aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/wl12xx/wl1271_boot.c
blob: 0243562630657098d5b3f05802500f5d151c8704 (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
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
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
/*
 * This file is part of wl1271
 *
 * Copyright (C) 2008-2009 Nokia Corporation
 *
 * Contact: Luciano Coelho <luciano.coelho@nokia.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 St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#include <linux/gpio.h>
#include <linux/slab.h>

#include "wl1271_acx.h"
#include "wl1271_reg.h"
#include "wl1271_boot.h"
#include "wl1271_spi.h"
#include "wl1271_io.h"
#include "wl1271_event.h"

static struct wl1271_partition_set part_table[PART_TABLE_LEN] = {
	[PART_DOWN] = {
		.mem = {
			.start = 0x00000000,
			.size  = 0x000177c0
		},
		.reg = {
			.start = REGISTERS_BASE,
			.size  = 0x00008800
		},
		.mem2 = {
			.start = 0x00000000,
			.size  = 0x00000000
		},
		.mem3 = {
			.start = 0x00000000,
			.size  = 0x00000000
		},
	},

	[PART_WORK] = {
		.mem = {
			.start = 0x00040000,
			.size  = 0x00014fc0
		},
		.reg = {
			.start = REGISTERS_BASE,
			.size  = 0x0000a000
		},
		.mem2 = {
			.start = 0x003004f8,
			.size  = 0x00000004
		},
		.mem3 = {
			.start = 0x00040404,
			.size  = 0x00000000
		},
	},

	[PART_DRPW] = {
		.mem = {
			.start = 0x00040000,
			.size  = 0x00014fc0
		},
		.reg = {
			.start = DRPW_BASE,
			.size  = 0x00006000
		},
		.mem2 = {
			.start = 0x00000000,
			.size  = 0x00000000
		},
		.mem3 = {
			.start = 0x00000000,
			.size  = 0x00000000
		}
	}
};

static void wl1271_boot_set_ecpu_ctrl(struct wl1271 *wl, u32 flag)
{
	u32 cpu_ctrl;

	/* 10.5.0 run the firmware (I) */
	cpu_ctrl = wl1271_read32(wl, ACX_REG_ECPU_CONTROL);

	/* 10.5.1 run the firmware (II) */
	cpu_ctrl |= flag;
	wl1271_write32(wl, ACX_REG_ECPU_CONTROL, cpu_ctrl);
}

static void wl1271_boot_fw_version(struct wl1271 *wl)
{
	struct wl1271_static_data static_data;

	wl1271_read(wl, wl->cmd_box_addr, &static_data, sizeof(static_data),
		    false);

	strncpy(wl->chip.fw_ver, static_data.fw_version,
		sizeof(wl->chip.fw_ver));

	/* make sure the string is NULL-terminated */
	wl->chip.fw_ver[sizeof(wl->chip.fw_ver) - 1] = '\0';
}

static int wl1271_boot_upload_firmware_chunk(struct wl1271 *wl, void *buf,
					     size_t fw_data_len, u32 dest)
{
	struct wl1271_partition_set partition;
	int addr, chunk_num, partition_limit;
	u8 *p, *chunk;

	/* whal_FwCtrl_LoadFwImageSm() */

	wl1271_debug(DEBUG_BOOT, "starting firmware upload");

	wl1271_debug(DEBUG_BOOT, "fw_data_len %zd chunk_size %d",
		     fw_data_len, CHUNK_SIZE);

	if ((fw_data_len % 4) != 0) {
		wl1271_error("firmware length not multiple of four");
		return -EIO;
	}

	chunk = kmalloc(CHUNK_SIZE, GFP_KERNEL);
	if (!chunk) {
		wl1271_error("allocation for firmware upload chunk failed");
		return -ENOMEM;
	}

	memcpy(&partition, &part_table[PART_DOWN], sizeof(partition));
	partition.mem.start = dest;
	wl1271_set_partition(wl, &partition);

	/* 10.1 set partition limit and chunk num */
	chunk_num = 0;
	partition_limit = part_table[PART_DOWN].mem.size;

	while (chunk_num < fw_data_len / CHUNK_SIZE) {
		/* 10.2 update partition, if needed */
		addr = dest + (chunk_num + 2) * CHUNK_SIZE;
		if (addr > partition_limit) {
			addr = dest + chunk_num * CHUNK_SIZE;
			partition_limit = chunk_num * CHUNK_SIZE +
				part_table[PART_DOWN].mem.size;
			partition.mem.start = addr;
			wl1271_set_partition(wl, &partition);
		}

