1 | // SPDX-License-Identifier: GPL-2.0-only |
---|---|
2 | /* |
3 | * linux/drivers/mmc/core/mmc.c |
4 | * |
5 | * Copyright (C) 2003-2004 Russell King, All Rights Reserved. |
6 | * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved. |
7 | * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved. |
8 | */ |
9 | |
10 | #include <linux/err.h> |
11 | #include <linux/of.h> |
12 | #include <linux/slab.h> |
13 | #include <linux/stat.h> |
14 | #include <linux/string.h> |
15 | #include <linux/pm_runtime.h> |
16 | #include <linux/random.h> |
17 | #include <linux/sysfs.h> |
18 | |
19 | #include <linux/mmc/host.h> |
20 | #include <linux/mmc/card.h> |
21 | #include <linux/mmc/mmc.h> |
22 | |
23 | #include "core.h" |
24 | #include "card.h" |
25 | #include "host.h" |
26 | #include "bus.h" |
27 | #include "mmc_ops.h" |
28 | #include "quirks.h" |
29 | #include "sd_ops.h" |
30 | #include "pwrseq.h" |
31 | |
32 | #define DEFAULT_CMD6_TIMEOUT_MS 500 |
33 | #define MIN_CACHE_EN_TIMEOUT_MS 1600 |
34 | #define CACHE_FLUSH_TIMEOUT_MS 30000 /* 30s */ |
35 | |
36 | enum mmc_poweroff_type { |
37 | MMC_POWEROFF_SUSPEND, |
38 | MMC_POWEROFF_SHUTDOWN, |
39 | MMC_POWEROFF_UNBIND, |
40 | }; |
41 | |
42 | static const unsigned int tran_exp[] = { |
43 | 10000, 100000, 1000000, 10000000, |
44 | 0, 0, 0, 0 |
45 | }; |
46 | |
47 | static const unsigned char tran_mant[] = { |
48 | 0, 10, 12, 13, 15, 20, 25, 30, |
49 | 35, 40, 45, 50, 55, 60, 70, 80, |
50 | }; |
51 | |
52 | static const unsigned int taac_exp[] = { |
53 | 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, |
54 | }; |
55 | |
56 | static const unsigned int taac_mant[] = { |
57 | 0, 10, 12, 13, 15, 20, 25, 30, |
58 | 35, 40, 45, 50, 55, 60, 70, 80, |
59 | }; |
60 | |
61 | /* |
62 | * Given the decoded CSD structure, decode the raw CID to our CID structure. |
63 | */ |
64 | static int mmc_decode_cid(struct mmc_card *card) |
65 | { |
66 | u32 *resp = card->raw_cid; |
67 | |
68 | /* |
69 | * Add the raw card ID (cid) data to the entropy pool. It doesn't |
70 | * matter that not all of it is unique, it's just bonus entropy. |
71 | */ |
72 | add_device_randomness(buf: &card->raw_cid, len: sizeof(card->raw_cid)); |
73 | |
74 | /* |
75 | * The selection of the format here is based upon published |
76 | * specs from SanDisk and from what people have reported. |
77 | */ |
78 | switch (card->csd.mmca_vsn) { |
79 | case 0: /* MMC v1.0 - v1.2 */ |
80 | case 1: /* MMC v1.4 */ |
81 | card->cid.manfid = unstuff_bits(resp, start: 104, size: 24); |
82 | card->cid.prod_name[0] = unstuff_bits(resp, start: 96, size: 8); |
83 | card->cid.prod_name[1] = unstuff_bits(resp, start: 88, size: 8); |
84 | card->cid.prod_name[2] = unstuff_bits(resp, start: 80, size: 8); |
85 | card->cid.prod_name[3] = unstuff_bits(resp, start: 72, size: 8); |
86 | card->cid.prod_name[4] = unstuff_bits(resp, start: 64, size: 8); |
87 | card->cid.prod_name[5] = unstuff_bits(resp, start: 56, size: 8); |
88 | card->cid.prod_name[6] = unstuff_bits(resp, start: 48, size: 8); |
89 | card->cid.hwrev = unstuff_bits(resp, start: 44, size: 4); |
90 | card->cid.fwrev = unstuff_bits(resp, start: 40, size: 4); |
91 | card->cid.serial = unstuff_bits(resp, start: 16, size: 24); |
92 | card->cid.month = unstuff_bits(resp, start: 12, size: 4); |
93 | card->cid.year = unstuff_bits(resp, start: 8, size: 4) + 1997; |
94 | break; |
95 | |
96 | case 2: /* MMC v2.0 - v2.2 */ |
97 | case 3: /* MMC v3.1 - v3.3 */ |
98 | case 4: /* MMC v4 */ |
99 | card->cid.manfid = unstuff_bits(resp, start: 120, size: 8); |
100 | card->cid.oemid = unstuff_bits(resp, start: 104, size: 16); |
101 | card->cid.prod_name[0] = unstuff_bits(resp, start: 96, size: 8); |
102 | card->cid.prod_name[1] = unstuff_bits(resp, start: 88, size: 8); |
103 | card->cid.prod_name[2] = unstuff_bits(resp, start: 80, size: 8); |
104 | card->cid.prod_name[3] = unstuff_bits(resp, start: 72, size: 8); |
105 | card->cid.prod_name[4] = unstuff_bits(resp, start: 64, size: 8); |
106 | card->cid.prod_name[5] = unstuff_bits(resp, start: 56, size: 8); |
107 | card->cid.prv = unstuff_bits(resp, start: 48, size: 8); |
108 | card->cid.serial = unstuff_bits(resp, start: 16, size: 32); |
109 | card->cid.month = unstuff_bits(resp, start: 12, size: 4); |
110 | card->cid.year = unstuff_bits(resp, start: 8, size: 4) + 1997; |
111 | break; |
112 | |
113 | default: |
114 | pr_err("%s: card has unknown MMCA version %d\n", |
115 | mmc_hostname(card->host), card->csd.mmca_vsn); |
116 | return -EINVAL; |
117 | } |
118 | |
119 | /* some product names include trailing whitespace */ |
120 | strim(card->cid.prod_name); |
121 | |
122 | return 0; |
123 | } |
124 | |
125 | static void mmc_set_erase_size(struct mmc_card *card) |
126 | { |
127 | if (card->ext_csd.erase_group_def & 1) |
128 | card->erase_size = card->ext_csd.hc_erase_size; |
129 | else |
130 | card->erase_size = card->csd.erase_size; |
131 | |
132 | mmc_init_erase(card); |
133 | } |
134 | |
135 | |
136 | static void mmc_set_wp_grp_size(struct mmc_card *card) |
137 | { |
138 | if (card->ext_csd.erase_group_def & 1) |
139 | card->wp_grp_size = card->ext_csd.hc_erase_size * |
140 | card->ext_csd.raw_hc_erase_gap_size; |
141 | else |
142 | card->wp_grp_size = card->csd.erase_size * |
143 | (card->csd.wp_grp_size + 1); |
144 | } |
145 | |
146 | /* |
147 | * Given a 128-bit response, decode to our card CSD structure. |
148 | */ |
149 | static int mmc_decode_csd(struct mmc_card *card) |
150 | { |
151 | struct mmc_csd *csd = &card->csd; |
152 | unsigned int e, m, a, b; |
153 | u32 *resp = card->raw_csd; |
154 | |
155 | /* |
156 | * We only understand CSD structure v1.1 and v1.2. |
157 | * v1.2 has extra information in bits 15, 11 and 10. |
158 | * We also support eMMC v4.4 & v4.41. |
159 | */ |
160 | csd->structure = unstuff_bits(resp, start: 126, size: 2); |
161 | if (csd->structure == 0) { |
162 | pr_err("%s: unrecognised CSD structure version %d\n", |
163 | mmc_hostname(card->host), csd->structure); |
164 | return -EINVAL; |
165 | } |
166 | |
167 | csd->mmca_vsn = unstuff_bits(resp, start: 122, size: 4); |
168 | m = unstuff_bits(resp, start: 115, size: 4); |
169 | e = unstuff_bits(resp, start: 112, size: 3); |
170 | csd->taac_ns = (taac_exp[e] * taac_mant[m] + 9) / 10; |
171 | csd->taac_clks = unstuff_bits(resp, start: 104, size: 8) * 100; |
172 | |
173 | m = unstuff_bits(resp, start: 99, size: 4); |
174 | e = unstuff_bits(resp, start: 96, size: 3); |
175 | csd->max_dtr = tran_exp[e] * tran_mant[m]; |
176 | csd->cmdclass = unstuff_bits(resp, start: 84, size: 12); |
177 | |
178 | e = unstuff_bits(resp, start: 47, size: 3); |
179 | m = unstuff_bits(resp, start: 62, size: 12); |
180 | csd->capacity = (1 + m) << (e + 2); |
181 | |
182 | csd->read_blkbits = unstuff_bits(resp, start: 80, size: 4); |
183 | csd->read_partial = unstuff_bits(resp, start: 79, size: 1); |
184 | csd->write_misalign = unstuff_bits(resp, start: 78, size: 1); |
185 | csd->read_misalign = unstuff_bits(resp, start: 77, size: 1); |
186 | csd->dsr_imp = unstuff_bits(resp, start: 76, size: 1); |
187 | csd->r2w_factor = unstuff_bits(resp, start: 26, size: 3); |
188 | csd->write_blkbits = unstuff_bits(resp, start: 22, size: 4); |
189 | csd->write_partial = unstuff_bits(resp, start: 21, size: 1); |
190 | |
191 | if (csd->write_blkbits >= 9) { |
192 | a = unstuff_bits(resp, start: 42, size: 5); |
193 | b = unstuff_bits(resp, start: 37, size: 5); |
194 | csd->erase_size = (a + 1) * (b + 1); |
195 | csd->erase_size <<= csd->write_blkbits - 9; |
196 | csd->wp_grp_size = unstuff_bits(resp, start: 32, size: 5); |
197 | } |
198 | |
199 | return 0; |
200 | } |
201 | |
202 | static void mmc_select_card_type(struct mmc_card *card) |
203 | { |
204 | struct mmc_host *host = card->host; |
205 | u8 card_type = card->ext_csd.raw_card_type; |
206 | u32 caps = host->caps, caps2 = host->caps2; |
207 | unsigned int hs_max_dtr = 0, hs200_max_dtr = 0; |
208 | unsigned int avail_type = 0; |
209 | |
210 | if (caps & MMC_CAP_MMC_HIGHSPEED && |
211 | card_type & EXT_CSD_CARD_TYPE_HS_26) { |
212 | hs_max_dtr = MMC_HIGH_26_MAX_DTR; |
213 | avail_type |= EXT_CSD_CARD_TYPE_HS_26; |
214 | } |
215 | |
216 | if (caps & MMC_CAP_MMC_HIGHSPEED && |
217 | card_type & EXT_CSD_CARD_TYPE_HS_52) { |
218 | hs_max_dtr = MMC_HIGH_52_MAX_DTR; |
219 | avail_type |= EXT_CSD_CARD_TYPE_HS_52; |
220 | } |
221 | |
222 | if (caps & (MMC_CAP_1_8V_DDR | MMC_CAP_3_3V_DDR) && |
223 | card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) { |
224 | hs_max_dtr = MMC_HIGH_DDR_MAX_DTR; |
225 | avail_type |= EXT_CSD_CARD_TYPE_DDR_1_8V; |
226 | } |
227 | |
228 | if (caps & MMC_CAP_1_2V_DDR && |
229 | card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) { |
230 | hs_max_dtr = MMC_HIGH_DDR_MAX_DTR; |
231 | avail_type |= EXT_CSD_CARD_TYPE_DDR_1_2V; |
