summaryrefslogtreecommitdiff
path: root/src/commonlib/storage/storage.c
blob: f5d1517cbf2e7e50eba8d7fd57469a2b8879cd5b (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
/* This file is part of the coreboot project. */
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * MultiMediaCard (MMC), eMMC and Secure Digital (SD) common code which
 * transitions the card from the standby state to the transfer state.  The
 * common code supports read operations, erase and write operations are in
 * a separate modules.  This code is controller independent.
 */

#include <commonlib/storage.h>
#include "sd_mmc.h"
#include "storage.h"
#include <string.h>

#define DECIMAL_CAPACITY_MULTIPLIER	1000ULL
#define HEX_CAPACITY_MULTIPLIER		1024ULL

struct capacity {
	const char *const units;
	uint64_t bytes;
};

static void display_capacity(struct storage_media *media, int partition_number)
{
	uint64_t capacity;
	uint64_t decimal_divisor;
	const char *decimal_units;
	uint64_t hex_divisor;
	const char *hex_units;
	int index;
	const char *name;
	const char *separator;
	const struct capacity decimal_list[] = {
		{"TB", DECIMAL_CAPACITY_MULTIPLIER * DECIMAL_CAPACITY_MULTIPLIER
			* DECIMAL_CAPACITY_MULTIPLIER
			* DECIMAL_CAPACITY_MULTIPLIER},
		{"GB", DECIMAL_CAPACITY_MULTIPLIER * DECIMAL_CAPACITY_MULTIPLIER
			* DECIMAL_CAPACITY_MULTIPLIER},
		{"MB", DECIMAL_CAPACITY_MULTIPLIER
			* DECIMAL_CAPACITY_MULTIPLIER},
		{"KB", DECIMAL_CAPACITY_MULTIPLIER},
		{"B", 1}
	};
	const struct capacity hex_list[] = {
		{"TiB", HEX_CAPACITY_MULTIPLIER * HEX_CAPACITY_MULTIPLIER
			* HEX_CAPACITY_MULTIPLIER * HEX_CAPACITY_MULTIPLIER},
		{"GiB", HEX_CAPACITY_MULTIPLIER * HEX_CAPACITY_MULTIPLIER
			* HEX_CAPACITY_MULTIPLIER},
		{"MiB", HEX_CAPACITY_MULTIPLIER * HEX_CAPACITY_MULTIPLIER},
		{"KiB", HEX_CAPACITY_MULTIPLIER},
		{"B", 1}
	};

	/* Get the partition name */
	capacity = media->capacity[partition_number];
	name = storage_partition_name(media, partition_number);
	separator = "";
	if (CONFIG(COMMONLIB_STORAGE_MMC) && !IS_SD(media))
		separator = ": ";

	/* Determine the decimal divisor for the capacity */
	for (index = 0; index < ARRAY_SIZE(decimal_list) - 1; index++) {
		if (capacity >= decimal_list[index].bytes)
			break;
	}
	decimal_divisor = decimal_list[index].bytes;
	decimal_units = decimal_list[index].units;

	/* Determine the hex divisor for the capacity */
	for (index = 0; index < ARRAY_SIZE(hex_list) - 1; index++) {
		if (capacity >= hex_list[index].bytes)
			break;
	}
	hex_divisor = hex_list[index].bytes;
	hex_units = hex_list[index].units;

	/* Display the capacity */
	sdhc_debug("%3lld.%03lld %sytes (%3lld.%03lld %sytes)%s%s\n",
		capacity / decimal_divisor,
		(capacity / (decimal_divisor / 1000)) % 1000,
		decimal_units,
		capacity / hex_divisor,
		((capacity / (hex_divisor / 1024)) * 1000 / 1024) % 1000,
		hex_units,
		separator,
		name);
}

void storage_display_setup(struct storage_media *media)
{
	int partition_number;

