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1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Bluetooth supports for Qualcomm Atheros chips
4 *
5 * Copyright (c) 2015 The Linux Foundation. All rights reserved.
6 */
7 #include <linux/module.h>
8 #include <linux/firmware.h>
9
10 #include <net/bluetooth/bluetooth.h>
11 #include <net/bluetooth/hci_core.h>
12
13 #include "btqca.h"
14
15 #define VERSION "0.1"
16
17 int qca_read_soc_version(struct hci_dev *hdev, struct qca_btsoc_version *ver,
18 enum qca_btsoc_type soc_type)
19 {
20 struct sk_buff *skb;
21 struct edl_event_hdr *edl;
22 char cmd;
23 int err = 0;
24 u8 event_type = HCI_EV_VENDOR;
25 u8 rlen = sizeof(*edl) + sizeof(*ver);
26 u8 rtype = EDL_APP_VER_RES_EVT;
27
28 bt_dev_dbg(hdev, "QCA Version Request");
29
30 /* Unlike other SoC's sending version command response as payload to
31 * VSE event. WCN3991 sends version command response as a payload to
32 * command complete event.
33 */
34 if (soc_type >= QCA_WCN3991) {
35 event_type = 0;
36 rlen += 1;
37 rtype = EDL_PATCH_VER_REQ_CMD;
38 }
39
40 cmd = EDL_PATCH_VER_REQ_CMD;
41 skb = __hci_cmd_sync_ev(hdev, EDL_PATCH_CMD_OPCODE, EDL_PATCH_CMD_LEN,
42 &cmd, event_type, HCI_INIT_TIMEOUT);
43 if (IS_ERR(skb)) {
44 err = PTR_ERR(skb);
45 bt_dev_err(hdev, "Reading QCA version information failed (%d)",
46 err);
47 return err;
48 }
49
50 if (skb->len != rlen) {
51 bt_dev_err(hdev, "QCA Version size mismatch len %d", skb->len);
52 err = -EILSEQ;
53 goto out;
54 }
55
56 edl = (struct edl_event_hdr *)(skb->data);
57 if (!edl) {
58 bt_dev_err(hdev, "QCA TLV with no header");
59 err = -EILSEQ;
60 goto out;
61 }
62
63 if (edl->cresp != EDL_CMD_REQ_RES_EVT ||
64 edl->rtype != rtype) {
65 bt_dev_err(hdev, "QCA Wrong packet received %d %d", edl->cresp,
66 edl->rtype);
67 err = -EIO;
68 goto out;
69 }
70
71 if (soc_type >= QCA_WCN3991)
72 memcpy(ver, edl->data + 1, sizeof(*ver));
73 else
74 memcpy(ver, &edl->data, sizeof(*ver));
75
76 bt_dev_info(hdev, "QCA Product ID :0x%08x",
77 le32_to_cpu(ver->product_id));
78 bt_dev_info(hdev, "QCA SOC Version :0x%08x",
79 le32_to_cpu(ver->soc_id));
80 bt_dev_info(hdev, "QCA ROM Version :0x%08x",
81 le16_to_cpu(ver->rom_ver));
82 bt_dev_info(hdev, "QCA Patch Version:0x%08x",
83 le16_to_cpu(ver->patch_ver));
84
85 if (ver->soc_id == 0 || ver->rom_ver == 0)
86 err = -EILSEQ;
87
88 out:
89 kfree_skb(skb);
90 if (err)
91 bt_dev_err(hdev, "QCA Failed to get version (%d)", err);
92
93 return err;
94 }
95 EXPORT_SYMBOL_GPL(qca_read_soc_version);
96
97 static int qca_send_reset(struct hci_dev *hdev)
98 {
99 struct sk_buff *skb;
100 int err;
101
102 bt_dev_dbg(hdev, "QCA HCI_RESET");
103
104 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
105 if (IS_ERR(skb)) {
106 err = PTR_ERR(skb);
107 bt_dev_err(hdev, "QCA Reset failed (%d)", err);
108 return err;
109 }
110
111 kfree_skb(skb);
112
113 return 0;
114 }
115
116 int qca_send_pre_shutdown_cmd(struct hci_dev *hdev)
117 {
118 struct sk_buff *skb;
119 int err;
120
121 bt_dev_dbg(hdev, "QCA pre shutdown cmd");
122