232 | } |
233 | |
234 | if (caps2 & MMC_CAP2_HS200_1_8V_SDR && |
235 | card_type & EXT_CSD_CARD_TYPE_HS200_1_8V) { |
236 | hs200_max_dtr = MMC_HS200_MAX_DTR; |
237 | avail_type |= EXT_CSD_CARD_TYPE_HS200_1_8V; |
238 | } |
239 | |
240 | if (caps2 & MMC_CAP2_HS200_1_2V_SDR && |
241 | card_type & EXT_CSD_CARD_TYPE_HS200_1_2V) { |
242 | hs200_max_dtr = MMC_HS200_MAX_DTR; |
243 | avail_type |= EXT_CSD_CARD_TYPE_HS200_1_2V; |
244 | } |
245 | |
246 | if (caps2 & MMC_CAP2_HS400_1_8V && |
247 | card_type & EXT_CSD_CARD_TYPE_HS400_1_8V) { |
248 | hs200_max_dtr = MMC_HS200_MAX_DTR; |
249 | avail_type |= EXT_CSD_CARD_TYPE_HS400_1_8V; |
250 | } |
251 | |
252 | if (caps2 & MMC_CAP2_HS400_1_2V && |
253 | card_type & EXT_CSD_CARD_TYPE_HS400_1_2V) { |
254 | hs200_max_dtr = MMC_HS200_MAX_DTR; |
255 | avail_type |= EXT_CSD_CARD_TYPE_HS400_1_2V; |
256 | } |
257 | |
258 | if ((caps2 & MMC_CAP2_HS400_ES) && |
259 | card->ext_csd.strobe_support && |
260 | (avail_type & EXT_CSD_CARD_TYPE_HS400)) |
261 | avail_type |= EXT_CSD_CARD_TYPE_HS400ES; |
262 | |
263 | card->ext_csd.hs_max_dtr = hs_max_dtr; |
264 | card->ext_csd.hs200_max_dtr = hs200_max_dtr; |
265 | card->mmc_avail_type = avail_type; |
266 | } |
267 | |
268 | static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd) |
269 | { |
270 | u8 hc_erase_grp_sz, hc_wp_grp_sz; |
271 | |
272 | /* |
273 | * Disable these attributes by default |
274 | */ |
275 | card->ext_csd.enhanced_area_offset = -EINVAL; |
276 | card->ext_csd.enhanced_area_size = -EINVAL; |
277 | |
278 | /* |
279 | * Enhanced area feature support -- check whether the eMMC |
280 | * card has the Enhanced area enabled. If so, export enhanced |
281 | * area offset and size to user by adding sysfs interface. |
282 | */ |
283 | if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) && |
284 | (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) { |
285 | if (card->ext_csd.partition_setting_completed) { |
286 | hc_erase_grp_sz = |
287 | ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; |
288 | hc_wp_grp_sz = |
289 | ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; |
290 | |
291 | /* |
292 | * calculate the enhanced data area offset, in bytes |
293 | */ |
294 | card->ext_csd.enhanced_area_offset = |
295 | (((unsigned long long)ext_csd[139]) << 24) + |
296 | (((unsigned long long)ext_csd[138]) << 16) + |
297 | (((unsigned long long)ext_csd[137]) << 8) + |
298 | (((unsigned long long)ext_csd[136])); |
299 | if (mmc_card_blockaddr(card)) |
300 | card->ext_csd.enhanced_area_offset <<= 9; |
301 | /* |
302 | * calculate the enhanced data area size, in kilobytes |
303 | */ |
304 | card->ext_csd.enhanced_area_size = |
305 | (ext_csd[142] << 16) + (ext_csd[141] << 8) + |
306 | ext_csd[140]; |
307 | card->ext_csd.enhanced_area_size *= |
308 | (size_t)(hc_erase_grp_sz * hc_wp_grp_sz); |
309 | card->ext_csd.enhanced_area_size <<= 9; |
310 | } else { |
311 | pr_warn("%s: defines enhanced area without partition setting complete\n", |
312 | mmc_hostname(card->host)); |
313 | } |
314 | } |
315 | } |
316 | |
317 | static void mmc_part_add(struct mmc_card *card, u64 size, |
318 | unsigned int part_cfg, char *name, int idx, bool ro, |
319 | int area_type) |
320 | { |
321 | card->part[card->nr_parts].size = size; |
322 | card->part[card->nr_parts].part_cfg = part_cfg; |
323 | sprintf(buf: card->part[card->nr_parts].name, fmt: name, idx); |
324 | card->part[card->nr_parts].force_ro = ro; |
325 | card->part[card->nr_parts].area_type = area_type; |
326 | card->nr_parts++; |
327 | } |
328 | |
329 | static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd) |
330 | { |
331 | int idx; |
332 | u8 hc_erase_grp_sz, hc_wp_grp_sz; |
333 | u64 part_size; |
334 | |
335 | /* |
336 | * General purpose partition feature support -- |
337 | * If ext_csd has the size of general purpose partitions, |
338 | * set size, part_cfg, partition name in mmc_part. |
339 | */ |
340 | if (ext_csd[EXT_CSD_PARTITION_SUPPORT] & |
341 | EXT_CSD_PART_SUPPORT_PART_EN) { |
342 | hc_erase_grp_sz = |
343 | ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; |
344 | hc_wp_grp_sz = |
345 | ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; |
346 | |
347 | for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) { |
348 | if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] && |
349 | !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] && |
350 | !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]) |
351 | continue; |
352 | if (card->ext_csd.partition_setting_completed == 0) { |
353 | pr_warn("%s: has partition size defined without partition complete\n", |
354 | mmc_hostname(card->host)); |
355 | break; |
356 | } |
357 | part_size = |
358 | (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2] |
359 | << 16) + |
360 | (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] |
361 | << 8) + |
362 | ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3]; |
363 | part_size *= (hc_erase_grp_sz * hc_wp_grp_sz); |
364 | mmc_part_add(card, size: part_size << 19, |
365 | EXT_CSD_PART_CONFIG_ACC_GP0 + idx, |
366 | name: "gp%d", idx, ro: false, |
367 | MMC_BLK_DATA_AREA_GP); |
368 | } |
369 | } |
370 | } |
371 | |
372 | /* Minimum partition switch timeout in milliseconds */ |
373 | #define MMC_MIN_PART_SWITCH_TIME 300 |
374 | |
375 | /* |
376 | * Decode extended CSD. |
377 | */ |
378 | static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd) |
379 | { |
380 | int err = 0, idx; |
381 | u64 part_size; |
382 | struct device_node *np; |
383 | bool broken_hpi = false; |
384 | |
385 | /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */ |
386 | card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE]; |
387 | if (card->csd.structure == 3) { |
388 | if (card->ext_csd.raw_ext_csd_structure > 2) { |
389 | pr_err("%s: unrecognised EXT_CSD structure " |
390 | "version %d\n", mmc_hostname(card->host), |
391 | card->ext_csd.raw_ext_csd_structure); |
392 | err = -EINVAL; |
393 | goto out; |
394 | } |
395 | } |
396 | |
397 | np = mmc_of_find_child_device(host: card->host, func_num: 0); |
398 | if (np && of_device_is_compatible(device: np, "mmc-card")) |
399 | broken_hpi = of_property_read_bool(np, propname: "broken-hpi"); |
400 | of_node_put(node: np); |
401 | |
402 | /* |
403 | * The EXT_CSD format is meant to be forward compatible. As long |
404 | * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV |
405 | * are authorized, see JEDEC JESD84-B50 section B.8. |
406 | */ |
407 | card->ext_csd.rev = ext_csd[EXT_CSD_REV]; |
408 | |
409 | /* fixup device after ext_csd revision field is updated */ |
410 | mmc_fixup_device(card, table: mmc_ext_csd_fixups); |
411 | |
412 | card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0]; |
413 | card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1]; |
414 | card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2]; |
415 | card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3]; |
416 | if (card->ext_csd.rev >= 2) { |
417 | card->ext_csd.sectors = |
418 | ext_csd[EXT_CSD_SEC_CNT + 0] << 0 | |
419 | ext_csd[EXT_CSD_SEC_CNT + 1] << 8 | |
420 | ext_csd[EXT_CSD_SEC_CNT + 2] << 16 | |
421 | ext_csd[EXT_CSD_SEC_CNT + 3] << 24; |
422 | |
423 | /* Cards with density > 2GiB are sector addressed */ |
424 | if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512) |
425 | mmc_card_set_blockaddr(card); |
426 | } |
427 | |
428 | card->ext_csd.strobe_support = ext_csd[EXT_CSD_STROBE_SUPPORT]; |
429 | card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE]; |
430 | |
431 | card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT]; |
432 | card->ext_csd.raw_erase_timeout_mult = |
433 | ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]; |
434 | card->ext_csd.raw_hc_erase_grp_size = |
435 | ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; |
436 | card->ext_csd.raw_boot_mult = |
437 | ext_csd[EXT_CSD_BOOT_MULT]; |
438 | if (card->ext_csd.rev >= 3) { |
439 | u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT]; |
440 | card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG]; |
441 | |
442 | /* EXT_CSD value is in units of 10ms, but we store in ms */ |
443 | card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME]; |
444 | |
445 | /* Sleep / awake timeout in 100ns units */ |
446 | if (sa_shift > 0 && sa_shift <= 0x17) |
447 | card->ext_csd.sa_timeout = |
448 | 1 << ext_csd[EXT_CSD_S_A_TIMEOUT]; |
449 | card->ext_csd.erase_group_def = |
450 | ext_csd[EXT_CSD_ERASE_GROUP_DEF]; |
451 | card->ext_csd.hc_erase_timeout = 300 * |
452 | ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]; |
453 | card->ext_csd.hc_erase_size = |
454 | ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10; |
455 | |
456 | card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C]; |