	/* Display the device info */
	sd_mmc_debug("Man %06x Snr %u ",
	       media->cid[0] >> 24,
	       (((media->cid[2] & 0xffff) << 16) |
		((media->cid[3] >> 16) & 0xffff)));
	sd_mmc_debug("Product %c%c%c%c", media->cid[0] & 0xff,
	       (media->cid[1] >> 24), (media->cid[1] >> 16) & 0xff,
	       (media->cid[1] >> 8) & 0xff);
	if (!IS_SD(media)) /* eMMC product string is longer */
		sd_mmc_debug("%c%c", media->cid[1] & 0xff,
		       (media->cid[2] >> 24) & 0xff);
	sd_mmc_debug(" Revision %d.%d\n", (media->cid[2] >> 20) & 0xf,
	       (media->cid[2] >> 16) & 0xf);

	/* Display the erase block size */
	sdhc_debug("Erase block size: 0x%08x\n", media->erase_blocks
		* media->write_bl_len);

	/* Display the partition capacities */
	if (CONFIG(SDHC_DEBUG)) {
		for (partition_number = 0; partition_number
			< ARRAY_SIZE(media->capacity); partition_number++) {
			if (!media->capacity[partition_number])
				continue;
			display_capacity(media, partition_number);
		}
	}
}

int storage_startup(struct storage_media *media)
{
	int err;
	uint64_t capacity;
	uint64_t cmult, csize;
	struct mmc_command cmd;
	struct sd_mmc_ctrlr *ctrlr = media->ctrlr;

	/* Determine the storage capacity */
	if (media->high_capacity) {
		cmult = 8;
		csize = sd_mmc_extract_uint32_bits(media->csd, 58, 22);
	} else {
		csize = sd_mmc_extract_uint32_bits(media->csd, 54, 12);
		cmult = sd_mmc_extract_uint32_bits(media->csd, 78, 3);
	}
	capacity = (csize + 1) << (cmult + 2);
	capacity *= media->read_bl_len;
	media->capacity[0] = capacity;

	/* Limit the block size to 512 bytes */
	if (media->read_bl_len > 512)
		media->read_bl_len = 512;
	if (media->write_bl_len > 512)
		media->write_bl_len = 512;

	/* Get the erase size in blocks */
	media->erase_blocks =
		(sd_mmc_extract_uint32_bits(media->csd, 47, 3) + 1)
		* (sd_mmc_extract_uint32_bits(media->csd, 42, 5) + 1);

	/* Select the card, and put it into Transfer Mode */
	cmd.cmdidx = MMC_CMD_SELECT_CARD;
	cmd.resp_type = CARD_RSP_R1;
	cmd.cmdarg = media->rca << 16;
	cmd.flags = 0;
	err = ctrlr->send_cmd(ctrlr, &cmd, NULL);
	if (err)
		return err;

	/* Increase the bus frequency */
	if (CONFIG(COMMONLIB_STORAGE_SD) && IS_SD(media))
		err = sd_change_freq(media);
	else if (CONFIG(COMMONLIB_STORAGE_MMC)) {
		err = mmc_change_freq(media);
		if (!err)
			mmc_update_capacity(media);
	}
	if (err)
		return err;

	/* Restrict card's capabilities by what the controller can do */
	media->caps &= ctrlr->caps;

	/* Increase the bus width if possible */
	if (CONFIG(COMMONLIB_STORAGE_SD) && IS_SD(media))
		err = sd_set_bus_width(media);
	else if (CONFIG(COMMONLIB_STORAGE_MMC))
		err = mmc_set_bus_width(media);
	if (err)
		return err;

	/* Display the card setup */
	storage_display_setup(media);
	return 0;
}

int storage_setup_media(struct storage_media *media, struct sd_mmc_ctrlr *ctrlr)
{
	int err;

	memset(media, 0, sizeof(*media));
	media->ctrlr = ctrlr;

	err = sd_mmc_enter_standby(media);
	if (err)
		return err;
	return storage_startup(media);
}

static int storage_read(struct storage_media *media, void *dest, uint32_t start,
	uint32_t block_count)
{
	struct mmc_command cmd;
	struct sd_mmc_ctrlr *ctrlr = media->ctrlr;

	cmd.resp_type = CARD_RSP_R1;
	cmd.flags = 0;

	if (block_count > 1)
		cmd.cmdidx = MMC_CMD_READ_MULTIPLE_BLOCK;
	else
		cmd.cmdidx = MMC_CMD_READ_SINGLE_BLOCK;