123 skb = __hci_cmd_sync_ev(hdev, QCA_PRE_SHUTDOWN_CMD, 0,
124 NULL, HCI_EV_CMD_COMPLETE, HCI_INIT_TIMEOUT);
125
126 if (IS_ERR(skb)) {
127 err = PTR_ERR(skb);
128 bt_dev_err(hdev, "QCA preshutdown_cmd failed (%d)", err);
129 return err;
130 }
131
132 kfree_skb(skb);
133
134 return 0;
135 }
136 EXPORT_SYMBOL_GPL(qca_send_pre_shutdown_cmd);
137
138 static void qca_tlv_check_data(struct qca_fw_config *config,
139 const struct firmware *fw, enum qca_btsoc_type soc_type)
140 {
141 const u8 *data;
142 u32 type_len;
143 u16 tag_id, tag_len;
144 int idx, length;
145 struct tlv_type_hdr *tlv;
146 struct tlv_type_patch *tlv_patch;
147 struct tlv_type_nvm *tlv_nvm;
148 uint8_t nvm_baud_rate = config->user_baud_rate;
149
150 tlv = (struct tlv_type_hdr *)fw->data;
151
152 type_len = le32_to_cpu(tlv->type_len);
153 length = (type_len >> 8) & 0x00ffffff;
154
155 BT_DBG("TLV Type\t\t : 0x%x", type_len & 0x000000ff);
156 BT_DBG("Length\t\t : %d bytes", length);
157
158 config->dnld_mode = QCA_SKIP_EVT_NONE;
159 config->dnld_type = QCA_SKIP_EVT_NONE;
160
161 switch (config->type) {
162 case TLV_TYPE_PATCH:
163 tlv_patch = (struct tlv_type_patch *)tlv->data;
164
165 /* For Rome version 1.1 to 3.1, all segment commands
166 * are acked by a vendor specific event (VSE).
167 * For Rome >= 3.2, the download mode field indicates
168 * if VSE is skipped by the controller.
169 * In case VSE is skipped, only the last segment is acked.
170 */
171 config->dnld_mode = tlv_patch->download_mode;
172 config->dnld_type = config->dnld_mode;
173
174 BT_DBG("Total Length : %d bytes",
175 le32_to_cpu(tlv_patch->total_size));
176 BT_DBG("Patch Data Length : %d bytes",
177 le32_to_cpu(tlv_patch->data_length));
178 BT_DBG("Signing Format Version : 0x%x",
179 tlv_patch->format_version);
180 BT_DBG("Signature Algorithm : 0x%x",
181 tlv_patch->signature);
182 BT_DBG("Download mode : 0x%x",
183 tlv_patch->download_mode);
184 BT_DBG("Reserved : 0x%x",
185 tlv_patch->reserved1);
186 BT_DBG("Product ID : 0x%04x",
187 le16_to_cpu(tlv_patch->product_id));
188 BT_DBG("Rom Build Version : 0x%04x",
189 le16_to_cpu(tlv_patch->rom_build));
190 BT_DBG("Patch Version : 0x%04x",
191 le16_to_cpu(tlv_patch->patch_version));
192 BT_DBG("Reserved : 0x%x",
193 le16_to_cpu(tlv_patch->reserved2));
194 BT_DBG("Patch Entry Address : 0x%x",
195 le32_to_cpu(tlv_patch->entry));
196 break;
197
198 case TLV_TYPE_NVM:
199 idx = 0;
200 data = tlv->data;
201 while (idx < length) {
202 tlv_nvm = (struct tlv_type_nvm *)(data + idx);
203
204 tag_id = le16_to_cpu(tlv_nvm->tag_id);
205 tag_len = le16_to_cpu(tlv_nvm->tag_len);
206
207 /* Update NVM tags as needed */
208 switch (tag_id) {
209 case EDL_TAG_ID_HCI:
210 /* HCI transport layer parameters
211 * enabling software inband sleep
212 * onto controller side.
213 */
214 tlv_nvm->data[0] |= 0x80;
215
216 /* UART Baud Rate */
217 if (soc_type >= QCA_WCN3991)
218 tlv_nvm->data[1] = nvm_baud_rate;
219 else
220 tlv_nvm->data[2] = nvm_baud_rate;
221
222 break;
223
224 case EDL_TAG_ID_DEEP_SLEEP:
225 /* Sleep enable mask
226 * enabling deep sleep feature on controller.