457 | |
458 | /* |
459 | * There are two boot regions of equal size, defined in |
460 | * multiples of 128K. |
461 | */ |
462 | if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_host_can_access_boot(host: card->host)) { |
463 | for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) { |
464 | part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17; |
465 | mmc_part_add(card, size: part_size, |
466 | EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx, |
467 | name: "boot%d", idx, ro: true, |
468 | MMC_BLK_DATA_AREA_BOOT); |
469 | } |
470 | } |
471 | } |
472 | |
473 | card->ext_csd.raw_hc_erase_gap_size = |
474 | ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; |
475 | card->ext_csd.raw_sec_trim_mult = |
476 | ext_csd[EXT_CSD_SEC_TRIM_MULT]; |
477 | card->ext_csd.raw_sec_erase_mult = |
478 | ext_csd[EXT_CSD_SEC_ERASE_MULT]; |
479 | card->ext_csd.raw_sec_feature_support = |
480 | ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]; |
481 | card->ext_csd.raw_trim_mult = |
482 | ext_csd[EXT_CSD_TRIM_MULT]; |
483 | card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT]; |
484 | card->ext_csd.raw_driver_strength = ext_csd[EXT_CSD_DRIVER_STRENGTH]; |
485 | if (card->ext_csd.rev >= 4) { |
486 | if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] & |
487 | EXT_CSD_PART_SETTING_COMPLETED) |
488 | card->ext_csd.partition_setting_completed = 1; |
489 | else |
490 | card->ext_csd.partition_setting_completed = 0; |
491 | |
492 | mmc_manage_enhanced_area(card, ext_csd); |
493 | |
494 | mmc_manage_gp_partitions(card, ext_csd); |
495 | |
496 | card->ext_csd.sec_trim_mult = |
497 | ext_csd[EXT_CSD_SEC_TRIM_MULT]; |
498 | card->ext_csd.sec_erase_mult = |
499 | ext_csd[EXT_CSD_SEC_ERASE_MULT]; |
500 | card->ext_csd.sec_feature_support = |
501 | ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]; |
502 | card->ext_csd.trim_timeout = 300 * |
503 | ext_csd[EXT_CSD_TRIM_MULT]; |
504 | |
505 | /* |
506 | * Note that the call to mmc_part_add above defaults to read |
507 | * only. If this default assumption is changed, the call must |
508 | * take into account the value of boot_locked below. |
509 | */ |
510 | card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP]; |
511 | card->ext_csd.boot_ro_lockable = true; |
512 | |
513 | /* Save power class values */ |
514 | card->ext_csd.raw_pwr_cl_52_195 = |
515 | ext_csd[EXT_CSD_PWR_CL_52_195]; |
516 | card->ext_csd.raw_pwr_cl_26_195 = |
517 | ext_csd[EXT_CSD_PWR_CL_26_195]; |
518 | card->ext_csd.raw_pwr_cl_52_360 = |
519 | ext_csd[EXT_CSD_PWR_CL_52_360]; |
520 | card->ext_csd.raw_pwr_cl_26_360 = |
521 | ext_csd[EXT_CSD_PWR_CL_26_360]; |
522 | card->ext_csd.raw_pwr_cl_200_195 = |
523 | ext_csd[EXT_CSD_PWR_CL_200_195]; |
524 | card->ext_csd.raw_pwr_cl_200_360 = |
525 | ext_csd[EXT_CSD_PWR_CL_200_360]; |
526 | card->ext_csd.raw_pwr_cl_ddr_52_195 = |
527 | ext_csd[EXT_CSD_PWR_CL_DDR_52_195]; |
528 | card->ext_csd.raw_pwr_cl_ddr_52_360 = |
529 | ext_csd[EXT_CSD_PWR_CL_DDR_52_360]; |
530 | card->ext_csd.raw_pwr_cl_ddr_200_360 = |
531 | ext_csd[EXT_CSD_PWR_CL_DDR_200_360]; |
532 | } |
533 | |
534 | if (card->ext_csd.rev >= 5) { |
535 | /* Adjust production date as per JEDEC JESD84-B451 */ |
536 | if (card->cid.year < 2010) |
537 | card->cid.year += 16; |
538 | |
539 | /* check whether the eMMC card supports BKOPS */ |
540 | if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) { |
541 | card->ext_csd.bkops = 1; |
542 | card->ext_csd.man_bkops_en = |
543 | (ext_csd[EXT_CSD_BKOPS_EN] & |
544 | EXT_CSD_MANUAL_BKOPS_MASK); |
545 | card->ext_csd.raw_bkops_status = |
546 | ext_csd[EXT_CSD_BKOPS_STATUS]; |
547 | if (card->ext_csd.man_bkops_en) |
548 | pr_debug("%s: MAN_BKOPS_EN bit is set\n", |
549 | mmc_hostname(card->host)); |
550 | card->ext_csd.auto_bkops_en = |
551 | (ext_csd[EXT_CSD_BKOPS_EN] & |
552 | EXT_CSD_AUTO_BKOPS_MASK); |
553 | if (card->ext_csd.auto_bkops_en) |
554 | pr_debug("%s: AUTO_BKOPS_EN bit is set\n", |
555 | mmc_hostname(card->host)); |
556 | } |
557 | |
558 | /* check whether the eMMC card supports HPI */ |
559 | if (!mmc_card_broken_hpi(c: card) && |
560 | !broken_hpi && (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1)) { |
561 | card->ext_csd.hpi = 1; |
562 | if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2) |
563 | card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION; |
564 | else |
565 | card->ext_csd.hpi_cmd = MMC_SEND_STATUS; |
566 | /* |
567 | * Indicate the maximum timeout to close |
568 | * a command interrupted by HPI |
569 | */ |
570 | card->ext_csd.out_of_int_time = |
571 | ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10; |
572 | } |
573 | |
574 | card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM]; |
575 | card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION]; |
576 | |
577 | /* |
578 | * RPMB regions are defined in multiples of 128K. |
579 | */ |
580 | card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT]; |
581 | if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_can_cmd23(host: card->host)) { |
582 | mmc_part_add(card, size: ext_csd[EXT_CSD_RPMB_MULT] << 17, |
583 | EXT_CSD_PART_CONFIG_ACC_RPMB, |
584 | name: "rpmb", idx: 0, ro: false, |
585 | MMC_BLK_DATA_AREA_RPMB); |
586 | } |
587 | } |
588 | |
589 | card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT]; |
590 | if (ext_csd[EXT_CSD_ERASED_MEM_CONT]) |
591 | card->erased_byte = 0xFF; |
592 | else |
593 | card->erased_byte = 0x0; |
594 | |
595 | /* eMMC v4.5 or later */ |
596 | card->ext_csd.generic_cmd6_time = DEFAULT_CMD6_TIMEOUT_MS; |
597 | if (card->ext_csd.rev >= 6) { |
598 | card->ext_csd.feature_support |= MMC_DISCARD_FEATURE; |
599 | |
600 | card->ext_csd.generic_cmd6_time = 10 * |
601 | ext_csd[EXT_CSD_GENERIC_CMD6_TIME]; |
602 | card->ext_csd.power_off_longtime = 10 * |
603 | ext_csd[EXT_CSD_POWER_OFF_LONG_TIME]; |
604 | |
605 | card->ext_csd.cache_size = |
606 | ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 | |
607 | ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 | |
608 | ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 | |
609 | ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24; |
610 | |
611 | if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1) |
612 | card->ext_csd.data_sector_size = 4096; |
613 | else |
614 | card->ext_csd.data_sector_size = 512; |
615 | |
616 | if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) && |
617 | (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) { |
618 | card->ext_csd.data_tag_unit_size = |
619 | ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) * |
620 | (card->ext_csd.data_sector_size); |
621 | } else { |
622 | card->ext_csd.data_tag_unit_size = 0; |
623 | } |
624 | } else { |
625 | card->ext_csd.data_sector_size = 512; |
626 | } |
627 | |
628 | /* |
629 | * GENERIC_CMD6_TIME is to be used "unless a specific timeout is defined |
630 | * when accessing a specific field", so use it here if there is no |
631 | * PARTITION_SWITCH_TIME. |
632 | */ |
633 | if (!card->ext_csd.part_time) |
634 | card->ext_csd.part_time = card->ext_csd.generic_cmd6_time; |
635 | /* Some eMMC set the value too low so set a minimum */ |
636 | if (card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME) |
637 | card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME; |
638 | |
639 | /* eMMC v5 or later */ |
640 | if (card->ext_csd.rev >= 7) { |
641 | memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION], |
642 | MMC_FIRMWARE_LEN); |
643 | card->ext_csd.ffu_capable = |
644 | (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) && |
645 | !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1); |
646 | |
647 | card->ext_csd.pre_eol_info = ext_csd[EXT_CSD_PRE_EOL_INFO]; |
648 | card->ext_csd.device_life_time_est_typ_a = |
649 | ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A]; |
650 | card->ext_csd.device_life_time_est_typ_b = |
651 | ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_B]; |
652 | } |
653 | |
654 | /* eMMC v5.1 or later */ |
655 | if (card->ext_csd.rev >= 8) { |
656 | card->ext_csd.cmdq_support = ext_csd[EXT_CSD_CMDQ_SUPPORT] & |
657 | EXT_CSD_CMDQ_SUPPORTED; |
658 | card->ext_csd.cmdq_depth = (ext_csd[EXT_CSD_CMDQ_DEPTH] & |
659 | EXT_CSD_CMDQ_DEPTH_MASK) + 1; |
660 | /* Exclude inefficiently small queue depths */ |
661 | if (card->ext_csd.cmdq_depth <= 2) { |
662 | card->ext_csd.cmdq_support = false; |
663 | card->ext_csd.cmdq_depth = 0; |
664 | } |
665 | if (card->ext_csd.cmdq_support) { |
666 | pr_debug("%s: Command Queue supported depth %u\n", |
667 | mmc_hostname(card->host), |
668 | card->ext_csd.cmdq_depth); |
669 | } |
670 | card->ext_csd.enhanced_rpmb_supported = |
671 | (card->ext_csd.rel_param & |
672 | EXT_CSD_WR_REL_PARAM_EN_RPMB_REL_WR); |
673 | } |
674 | out: |
