aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/wireless/wl12xx/wl1251_cmd.c
blob: 0320b478bb3f0dfde1fc6cfbee04859fe9b01a35 (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
#include "wl1251_cmd.h"

#include <linux/module.h>
#include <linux/crc7.h>

#include "wl1251.h"
#include "wl1251_reg.h"
#include "wl1251_io.h"
#include "wl1251_ps.h"
#include "wl1251_acx.h"

/**
 * send command to firmware
 *
 * @wl: wl struct
 * @id: command id
 * @buf: buffer containing the command, must work with dma
 * @len: length of the buffer
 */
int wl1251_cmd_send(struct wl1251 *wl, u16 id, void *buf, size_t len)
{
	struct wl1251_cmd_header *cmd;
	unsigned long timeout;
	u32 intr;
	int ret = 0;

	cmd = buf;
	cmd->id = id;
	cmd->status = 0;

	WARN_ON(len % 4 != 0);

	wl1251_mem_write(wl, wl->cmd_box_addr, buf, len);

	wl1251_reg_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_CMD);

	timeout = jiffies + msecs_to_jiffies(WL1251_COMMAND_TIMEOUT);

	intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);
	while (!(intr & WL1251_ACX_INTR_CMD_COMPLETE)) {
		if (time_after(jiffies, timeout)) {
			wl1251_error("command complete timeout");
			ret = -ETIMEDOUT;
			goto out;
		}

		msleep(1);

		intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);
	}

	wl1251_reg_write32(wl, ACX_REG_INTERRUPT_ACK,
			   WL1251_ACX_INTR_CMD_COMPLETE);

out:
	return ret;
}

/**
 * send test command to firmware
 *
 * @wl: wl struct
 * @buf: buffer containing the command, with all headers, must work with dma
 * @len: length of the buffer
 * @answer: is answer needed
 */
int wl1251_cmd_test(struct wl1251 *wl, void *buf, size_t buf_len, u8 answer)
{
	int ret;

	wl1251_debug(DEBUG_CMD, "cmd test");

	ret = wl1251_cmd_send(wl, CMD_TEST, buf, buf_len);

	if (ret < 0) {
		wl1251_warning("TEST command failed");
		return ret;
	}

	if (answer) {
		struct wl1251_command *cmd_answer;

		/*
		 * The test command got in, we can read the answer.
		 * The answer would be a wl1251_command, where the
		 * parameter array contains the actual answer.
		 */
		wl1251_mem_read(wl, wl->cmd_box_addr, buf, buf_len);

		cmd_answer = buf;

		if (cmd_answer->header.status != CMD_STATUS_SUCCESS)
			wl1251_error("TEST command answer error: %d",
				     cmd_answer->header.status);
	}

	return 0;
}

/**
 * read acx from firmware
 *
 * @wl: wl struct
 * @id: acx id
 * @buf: buffer for the response, including all headers, must work with dma
 * @len: lenght of buf
 */
int wl1251_cmd_interrogate(struct wl1251 *wl, u16 id, void *buf, size_t len)
{
	struct acx_header *acx = buf;
	int ret;

	wl1251_debug(DEBUG_CMD, "cmd interrogate");

	acx->id = id;

	/* payload length, does not include any headers */
	acx->len = len - sizeof(*acx);

	ret = wl1251_cmd_send(wl, CMD_INTERROGATE, acx, sizeof(*acx));
	if (ret < 0) {
		wl1251_error("INTERROGATE command failed");
		goto out;
	}

	/* the interrogate command got in, we can read the answer */
	wl1251_mem_read(wl, wl->cmd_box_addr, buf, len);

	acx = buf;
	if (acx->cmd.status != CMD_STATUS_SUCCESS)
		wl1251_error("INTERROGATE command error: %d",
			     acx->cmd.status);

out:
	return ret;
}

/**
 * write acx value to firmware
 *
 * @wl: wl struct
 * @id: acx id
 * @buf: buffer containing acx, including all headers, must work with dma
 * @len: length of buf
 */
int wl1251_cmd_configure(struct wl1251 *wl, u16 id, void *buf, size_t len)
{
	struct acx_header *acx = buf;
	int ret;

	wl1251_debug(DEBUG_CMD, "cmd configure");

	acx->id = id;

	/* payload length, does not include any headers */
	acx->len = len - sizeof(*acx);

	ret = wl1251_cmd_send(wl, CMD_CONFIGURE, acx, len);
	if (ret < 0) {
		wl1251_warning("CONFIGURE command NOK");
		return ret;
	}

	return 0;
}

int wl1251_cmd_vbm(struct wl1251 *wl, u8 identity,
		   void *bitmap, u16 bitmap_len, u8 bitmap_control)
{
	struct wl1251_cmd_vbm_update *vbm;
	int ret;

	wl1251_debug(DEBUG_CMD, "cmd vbm");

	vbm = kzalloc(sizeof(*vbm), GFP_KERNEL);
	if (!vbm) {
		ret = -ENOMEM;
		goto out;
	}