227 */
228 tlv_nvm->data[0] |= 0x01;
229
230 break;
231 }
232
233 idx += (sizeof(u16) + sizeof(u16) + 8 + tag_len);
234 }
235 break;
236
237 default:
238 BT_ERR("Unknown TLV type %d", config->type);
239 break;
240 }
241 }
242
243 static int qca_tlv_send_segment(struct hci_dev *hdev, int seg_size,
244 const u8 *data, enum qca_tlv_dnld_mode mode,
245 enum qca_btsoc_type soc_type)
246 {
247 struct sk_buff *skb;
248 struct edl_event_hdr *edl;
249 struct tlv_seg_resp *tlv_resp;
250 u8 cmd[MAX_SIZE_PER_TLV_SEGMENT + 2];
251 int err = 0;
252 u8 event_type = HCI_EV_VENDOR;
253 u8 rlen = (sizeof(*edl) + sizeof(*tlv_resp));
254 u8 rtype = EDL_TVL_DNLD_RES_EVT;
255
256 cmd[0] = EDL_PATCH_TLV_REQ_CMD;
257 cmd[1] = seg_size;
258 memcpy(cmd + 2, data, seg_size);
259
260 if (mode == QCA_SKIP_EVT_VSE_CC || mode == QCA_SKIP_EVT_VSE)
261 return __hci_cmd_send(hdev, EDL_PATCH_CMD_OPCODE, seg_size + 2,
262 cmd);
263
264 /* Unlike other SoC's sending version command response as payload to
265 * VSE event. WCN3991 sends version command response as a payload to
266 * command complete event.
267 */
268 if (soc_type >= QCA_WCN3991) {
269 event_type = 0;
270 rlen = sizeof(*edl);
271 rtype = EDL_PATCH_TLV_REQ_CMD;
272 }
273
274 skb = __hci_cmd_sync_ev(hdev, EDL_PATCH_CMD_OPCODE, seg_size + 2, cmd,
275 event_type, HCI_INIT_TIMEOUT);
276 if (IS_ERR(skb)) {
277 err = PTR_ERR(skb);
278 bt_dev_err(hdev, "QCA Failed to send TLV segment (%d)", err);
279 return err;
280 }
281
282 if (skb->len != rlen) {
283 bt_dev_err(hdev, "QCA TLV response size mismatch");
284 err = -EILSEQ;
285 goto out;
286 }
287
288 edl = (struct edl_event_hdr *)(skb->data);
289 if (!edl) {
290 bt_dev_err(hdev, "TLV with no header");
291 err = -EILSEQ;
292 goto out;
293 }
294
295 if (edl->cresp != EDL_CMD_REQ_RES_EVT || edl->rtype != rtype) {
296 bt_dev_err(hdev, "QCA TLV with error stat 0x%x rtype 0x%x",
297 edl->cresp, edl->rtype);
298 err = -EIO;
299 }
300
301 if (soc_type >= QCA_WCN3991)
302 goto out;
303
304 tlv_resp = (struct tlv_seg_resp *)(edl->data);
305 if (tlv_resp->result) {
306 bt_dev_err(hdev, "QCA TLV with error stat 0x%x rtype 0x%x (0x%x)",
307 edl->cresp, edl->rtype, tlv_resp->result);
308 }
309
310 out:
311 kfree_skb(skb);
312
313 return err;
314 }
315
316 static int qca_inject_cmd_complete_event(struct hci_dev *hdev)
317 {
318 struct hci_event_hdr *hdr;
319 struct hci_ev_cmd_complete *evt;
320 struct sk_buff *skb;
321
322 skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*evt) + 1, GFP_KERNEL);
323 if (!skb)
324 return -ENOMEM;
325
326 hdr = skb_put(skb, sizeof(*hdr));
327 hdr->evt = HCI_EV_CMD_COMPLETE;
328 hdr->plen = sizeof(*evt) + 1;
329
330 evt = skb_put(skb, sizeof(*evt));
331 evt->ncmd = 1;
332 evt->opcode = cpu_to_le16(QCA_HCI_CC_OPCODE);
333
334 skb_put_u8(skb, QCA_HCI_CC_SUCCESS);
335
336 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
337
338 return hci_recv_frame(hdev, skb);
339 }
340
341 static int qca_download_firmware(struct hci_dev *hdev,
342 struct qca_fw_config *config,
343 enum qca_btsoc_type soc_type)
344 {
345 const struct firmware *fw;
346 const u8 *segment;
347 int ret, remain, i = 0;
348