675 | return err; |
676 | } |
677 | |
678 | static int mmc_read_ext_csd(struct mmc_card *card) |
679 | { |
680 | u8 *ext_csd; |
681 | int err; |
682 | |
683 | if (!mmc_card_can_ext_csd(card)) |
684 | return 0; |
685 | |
686 | err = mmc_get_ext_csd(card, new_ext_csd: &ext_csd); |
687 | if (err) { |
688 | /* If the host or the card can't do the switch, |
689 | * fail more gracefully. */ |
690 | if ((err != -EINVAL) |
691 | && (err != -ENOSYS) |
692 | && (err != -EFAULT)) |
693 | return err; |
694 | |
695 | /* |
696 | * High capacity cards should have this "magic" size |
697 | * stored in their CSD. |
698 | */ |
699 | if (card->csd.capacity == (4096 * 512)) { |
700 | pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n", |
701 | mmc_hostname(card->host)); |
702 | } else { |
703 | pr_warn("%s: unable to read EXT_CSD, performance might suffer\n", |
704 | mmc_hostname(card->host)); |
705 | err = 0; |
706 | } |
707 | |
708 | return err; |
709 | } |
710 | |
711 | err = mmc_decode_ext_csd(card, ext_csd); |
712 | kfree(objp: ext_csd); |
713 | return err; |
714 | } |
715 | |
716 | static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width) |
717 | { |
718 | u8 *bw_ext_csd; |
719 | int err; |
720 | |
721 | if (bus_width == MMC_BUS_WIDTH_1) |
722 | return 0; |
723 | |
724 | err = mmc_get_ext_csd(card, new_ext_csd: &bw_ext_csd); |
725 | if (err) |
726 | return err; |
727 | |
728 | /* only compare read only fields */ |
729 | err = !((card->ext_csd.raw_partition_support == |
730 | bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) && |
731 | (card->ext_csd.raw_erased_mem_count == |
732 | bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) && |
733 | (card->ext_csd.rev == |
734 | bw_ext_csd[EXT_CSD_REV]) && |
735 | (card->ext_csd.raw_ext_csd_structure == |
736 | bw_ext_csd[EXT_CSD_STRUCTURE]) && |
737 | (card->ext_csd.raw_card_type == |
738 | bw_ext_csd[EXT_CSD_CARD_TYPE]) && |
739 | (card->ext_csd.raw_s_a_timeout == |
740 | bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) && |
741 | (card->ext_csd.raw_hc_erase_gap_size == |
742 | bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) && |
743 | (card->ext_csd.raw_erase_timeout_mult == |
744 | bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) && |
745 | (card->ext_csd.raw_hc_erase_grp_size == |
746 | bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) && |
747 | (card->ext_csd.raw_sec_trim_mult == |
748 | bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) && |
749 | (card->ext_csd.raw_sec_erase_mult == |
750 | bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) && |
751 | (card->ext_csd.raw_sec_feature_support == |
752 | bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) && |
753 | (card->ext_csd.raw_trim_mult == |
754 | bw_ext_csd[EXT_CSD_TRIM_MULT]) && |
755 | (card->ext_csd.raw_sectors[0] == |
756 | bw_ext_csd[EXT_CSD_SEC_CNT + 0]) && |
757 | (card->ext_csd.raw_sectors[1] == |
758 | bw_ext_csd[EXT_CSD_SEC_CNT + 1]) && |
759 | (card->ext_csd.raw_sectors[2] == |
760 | bw_ext_csd[EXT_CSD_SEC_CNT + 2]) && |
761 | (card->ext_csd.raw_sectors[3] == |
762 | bw_ext_csd[EXT_CSD_SEC_CNT + 3]) && |
763 | (card->ext_csd.raw_pwr_cl_52_195 == |
764 | bw_ext_csd[EXT_CSD_PWR_CL_52_195]) && |
765 | (card->ext_csd.raw_pwr_cl_26_195 == |
766 | bw_ext_csd[EXT_CSD_PWR_CL_26_195]) && |
767 | (card->ext_csd.raw_pwr_cl_52_360 == |
768 | bw_ext_csd[EXT_CSD_PWR_CL_52_360]) && |
769 | (card->ext_csd.raw_pwr_cl_26_360 == |
770 | bw_ext_csd[EXT_CSD_PWR_CL_26_360]) && |
771 | (card->ext_csd.raw_pwr_cl_200_195 == |
772 | bw_ext_csd[EXT_CSD_PWR_CL_200_195]) && |
773 | (card->ext_csd.raw_pwr_cl_200_360 == |
774 | bw_ext_csd[EXT_CSD_PWR_CL_200_360]) && |
775 | (card->ext_csd.raw_pwr_cl_ddr_52_195 == |
776 | bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) && |
777 | (card->ext_csd.raw_pwr_cl_ddr_52_360 == |
778 | bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) && |
779 | (card->ext_csd.raw_pwr_cl_ddr_200_360 == |
780 | bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360])); |
781 | |
782 | if (err) |
783 | err = -EINVAL; |
784 | |
785 | kfree(objp: bw_ext_csd); |
786 | return err; |
787 | } |
788 | |
789 | MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], |
790 | card->raw_cid[2], card->raw_cid[3]); |
791 | MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], |
792 | card->raw_csd[2], card->raw_csd[3]); |
793 | MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); |
794 | MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); |
795 | MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); |
796 | MMC_DEV_ATTR(wp_grp_size, "%u\n", card->wp_grp_size << 9); |
797 | MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable); |
798 | MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); |
799 | MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); |
800 | MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); |
801 | MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); |
802 | MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv); |
803 | MMC_DEV_ATTR(rev, "0x%x\n", card->ext_csd.rev); |
804 | MMC_DEV_ATTR(pre_eol_info, "0x%02x\n", card->ext_csd.pre_eol_info); |
805 | MMC_DEV_ATTR(life_time, "0x%02x 0x%02x\n", |
806 | card->ext_csd.device_life_time_est_typ_a, |
807 | card->ext_csd.device_life_time_est_typ_b); |
808 | MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); |
809 | MMC_DEV_ATTR(enhanced_area_offset, "%llu\n", |
810 | card->ext_csd.enhanced_area_offset); |
811 | MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size); |
812 | MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult); |
813 | MMC_DEV_ATTR(enhanced_rpmb_supported, "%#x\n", |
814 | card->ext_csd.enhanced_rpmb_supported); |
815 | MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors); |
816 | MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr); |
817 | MMC_DEV_ATTR(rca, "0x%04x\n", card->rca); |
818 | MMC_DEV_ATTR(cmdq_en, "%d\n", card->ext_csd.cmdq_en); |
819 | |
820 | static ssize_t mmc_fwrev_show(struct device *dev, |
821 | struct device_attribute *attr, |
822 | char *buf) |
823 | { |
824 | struct mmc_card *card = mmc_dev_to_card(dev); |
825 | |
826 | if (card->ext_csd.rev < 7) |
827 | return sysfs_emit(buf, fmt: "0x%x\n", card->cid.fwrev); |
828 | else |
829 | return sysfs_emit(buf, fmt: "0x%*phN\n", MMC_FIRMWARE_LEN, |
830 | card->ext_csd.fwrev); |
831 | } |
832 | |
833 | static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL); |
834 | |
835 | static ssize_t mmc_dsr_show(struct device *dev, |
836 | struct device_attribute *attr, |
837 | char *buf) |
838 | { |
839 | struct mmc_card *card = mmc_dev_to_card(dev); |
840 | struct mmc_host *host = card->host; |
841 | |
842 | if (card->csd.dsr_imp && host->dsr_req) |
843 | return sysfs_emit(buf, fmt: "0x%x\n", host->dsr); |
844 | else |
845 | /* return default DSR value */ |
846 | return sysfs_emit(buf, fmt: "0x%x\n", 0x404); |
847 | } |
848 | |
849 | static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL); |
850 | |
851 | static struct attribute *mmc_std_attrs[] = { |
852 | &dev_attr_cid.attr, |
853 | &dev_attr_csd.attr, |
854 | &dev_attr_date.attr, |
855 | &dev_attr_erase_size.attr, |
856 | &dev_attr_preferred_erase_size.attr, |
857 | &dev_attr_wp_grp_size.attr, |
858 | &dev_attr_fwrev.attr, |
859 | &dev_attr_ffu_capable.attr, |
860 | &dev_attr_hwrev.attr, |
861 | &dev_attr_manfid.attr, |
862 | &dev_attr_name.attr, |
863 | &dev_attr_oemid.attr, |
864 | &dev_attr_prv.attr, |
865 | &dev_attr_rev.attr, |
866 | &dev_attr_pre_eol_info.attr, |
867 | &dev_attr_life_time.attr, |
868 | &dev_attr_serial.attr, |
869 | &dev_attr_enhanced_area_offset.attr, |
870 | &dev_attr_enhanced_area_size.attr, |
871 | &dev_attr_raw_rpmb_size_mult.attr, |
872 | &dev_attr_enhanced_rpmb_supported.attr, |
873 | &dev_attr_rel_sectors.attr, |
874 | &dev_attr_ocr.attr, |
875 | &dev_attr_rca.attr, |
876 | &dev_attr_dsr.attr, |
877 | &dev_attr_cmdq_en.attr, |
878 | NULL, |
879 | }; |
880 | ATTRIBUTE_GROUPS(mmc_std); |
881 | |
882 | static const struct device_type mmc_type = { |
883 | .groups = mmc_std_groups, |
884 | }; |
885 | |
886 | /* |
887 | * Select the PowerClass for the current bus width |
888 | * If power class is defined for 4/8 bit bus in the |
889 | * extended CSD register, select it by executing the |
890 | * mmc_switch command. |
891 | */ |
892 | static int __mmc_select_powerclass(struct mmc_card *card, |
893 | unsigned int bus_width) |
894 | { |
895 | struct mmc_host *host = card->host; |
896 | struct mmc_ext_csd *ext_csd = &card->ext_csd; |
897 | unsigned int pwrclass_val = 0; |
898 | int err = 0; |
899 | |
900 | switch (1 << host->ios.vdd) { |
901 | case MMC_VDD_165_195: |
902 | if (host->ios.clock <= MMC_HIGH_26_MAX_DTR) |
903 | pwrclass_val = ext_csd->raw_pwr_cl_26_195; |
