aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/uwb/i1480/dfu/mac.c
blob: 694d0daf88aba1594bcc0d259e01fc4e89e6f137 (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
/*
 * Intel Wireless UWB Link 1480
 * MAC Firmware upload implementation
 *
 * Copyright (C) 2005-2006 Intel Corporation
 * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 *
 *
 * Implementation of the code for parsing the firmware file (extract
 * the headers and binary code chunks) in the fw_*() functions. The
 * code to upload pre and mac firmwares is the same, so it uses a
 * common entry point in __mac_fw_upload(), which uses the i1480
 * function pointers to push the firmware to the device.
 */
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/uwb.h>
#include "i1480-dfu.h"

/*
 * Descriptor for a continuous segment of MAC fw data
 */
struct fw_hdr {
	unsigned long address;
	size_t length;
	const u32 *bin;
	struct fw_hdr *next;
};


/* Free a chain of firmware headers */
static
void fw_hdrs_free(struct fw_hdr *hdr)
{
	struct fw_hdr *next;

	while (hdr) {
		next = hdr->next;
		kfree(hdr);
		hdr = next;
	}
}


/* Fill a firmware header descriptor from a memory buffer */
static
int fw_hdr_load(struct i1480 *i1480, struct fw_hdr *hdr, unsigned hdr_cnt,
		const char *_data, const u32 *data_itr, const u32 *data_top)
{
	size_t hdr_offset =  (const char *) data_itr - _data;
	size_t remaining_size = (void *) data_top - (void *) data_itr;
	if (data_itr + 2 > data_top) {
		dev_err(i1480->dev, "fw hdr #%u/%zu: EOF reached in header at "
		       "offset %zu, limit %zu\n",
		       hdr_cnt, hdr_offset,
		       (const char *) data_itr + 2 - _data,
		       (const char *) data_top - _data);
		return -EINVAL;
	}
	hdr->next = NULL;
	hdr->address = le32_to_cpu(*data_itr++);
	hdr->length = le32_to_cpu(*data_itr++);
	hdr->bin = data_itr;
	if (hdr->length > remaining_size) {
		dev_err(i1480->dev, "fw hdr #%u/%zu: EOF reached in data; "
		       "chunk too long (%zu bytes), only %zu left\n",
		       hdr_cnt, hdr_offset, hdr->length, remaining_size);
		return -EINVAL;
	}
	return 0;
}


/**
 * Get a buffer where the firmware is supposed to be and create a
 * chain of headers linking them together.
 *
 * @phdr: where to place the pointer to the first header (headers link
 *        to the next via the @hdr->next ptr); need to free the whole
 *        chain when done.
 *
 * @_data: Pointer to the data buffer.
 *
 * @_data_size: Size of the data buffer (bytes); data size has to be a
 *              multiple of 4. Function will fail if not.
 *
 * Goes over the whole binary blob; reads the first chunk and creates
 * a fw hdr from it (which points to where the data is in @_data and
 * the length of the chunk); then goes on to the next chunk until
 * done. Each header is linked to the next.
 */
static
int fw_hdrs_load(struct i1480 *i1480, struct fw_hdr **phdr,
		 const char *_data, size_t data_size)
{
	int result;
	unsigned hdr_cnt = 0;
	u32 *data = (u32 *) _data, *data_itr, *data_top;
	struct fw_hdr *hdr, **prev_hdr = phdr;

	result = -EINVAL;
	/* Check size is ok and pointer is aligned */
	if (data_size % sizeof(u32) != 0)
		goto error;
	if ((unsigned long) _data % sizeof(u16) != 0)
		goto error;
	*phdr = NULL;
	data_itr = data;
	data_top = (u32 *) (_data + data_size);
	while (data_itr < data_top) {
		result = -ENOMEM;
		hdr = kmalloc(sizeof(*hdr), GFP_KERNEL);
		if (hdr == NULL) {
			dev_err(i1480->dev, "Cannot allocate fw header "
			       "for chunk #%u\n", hdr_cnt);
			goto error_alloc;
		}
		result = fw_hdr_load(i1480, hdr, hdr_cnt,
				     _data, data_itr, data_top);
		if (result < 0)
			goto error_load;
		data_itr += 2 + hdr->length;
		*prev_hdr = hdr;
		prev_hdr = &hdr->next;
		hdr_cnt++;
	};
	*prev_hdr = NULL;
	return 0;

error_load:
	kfree(hdr);
error_alloc:
	fw_hdrs_free(*phdr);
error:
	return result;
}