	/* Count and period will be filled by the target */
	vbm->tim.bitmap_ctrl = bitmap_control;
	if (bitmap_len > PARTIAL_VBM_MAX) {
		wl1251_warning("cmd vbm len is %d B, truncating to %d",
			       bitmap_len, PARTIAL_VBM_MAX);
		bitmap_len = PARTIAL_VBM_MAX;
	}
	memcpy(vbm->tim.pvb_field, bitmap, bitmap_len);
	vbm->tim.identity = identity;
	vbm->tim.length = bitmap_len + 3;

	vbm->len = cpu_to_le16(bitmap_len + 5);

	ret = wl1251_cmd_send(wl, CMD_VBM, vbm, sizeof(*vbm));
	if (ret < 0) {
		wl1251_error("VBM command failed");
		goto out;
	}

out:
	kfree(vbm);
	return 0;
}

int wl1251_cmd_data_path(struct wl1251 *wl, u8 channel, bool enable)
{
	struct cmd_enabledisable_path *cmd;
	int ret;
	u16 cmd_rx, cmd_tx;

	wl1251_debug(DEBUG_CMD, "cmd data path");

	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
	if (!cmd) {
		ret = -ENOMEM;
		goto out;
	}

	cmd->channel = channel;

	if (enable) {
		cmd_rx = CMD_ENABLE_RX;
		cmd_tx = CMD_ENABLE_TX;
	} else {
		cmd_rx = CMD_DISABLE_RX;
		cmd_tx = CMD_DISABLE_TX;
	}

	ret = wl1251_cmd_send(wl, cmd_rx, cmd, sizeof(*cmd));
	if (ret < 0) {
		wl1251_error("rx %s cmd for channel %d failed",
			     enable ? "start" : "stop", channel);
		goto out;
	}

	wl1251_debug(DEBUG_BOOT, "rx %s cmd channel %d",
		     enable ? "start" : "stop", channel);

	ret = wl1251_cmd_send(wl, cmd_tx, cmd, sizeof(*cmd));
	if (ret < 0) {
		wl1251_error("tx %s cmd for channel %d failed",
			     enable ? "start" : "stop", channel);
		return ret;
	}

	wl1251_debug(DEBUG_BOOT, "tx %s cmd channel %d",
		     enable ? "start" : "stop", channel);

out:
	kfree(cmd);
	return ret;
}

int wl1251_cmd_join(struct wl1251 *wl, u8 bss_type, u8 channel,
		    u16 beacon_interval, u8 dtim_interval)
{
	struct cmd_join *join;
	int ret, i;
	u8 *bssid;

	join = kzalloc(sizeof(*join), GFP_KERNEL);
	if (!join) {
		ret = -ENOMEM;
		goto out;
	}

	wl1251_debug(DEBUG_CMD, "cmd join%s ch %d %d/%d",
		     bss_type == BSS_TYPE_IBSS ? " ibss" : "",
		     channel, beacon_interval, dtim_interval);

	/* Reverse order BSSID */
	bssid = (u8 *) &join->bssid_lsb;
	for (i = 0; i < ETH_ALEN; i++)
		bssid[i] = wl->bssid[ETH_ALEN - i - 1];

	join->rx_config_options = wl->rx_config;
	join->rx_filter_options = wl->rx_filter;

	/*
	 * FIXME: disable temporarily all filters because after commit
	 * 9cef8737 "mac80211: fix managed mode BSSID handling" broke
	 * association. The filter logic needs to be implemented properly
	 * and once that is done, this hack can be removed.
	 */
	join->rx_config_options = 0;
	join->rx_filter_options = WL1251_DEFAULT_RX_FILTER;

	join->basic_rate_set = RATE_MASK_1MBPS | RATE_MASK_2MBPS |
		RATE_MASK_5_5MBPS | RATE_MASK_11MBPS;

	join->beacon_interval = beacon_interval;
	join->dtim_interval = dtim_interval;
	join->bss_type = bss_type;
	join->channel = channel;
	join->ctrl = JOIN_CMD_CTRL_TX_FLUSH;

	ret = wl1251_cmd_send(wl, CMD_START_JOIN, join, sizeof(*join));
	if (ret < 0) {
		wl1251_error("failed to initiate cmd join");
		goto out;
	}

out:
	kfree(join);
	return ret;
}

int wl1251_cmd_ps_mode(struct wl1251 *wl, u8 ps_mode)
{
	struct wl1251_cmd_ps_params *ps_params = NULL;
	int ret = 0;

	wl1251_debug(DEBUG_CMD, "cmd set ps mode");

	ps_params = kzalloc(sizeof(*ps_params), GFP_KERNEL);
	if (!ps_params) {
		ret = -ENOMEM;
		goto out;
	}

	ps_params->ps_mode = ps_mode;
	ps_params->send_null_data = 1;
	ps_params->retries = 5;
	ps_params->hang_over_period = 128;
	ps_params->null_data_rate = 1; /* 1 Mbps */

	ret = wl1251_cmd_send(wl, CMD_SET_PS_MODE, ps_params,
			      sizeof(*ps_params));
	if (ret < 0) {
		wl1251_error("cmd set_ps_mode failed");
		goto out;
	}

out:
	kfree(ps_params);
	return ret;
}

int wl1251_cmd_read_memory(struct wl1251 *wl, u32 addr, void *answer,
			   size_t len)
{
	struct cmd_read_write_memory *cmd;
	int ret = 0;

	wl1251_debug(DEBUG_CMD, "cmd read memory");