904 | else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR) |
905 | pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ? |
906 | ext_csd->raw_pwr_cl_52_195 : |
907 | ext_csd->raw_pwr_cl_ddr_52_195; |
908 | else if (host->ios.clock <= MMC_HS200_MAX_DTR) |
909 | pwrclass_val = ext_csd->raw_pwr_cl_200_195; |
910 | break; |
911 | case MMC_VDD_27_28: |
912 | case MMC_VDD_28_29: |
913 | case MMC_VDD_29_30: |
914 | case MMC_VDD_30_31: |
915 | case MMC_VDD_31_32: |
916 | case MMC_VDD_32_33: |
917 | case MMC_VDD_33_34: |
918 | case MMC_VDD_34_35: |
919 | case MMC_VDD_35_36: |
920 | if (host->ios.clock <= MMC_HIGH_26_MAX_DTR) |
921 | pwrclass_val = ext_csd->raw_pwr_cl_26_360; |
922 | else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR) |
923 | pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ? |
924 | ext_csd->raw_pwr_cl_52_360 : |
925 | ext_csd->raw_pwr_cl_ddr_52_360; |
926 | else if (host->ios.clock <= MMC_HS200_MAX_DTR) |
927 | pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ? |
928 | ext_csd->raw_pwr_cl_ddr_200_360 : |
929 | ext_csd->raw_pwr_cl_200_360; |
930 | break; |
931 | default: |
932 | pr_warn("%s: Voltage range not supported for power class\n", |
933 | mmc_hostname(host)); |
934 | return -EINVAL; |
935 | } |
936 | |
937 | if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8)) |
938 | pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >> |
939 | EXT_CSD_PWR_CL_8BIT_SHIFT; |
940 | else |
941 | pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >> |
942 | EXT_CSD_PWR_CL_4BIT_SHIFT; |
943 | |
944 | /* If the power class is different from the default value */ |
945 | if (pwrclass_val > 0) { |
946 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
947 | EXT_CSD_POWER_CLASS, |
948 | value: pwrclass_val, |
949 | timeout_ms: card->ext_csd.generic_cmd6_time); |
950 | } |
951 | |
952 | return err; |
953 | } |
954 | |
955 | static int mmc_select_powerclass(struct mmc_card *card) |
956 | { |
957 | struct mmc_host *host = card->host; |
958 | u32 bus_width, ext_csd_bits; |
959 | int err, ddr; |
960 | |
961 | /* Power class selection is supported for versions >= 4.0 */ |
962 | if (!mmc_card_can_ext_csd(card)) |
963 | return 0; |
964 | |
965 | bus_width = host->ios.bus_width; |
966 | /* Power class values are defined only for 4/8 bit bus */ |
967 | if (bus_width == MMC_BUS_WIDTH_1) |
968 | return 0; |
969 | |
970 | ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52; |
971 | if (ddr) |
972 | ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ? |
973 | EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4; |
974 | else |
975 | ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ? |
976 | EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4; |
977 | |
978 | err = __mmc_select_powerclass(card, bus_width: ext_csd_bits); |
979 | if (err) |
980 | pr_warn("%s: power class selection to bus width %d ddr %d failed\n", |
981 | mmc_hostname(host), 1 << bus_width, ddr); |
982 | |
983 | return err; |
984 | } |
985 | |
986 | /* |
987 | * Set the bus speed for the selected speed mode. |
988 | */ |
989 | static void mmc_set_bus_speed(struct mmc_card *card) |
990 | { |
991 | unsigned int max_dtr = (unsigned int)-1; |
992 | |
993 | if ((mmc_card_hs200(card) || mmc_card_hs400(card)) && |
994 | max_dtr > card->ext_csd.hs200_max_dtr) |
995 | max_dtr = card->ext_csd.hs200_max_dtr; |
996 | else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr) |
997 | max_dtr = card->ext_csd.hs_max_dtr; |
998 | else if (max_dtr > card->csd.max_dtr) |
999 | max_dtr = card->csd.max_dtr; |
1000 | |
1001 | mmc_set_clock(host: card->host, hz: max_dtr); |
1002 | } |
1003 | |
1004 | /* |
1005 | * Select the bus width amoung 4-bit and 8-bit(SDR). |
1006 | * If the bus width is changed successfully, return the selected width value. |
1007 | * Zero is returned instead of error value if the wide width is not supported. |
1008 | */ |
1009 | static int mmc_select_bus_width(struct mmc_card *card) |
1010 | { |
1011 | static unsigned ext_csd_bits[] = { |
1012 | EXT_CSD_BUS_WIDTH_8, |
1013 | EXT_CSD_BUS_WIDTH_4, |
1014 | EXT_CSD_BUS_WIDTH_1, |
1015 | }; |
1016 | static unsigned bus_widths[] = { |
1017 | MMC_BUS_WIDTH_8, |
1018 | MMC_BUS_WIDTH_4, |
1019 | MMC_BUS_WIDTH_1, |
1020 | }; |
1021 | struct mmc_host *host = card->host; |
1022 | unsigned idx, bus_width = 0; |
1023 | int err = 0; |
1024 | |
1025 | if (!mmc_card_can_ext_csd(card) || |
1026 | !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) |
1027 | return 0; |
1028 | |
1029 | idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1; |
1030 | |
1031 | /* |
1032 | * Unlike SD, MMC cards dont have a configuration register to notify |
1033 | * supported bus width. So bus test command should be run to identify |
1034 | * the supported bus width or compare the ext csd values of current |
1035 | * bus width and ext csd values of 1 bit mode read earlier. |
1036 | */ |
1037 | for (; idx < ARRAY_SIZE(bus_widths); idx++) { |
1038 | /* |
1039 | * Host is capable of 8bit transfer, then switch |
1040 | * the device to work in 8bit transfer mode. If the |
1041 | * mmc switch command returns error then switch to |
1042 | * 4bit transfer mode. On success set the corresponding |
1043 | * bus width on the host. |
1044 | */ |
1045 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
1046 | EXT_CSD_BUS_WIDTH, |
1047 | value: ext_csd_bits[idx], |
1048 | timeout_ms: card->ext_csd.generic_cmd6_time); |
1049 | if (err) |
1050 | continue; |
1051 | |
1052 | bus_width = bus_widths[idx]; |
1053 | mmc_set_bus_width(host, width: bus_width); |
1054 | |
1055 | /* |
1056 | * If controller can't handle bus width test, |
1057 | * compare ext_csd previously read in 1 bit mode |
1058 | * against ext_csd at new bus width |
1059 | */ |
1060 | if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST)) |
1061 | err = mmc_compare_ext_csds(card, bus_width); |
1062 | else |
1063 | err = mmc_bus_test(card, bus_width); |
1064 | |
1065 | if (!err) { |
1066 | err = bus_width; |
1067 | break; |
1068 | } else { |
1069 | pr_warn("%s: switch to bus width %d failed\n", |
1070 | mmc_hostname(host), 1 << bus_width); |
1071 | } |
1072 | } |
1073 | |
1074 | return err; |
1075 | } |
1076 | |
1077 | /* |
1078 | * Switch to the high-speed mode |
1079 | */ |
1080 | static int mmc_select_hs(struct mmc_card *card) |
1081 | { |
1082 | int err; |
1083 | |
1084 | err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
1085 | EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS, |
1086 | timeout_ms: card->ext_csd.generic_cmd6_time, MMC_TIMING_MMC_HS, |
1087 | send_status: true, retry_crc_err: true, MMC_CMD_RETRIES); |
1088 | if (err) |
1089 | pr_warn("%s: switch to high-speed failed, err:%d\n", |
1090 | mmc_hostname(card->host), err); |
1091 | |
1092 | return err; |
1093 | } |
1094 | |
1095 | /* |
1096 | * Activate wide bus and DDR if supported. |
1097 | */ |
1098 | static int mmc_select_hs_ddr(struct mmc_card *card) |
1099 | { |
1100 | struct mmc_host *host = card->host; |
1101 | u32 bus_width, ext_csd_bits; |
1102 | int err = 0; |
1103 | |
1104 | if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52)) |
1105 | return 0; |
1106 | |
1107 | bus_width = host->ios.bus_width; |
1108 | if (bus_width == MMC_BUS_WIDTH_1) |
1109 | return 0; |
1110 | |
1111 | ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ? |
1112 | EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4; |
1113 | |
1114 | err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
1115 | EXT_CSD_BUS_WIDTH, |
1116 | value: ext_csd_bits, |
1117 | timeout_ms: card->ext_csd.generic_cmd6_time, |
1118 | MMC_TIMING_MMC_DDR52, |
1119 | send_status: true, retry_crc_err: true, MMC_CMD_RETRIES); |
1120 | if (err) { |
1121 | pr_err("%s: switch to bus width %d ddr failed\n", |
1122 | mmc_hostname(host), 1 << bus_width); |
1123 | return err; |
1124 | } |
1125 | |
1126 | /* |
1127 | * eMMC cards can support 3.3V to 1.2V i/o (vccq) |
1128 | * signaling. |
1129 | * |
1130 | * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq. |
1131 | * |
1132 | * 1.8V vccq at 3.3V core voltage (vcc) is not required |
1133 | * in the JEDEC spec for DDR. |
1134 | * |
1135 | * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all |
1136 | * host controller can support this, like some of the SDHCI |
1137 | * controller which connect to an eMMC device. Some of these |
1138 | * host controller still needs to use 1.8v vccq for supporting |
1139 | * DDR mode. |
1140 | * |
1141 | * So the sequence will be: |
1142 | * if (host and device can both support 1.2v IO) |
1143 | * use 1.2v IO; |
1144 | * else if (host and device can both support 1.8v IO) |
1145 | * use 1.8v IO; |
1146 | * so if host and device can only support 3.3v IO, this is the |
1147 | * last choice. |