	if (media->high_capacity)
		cmd.cmdarg = start;
	else
		cmd.cmdarg = start * media->read_bl_len;

	struct mmc_data data;
	data.dest = dest;
	data.blocks = block_count;
	data.blocksize = media->read_bl_len;
	data.flags = DATA_FLAG_READ;

	if (ctrlr->send_cmd(ctrlr, &cmd, &data))
		return 0;

	if ((block_count > 1) && !(ctrlr->caps
		& DRVR_CAP_AUTO_CMD12)) {
		cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
		cmd.cmdarg = 0;
		cmd.resp_type = CARD_RSP_R1b;
		cmd.flags = CMD_FLAG_IGNORE_INHIBIT;
		if (ctrlr->send_cmd(ctrlr, &cmd, NULL)) {
			sd_mmc_error("Failed to send stop cmd\n");
			return 0;
		}

		/* Waiting for the ready status */
		sd_mmc_send_status(media, SD_MMC_IO_RETRIES);
	}

	return block_count;
}

/////////////////////////////////////////////////////////////////////////////
// BlockDevice utilities and callbacks

int storage_block_setup(struct storage_media *media, uint64_t start,
	uint64_t count, int is_read)
{
	struct sd_mmc_ctrlr *ctrlr = media->ctrlr;
	int partition_number;

	if (count == 0)
		return 0;

	uint32_t bl_len = is_read ? media->read_bl_len :
		media->write_bl_len;

	/* Validate the block range */
	partition_number = media->partition_config & EXT_CSD_PART_ACCESS_MASK;
	if (((start * bl_len) > media->capacity[partition_number])
		|| (((start + count) * bl_len) >
		media->capacity[partition_number])) {
		sd_mmc_error("Block range exceeds device capacity\n");
		return 0;
	}

	/*
	 * CMD16 only applies to single data rate mode, and block
	 * length for double data rate is always 512 bytes.
	 */
	if ((ctrlr->timing == BUS_TIMING_UHS_DDR50) ||
	    (ctrlr->timing == BUS_TIMING_MMC_DDR52) ||
	    (ctrlr->timing == BUS_TIMING_MMC_HS400) ||
	    (ctrlr->timing == BUS_TIMING_MMC_HS400ES))
		return 1;
	if (sd_mmc_set_blocklen(ctrlr, bl_len))
		return 0;

	return 1;
}

uint64_t storage_block_read(struct storage_media *media, uint64_t start,
	uint64_t count, void *buffer)
{
	uint8_t *dest = (uint8_t *)buffer;

	if (storage_block_setup(media, start, count, 1) == 0)
		return 0;

	uint64_t todo = count;
	struct sd_mmc_ctrlr *ctrlr = media->ctrlr;
	do {
		uint32_t cur = (uint32_t)MIN(todo, ctrlr->b_max);
		if (storage_read(media, dest, start, cur) != cur)
			return 0;
		todo -= cur;
		sd_mmc_trace("%s: Got %d blocks, more %d (total %d) to go.\n",
			  __func__, (int)cur, (int)todo, (int)count);
		start += cur;
		dest += cur * media->read_bl_len;
	} while (todo > 0);
	return count;
}

int storage_set_partition(struct storage_media *media,
	unsigned int partition_number)
{
	int err;

	/* Select the partition */
	err = -1;
	if (CONFIG(COMMONLIB_STORAGE_SD) && IS_SD(media))
		err = sd_set_partition(media, partition_number);
	else if (CONFIG(COMMONLIB_STORAGE_MMC))
		err = mmc_set_partition(media, partition_number);
	if (err)
		sd_mmc_error("Invalid partition number!\n");
	return err;
}

const char *storage_partition_name(struct storage_media *media,
	unsigned int partition_number)
{
	const char *name;

	/* Get the partition name */
	name = NULL;
	if (CONFIG(COMMONLIB_STORAGE_SD) && IS_SD(media))
		name = sd_partition_name(media, partition_number);
	else if (CONFIG(COMMONLIB_STORAGE_MMC))
		name = mmc_partition_name(media, partition_number);
	return name;
}

unsigned int storage_get_current_partition(struct storage_media *media)
{
	return media->partition_config & EXT_CSD_PART_ACCESS_MASK;
}