summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/ath/ath10k/bmi.c
blob: af6546572df26b5e43fe819987d46dc5ffc032a7 (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
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
// SPDX-License-Identifier: ISC
/*
 * Copyright (c) 2005-2011 Atheros Communications Inc.
 * Copyright (c) 2011-2014,2016-2017 Qualcomm Atheros, Inc.
 */

#include "bmi.h"
#include "hif.h"
#include "debug.h"
#include "htc.h"
#include "hw.h"

void ath10k_bmi_start(struct ath10k *ar)
{
	ath10k_dbg(ar, ATH10K_DBG_BMI, "bmi start\n");

	ar->bmi.done_sent = false;
}
EXPORT_SYMBOL(ath10k_bmi_start);

int ath10k_bmi_done(struct ath10k *ar)
{
	struct bmi_cmd cmd;
	u32 cmdlen = sizeof(cmd.id) + sizeof(cmd.done);
	int ret;

	ath10k_dbg(ar, ATH10K_DBG_BMI, "bmi done\n");

	if (ar->bmi.done_sent) {
		ath10k_dbg(ar, ATH10K_DBG_BMI, "bmi skipped\n");
		return 0;
	}

	ar->bmi.done_sent = true;
	cmd.id = __cpu_to_le32(BMI_DONE);

	ret = ath10k_hif_exchange_bmi_msg(ar, &cmd, cmdlen, NULL, NULL);
	if (ret) {
		ath10k_warn(ar, "unable to write to the device: %d\n", ret);
		return ret;
	}

	return 0;
}

int ath10k_bmi_get_target_info(struct ath10k *ar,
			       struct bmi_target_info *target_info)
{
	struct bmi_cmd cmd;
	union bmi_resp resp;
	u32 cmdlen = sizeof(cmd.id) + sizeof(cmd.get_target_info);
	u32 resplen = sizeof(resp.get_target_info);
	int ret;

	ath10k_dbg(ar, ATH10K_DBG_BMI, "bmi get target info\n");

	if (ar->bmi.done_sent) {
		ath10k_warn(ar, "BMI Get Target Info Command disallowed\n");
		return -EBUSY;
	}

	cmd.id = __cpu_to_le32(BMI_GET_TARGET_INFO);

	ret = ath10k_hif_exchange_bmi_msg(ar, &cmd, cmdlen, &resp, &resplen);
	if (ret) {
		ath10k_warn(ar, "unable to get target info from device\n");
		return ret;
	}

	if (resplen < sizeof(resp.get_target_info)) {
		ath10k_warn(ar, "invalid get_target_info response length (%d)\n",
			    resplen);
		return -EIO;
	}

	target_info->version = __le32_to_cpu(resp.get_target_info.version);
	target_info->type    = __le32_to_cpu(resp.get_target_info.type);

	return 0;
}

#define TARGET_VERSION_SENTINAL 0xffffffffu

int ath10k_bmi_get_target_info_sdio(struct ath10k *ar,
				    struct bmi_target_info *target_info)
{
	struct bmi_cmd cmd;
	union bmi_resp resp;
	u32 cmdlen = sizeof(cmd.id) + sizeof(cmd.get_target_info);
	u32 resplen, ver_len;
	__le32 tmp;
	int ret;

	ath10k_dbg(ar, ATH10K_DBG_BMI, "bmi get target info SDIO\n");

	if (ar->bmi.done_sent) {
		ath10k_warn(ar, "BMI Get Target Info Command disallowed\n");
		return -EBUSY;
	}

	cmd.id = __cpu_to_le32(BMI_GET_TARGET_INFO);

	/* Step 1: Read 4 bytes of the target info and check if it is
	 * the special sentinel version word or the first word in the
	 * version response.
	 */
	resplen = sizeof(u32);
	ret = ath10k_hif_exchange_bmi_msg(ar, &cmd, cmdlen, &tmp, &resplen);
	if (ret) {
		ath10k_warn(ar, "unable to read from device\n");
		return ret;
	}

	/* Some SDIO boards have a special sentinel byte before the real
	 * version response.
	 */
	if (__le32_to_cpu(tmp) == TARGET_VERSION_SENTINAL) {
		/* Step 1b: Read the version length */
		resplen = sizeof(u32);
		ret = ath10k_hif_exchange_bmi_msg(ar, NULL, 0, &tmp,
						  &resplen);
		if (ret) {
			ath10k_warn(ar, "unable to read from device\n");
			return ret;
		}
	}

	ver_len = __le32_to_cpu(tmp);

