aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/wireless/brcm80211/brcmsmac/otp.c
blob: f1ca12625860427a74e2011cf7ebb4ad614e1dd1 (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
/*
 * Copyright (c) 2010 Broadcom Corporation
 *
 * 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 <linux/io.h>
#include <linux/errno.h>
#include <linux/string.h>

#include <brcm_hw_ids.h>
#include <chipcommon.h>
#include "aiutils.h"
#include "otp.h"

#define OTPS_GUP_MASK		0x00000f00
#define OTPS_GUP_SHIFT		8
/* h/w subregion is programmed */
#define OTPS_GUP_HW		0x00000100
/* s/w subregion is programmed */
#define OTPS_GUP_SW		0x00000200
/* chipid/pkgopt subregion is programmed */
#define OTPS_GUP_CI		0x00000400
/* fuse subregion is programmed */
#define OTPS_GUP_FUSE		0x00000800

/* Fields in otpprog in rev >= 21 */
#define OTPP_COL_MASK		0x000000ff
#define OTPP_COL_SHIFT		0
#define OTPP_ROW_MASK		0x0000ff00
#define OTPP_ROW_SHIFT		8
#define OTPP_OC_MASK		0x0f000000
#define OTPP_OC_SHIFT		24
#define OTPP_READERR		0x10000000
#define OTPP_VALUE_MASK		0x20000000
#define OTPP_VALUE_SHIFT	29
#define OTPP_START_BUSY		0x80000000
#define	OTPP_READ		0x40000000

/* Opcodes for OTPP_OC field */
#define OTPPOC_READ		0
#define OTPPOC_BIT_PROG		1
#define OTPPOC_VERIFY		3
#define OTPPOC_INIT		4
#define OTPPOC_SET		5
#define OTPPOC_RESET		6
#define OTPPOC_OCST		7
#define OTPPOC_ROW_LOCK		8
#define OTPPOC_PRESCN_TEST	9

#define OTPTYPE_IPX(ccrev)	((ccrev) == 21 || (ccrev) >= 23)

#define OTPP_TRIES	10000000	/* # of tries for OTPP */

#define MAXNUMRDES		9	/* Maximum OTP redundancy entries */

/* Fixed size subregions sizes in words */
#define OTPGU_CI_SZ		2

struct otpinfo;

/* OTP function struct */
struct otp_fn_s {
	int (*init)(struct si_pub *sih, struct otpinfo *oi);
	int (*read_region)(struct otpinfo *oi, int region, u16 *data,
			   uint *wlen);
};

struct otpinfo {
	struct bcma_device *core; /* chipc core */
	const struct otp_fn_s *fn;	/* OTP functions */
	struct si_pub *sih;		/* Saved sb handle */

	/* IPX OTP section */
	u16 wsize;		/* Size of otp in words */
	u16 rows;		/* Geometry */
	u16 cols;		/* Geometry */
	u32 status;		/* Flag bits (lock/prog/rv).
				 * (Reflected only when OTP is power cycled)
				 */
	u16 hwbase;		/* hardware subregion offset */
	u16 hwlim;		/* hardware subregion boundary */
	u16 swbase;		/* software subregion offset */
	u16 swlim;		/* software subregion boundary */
	u16 fbase;		/* fuse subregion offset */
	u16 flim;		/* fuse subregion boundary */
	int otpgu_base;		/* offset to General Use Region */
};

/* OTP layout */
/* CC revs 21, 24 and 27 OTP General Use Region word offset */
#define REVA4_OTPGU_BASE	12

/* CC revs 23, 25, 26, 28 and above OTP General Use Region word offset */
#define REVB8_OTPGU_BASE	20

/* CC rev 36 OTP General Use Region word offset */
#define REV36_OTPGU_BASE	12

/* Subregion word offsets in General Use region */
#define OTPGU_HSB_OFF		0
#define OTPGU_SFB_OFF		1
#define OTPGU_CI_OFF		2
#define OTPGU_P_OFF		3
#define OTPGU_SROM_OFF		4

/* Flag bit offsets in General Use region  */
#define OTPGU_HWP_OFF		60
#define OTPGU_SWP_OFF		61
#define OTPGU_CIP_OFF		62
#define OTPGU_FUSEP_OFF		63
#define OTPGU_CIP_MSK		0x4000
#define OTPGU_P_MSK		0xf000
#define OTPGU_P_SHIFT		(OTPGU_HWP_OFF % 16)

