_wmi_tx_work);
1235         skb_queue_head_init(&ar->wmi_mgmt_tx_queue);
1236
1237         INIT_WORK(&ar->register_work, ath10k_core_register_work);
1238         INIT_WORK(&ar->restart_work, ath10k_core_restart);
1239
1240         ret = ath10k_debug_create(ar);
1241         if (ret)
1242                 goto err_free_wq;
1243
1244         return ar;
1245
1246 err_free_wq:
1247         destroy_workqueue(ar->workqueue);
1248
1249 err_free_mac:
1250         ath10k_mac_destroy(ar);
1251
1252         return NULL;
1253 }
1254 EXPORT_SYMBOL(ath10k_core_create);
1255
1256 void ath10k_core_destroy(struct ath10k *ar)
1257 {
1258         flush_workqueue(ar->workqueue);
1259         destroy_workqueue(ar->workqueue);
1260
1261         ath10k_debug_destroy(ar);
1262         ath10k_mac_destroy(ar);
1263 }
1264 EXPORT_SYMBOL(ath10k_core_destroy);
1265
1266 MODULE_AUTHOR("Qualcomm Atheros");
1267 MODULE_DESCRIPTION("Core module for QCA988X PCIe devices.");
1268 MODULE_LICENSE("Dual BSD/GPL");