/**
 * Compares a chunk of fw with one in the devices's memory
 *
 * @i1480:     Device instance
 * @hdr:     Pointer to the firmware chunk
 * @returns: 0 if equal, < 0 errno on error. If > 0, it is the offset
 *           where the difference was found (plus one).
 *
 * Kind of dirty and simplistic, but does the trick in both the PCI
 * and USB version. We do a quick[er] memcmp(), and if it fails, we do
 * a byte-by-byte to find the offset.
 */
static
ssize_t i1480_fw_cmp(struct i1480 *i1480, struct fw_hdr *hdr)
{
	ssize_t result = 0;
	u32 src_itr = 0, cnt;
	size_t size = hdr->length*sizeof(hdr->bin[0]);
	size_t chunk_size;
	u8 *bin = (u8 *) hdr->bin;

	while (size > 0) {
		chunk_size = size < i1480->buf_size ? size : i1480->buf_size;
		result = i1480->read(i1480, hdr->address + src_itr, chunk_size);
		if (result < 0) {
			dev_err(i1480->dev, "error reading for verification: "
				"%zd\n", result);
			goto error;
		}
		if (memcmp(i1480->cmd_buf, bin + src_itr, result)) {
			u8 *buf = i1480->cmd_buf;
			for (cnt = 0; cnt < result; cnt++)
				if (bin[src_itr + cnt] != buf[cnt]) {
					dev_err(i1480->dev, "byte failed at "
						"src_itr %u cnt %u [0x%02x "
						"vs 0x%02x]\n", src_itr, cnt,
						bin[src_itr + cnt], buf[cnt]);
					result = src_itr + cnt + 1;
					goto cmp_failed;
				}
		}
		src_itr += result;
		size -= result;
	}
	result = 0;
error:
cmp_failed:
	return result;
}


/**
 * Writes firmware headers to the device.
 *
 * @prd:     PRD instance
 * @hdr:     Processed firmware
 * @returns: 0 if ok, < 0 errno on error.
 */
static
int mac_fw_hdrs_push(struct i1480 *i1480, struct fw_hdr *hdr,
		     const char *fw_name, const char *fw_tag)
{
	struct device *dev = i1480->dev;
	ssize_t result = 0;
	struct fw_hdr *hdr_itr;
	int verif_retry_count;

	/* Now, header by header, push them to the hw */
	for (hdr_itr = hdr; hdr_itr != NULL; hdr_itr = hdr_itr->next) {
		verif_retry_count = 0;
retry:
		dev_dbg(dev, "fw chunk (%zu @ 0x%08lx)\n",
			hdr_itr->length * sizeof(hdr_itr->bin[0]),
			hdr_itr->address);
		result = i1480->write(i1480, hdr_itr->address, hdr_itr->bin,
				    hdr_itr->length*sizeof(hdr_itr->bin[0]));
		if (result < 0) {
			dev_err(dev, "%s fw '%s': write failed (%zuB @ 0x%lx):"
				" %zd\n", fw_tag, fw_name,
				hdr_itr->length * sizeof(hdr_itr->bin[0]),
				hdr_itr->address, result);
			break;
		}
		result = i1480_fw_cmp(i1480, hdr_itr);
		if (result < 0) {
			dev_err(dev, "%s fw '%s': verification read "
				"failed (%zuB @ 0x%lx): %zd\n",
				fw_tag, fw_name,
				hdr_itr->length * sizeof(hdr_itr->bin[0]),
				hdr_itr->address, result);
			break;
		}
		if (result > 0) {	/* Offset where it failed + 1 */
			result--;
			dev_err(dev, "%s fw '%s': WARNING: verification "
				"failed at 0x%lx: retrying\n",
				fw_tag, fw_name, hdr_itr->address + result);
			if (++verif_retry_count < 3)
				goto retry;	/* write this block again! */
			dev_err(dev, "%s fw '%s': verification failed at 0x%lx: "
				"tried %d times\n", fw_tag, fw_name,
				hdr_itr->address + result, verif_retry_count);
			result = -EINVAL;
			break;
		}
	}
	return result;
}