/* OTP Size */
#define OTP_SZ_FU_324		((roundup(324, 8))/8)	/* 324 bits */
#define OTP_SZ_FU_288		(288/8)	/* 288 bits */
#define OTP_SZ_FU_216		(216/8)	/* 216 bits */
#define OTP_SZ_FU_72		(72/8)	/* 72 bits */
#define OTP_SZ_CHECKSUM		(16/8)	/* 16 bits */
#define OTP4315_SWREG_SZ	178	/* 178 bytes */
#define OTP_SZ_FU_144		(144/8)	/* 144 bits */

static u16
ipxotp_otpr(struct otpinfo *oi, uint wn)
{
	return bcma_read16(oi->core,
			   CHIPCREGOFFS(sromotp[wn]));
}

/*
 * Calculate max HW/SW region byte size by subtracting fuse region
 * and checksum size, osizew is oi->wsize (OTP size - GU size) in words
 */
static int ipxotp_max_rgnsz(struct si_pub *sih, int osizew)
{
	int ret = 0;

	switch (ai_get_chip_id(sih)) {
	case BCM43224_CHIP_ID:
	case BCM43225_CHIP_ID:
		ret = osizew * 2 - OTP_SZ_FU_72 - OTP_SZ_CHECKSUM;
		break;
	case BCM4313_CHIP_ID:
		ret = osizew * 2 - OTP_SZ_FU_72 - OTP_SZ_CHECKSUM;
		break;
	default:
		break;	/* Don't know about this chip */
	}

	return ret;
}

static void _ipxotp_init(struct otpinfo *oi)
{
	uint k;
	u32 otpp, st;
	int ccrev = ai_get_ccrev(oi->sih);


	/*
	 * record word offset of General Use Region
	 * for various chipcommon revs
	 */
	if (ccrev == 21 || ccrev == 24
	    || ccrev == 27) {
		oi->otpgu_base = REVA4_OTPGU_BASE;
	} else if (ccrev == 36) {
		/*
		 * OTP size greater than equal to 2KB (128 words),
		 * otpgu_base is similar to rev23
		 */
		if (oi->wsize >= 128)
			oi->otpgu_base = REVB8_OTPGU_BASE;
		else
			oi->otpgu_base = REV36_OTPGU_BASE;
	} else if (ccrev == 23 || ccrev >= 25) {
		oi->otpgu_base = REVB8_OTPGU_BASE;
	}

	/* First issue an init command so the status is up to date */
	otpp =
	    OTPP_START_BUSY | ((OTPPOC_INIT << OTPP_OC_SHIFT) & OTPP_OC_MASK);

	bcma_write32(oi->core, CHIPCREGOFFS(otpprog), otpp);
	st = bcma_read32(oi->core, CHIPCREGOFFS(otpprog));
	for (k = 0; (st & OTPP_START_BUSY) && (k < OTPP_TRIES); k++)
		st = bcma_read32(oi->core, CHIPCREGOFFS(otpprog));
	if (k >= OTPP_TRIES)
		return;

	/* Read OTP lock bits and subregion programmed indication bits */
	oi->status = bcma_read32(oi->core, CHIPCREGOFFS(otpstatus));

	if ((ai_get_chip_id(oi->sih) == BCM43224_CHIP_ID)
	    || (ai_get_chip_id(oi->sih) == BCM43225_CHIP_ID)) {
		u32 p_bits;
		p_bits = (ipxotp_otpr(oi, oi->otpgu_base + OTPGU_P_OFF) &
			  OTPGU_P_MSK) >> OTPGU_P_SHIFT;
		oi->status |= (p_bits << OTPS_GUP_SHIFT);
	}

	/*
	 * h/w region base and fuse region limit are fixed to
	 * the top and the bottom of the general use region.
	 * Everything else can be flexible.
	 */
	oi->hwbase = oi->otpgu_base + OTPGU_SROM_OFF;
	oi->hwlim = oi->wsize;
	if (oi->status & OTPS_GUP_HW) {
		oi->hwlim =
		    ipxotp_otpr(oi, oi->otpgu_base + OTPGU_HSB_OFF) / 16;
		oi->swbase = oi->hwlim;
	} else
		oi->swbase = oi->hwbase;

	/* subtract fuse and checksum from beginning */
	oi->swlim = ipxotp_max_rgnsz(oi->sih, oi->wsize) / 2;

	if (oi->status & OTPS_GUP_SW) {
		oi->swlim =
		    ipxotp_otpr(oi, oi->otpgu_base + OTPGU_SFB_OFF) / 16;
		oi->fbase = oi->swlim;
	} else
		oi->fbase = oi->swbase;

	oi->flim = oi->wsize;
}

static int ipxotp_init(struct si_pub *sih, struct otpinfo *oi)
{
	/* Make sure we're running IPX OTP */
	if (!OTPTYPE_IPX(ai_get_ccrev(sih)))
		return -EBADE;

