aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/ath/ath10k/bmi.c
blob: 1a2ef51b69d91f4335beff63e5b781136cd4ff95 (plain) (blame)
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
/*
 * Copyright (c) 2005-2011 Atheros Communications Inc.
 * Copyright (c) 2011-2013 Qualcomm Atheros, Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

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

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

	if (ar->bmi.done_sent) {
		ath10k_dbg(ATH10K_DBG_CORE, "%s skipped\n", __func__);
		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("unable to write to the device: %d\n", ret);
		return ret;
	}

	ath10k_dbg(ATH10K_DBG_CORE, "BMI done\n");
	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;

	if (ar->bmi.done_sent) {
		ath10k_warn("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("unable to get target info from device\n");
		return ret;
	}

	if (resplen < sizeof(resp.get_target_info)) {
		ath10k_warn("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;
}

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;

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

	ath10k_dbg(ATH10K_DBG_CORE,
		   "%s: (device: 0x%p, address: 0x%x, length: %d)\n",
		   __func__, ar, address, length);

	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("unable to read from the device\n");
			return ret;
		}

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

	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;

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

	ath10k_dbg(ATH10K_DBG_CORE,
		   "%s: (device: 0x%p, address: 0x%x, length: %d)\n",
		   __func__, ar, address, length);

	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("unable to write to the device\n");
			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)
{
	struct bmi_cmd cmd;
	union bmi_resp resp;
	u32 cmdlen = sizeof(cmd.id) + sizeof(cmd.execute);
	u32 resplen = sizeof(resp.execute);
	int ret;

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

	ath10k_dbg(ATH10K_DBG_CORE,
		   "%s: (device: 0x%p, address: 0x%x, param: %d)\n",
		   __func__, ar, address, *param);

	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("unable to read from the device\n");
		return ret;
	}

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

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

	if (ar->bmi.done_sent) {
		ath10k_warn("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("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;

	if (ar->bmi.done_sent) {
		ath10k_warn("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("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;

	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);

	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;
}