/** Puts the device in firmware upload mode.*/
static
int mac_fw_upload_enable(struct i1480 *i1480)
{
	int result;
	u32 reg = 0x800000c0;
	u32 *buffer = (u32 *)i1480->cmd_buf;

	if (i1480->hw_rev > 1)
		reg = 0x8000d0d4;
	result = i1480->read(i1480, reg, sizeof(u32));
	if (result < 0)
		goto error_cmd;
	*buffer &= ~i1480_FW_UPLOAD_MODE_MASK;
	result = i1480->write(i1480, reg, buffer, sizeof(u32));
	if (result < 0)
		goto error_cmd;
	return 0;
error_cmd:
	dev_err(i1480->dev, "can't enable fw upload mode: %d\n", result);
	return result;
}


/** Gets the device out of firmware upload mode. */
static
int mac_fw_upload_disable(struct i1480 *i1480)
{
	int result;
	u32 reg = 0x800000c0;
	u32 *buffer = (u32 *)i1480->cmd_buf;

	if (i1480->hw_rev > 1)
		reg = 0x8000d0d4;
	result = i1480->read(i1480, reg, sizeof(u32));
	if (result < 0)
		goto error_cmd;
	*buffer |= i1480_FW_UPLOAD_MODE_MASK;
	result = i1480->write(i1480, reg, buffer, sizeof(u32));
	if (result < 0)
		goto error_cmd;
	return 0;
error_cmd:
	dev_err(i1480->dev, "can't disable fw upload mode: %d\n", result);
	return result;
}



/**
 * Generic function for uploading a MAC firmware.
 *
 * @i1480:     Device instance
 * @fw_name: Name of firmware file to upload.
 * @fw_tag:  Name of the firmware type (for messages)
 *           [eg: MAC, PRE]
 * @do_wait: Wait for device to emit initialization done message (0
 *           for PRE fws, 1 for MAC fws).
 * @returns: 0 if ok, < 0 errno on error.
 */
static
int __mac_fw_upload(struct i1480 *i1480, const char *fw_name,
		    const char *fw_tag)
{
	int result;
	const struct firmware *fw;
	struct fw_hdr *fw_hdrs;

	result = request_firmware(&fw, fw_name, i1480->dev);
	if (result < 0)	/* Up to caller to complain on -ENOENT */
		goto out;
	result = fw_hdrs_load(i1480, &fw_hdrs, fw->data, fw->size);
	if (result < 0) {
		dev_err(i1480->dev, "%s fw '%s': failed to parse firmware "
			"file: %d\n", fw_tag, fw_name, result);
		goto out_release;
	}
	result = mac_fw_upload_enable(i1480);
	if (result < 0)
		goto out_hdrs_release;
	result = mac_fw_hdrs_push(i1480, fw_hdrs, fw_name, fw_tag);
	mac_fw_upload_disable(i1480);
out_hdrs_release:
	if (result >= 0)
		dev_info(i1480->dev, "%s fw '%s': uploaded\n", fw_tag, fw_name);
	else
		dev_err(i1480->dev, "%s fw '%s': failed to upload (%d), "
			"power cycle device\n", fw_tag, fw_name, result);
	fw_hdrs_free(fw_hdrs);
out_release:
	release_firmware(fw);
out:
	return result;
}


/**
 * Upload a pre-PHY firmware
 *
 */
int i1480_pre_fw_upload(struct i1480 *i1480)
{
	int result;
	result = __mac_fw_upload(i1480, i1480->pre_fw_name, "PRE");
	if (result == 0)
		msleep(400);
	return result;
}


/**
 * Reset a the MAC and PHY
 *
 * @i1480:     Device's instance
 * @returns: 0 if ok, < 0 errno code on error
 *
 * We put the command on kmalloc'ed memory as some arches cannot do
 * USB from the stack. The reply event is copied from an stage buffer,
 * so it can be in the stack. See WUSB1.0[8.6.2.4] for more details.
 *
 * We issue the reset to make sure the UWB controller reinits the PHY;
 * this way we can now if the PHY init went ok.
 */
static
int i1480_cmd_reset(struct i1480 *i1480)
{
	int result;
	struct uwb_rccb *cmd = (void *) i1480->cmd_buf;
	struct i1480_evt_reset {
		struct uwb_rceb rceb;
		u8 bResultCode;
	} __attribute__((packed)) *reply = (void *) i1480->evt_buf;