	/* Make sure OTP is not disabled */
	if (ai_is_otp_disabled(sih))
		return -EBADE;

	/* Check for otp size */
	switch ((ai_get_cccaps(sih) & CC_CAP_OTPSIZE) >> CC_CAP_OTPSIZE_SHIFT) {
	case 0:
		/* Nothing there */
		return -EBADE;
	case 1:		/* 32x64 */
		oi->rows = 32;
		oi->cols = 64;
		oi->wsize = 128;
		break;
	case 2:		/* 64x64 */
		oi->rows = 64;
		oi->cols = 64;
		oi->wsize = 256;
		break;
	case 5:		/* 96x64 */
		oi->rows = 96;
		oi->cols = 64;
		oi->wsize = 384;
		break;
	case 7:		/* 16x64 *//* 1024 bits */
		oi->rows = 16;
		oi->cols = 64;
		oi->wsize = 64;
		break;
	default:
		/* Don't know the geometry */
		return -EBADE;
	}

	/* Retrieve OTP region info */
	_ipxotp_init(oi);
	return 0;
}

static int
ipxotp_read_region(struct otpinfo *oi, int region, u16 *data, uint *wlen)
{
	uint base, i, sz;

	/* Validate region selection */
	switch (region) {
	case OTP_HW_RGN:
		sz = (uint) oi->hwlim - oi->hwbase;
		if (!(oi->status & OTPS_GUP_HW)) {
			*wlen = sz;
			return -ENODATA;
		}
		if (*wlen < sz) {
			*wlen = sz;
			return -EOVERFLOW;
		}
		base = oi->hwbase;
		break;
	case OTP_SW_RGN:
		sz = ((uint) oi->swlim - oi->swbase);
		if (!(oi->status & OTPS_GUP_SW)) {
			*wlen = sz;
			return -ENODATA;
		}
		if (*wlen < sz) {
			*wlen = sz;
			return -EOVERFLOW;
		}
		base = oi->swbase;
		break;
	case OTP_CI_RGN:
		sz = OTPGU_CI_SZ;
		if (!(oi->status & OTPS_GUP_CI)) {
			*wlen = sz;
			return -ENODATA;
		}
		if (*wlen < sz) {
			*wlen = sz;
			return -EOVERFLOW;
		}
		base = oi->otpgu_base + OTPGU_CI_OFF;
		break;
	case OTP_FUSE_RGN:
		sz = (uint) oi->flim - oi->fbase;
		if (!(oi->status & OTPS_GUP_FUSE)) {
			*wlen = sz;
			return -ENODATA;
		}
		if (*wlen < sz) {
			*wlen = sz;
			return -EOVERFLOW;
		}
		base = oi->fbase;
		break;
	case OTP_ALL_RGN:
		sz = ((uint) oi->flim - oi->hwbase);
		if (!(oi->status & (OTPS_GUP_HW | OTPS_GUP_SW))) {
			*wlen = sz;
			return -ENODATA;
		}
		if (*wlen < sz) {
			*wlen = sz;
			return -EOVERFLOW;
		}
		base = oi->hwbase;
		break;
	default:
		return -EINVAL;
	}

	/* Read the data */
	for (i = 0; i < sz; i++)
		data[i] = ipxotp_otpr(oi, base + i);

	*wlen = sz;
	return 0;
}

static const struct otp_fn_s ipxotp_fn = {
	(int (*)(struct si_pub *, struct otpinfo *)) ipxotp_init,
	(int (*)(struct otpinfo *, int, u16 *, uint *)) ipxotp_read_region,
};

static int otp_init(struct si_pub *sih, struct otpinfo *oi)
{
	int ret;

	memset(oi, 0, sizeof(struct otpinfo));

	oi->core = ai_findcore(sih, BCMA_CORE_CHIPCOMMON, 0);

	if (OTPTYPE_IPX(ai_get_ccrev(sih)))
		oi->fn = &ipxotp_fn;

	if (oi->fn == NULL)
		return -EBADE;

	oi->sih = sih;

	ret = (oi->fn->init)(sih, oi);

	return ret;
}

int
otp_read_region(struct si_pub *sih, int region, u16 *data, uint *wlen) {
	struct otpinfo otpinfo;
	struct otpinfo *oi = &otpinfo;
	int err = 0;

	if (ai_is_otp_disabled(sih)) {
		err = -EPERM;
		goto out;
	}

	err = otp_init(sih, oi);
	if (err)
		goto out;

	err = ((oi)->fn->read_region)(oi, region, data, wlen);

 out:
	return err;
}