1148 | * |
1149 | * WARNING: eMMC rules are NOT the same as SD DDR |
1150 | */ |
1151 | if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V) { |
1152 | err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120); |
1153 | if (!err) |
1154 | return 0; |
1155 | } |
1156 | |
1157 | if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V && |
1158 | host->caps & MMC_CAP_1_8V_DDR) |
1159 | err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); |
1160 | |
1161 | /* make sure vccq is 3.3v after switching disaster */ |
1162 | if (err) |
1163 | err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330); |
1164 | |
1165 | return err; |
1166 | } |
1167 | |
1168 | static int mmc_select_hs400(struct mmc_card *card) |
1169 | { |
1170 | struct mmc_host *host = card->host; |
1171 | unsigned int max_dtr; |
1172 | int err = 0; |
1173 | u8 val; |
1174 | |
1175 | /* |
1176 | * HS400 mode requires 8-bit bus width |
1177 | */ |
1178 | if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 && |
1179 | host->ios.bus_width == MMC_BUS_WIDTH_8)) |
1180 | return 0; |
1181 | |
1182 | /* Switch card to HS mode */ |
1183 | val = EXT_CSD_TIMING_HS; |
1184 | err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
1185 | EXT_CSD_HS_TIMING, value: val, |
1186 | timeout_ms: card->ext_csd.generic_cmd6_time, timing: 0, |
1187 | send_status: false, retry_crc_err: true, MMC_CMD_RETRIES); |
1188 | if (err) { |
1189 | pr_err("%s: switch to high-speed from hs200 failed, err:%d\n", |
1190 | mmc_hostname(host), err); |
1191 | return err; |
1192 | } |
1193 | |
1194 | /* Prepare host to downgrade to HS timing */ |
1195 | if (host->ops->hs400_downgrade) |
1196 | host->ops->hs400_downgrade(host); |
1197 | |
1198 | /* Set host controller to HS timing */ |
1199 | mmc_set_timing(host, MMC_TIMING_MMC_HS); |
1200 | |
1201 | /* Reduce frequency to HS frequency */ |
1202 | max_dtr = card->ext_csd.hs_max_dtr; |
1203 | mmc_set_clock(host, hz: max_dtr); |
1204 | |
1205 | err = mmc_switch_status(card, crc_err_fatal: true); |
1206 | if (err) |
1207 | goto out_err; |
1208 | |
1209 | if (host->ops->hs400_prepare_ddr) |
1210 | host->ops->hs400_prepare_ddr(host); |
1211 | |
1212 | /* Switch card to DDR */ |
1213 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
1214 | EXT_CSD_BUS_WIDTH, |
1215 | EXT_CSD_DDR_BUS_WIDTH_8, |
1216 | timeout_ms: card->ext_csd.generic_cmd6_time); |
1217 | if (err) { |
1218 | pr_err("%s: switch to bus width for hs400 failed, err:%d\n", |
1219 | mmc_hostname(host), err); |
1220 | return err; |
1221 | } |
1222 | |
1223 | /* Switch card to HS400 */ |
1224 | val = EXT_CSD_TIMING_HS400 | |
1225 | card->drive_strength << EXT_CSD_DRV_STR_SHIFT; |
1226 | err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
1227 | EXT_CSD_HS_TIMING, value: val, |
1228 | timeout_ms: card->ext_csd.generic_cmd6_time, timing: 0, |
1229 | send_status: false, retry_crc_err: true, MMC_CMD_RETRIES); |
1230 | if (err) { |
1231 | pr_err("%s: switch to hs400 failed, err:%d\n", |
1232 | mmc_hostname(host), err); |
1233 | return err; |
1234 | } |
1235 | |
1236 | /* Set host controller to HS400 timing and frequency */ |
1237 | mmc_set_timing(host, MMC_TIMING_MMC_HS400); |
1238 | mmc_set_bus_speed(card); |
1239 | |
1240 | if (host->ops->execute_hs400_tuning) { |
1241 | mmc_retune_disable(host); |
1242 | err = host->ops->execute_hs400_tuning(host, card); |
1243 | mmc_retune_enable(host); |
1244 | if (err) |
1245 | goto out_err; |
1246 | } |
1247 | |
1248 | if (host->ops->hs400_complete) |
1249 | host->ops->hs400_complete(host); |
1250 | |
1251 | err = mmc_switch_status(card, crc_err_fatal: true); |
1252 | if (err) |
1253 | goto out_err; |
1254 | |
1255 | return 0; |
1256 | |
1257 | out_err: |
1258 | pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), |
1259 | __func__, err); |
1260 | return err; |
1261 | } |
1262 | |
1263 | int mmc_hs200_to_hs400(struct mmc_card *card) |
1264 | { |
1265 | return mmc_select_hs400(card); |
1266 | } |
1267 | |
1268 | int mmc_hs400_to_hs200(struct mmc_card *card) |
1269 | { |
1270 | struct mmc_host *host = card->host; |
1271 | unsigned int max_dtr; |
1272 | int err; |
1273 | u8 val; |
1274 | |
1275 | /* Reduce frequency to HS */ |
1276 | max_dtr = card->ext_csd.hs_max_dtr; |
1277 | mmc_set_clock(host, hz: max_dtr); |
1278 | |
1279 | /* Switch HS400 to HS DDR */ |
1280 | val = EXT_CSD_TIMING_HS; |
1281 | err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, |
1282 | value: val, timeout_ms: card->ext_csd.generic_cmd6_time, timing: 0, |
1283 | send_status: false, retry_crc_err: true, MMC_CMD_RETRIES); |
1284 | if (err) |
1285 | goto out_err; |
1286 | |
1287 | if (host->ops->hs400_downgrade) |
1288 | host->ops->hs400_downgrade(host); |
1289 | |
1290 | mmc_set_timing(host, MMC_TIMING_MMC_DDR52); |
1291 | |
1292 | err = mmc_switch_status(card, crc_err_fatal: true); |
1293 | if (err) |
1294 | goto out_err; |
1295 | |
1296 | /* Switch HS DDR to HS */ |
1297 | err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH, |
1298 | EXT_CSD_BUS_WIDTH_8, timeout_ms: card->ext_csd.generic_cmd6_time, |
1299 | timing: 0, send_status: false, retry_crc_err: true, MMC_CMD_RETRIES); |
1300 | if (err) |
1301 | goto out_err; |
1302 | |
1303 | mmc_set_timing(host, MMC_TIMING_MMC_HS); |
1304 | |
1305 | err = mmc_switch_status(card, crc_err_fatal: true); |
1306 | if (err) |
1307 | goto out_err; |
1308 | |
1309 | /* Switch HS to HS200 */ |
1310 | val = EXT_CSD_TIMING_HS200 | |
1311 | card->drive_strength << EXT_CSD_DRV_STR_SHIFT; |
1312 | err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, |
1313 | value: val, timeout_ms: card->ext_csd.generic_cmd6_time, timing: 0, |
1314 | send_status: false, retry_crc_err: true, MMC_CMD_RETRIES); |
1315 | if (err) |
1316 | goto out_err; |
1317 | |
1318 | mmc_set_timing(host, MMC_TIMING_MMC_HS200); |
1319 | |
1320 | /* |
1321 | * For HS200, CRC errors are not a reliable way to know the switch |
1322 | * failed. If there really is a problem, we would expect tuning will |
1323 | * fail and the result ends up the same. |
1324 | */ |
1325 | err = mmc_switch_status(card, crc_err_fatal: false); |
1326 | if (err) |
1327 | goto out_err; |
1328 | |
1329 | mmc_set_bus_speed(card); |
1330 | |
1331 | /* Prepare tuning for HS400 mode. */ |
1332 | if (host->ops->prepare_hs400_tuning) |
1333 | host->ops->prepare_hs400_tuning(host, &host->ios); |
1334 | |
1335 | return 0; |
1336 | |
1337 | out_err: |
1338 | pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), |
1339 | __func__, err); |
1340 | return err; |
1341 | } |
1342 | |
1343 | static void mmc_select_driver_type(struct mmc_card *card) |
1344 | { |
1345 | int card_drv_type, drive_strength, drv_type = 0; |
1346 | int fixed_drv_type = card->host->fixed_drv_type; |
1347 | |
1348 | card_drv_type = card->ext_csd.raw_driver_strength | |
1349 | mmc_driver_type_mask(0); |
1350 | |
1351 | if (fixed_drv_type >= 0) |
1352 | drive_strength = card_drv_type & mmc_driver_type_mask(fixed_drv_type) |
1353 | ? fixed_drv_type : 0; |
1354 | else |
1355 | drive_strength = mmc_select_drive_strength(card, |
1356 | max_dtr: card->ext_csd.hs200_max_dtr, |
1357 | card_drv_type, drv_type: &drv_type); |
1358 | |
1359 | card->drive_strength = drive_strength; |
1360 | |
1361 | if (drv_type) |
1362 | mmc_set_driver_type(host: card->host, drv_type); |
1363 | } |
1364 | |
1365 | static int mmc_select_hs400es(struct mmc_card *card) |
1366 | { |
1367 | struct mmc_host *host = card->host; |
1368 | int err = -EINVAL; |
1369 | u8 val; |
1370 | |
1371 | if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_2V) |
1372 | err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120); |
1373 | |
1374 | if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_8V) |
1375 | err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); |
1376 | |
1377 | /* If fails try again during next card power cycle */ |
1378 | if (err) |
1379 | goto out_err; |
1380 | |
1381 | err = mmc_select_bus_width(card); |
1382 | if (err != MMC_BUS_WIDTH_8) { |
1383 | pr_err("%s: switch to 8bit bus width failed, err:%d\n", |
1384 | mmc_hostname(host), err); |
1385 | err = err < 0 ? err : -ENOTSUPP; |
1386 | goto out_err; |
1387 | } |
1388 | |
1389 | /* Switch card to HS mode */ |
1390 | err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
1391 | EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS, |
1392 | timeout_ms: card->ext_csd.generic_cmd6_time, timing: 0, |
1393 | send_status: false, retry_crc_err: true, MMC_CMD_RETRIES); |
1394 | if (err) { |
1395 | pr_err("%s: switch to hs for hs400es failed, err:%d\n", |
1396 | mmc_hostname(host), err); |
1397 | goto out_err; |
1398 | } |
1399 | |
1400 | /* |
1401 | * Bump to HS timing and frequency. Some cards don't handle |
1402 | * SEND_STATUS reliably at the initial frequency. |