	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
	if (!cmd) {
		ret = -ENOMEM;
		goto out;
	}

	WARN_ON(len > MAX_READ_SIZE);
	len = min_t(size_t, len, MAX_READ_SIZE);

	cmd->addr = addr;
	cmd->size = len;

	ret = wl1251_cmd_send(wl, CMD_READ_MEMORY, cmd, sizeof(*cmd));
	if (ret < 0) {
		wl1251_error("read memory command failed: %d", ret);
		goto out;
	}

	/* the read command got in, we can now read the answer */
	wl1251_mem_read(wl, wl->cmd_box_addr, cmd, sizeof(*cmd));

	if (cmd->header.status != CMD_STATUS_SUCCESS)
		wl1251_error("error in read command result: %d",
			     cmd->header.status);

	memcpy(answer, cmd->value, len);

out:
	kfree(cmd);
	return ret;
}

int wl1251_cmd_template_set(struct wl1251 *wl, u16 cmd_id,
			    void *buf, size_t buf_len)
{
	struct wl1251_cmd_packet_template *cmd;
	size_t cmd_len;
	int ret = 0;

	wl1251_debug(DEBUG_CMD, "cmd template %d", cmd_id);

	WARN_ON(buf_len > WL1251_MAX_TEMPLATE_SIZE);
	buf_len = min_t(size_t, buf_len, WL1251_MAX_TEMPLATE_SIZE);
	cmd_len = ALIGN(sizeof(*cmd) + buf_len, 4);

	cmd = kzalloc(cmd_len, GFP_KERNEL);
	if (!cmd) {
		ret = -ENOMEM;
		goto out;
	}

	cmd->size = cpu_to_le16(buf_len);

	if (buf)
		memcpy(cmd->data, buf, buf_len);

	ret = wl1251_cmd_send(wl, cmd_id, cmd, cmd_len);
	if (ret < 0) {
		wl1251_warning("cmd set_template failed: %d", ret);
		goto out;
	}

out:
	kfree(cmd);
	return ret;
}

int wl1251_cmd_scan(struct wl1251 *wl, u8 *ssid, size_t ssid_len,
		    struct ieee80211_channel *channels[],
		    unsigned int n_channels, unsigned int n_probes)
{
	struct wl1251_cmd_scan *cmd;
	int i, ret = 0;

	wl1251_debug(DEBUG_CMD, "cmd scan");

	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
	if (!cmd)
		return -ENOMEM;

	cmd->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
	cmd->params.rx_filter_options = cpu_to_le32(CFG_RX_PRSP_EN |
						    CFG_RX_MGMT_EN |
						    CFG_RX_BCN_EN);
	cmd->params.scan_options = 0;
	cmd->params.num_channels = n_channels;
	cmd->params.num_probe_requests = n_probes;
	cmd->params.tx_rate = cpu_to_le16(1 << 1); /* 2 Mbps */
	cmd->params.tid_trigger = 0;

	for (i = 0; i < n_channels; i++) {
		cmd->channels[i].min_duration =
			cpu_to_le32(WL1251_SCAN_MIN_DURATION);
		cmd->channels[i].max_duration =
			cpu_to_le32(WL1251_SCAN_MAX_DURATION);
		memset(&cmd->channels[i].bssid_lsb, 0xff, 4);
		memset(&cmd->channels[i].bssid_msb, 0xff, 2);
		cmd->channels[i].early_termination = 0;
		cmd->channels[i].tx_power_att = 0;
		cmd->channels[i].channel = channels[i]->hw_value;
	}

	cmd->params.ssid_len = ssid_len;
	if (ssid)
		memcpy(cmd->params.ssid, ssid, ssid_len);

	ret = wl1251_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd));
	if (ret < 0) {
		wl1251_error("cmd scan failed: %d", ret);
		goto out;
	}

	wl1251_mem_read(wl, wl->cmd_box_addr, cmd, sizeof(*cmd));

	if (cmd->header.status != CMD_STATUS_SUCCESS) {
		wl1251_error("cmd scan status wasn't success: %d",
			     cmd->header.status);
		ret = -EIO;
		goto out;
	}

out:
	kfree(cmd);
	return ret;
}

int wl1251_cmd_trigger_scan_to(struct wl1251 *wl, u32 timeout)
{
	struct wl1251_cmd_trigger_scan_to *cmd;
	int ret;

	wl1251_debug(DEBUG_CMD, "cmd trigger scan to");

	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
	if (!cmd)
		return -ENOMEM;

	cmd->timeout = timeout;

	ret = wl1251_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd));
	if (ret < 0) {
		wl1251_error("cmd trigger scan to failed: %d", ret);
		goto out;
	}

out:
	kfree(cmd);
	return ret;
}