	/* Step 2: Check the target info length */
	if (ver_len != sizeof(resp.get_target_info)) {
		ath10k_warn(ar, "Unexpected target info len: %u. Expected: %zu\n",
			    ver_len, sizeof(resp.get_target_info));
		return -EINVAL;
	}

	/* Step 3: Read the rest of the version response */
	resplen = sizeof(resp.get_target_info) - sizeof(u32);
	ret = ath10k_hif_exchange_bmi_msg(ar, NULL, 0,
					  &resp.get_target_info.version,
					  &resplen);
	if (ret) {
		ath10k_warn(ar, "unable to read from device\n");
		return ret;
	}

	target_info->version = __le32_to_cpu(resp.get_target_info.version);
	target_info->type    = __le32_to_cpu(resp.get_target_info.type);

	return 0;
}

int ath10k_bmi_read_memory(struct ath10k *ar,
			   u32 address, void *buffer, u32 length)
{
	struct bmi_cmd cmd;
	union bmi_resp resp;
	u32 cmdlen = sizeof(cmd.id) + sizeof(cmd.read_mem);
	u32 rxlen;
	int ret;

	ath10k_dbg(ar, ATH10K_DBG_BMI, "bmi read address 0x%x length %d\n",
		   address, length);

	if (ar->bmi.done_sent) {
		ath10k_warn(ar, "command disallowed\n");
		return -EBUSY;
	}

	while (length) {
		rxlen = min_t(u32, length, BMI_MAX_DATA_SIZE);

		cmd.id            = __cpu_to_le32(BMI_READ_MEMORY);
		cmd.read_mem.addr = __cpu_to_le32(address);
		cmd.read_mem.len  = __cpu_to_le32(rxlen);

		ret = ath10k_hif_exchange_bmi_msg(ar, &cmd, cmdlen,
						  &resp, &rxlen);
		if (ret) {
			ath10k_warn(ar, "unable to read from the device (%d)\n",
				    ret);
			return ret;
		}

		memcpy(buffer, resp.read_mem.payload, rxlen);
		address += rxlen;
		buffer  += rxlen;
		length  -= rxlen;
	}

	return 0;
}
EXPORT_SYMBOL(ath10k_bmi_read_memory);

int ath10k_bmi_write_soc_reg(struct ath10k *ar, u32 address, u32 reg_val)
{
	struct bmi_cmd cmd;
	u32 cmdlen = sizeof(cmd.id) + sizeof(cmd.write_soc_reg);
	int ret;

	ath10k_dbg(ar, ATH10K_DBG_BMI,
		   "bmi write soc register 0x%08x val 0x%08x\n",
		   address, reg_val);

	if (ar->bmi.done_sent) {
		ath10k_warn(ar, "bmi write soc register command in progress\n");
		return -EBUSY;
	}

	cmd.id = __cpu_to_le32(BMI_WRITE_SOC_REGISTER);
	cmd.write_soc_reg.addr = __cpu_to_le32(address);
	cmd.write_soc_reg.value = __cpu_to_le32(reg_val);

	ret = ath10k_hif_exchange_bmi_msg(ar, &cmd, cmdlen, NULL, NULL);
	if (ret) {
		ath10k_warn(ar, "Unable to write soc register to device: %d\n",
			    ret);
		return ret;
	}

	return 0;
}

int ath10k_bmi_read_soc_reg(struct ath10k *ar, u32 address, u32 *reg_val)
{
	struct bmi_cmd cmd;
	union bmi_resp resp;
	u32 cmdlen = sizeof(cmd.id) + sizeof(cmd.read_soc_reg);
	u32 resplen = sizeof(resp.read_soc_reg);
	int ret;

	ath10k_dbg(ar, ATH10K_DBG_BMI, "bmi read soc register 0x%08x\n",
		   address);

	if (ar->bmi.done_sent) {
		ath10k_warn(ar, "bmi read soc register command in progress\n");
		return -EBUSY;
	}

	cmd.id = __cpu_to_le32(BMI_READ_SOC_REGISTER);
	cmd.read_soc_reg.addr = __cpu_to_le32(address);

	ret = ath10k_hif_exchange_bmi_msg(ar, &cmd, cmdlen, &resp, &resplen);
	if (ret) {
		ath10k_warn(ar, "Unable to read soc register from device: %d\n",
			    ret);
		return ret;
	}