349 bt_dev_info(hdev, "QCA Downloading %s", config->fwname);
350
351 ret = request_firmware(&fw, config->fwname, &hdev->dev);
352 if (ret) {
353 bt_dev_err(hdev, "QCA Failed to request file: %s (%d)",
354 config->fwname, ret);
355 return ret;
356 }
357
358 qca_tlv_check_data(config, fw, soc_type);
359
360 segment = fw->data;
361 remain = fw->size;
362 while (remain > 0) {
363 int segsize = min(MAX_SIZE_PER_TLV_SEGMENT, remain);
364
365 bt_dev_dbg(hdev, "Send segment %d, size %d", i++, segsize);
366
367 remain -= segsize;
368 /* The last segment is always acked regardless download mode */
369 if (!remain || segsize < MAX_SIZE_PER_TLV_SEGMENT)
370 config->dnld_mode = QCA_SKIP_EVT_NONE;
371
372 ret = qca_tlv_send_segment(hdev, segsize, segment,
373 config->dnld_mode, soc_type);
374 if (ret)
375 goto out;
376
377 segment += segsize;
378 }
379
380 /* Latest qualcomm chipsets are not sending a command complete event
381 * for every fw packet sent. They only respond with a vendor specific
382 * event for the last packet. This optimization in the chip will
383 * decrease the BT in initialization time. Here we will inject a command
384 * complete event to avoid a command timeout error message.
385 */
386 if (config->dnld_type == QCA_SKIP_EVT_VSE_CC ||
387 config->dnld_type == QCA_SKIP_EVT_VSE)
388 ret = qca_inject_cmd_complete_event(hdev);
389
390 out:
391 release_firmware(fw);
392
393 return ret;
394 }
395
396 static int qca_disable_soc_logging(struct hci_dev *hdev)
397 {
398 struct sk_buff *skb;
399 u8 cmd[2];
400 int err;
401
402 cmd[0] = QCA_DISABLE_LOGGING_SUB_OP;
403 cmd[1] = 0x00;
404 skb = __hci_cmd_sync_ev(hdev, QCA_DISABLE_LOGGING, sizeof(cmd), cmd,
405 HCI_EV_CMD_COMPLETE, HCI_INIT_TIMEOUT);
406 if (IS_ERR(skb)) {
407 err = PTR_ERR(skb);
408 bt_dev_err(hdev, "QCA Failed to disable soc logging(%d)", err);
409 return err;
410 }
411
412 kfree_skb(skb);
413
414 return 0;
415 }
416
417 int qca_set_bdaddr_rome(struct hci_dev *hdev, const bdaddr_t *bdaddr)
418 {
419 struct sk_buff *skb;
420 u8 cmd[9];
421 int err;
422
423 cmd[0] = EDL_NVM_ACCESS_SET_REQ_CMD;
424 cmd[1] = 0x02; /* TAG ID */
425 cmd[2] = sizeof(bdaddr_t); /* size */
426 memcpy(cmd + 3, bdaddr, sizeof(bdaddr_t));
427 skb = __hci_cmd_sync_ev(hdev, EDL_NVM_ACCESS_OPCODE, sizeof(cmd), cmd,
428 HCI_EV_VENDOR, HCI_INIT_TIMEOUT);
429 if (IS_ERR(skb)) {
430 err = PTR_ERR(skb);
431 bt_dev_err(hdev, "QCA Change address command failed (%d)", err);
432 return err;
433 }
434
435 kfree_skb(skb);
436
437 return 0;
438 }
439 EXPORT_SYMBOL_GPL(qca_set_bdaddr_rome);
440
441 int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
442 enum qca_btsoc_type soc_type, struct qca_btsoc_version ver,
443 const char *firmware_name)
444 {
445 struct qca_fw_config config;
446 int err;
447 u8 rom_ver = 0;
448 u32 soc_ver;
449
450 bt_dev_dbg(hdev, "QCA setup on UART");
451
452 soc_ver = get_soc_ver(ver.soc_id, ver.rom_ver);
453
454 bt_dev_info(hdev, "QCA controller version 0x%08x", soc_ver);
455
456 config.user_baud_rate = baudrate;
457
458 /* Download rampatch file */
459 config.type = TLV_TYPE_PATCH;
460 if (qca_is_wcn399x(soc_type)) {
461 /* Firmware files to download are based on ROM version.