		/* 10.3 upload the chunk */
		addr = dest + chunk_num * CHUNK_SIZE;
		p = buf + chunk_num * CHUNK_SIZE;
		memcpy(chunk, p, CHUNK_SIZE);
		wl1271_debug(DEBUG_BOOT, "uploading fw chunk 0x%p to 0x%x",
			     p, addr);
		wl1271_write(wl, addr, chunk, CHUNK_SIZE, false);

		chunk_num++;
	}

	/* 10.4 upload the last chunk */
	addr = dest + chunk_num * CHUNK_SIZE;
	p = buf + chunk_num * CHUNK_SIZE;
	memcpy(chunk, p, fw_data_len % CHUNK_SIZE);
	wl1271_debug(DEBUG_BOOT, "uploading fw last chunk (%zd B) 0x%p to 0x%x",
		     fw_data_len % CHUNK_SIZE, p, addr);
	wl1271_write(wl, addr, chunk, fw_data_len % CHUNK_SIZE, false);

	kfree(chunk);
	return 0;
}

static int wl1271_boot_upload_firmware(struct wl1271 *wl)
{
	u32 chunks, addr, len;
	int ret = 0;
	u8 *fw;

	fw = wl->fw;
	chunks = be32_to_cpup((__be32 *) fw);
	fw += sizeof(u32);

	wl1271_debug(DEBUG_BOOT, "firmware chunks to be uploaded: %u", chunks);

	while (chunks--) {
		addr = be32_to_cpup((__be32 *) fw);
		fw += sizeof(u32);
		len = be32_to_cpup((__be32 *) fw);
		fw += sizeof(u32);

		if (len > 300000) {
			wl1271_info("firmware chunk too long: %u", len);
			return -EINVAL;
		}
		wl1271_debug(DEBUG_BOOT, "chunk %d addr 0x%x len %u",
			     chunks, addr, len);
		ret = wl1271_boot_upload_firmware_chunk(wl, fw, len, addr);
		if (ret != 0)
			break;
		fw += len;
	}

	return ret;
}

static int wl1271_boot_upload_nvs(struct wl1271 *wl)
{
	size_t nvs_len, burst_len;
	int i;
	u32 dest_addr, val;
	u8 *nvs_ptr, *nvs_aligned;

	if (wl->nvs == NULL)
		return -ENODEV;

	/* only the first part of the NVS needs to be uploaded */
	nvs_len = sizeof(wl->nvs->nvs);
	nvs_ptr = (u8 *)wl->nvs->nvs;

	/*
	 * Layout before the actual NVS tables:
	 * 1 byte : burst length.
	 * 2 bytes: destination address.
	 * n bytes: data to burst copy.
	 *
	 * This is ended by a 0 length, then the NVS tables.
	 */

	/* FIXME: Do we need to check here whether the LSB is 1? */
	while (nvs_ptr[0]) {
		burst_len = nvs_ptr[0];
		dest_addr = (nvs_ptr[1] & 0xfe) | ((u32)(nvs_ptr[2] << 8));

		/* FIXME: Due to our new wl1271_translate_reg_addr function,
		   we need to add the REGISTER_BASE to the destination */
		dest_addr += REGISTERS_BASE;

		/* We move our pointer to the data */
		nvs_ptr += 3;

		for (i = 0; i < burst_len; i++) {
			val = (nvs_ptr[0] | (nvs_ptr[1] << 8)
			       | (nvs_ptr[2] << 16) | (nvs_ptr[3] << 24));

			wl1271_debug(DEBUG_BOOT,
				     "nvs burst write 0x%x: 0x%x",
				     dest_addr, val);
			wl1271_write32(wl, dest_addr, val);

			nvs_ptr += 4;
			dest_addr += 4;
		}
	}

	/*
	 * We've reached the first zero length, the first NVS table
	 * is 7 bytes further.
	 */
	nvs_ptr += 7;
	nvs_len -= nvs_ptr - (u8 *)wl->nvs->nvs;
	nvs_len = ALIGN(nvs_len, 4);

	/* FIXME: The driver sets the partition here, but this is not needed,
	   since it sets to the same one as currently in use */
	/* Now we must set the partition correctly */
	wl1271_set_partition(wl, &part_table[PART_WORK]);

	/* Copy the NVS tables to a new block to ensure alignment */
	/* FIXME: We jump 3 more bytes before uploading the NVS.  It seems
	that our NVS files have three extra zeros here.  I'm not sure whether
	the problem is in our NVS generation or we should really jumpt these
	3 bytes here */
	nvs_ptr += 3;

	nvs_aligned = kmemdup(nvs_ptr, nvs_len, GFP_KERNEL); if
	(!nvs_aligned) return -ENOMEM;