	*reg_val = __le32_to_cpu(resp.read_soc_reg.value);

	ath10k_dbg(ar, ATH10K_DBG_BMI, "bmi read soc register value 0x%08x\n",
		   *reg_val);

	return 0;
}

int ath10k_bmi_write_memory(struct ath10k *ar,
			    u32 address, const void *buffer, u32 length)
{
	struct bmi_cmd cmd;
	u32 hdrlen = sizeof(cmd.id) + sizeof(cmd.write_mem);
	u32 txlen;
	int ret;

	ath10k_dbg(ar, ATH10K_DBG_BMI, "bmi write address 0x%x length %d\n",
		   address, length);

	if (ar->bmi.done_sent) {
		ath10k_warn(ar, "command disallowed\n");
		return -EBUSY;
	}

	while (length) {
		txlen = min(length, BMI_MAX_DATA_SIZE - hdrlen);

		/* copy before roundup to avoid reading beyond buffer*/
		memcpy(cmd.write_mem.payload, buffer, txlen);
		txlen = roundup(txlen, 4);

		cmd.id             = __cpu_to_le32(BMI_WRITE_MEMORY);
		cmd.write_mem.addr = __cpu_to_le32(address);
		cmd.write_mem.len  = __cpu_to_le32(txlen);

		ret = ath10k_hif_exchange_bmi_msg(ar, &cmd, hdrlen + txlen,
						  NULL, NULL);
		if (ret) {
			ath10k_warn(ar, "unable to write to the device (%d)\n",
				    ret);
			return ret;
		}

		/* fixup roundup() so `length` zeroes out for last chunk */
		txlen = min(txlen, length);

		address += txlen;
		buffer  += txlen;
		length  -= txlen;
	}

	return 0;
}

int ath10k_bmi_execute(struct ath10k *ar, u32 address, u32 param, u32 *result)
{
	struct bmi_cmd cmd;
	union bmi_resp resp;
	u32 cmdlen = sizeof(cmd.id) + sizeof(cmd.execute);
	u32 resplen = sizeof(resp.execute);
	int ret;

	ath10k_dbg(ar, ATH10K_DBG_BMI, "bmi execute address 0x%x param 0x%x\n",
		   address, param);

	if (ar->bmi.done_sent) {
		ath10k_warn(ar, "command disallowed\n");
		return -EBUSY;
	}

	cmd.id            = __cpu_to_le32(BMI_EXECUTE);
	cmd.execute.addr  = __cpu_to_le32(address);
	cmd.execute.param = __cpu_to_le32(param);

	ret = ath10k_hif_exchange_bmi_msg(ar, &cmd, cmdlen, &resp, &resplen);
	if (ret) {
		ath10k_warn(ar, "unable to read from the device\n");
		return ret;
	}

	if (resplen < sizeof(resp.execute)) {
		ath10k_warn(ar, "invalid execute response length (%d)\n",
			    resplen);
		return -EIO;
	}

	*result = __le32_to_cpu(resp.execute.result);

	ath10k_dbg(ar, ATH10K_DBG_BMI, "bmi execute result 0x%x\n", *result);

	return 0;
}

static int ath10k_bmi_lz_data_large(struct ath10k *ar, const void *buffer, u32 length)
{
	struct bmi_cmd *cmd;
	u32 hdrlen = sizeof(cmd->id) + sizeof(cmd->lz_data);
	u32 txlen;
	int ret;
	size_t buf_len;

	ath10k_dbg(ar, ATH10K_DBG_BMI, "large bmi lz data buffer 0x%pK length %d\n",
		   buffer, length);

	if (ar->bmi.done_sent) {
		ath10k_warn(ar, "command disallowed\n");
		return -EBUSY;
	}

	buf_len = sizeof(*cmd) + BMI_MAX_LARGE_DATA_SIZE - BMI_MAX_DATA_SIZE;
	cmd = kzalloc(buf_len, GFP_KERNEL);
	if (!cmd)
		return -ENOMEM;

	while (length) {
		txlen = min(length, BMI_MAX_LARGE_DATA_SIZE - hdrlen);