462 * ROM version is derived from last two bytes of soc_ver.
463 */
464 rom_ver = ((soc_ver & 0x00000f00) >> 0x04) |
465 (soc_ver & 0x0000000f);
466 snprintf(config.fwname, sizeof(config.fwname),
467 "qca/crbtfw%02x.tlv", rom_ver);
468 } else if (soc_type == QCA_QCA6390) {
469 rom_ver = ((soc_ver & 0x00000f00) >> 0x04) |
470 (soc_ver & 0x0000000f);
471 snprintf(config.fwname, sizeof(config.fwname),
472 "qca/htbtfw%02x.tlv", rom_ver);
473 } else {
474 snprintf(config.fwname, sizeof(config.fwname),
475 "qca/rampatch_%08x.bin", soc_ver);
476 }
477
478 err = qca_download_firmware(hdev, &config, soc_type);
479 if (err < 0) {
480 bt_dev_err(hdev, "QCA Failed to download patch (%d)", err);
481 return err;
482 }
483
484 /* Give the controller some time to get ready to receive the NVM */
485 msleep(10);
486
487 /* Download NVM configuration */
488 config.type = TLV_TYPE_NVM;
489 if (firmware_name)
490 snprintf(config.fwname, sizeof(config.fwname),
491 "qca/%s", firmware_name);
492 else if (qca_is_wcn399x(soc_type)) {
493 if (ver.soc_id == QCA_WCN3991_SOC_ID) {
494 snprintf(config.fwname, sizeof(config.fwname),
495 "qca/crnv%02xu.bin", rom_ver);
496 } else {
497 snprintf(config.fwname, sizeof(config.fwname),
498 "qca/crnv%02x.bin", rom_ver);
499 }
500 }
501 else if (soc_type == QCA_QCA6390)
502 snprintf(config.fwname, sizeof(config.fwname),
503 "qca/htnv%02x.bin", rom_ver);
504 else
505 snprintf(config.fwname, sizeof(config.fwname),
506 "qca/nvm_%08x.bin", soc_ver);
507
508 err = qca_download_firmware(hdev, &config, soc_type);
509 if (err < 0) {
510 bt_dev_err(hdev, "QCA Failed to download NVM (%d)", err);
511 return err;
512 }
513
514 if (soc_type >= QCA_WCN3991) {
515 err = qca_disable_soc_logging(hdev);
516 if (err < 0)
517 return err;
518 }
519
520 /* Perform HCI reset */
521 err = qca_send_reset(hdev);
522 if (err < 0) {
523 bt_dev_err(hdev, "QCA Failed to run HCI_RESET (%d)", err);
524 return err;
525 }
526
527 bt_dev_info(hdev, "QCA setup on UART is completed");
528
529 return 0;
530 }
531 EXPORT_SYMBOL_GPL(qca_uart_setup);
532
533 int qca_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
534 {
535 struct sk_buff *skb;
536 int err;
537
538 skb = __hci_cmd_sync_ev(hdev, EDL_WRITE_BD_ADDR_OPCODE, 6, bdaddr,
539 HCI_EV_VENDOR, HCI_INIT_TIMEOUT);
540 if (IS_ERR(skb)) {
541 err = PTR_ERR(skb);
542 bt_dev_err(hdev, "QCA Change address cmd failed (%d)", err);
543 return err;
544 }
545
546 kfree_skb(skb);
547
548 return 0;
549 }
550 EXPORT_SYMBOL_GPL(qca_set_bdaddr);
551
552
553 MODULE_AUTHOR("Ben Young Tae Kim <ytkim@qca.qualcomm.com>");
554 MODULE_DESCRIPTION("Bluetooth support for Qualcomm Atheros family ver " VERSION);
555 MODULE_VERSION(VERSION);
556 MODULE_LICENSE("GPL");