	result = -ENOMEM;
	cmd->bCommandType = UWB_RC_CET_GENERAL;
	cmd->wCommand = cpu_to_le16(UWB_RC_CMD_RESET);
	reply->rceb.bEventType = UWB_RC_CET_GENERAL;
	reply->rceb.wEvent = UWB_RC_CMD_RESET;
	result = i1480_cmd(i1480, "RESET", sizeof(*cmd), sizeof(*reply));
	if (result < 0)
		goto out;
	if (reply->bResultCode != UWB_RC_RES_SUCCESS) {
		dev_err(i1480->dev, "RESET: command execution failed: %u\n",
			reply->bResultCode);
		result = -EIO;
	}
out:
	return result;

}


/* Wait for the MAC FW to start running */
static
int i1480_fw_is_running_q(struct i1480 *i1480)
{
	int cnt = 0;
	int result;
	u32 *val = (u32 *) i1480->cmd_buf;

	for (cnt = 0; cnt < 10; cnt++) {
		msleep(100);
		result = i1480->read(i1480, 0x80080000, 4);
		if (result < 0) {
			dev_err(i1480->dev, "Can't read 0x8008000: %d\n", result);
			goto out;
		}
		if (*val == 0x55555555UL)	/* fw running? cool */
			goto out;
	}
	dev_err(i1480->dev, "Timed out waiting for fw to start\n");
	result = -ETIMEDOUT;
out:
	return result;

}


/**
 * Upload MAC firmware, wait for it to start
 *
 * @i1480:     Device instance
 * @fw_name: Name of the file that contains the firmware
 *
 * This has to be called after the pre fw has been uploaded (if
 * there is any).
 */
int i1480_mac_fw_upload(struct i1480 *i1480)
{
	int result = 0, deprecated_name = 0;
	struct i1480_rceb *rcebe = (void *) i1480->evt_buf;

	result = __mac_fw_upload(i1480, i1480->mac_fw_name, "MAC");
	if (result == -ENOENT) {
		result = __mac_fw_upload(i1480, i1480->mac_fw_name_deprecate,
					 "MAC");
		deprecated_name = 1;
	}
	if (result < 0)
		return result;
	if (deprecated_name == 1)
		dev_warn(i1480->dev,
			 "WARNING: firmware file name %s is deprecated, "
			 "please rename to %s\n",
			 i1480->mac_fw_name_deprecate, i1480->mac_fw_name);
	result = i1480_fw_is_running_q(i1480);
	if (result < 0)
		goto error_fw_not_running;
	result = i1480->rc_setup ? i1480->rc_setup(i1480) : 0;
	if (result < 0) {
		dev_err(i1480->dev, "Cannot setup after MAC fw upload: %d\n",
			result);
		goto error_setup;
	}
	result = i1480->wait_init_done(i1480);	/* wait init'on */
	if (result < 0) {
		dev_err(i1480->dev, "MAC fw '%s': Initialization timed out "
			"(%d)\n", i1480->mac_fw_name, result);
		goto error_init_timeout;
	}
	/* verify we got the right initialization done event */
	if (i1480->evt_result != sizeof(*rcebe)) {
		dev_err(i1480->dev, "MAC fw '%s': initialization event returns "
			"wrong size (%zu bytes vs %zu needed)\n",
			i1480->mac_fw_name, i1480->evt_result, sizeof(*rcebe));
		goto error_size;
	}
	result = -EIO;
	if (i1480_rceb_check(i1480, &rcebe->rceb, NULL, 0, i1480_CET_VS1,
			     i1480_EVT_RM_INIT_DONE) < 0) {
		dev_err(i1480->dev, "wrong initialization event 0x%02x/%04x/%02x "
			"received; expected 0x%02x/%04x/00\n",
			rcebe->rceb.bEventType, le16_to_cpu(rcebe->rceb.wEvent),
			rcebe->rceb.bEventContext, i1480_CET_VS1,
			i1480_EVT_RM_INIT_DONE);
		goto error_init_timeout;
	}
	result = i1480_cmd_reset(i1480);
	if (result < 0)
		dev_err(i1480->dev, "MAC fw '%s': MBOA reset failed (%d)\n",
			i1480->mac_fw_name, result);
error_fw_not_running:
error_init_timeout:
error_size:
error_setup:
	return result;
}