	/* And finally we upload the NVS tables */
	/* FIXME: In wl1271, we upload everything at once.
	   No endianness handling needed here?! The ref driver doesn't do
	   anything about it at this point */
	wl1271_write(wl, CMD_MBOX_ADDRESS, nvs_aligned, nvs_len, false);

	kfree(nvs_aligned);
	return 0;
}

static void wl1271_boot_enable_interrupts(struct wl1271 *wl)
{
	enable_irq(wl->irq);
	wl1271_write32(wl, ACX_REG_INTERRUPT_MASK,
		       WL1271_ACX_INTR_ALL & ~(WL1271_INTR_MASK));
	wl1271_write32(wl, HI_CFG, HI_CFG_DEF_VAL);
}

static int wl1271_boot_soft_reset(struct wl1271 *wl)
{
	unsigned long timeout;
	u32 boot_data;

	/* perform soft reset */
	wl1271_write32(wl, ACX_REG_SLV_SOFT_RESET, ACX_SLV_SOFT_RESET_BIT);

	/* SOFT_RESET is self clearing */
	timeout = jiffies + usecs_to_jiffies(SOFT_RESET_MAX_TIME);
	while (1) {
		boot_data = wl1271_read32(wl, ACX_REG_SLV_SOFT_RESET);
		wl1271_debug(DEBUG_BOOT, "soft reset bootdata 0x%x", boot_data);
		if ((boot_data & ACX_SLV_SOFT_RESET_BIT) == 0)
			break;

		if (time_after(jiffies, timeout)) {
			/* 1.2 check pWhalBus->uSelfClearTime if the
			 * timeout was reached */
			wl1271_error("soft reset timeout");
			return -1;
		}

		udelay(SOFT_RESET_STALL_TIME);
	}

	/* disable Rx/Tx */
	wl1271_write32(wl, ENABLE, 0x0);

	/* disable auto calibration on start*/
	wl1271_write32(wl, SPARE_A2, 0xffff);

	return 0;
}

static int wl1271_boot_run_firmware(struct wl1271 *wl)
{
	int loop, ret;
	u32 chip_id, interrupt;

	wl1271_boot_set_ecpu_ctrl(wl, ECPU_CONTROL_HALT);

	chip_id = wl1271_read32(wl, CHIP_ID_B);

	wl1271_debug(DEBUG_BOOT, "chip id after firmware boot: 0x%x", chip_id);

	if (chip_id != wl->chip.id) {
		wl1271_error("chip id doesn't match after firmware boot");
		return -EIO;
	}

	/* wait for init to complete */
	loop = 0;
	while (loop++ < INIT_LOOP) {
		udelay(INIT_LOOP_DELAY);
		interrupt = wl1271_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);

		if (interrupt == 0xffffffff) {
			wl1271_error("error reading hardware complete "
				     "init indication");
			return -EIO;
		}
		/* check that ACX_INTR_INIT_COMPLETE is enabled */
		else if (interrupt & WL1271_ACX_INTR_INIT_COMPLETE) {
			wl1271_write32(wl, ACX_REG_INTERRUPT_ACK,
				       WL1271_ACX_INTR_INIT_COMPLETE);
			break;
		}
	}

	if (loop > INIT_LOOP) {
		wl1271_error("timeout waiting for the hardware to "
			     "complete initialization");
		return -EIO;
	}

	/* get hardware config command mail box */
	wl->cmd_box_addr = wl1271_read32(wl, REG_COMMAND_MAILBOX_PTR);

	/* get hardware config event mail box */
	wl->event_box_addr = wl1271_read32(wl, REG_EVENT_MAILBOX_PTR);

	/* set the working partition to its "running" mode offset */
	wl1271_set_partition(wl, &part_table[PART_WORK]);

	wl1271_debug(DEBUG_MAILBOX, "cmd_box_addr 0x%x event_box_addr 0x%x",
		     wl->cmd_box_addr, wl->event_box_addr);

	wl1271_boot_fw_version(wl);

	/*
	 * in case of full asynchronous mode the firmware event must be
	 * ready to receive event from the command mailbox
	 */

	/* unmask required mbox events  */
	wl->event_mask = BSS_LOSE_EVENT_ID |
		SCAN_COMPLETE_EVENT_ID |
		PS_REPORT_EVENT_ID;

	ret = wl1271_event_unmask(wl);
	if (ret < 0) {
		wl1271_error("EVENT mask setting failed");
		return ret;
	}

	wl1271_event_mbox_config(wl);

	/* firmware startup completed */
	return 0;
}

static int wl1271_boot_write_irq_polarity(struct wl1271 *wl)
{
	u32 polarity;

	polarity = wl1271_top_reg_read(wl, OCP_REG_POLARITY);