1403 | */ |
1404 | mmc_set_timing(host, MMC_TIMING_MMC_HS); |
1405 | mmc_set_bus_speed(card); |
1406 | |
1407 | err = mmc_switch_status(card, crc_err_fatal: true); |
1408 | if (err) |
1409 | goto out_err; |
1410 | |
1411 | /* Switch card to DDR with strobe bit */ |
1412 | val = EXT_CSD_DDR_BUS_WIDTH_8 | EXT_CSD_BUS_WIDTH_STROBE; |
1413 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
1414 | EXT_CSD_BUS_WIDTH, |
1415 | value: val, |
1416 | timeout_ms: card->ext_csd.generic_cmd6_time); |
1417 | if (err) { |
1418 | pr_err("%s: switch to bus width for hs400es failed, err:%d\n", |
1419 | mmc_hostname(host), err); |
1420 | goto out_err; |
1421 | } |
1422 | |
1423 | mmc_select_driver_type(card); |
1424 | |
1425 | /* Switch card to HS400 */ |
1426 | val = EXT_CSD_TIMING_HS400 | |
1427 | card->drive_strength << EXT_CSD_DRV_STR_SHIFT; |
1428 | err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
1429 | EXT_CSD_HS_TIMING, value: val, |
1430 | timeout_ms: card->ext_csd.generic_cmd6_time, timing: 0, |
1431 | send_status: false, retry_crc_err: true, MMC_CMD_RETRIES); |
1432 | if (err) { |
1433 | pr_err("%s: switch to hs400es failed, err:%d\n", |
1434 | mmc_hostname(host), err); |
1435 | goto out_err; |
1436 | } |
1437 | |
1438 | /* Set host controller to HS400 timing and frequency */ |
1439 | mmc_set_timing(host, MMC_TIMING_MMC_HS400); |
1440 | |
1441 | /* Controller enable enhanced strobe function */ |
1442 | host->ios.enhanced_strobe = true; |
1443 | if (host->ops->hs400_enhanced_strobe) |
1444 | host->ops->hs400_enhanced_strobe(host, &host->ios); |
1445 | |
1446 | err = mmc_switch_status(card, crc_err_fatal: true); |
1447 | if (err) |
1448 | goto out_err; |
1449 | |
1450 | return 0; |
1451 | |
1452 | out_err: |
1453 | pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), |
1454 | __func__, err); |
1455 | return err; |
1456 | } |
1457 | |
1458 | /* |
1459 | * For device supporting HS200 mode, the following sequence |
1460 | * should be done before executing the tuning process. |
1461 | * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported) |
1462 | * 2. switch to HS200 mode |
1463 | * 3. set the clock to > 52Mhz and <=200MHz |
1464 | */ |
1465 | static int mmc_select_hs200(struct mmc_card *card) |
1466 | { |
1467 | struct mmc_host *host = card->host; |
1468 | unsigned int old_timing, old_signal_voltage, old_clock; |
1469 | int err = -EINVAL; |
1470 | u8 val; |
1471 | |
1472 | old_signal_voltage = host->ios.signal_voltage; |
1473 | if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V) |
1474 | err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120); |
1475 | |
1476 | if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V) |
1477 | err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); |
1478 | |
1479 | /* If fails try again during next card power cycle */ |
1480 | if (err) |
1481 | return err; |
1482 | |
1483 | mmc_select_driver_type(card); |
1484 | |
1485 | /* |
1486 | * Set the bus width(4 or 8) with host's support and |
1487 | * switch to HS200 mode if bus width is set successfully. |
1488 | */ |
1489 | err = mmc_select_bus_width(card); |
1490 | if (err > 0) { |
1491 | val = EXT_CSD_TIMING_HS200 | |
1492 | card->drive_strength << EXT_CSD_DRV_STR_SHIFT; |
1493 | err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
1494 | EXT_CSD_HS_TIMING, value: val, |
1495 | timeout_ms: card->ext_csd.generic_cmd6_time, timing: 0, |
1496 | send_status: false, retry_crc_err: true, MMC_CMD_RETRIES); |
1497 | if (err) |
1498 | goto err; |
1499 | |
1500 | /* |
1501 | * Bump to HS timing and frequency. Some cards don't handle |
1502 | * SEND_STATUS reliably at the initial frequency. |
1503 | * NB: We can't move to full (HS200) speeds until after we've |
1504 | * successfully switched over. |
1505 | */ |
1506 | old_timing = host->ios.timing; |
1507 | old_clock = host->ios.clock; |
1508 | mmc_set_timing(host, MMC_TIMING_MMC_HS200); |
1509 | mmc_set_clock(host: card->host, hz: card->ext_csd.hs_max_dtr); |
1510 | |
1511 | /* |
1512 | * For HS200, CRC errors are not a reliable way to know the |
1513 | * switch failed. If there really is a problem, we would expect |
1514 | * tuning will fail and the result ends up the same. |
1515 | */ |
1516 | err = mmc_switch_status(card, crc_err_fatal: false); |
1517 | |
1518 | /* |
1519 | * mmc_select_timing() assumes timing has not changed if |
1520 | * it is a switch error. |
1521 | */ |
1522 | if (err == -EBADMSG) { |
1523 | mmc_set_clock(host, hz: old_clock); |
1524 | mmc_set_timing(host, timing: old_timing); |
1525 | } |
1526 | } |
1527 | err: |
1528 | if (err) { |
1529 | /* fall back to the old signal voltage, if fails report error */ |
1530 | if (mmc_set_signal_voltage(host, signal_voltage: old_signal_voltage)) |
1531 | err = -EIO; |
1532 | |
1533 | pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), |
1534 | __func__, err); |
1535 | } |
1536 | return err; |
1537 | } |
1538 | |
1539 | /* |
1540 | * Activate High Speed, HS200 or HS400ES mode if supported. |
1541 | */ |
1542 | static int mmc_select_timing(struct mmc_card *card) |
1543 | { |
1544 | int err = 0; |
1545 | |
1546 | if (!mmc_card_can_ext_csd(card)) |
1547 | goto bus_speed; |
1548 | |
1549 | if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES) { |
1550 | err = mmc_select_hs400es(card); |
1551 | goto out; |
1552 | } |
1553 | |
1554 | if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200) { |
1555 | err = mmc_select_hs200(card); |
1556 | if (err == -EBADMSG) |
1557 | card->mmc_avail_type &= ~EXT_CSD_CARD_TYPE_HS200; |
1558 | else |
1559 | goto out; |
1560 | } |
1561 | |
1562 | if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS) |
1563 | err = mmc_select_hs(card); |
1564 | |
1565 | out: |
1566 | if (err && err != -EBADMSG) |
1567 | return err; |
1568 | |
1569 | bus_speed: |
1570 | /* |
1571 | * Set the bus speed to the selected bus timing. |
1572 | * If timing is not selected, backward compatible is the default. |
1573 | */ |
1574 | mmc_set_bus_speed(card); |
1575 | return 0; |
1576 | } |
1577 | |
1578 | /* |
1579 | * Execute tuning sequence to seek the proper bus operating |
1580 | * conditions for HS200 and HS400, which sends CMD21 to the device. |
1581 | */ |
1582 | static int mmc_hs200_tuning(struct mmc_card *card) |
1583 | { |
1584 | struct mmc_host *host = card->host; |
1585 | |
1586 | /* |
1587 | * Timing should be adjusted to the HS400 target |
1588 | * operation frequency for tuning process |
1589 | */ |
1590 | if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 && |
1591 | host->ios.bus_width == MMC_BUS_WIDTH_8) |
1592 | if (host->ops->prepare_hs400_tuning) |
1593 | host->ops->prepare_hs400_tuning(host, &host->ios); |
1594 | |
1595 | return mmc_execute_tuning(card); |
1596 | } |
1597 | |
1598 | /* |
1599 | * Handle the detection and initialisation of a card. |
1600 | * |
1601 | * In the case of a resume, "oldcard" will contain the card |
1602 | * we're trying to reinitialise. |
1603 | */ |
1604 | static int mmc_init_card(struct mmc_host *host, u32 ocr, |
1605 | struct mmc_card *oldcard) |
1606 | { |
1607 | struct mmc_card *card; |
1608 | int err; |
1609 | u32 cid[4]; |
1610 | u32 rocr; |
1611 | |
1612 | WARN_ON(!host->claimed); |
1613 | |
1614 | /* Set correct bus mode for MMC before attempting init */ |
1615 | if (!mmc_host_is_spi(host)) |
1616 | mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN); |
1617 | |
1618 | /* |
1619 | * Since we're changing the OCR value, we seem to |
1620 | * need to tell some cards to go back to the idle |
1621 | * state. We wait 1ms to give cards time to |
1622 | * respond. |
1623 | * mmc_go_idle is needed for eMMC that are asleep |
1624 | */ |
1625 | mmc_go_idle(host); |
1626 | |
1627 | /* The extra bit indicates that we support high capacity */ |
1628 | err = mmc_send_op_cond(host, ocr: ocr | (1 << 30), rocr: &rocr); |
1629 | if (err) |
1630 | goto err; |
1631 | |
1632 | /* |
1633 | * For SPI, enable CRC as appropriate. |
1634 | */ |
1635 | if (mmc_host_is_spi(host)) { |
1636 | err = mmc_spi_set_crc(host, use_crc: use_spi_crc); |
1637 | if (err) |
1638 | goto err; |
1639 | } |
1640 | |
1641 | /* |
1642 | * Fetch CID from card. |
1643 | */ |
1644 | err = mmc_send_cid(host, cid); |
1645 | if (err) |
1646 | goto err; |
1647 | |
1648 | if (oldcard) { |
1649 | if (memcmp(p: cid, q: oldcard->raw_cid, size: sizeof(cid)) != 0) { |
1650 | pr_debug("%s: Perhaps the card was replaced\n", |
1651 | mmc_hostname(host)); |
1652 | err = -ENOENT; |
1653 | goto err; |
1654 | } |
1655 | |
1656 | card = oldcard; |
1657 | } else { |
1658 | /* |
1659 | * Allocate card structure. |
1660 | */ |
1661 | card = mmc_alloc_card(host, type: &mmc_type); |
1662 | if (IS_ERR(ptr: card)) { |
1663 | err = PTR_ERR(ptr: card); |
1664 | goto err; |