		WARN_ON_ONCE(txlen & 3);

		cmd->id          = __cpu_to_le32(BMI_LZ_DATA);
		cmd->lz_data.len = __cpu_to_le32(txlen);
		memcpy(cmd->lz_data.payload, buffer, txlen);

		ret = ath10k_hif_exchange_bmi_msg(ar, cmd, hdrlen + txlen,
						  NULL, NULL);
		if (ret) {
			ath10k_warn(ar, "unable to write to the device\n");
			kfree(cmd);
			return ret;
		}

		buffer += txlen;
		length -= txlen;
	}

	kfree(cmd);

	return 0;
}

int ath10k_bmi_lz_data(struct ath10k *ar, const void *buffer, u32 length)
{
	struct bmi_cmd cmd;
	u32 hdrlen = sizeof(cmd.id) + sizeof(cmd.lz_data);
	u32 txlen;
	int ret;

	ath10k_dbg(ar, ATH10K_DBG_BMI, "bmi lz data buffer 0x%pK length %d\n",
		   buffer, length);

	if (ar->bmi.done_sent) {
		ath10k_warn(ar, "command disallowed\n");
		return -EBUSY;
	}

	while (length) {
		txlen = min(length, BMI_MAX_DATA_SIZE - hdrlen);

		WARN_ON_ONCE(txlen & 3);

		cmd.id          = __cpu_to_le32(BMI_LZ_DATA);
		cmd.lz_data.len = __cpu_to_le32(txlen);
		memcpy(cmd.lz_data.payload, buffer, txlen);

		ret = ath10k_hif_exchange_bmi_msg(ar, &cmd, hdrlen + txlen,
						  NULL, NULL);
		if (ret) {
			ath10k_warn(ar, "unable to write to the device\n");
			return ret;
		}

		buffer += txlen;
		length -= txlen;
	}

	return 0;
}

int ath10k_bmi_lz_stream_start(struct ath10k *ar, u32 address)
{
	struct bmi_cmd cmd;
	u32 cmdlen = sizeof(cmd.id) + sizeof(cmd.lz_start);
	int ret;

	ath10k_dbg(ar, ATH10K_DBG_BMI, "bmi lz stream start address 0x%x\n",
		   address);

	if (ar->bmi.done_sent) {
		ath10k_warn(ar, "command disallowed\n");
		return -EBUSY;
	}

	cmd.id            = __cpu_to_le32(BMI_LZ_STREAM_START);
	cmd.lz_start.addr = __cpu_to_le32(address);

	ret = ath10k_hif_exchange_bmi_msg(ar, &cmd, cmdlen, NULL, NULL);
	if (ret) {
		ath10k_warn(ar, "unable to Start LZ Stream to the device\n");
		return ret;
	}

	return 0;
}

int ath10k_bmi_fast_download(struct ath10k *ar,
			     u32 address, const void *buffer, u32 length)
{
	u8 trailer[4] = {};
	u32 head_len = rounddown(length, 4);
	u32 trailer_len = length - head_len;
	int ret;

	ath10k_dbg(ar, ATH10K_DBG_BMI,
		   "bmi fast download address 0x%x buffer 0x%pK length %d\n",
		   address, buffer, length);

	ret = ath10k_bmi_lz_stream_start(ar, address);
	if (ret)
		return ret;

	/* copy the last word into a zero padded buffer */
	if (trailer_len > 0)
		memcpy(trailer, buffer + head_len, trailer_len);

	if (ar->hw_params.bmi_large_size_download)
		ret = ath10k_bmi_lz_data_large(ar, buffer, head_len);
	else
		ret = ath10k_bmi_lz_data(ar, buffer, head_len);

	if (ret)
		return ret;

	if (trailer_len > 0)
		ret = ath10k_bmi_lz_data(ar, trailer, 4);

	if (ret != 0)
		return ret;

	/*
	 * Close compressed stream and open a new (fake) one.
	 * This serves mainly to flush Target caches.
	 */
	ret = ath10k_bmi_lz_stream_start(ar, 0x00);

	return ret;
}

int ath10k_bmi_set_start(struct ath10k *ar, u32 address)
{
	struct bmi_cmd cmd;
	u32 cmdlen = sizeof(cmd.id) + sizeof(cmd.set_app_start);
	int ret;

	if (ar->bmi.done_sent) {
		ath10k_warn(ar, "bmi set start command disallowed\n");
		return -EBUSY;
	}

	cmd.id = __cpu_to_le32(BMI_SET_APP_START);
	cmd.set_app_start.addr = __cpu_to_le32(address);

	ret = ath10k_hif_exchange_bmi_msg(ar, &cmd, cmdlen, NULL, NULL);
	if (ret) {
		ath10k_warn(ar, "unable to set start to the device:%d\n", ret);
		return ret;
	}

	return 0;
}