	/* We use HIGH polarity, so unset the LOW bit */
	polarity &= ~POLARITY_LOW;
	wl1271_top_reg_write(wl, OCP_REG_POLARITY, polarity);

	return 0;
}

int wl1271_boot(struct wl1271 *wl)
{
	int ret = 0;
	u32 tmp, clk, pause;

	if (REF_CLOCK == 0 || REF_CLOCK == 2 || REF_CLOCK == 4)
		/* ref clk: 19.2/38.4/38.4-XTAL */
		clk = 0x3;
	else if (REF_CLOCK == 1 || REF_CLOCK == 3)
		/* ref clk: 26/52 */
		clk = 0x5;

	if (REF_CLOCK != 0) {
		u16 val;
		/* Set clock type */
		val = wl1271_top_reg_read(wl, OCP_REG_CLK_TYPE);
		val &= FREF_CLK_TYPE_BITS;
		val |= CLK_REQ_PRCM;
		wl1271_top_reg_write(wl, OCP_REG_CLK_TYPE, val);
	} else {
		u16 val;
		/* Set clock polarity */
		val = wl1271_top_reg_read(wl, OCP_REG_CLK_POLARITY);
		val &= FREF_CLK_POLARITY_BITS;
		val |= CLK_REQ_OUTN_SEL;
		wl1271_top_reg_write(wl, OCP_REG_CLK_POLARITY, val);
	}

	wl1271_write32(wl, PLL_PARAMETERS, clk);

	pause = wl1271_read32(wl, PLL_PARAMETERS);

	wl1271_debug(DEBUG_BOOT, "pause1 0x%x", pause);

	pause &= ~(WU_COUNTER_PAUSE_VAL); /* FIXME: This should probably be
					   * WU_COUNTER_PAUSE_VAL instead of
					   * 0x3ff (magic number ).  How does
					   * this work?! */
	pause |= WU_COUNTER_PAUSE_VAL;
	wl1271_write32(wl, WU_COUNTER_PAUSE, pause);

	/* Continue the ELP wake up sequence */
	wl1271_write32(wl, WELP_ARM_COMMAND, WELP_ARM_COMMAND_VAL);
	udelay(500);

	wl1271_set_partition(wl, &part_table[PART_DRPW]);

	/* Read-modify-write DRPW_SCRATCH_START register (see next state)
	   to be used by DRPw FW. The RTRIM value will be added by the FW
	   before taking DRPw out of reset */

	wl1271_debug(DEBUG_BOOT, "DRPW_SCRATCH_START %08x", DRPW_SCRATCH_START);
	clk = wl1271_read32(wl, DRPW_SCRATCH_START);

	wl1271_debug(DEBUG_BOOT, "clk2 0x%x", clk);

	/* 2 */
	clk |= (REF_CLOCK << 1) << 4;
	wl1271_write32(wl, DRPW_SCRATCH_START, clk);

	wl1271_set_partition(wl, &part_table[PART_WORK]);

	/* Disable interrupts */
	wl1271_write32(wl, ACX_REG_INTERRUPT_MASK, WL1271_ACX_INTR_ALL);

	ret = wl1271_boot_soft_reset(wl);
	if (ret < 0)
		goto out;

	/* 2. start processing NVS file */
	ret = wl1271_boot_upload_nvs(wl);
	if (ret < 0)
		goto out;

	/* write firmware's last address (ie. it's length) to
	 * ACX_EEPROMLESS_IND_REG */
	wl1271_debug(DEBUG_BOOT, "ACX_EEPROMLESS_IND_REG");

	wl1271_write32(wl, ACX_EEPROMLESS_IND_REG, ACX_EEPROMLESS_IND_REG);

	tmp = wl1271_read32(wl, CHIP_ID_B);

	wl1271_debug(DEBUG_BOOT, "chip id 0x%x", tmp);

	/* 6. read the EEPROM parameters */
	tmp = wl1271_read32(wl, SCR_PAD2);

	ret = wl1271_boot_write_irq_polarity(wl);
	if (ret < 0)
		goto out;

	/* FIXME: Need to check whether this is really what we want */
	wl1271_write32(wl, ACX_REG_INTERRUPT_MASK,
		       WL1271_ACX_ALL_EVENTS_VECTOR);

	/* WL1271: The reference driver skips steps 7 to 10 (jumps directly
	 * to upload_fw) */

	ret = wl1271_boot_upload_firmware(wl);
	if (ret < 0)
		goto out;

	/* 10.5 start firmware */
	ret = wl1271_boot_run_firmware(wl);
	if (ret < 0)
		goto out;

	/* Enable firmware interrupts now */
	wl1271_boot_enable_interrupts(wl);

	/* set the wl1271 default filters */
	wl->rx_config = WL1271_DEFAULT_RX_CONFIG;
	wl->rx_filter = WL1271_DEFAULT_RX_FILTER;

	wl1271_event_mbox_config(wl);

out:
	return ret;
}