1665 | } |
1666 | |
1667 | card->ocr = ocr; |
1668 | card->type = MMC_TYPE_MMC; |
1669 | card->rca = 1; |
1670 | memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); |
1671 | } |
1672 | |
1673 | /* |
1674 | * Call the optional HC's init_card function to handle quirks. |
1675 | */ |
1676 | if (host->ops->init_card) |
1677 | host->ops->init_card(host, card); |
1678 | |
1679 | /* |
1680 | * For native busses: set card RCA and quit open drain mode. |
1681 | */ |
1682 | if (!mmc_host_is_spi(host)) { |
1683 | err = mmc_set_relative_addr(card); |
1684 | if (err) |
1685 | goto free_card; |
1686 | |
1687 | mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); |
1688 | } |
1689 | |
1690 | if (!oldcard) { |
1691 | /* |
1692 | * Fetch CSD from card. |
1693 | */ |
1694 | err = mmc_send_csd(card, csd: card->raw_csd); |
1695 | if (err) |
1696 | goto free_card; |
1697 | |
1698 | err = mmc_decode_csd(card); |
1699 | if (err) |
1700 | goto free_card; |
1701 | err = mmc_decode_cid(card); |
1702 | if (err) |
1703 | goto free_card; |
1704 | } |
1705 | |
1706 | /* |
1707 | * handling only for cards supporting DSR and hosts requesting |
1708 | * DSR configuration |
1709 | */ |
1710 | if (card->csd.dsr_imp && host->dsr_req) |
1711 | mmc_set_dsr(host); |
1712 | |
1713 | /* |
1714 | * Select card, as all following commands rely on that. |
1715 | */ |
1716 | if (!mmc_host_is_spi(host)) { |
1717 | err = mmc_select_card(card); |
1718 | if (err) |
1719 | goto free_card; |
1720 | } |
1721 | |
1722 | if (!oldcard) { |
1723 | /* Read extended CSD. */ |
1724 | err = mmc_read_ext_csd(card); |
1725 | if (err) |
1726 | goto free_card; |
1727 | |
1728 | /* |
1729 | * If doing byte addressing, check if required to do sector |
1730 | * addressing. Handle the case of <2GB cards needing sector |
1731 | * addressing. See section 8.1 JEDEC Standard JED84-A441; |
1732 | * ocr register has bit 30 set for sector addressing. |
1733 | */ |
1734 | if (rocr & BIT(30)) |
1735 | mmc_card_set_blockaddr(card); |
1736 | |
1737 | /* Erase size depends on CSD and Extended CSD */ |
1738 | mmc_set_erase_size(card); |
1739 | } |
1740 | |
1741 | /* |
1742 | * Reselect the card type since host caps could have been changed when |
1743 | * debugging even if the card is not new. |
1744 | */ |
1745 | mmc_select_card_type(card); |
1746 | |
1747 | /* Enable ERASE_GRP_DEF. This bit is lost after a reset or power off. */ |
1748 | if (card->ext_csd.rev >= 3) { |
1749 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
1750 | EXT_CSD_ERASE_GROUP_DEF, value: 1, |
1751 | timeout_ms: card->ext_csd.generic_cmd6_time); |
1752 | |
1753 | if (err && err != -EBADMSG) |
1754 | goto free_card; |
1755 | |
1756 | if (err) { |
1757 | /* |
1758 | * Just disable enhanced area off & sz |
1759 | * will try to enable ERASE_GROUP_DEF |
1760 | * during next time reinit |
1761 | */ |
1762 | card->ext_csd.enhanced_area_offset = -EINVAL; |
1763 | card->ext_csd.enhanced_area_size = -EINVAL; |
1764 | } else { |
1765 | card->ext_csd.erase_group_def = 1; |
1766 | /* |
1767 | * enable ERASE_GRP_DEF successfully. |
1768 | * This will affect the erase size, so |
1769 | * here need to reset erase size |
1770 | */ |
1771 | mmc_set_erase_size(card); |
1772 | } |
1773 | } |
1774 | mmc_set_wp_grp_size(card); |
1775 | /* |
1776 | * Ensure eMMC user default partition is enabled |
1777 | */ |
1778 | if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) { |
1779 | card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK; |
1780 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG, |
1781 | value: card->ext_csd.part_config, |
1782 | timeout_ms: card->ext_csd.part_time); |
1783 | if (err && err != -EBADMSG) |
1784 | goto free_card; |
1785 | } |
1786 | |
1787 | /* |
1788 | * Enable power_off_notification byte in the ext_csd register |
1789 | */ |
1790 | if (card->ext_csd.rev >= 6) { |
1791 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
1792 | EXT_CSD_POWER_OFF_NOTIFICATION, |
1793 | EXT_CSD_POWER_ON, |
1794 | timeout_ms: card->ext_csd.generic_cmd6_time); |
1795 | if (err && err != -EBADMSG) |
1796 | goto free_card; |
1797 | |
1798 | /* |
1799 | * The err can be -EBADMSG or 0, |
1800 | * so check for success and update the flag |
1801 | */ |
1802 | if (!err) |
1803 | card->ext_csd.power_off_notification = EXT_CSD_POWER_ON; |
1804 | } |
1805 | |
1806 | /* set erase_arg */ |
1807 | if (mmc_card_can_discard(card)) |
1808 | card->erase_arg = MMC_DISCARD_ARG; |
1809 | else if (mmc_card_can_trim(card)) |
1810 | card->erase_arg = MMC_TRIM_ARG; |
1811 | else |
1812 | card->erase_arg = MMC_ERASE_ARG; |
1813 | |
1814 | /* |
1815 | * Select timing interface |
1816 | */ |
1817 | err = mmc_select_timing(card); |
1818 | if (err) |
1819 | goto free_card; |
1820 | |
1821 | if (mmc_card_hs200(card)) { |
1822 | host->doing_init_tune = 1; |
1823 | |
1824 | err = mmc_hs200_tuning(card); |
1825 | if (!err) |
1826 | err = mmc_select_hs400(card); |
1827 | |
1828 | host->doing_init_tune = 0; |
1829 | |
1830 | if (err) |
1831 | goto free_card; |
1832 | } else if (mmc_card_hs400es(card)) { |
1833 | if (host->ops->execute_hs400_tuning) { |
1834 | err = host->ops->execute_hs400_tuning(host, card); |
1835 | if (err) |
1836 | goto free_card; |
1837 | } |
1838 | } else { |
1839 | /* Select the desired bus width optionally */ |
1840 | err = mmc_select_bus_width(card); |
1841 | if (err > 0 && mmc_card_hs(card)) { |
1842 | err = mmc_select_hs_ddr(card); |
1843 | if (err) |
1844 | goto free_card; |
1845 | } |
1846 | } |
1847 | |
1848 | /* |
1849 | * Choose the power class with selected bus interface |
1850 | */ |
1851 | mmc_select_powerclass(card); |
1852 | |
1853 | /* |
1854 | * Enable HPI feature (if supported) |
1855 | */ |
1856 | if (card->ext_csd.hpi) { |
1857 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
1858 | EXT_CSD_HPI_MGMT, value: 1, |
1859 | timeout_ms: card->ext_csd.generic_cmd6_time); |
1860 | if (err && err != -EBADMSG) |
1861 | goto free_card; |
1862 | if (err) { |
1863 | pr_warn("%s: Enabling HPI failed\n", |
1864 | mmc_hostname(card->host)); |
1865 | card->ext_csd.hpi_en = 0; |
1866 | } else { |
1867 | card->ext_csd.hpi_en = 1; |
1868 | } |
1869 | } |
1870 | |
1871 | /* |
1872 | * If cache size is higher than 0, this indicates the existence of cache |
1873 | * and it can be turned on. Note that some eMMCs from Micron has been |
1874 | * reported to need ~800 ms timeout, while enabling the cache after |
1875 | * sudden power failure tests. Let's extend the timeout to a minimum of |
1876 | * DEFAULT_CACHE_EN_TIMEOUT_MS and do it for all cards. |
1877 | */ |
1878 | if (card->ext_csd.cache_size > 0) { |
1879 | unsigned int timeout_ms = MIN_CACHE_EN_TIMEOUT_MS; |
1880 | |
1881 | timeout_ms = max(card->ext_csd.generic_cmd6_time, timeout_ms); |
1882 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
1883 | EXT_CSD_CACHE_CTRL, value: 1, timeout_ms); |
1884 | if (err && err != -EBADMSG) |
1885 | goto free_card; |
1886 | |
1887 | /* |
1888 | * Only if no error, cache is turned on successfully. |
1889 | */ |
1890 | if (err) { |
1891 | pr_warn("%s: Cache is supported, but failed to turn on (%d)\n", |
1892 | mmc_hostname(card->host), err); |
1893 | card->ext_csd.cache_ctrl = 0; |
1894 | } else { |
1895 | card->ext_csd.cache_ctrl = 1; |
1896 | } |
1897 | } |
1898 | |
1899 | /* |
1900 | * Enable Command Queue if supported. Note that Packed Commands cannot |
1901 | * be used with Command Queue. |
1902 | */ |
1903 | card->ext_csd.cmdq_en = false; |
1904 | if (card->ext_csd.cmdq_support && host->caps2 & MMC_CAP2_CQE) { |
1905 | err = mmc_cmdq_enable(card); |
1906 | if (err && err != -EBADMSG) |
1907 | goto free_card; |
1908 | if (err) { |
1909 | pr_warn("%s: Enabling CMDQ failed\n", |
1910 | mmc_hostname(card->host)); |
1911 | card->ext_csd.cmdq_support = false; |
1912 | card->ext_csd.cmdq_depth = 0; |
1913 | } |
1914 | } |
1915 | /* |
1916 | * In some cases (e.g. RPMB or mmc_test), the Command Queue must be |
1917 | * disabled for a time, so a flag is needed to indicate to re-enable the |
1918 | * Command Queue. |
1919 | */ |
1920 | card->reenable_cmdq = card->ext_csd.cmdq_en; |
1921 | |
1922 | if (host->cqe_ops && !host->cqe_enabled) { |
1923 | err = host->cqe_ops->cqe_enable(host, card); |
1924 | if (!err) { |
1925 | host->cqe_enabled = true; |
1926 | |
1927 | if (card->ext_csd.cmdq_en) { |
1928 | pr_info("%s: Command Queue Engine enabled\n", |
1929 | mmc_hostname(host)); |
1930 | } else { |
1931 | host->hsq_enabled = true; |
1932 | pr_info("%s: Host Software Queue enabled\n", |
1933 | mmc_hostname(host)); |
1934 | } |
1935 | } |
1936 | } |
1937 | |
1938 | if (host->caps2 & MMC_CAP2_AVOID_3_3V && |
1939 | host->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) { |
1940 | pr_err("%s: Host failed to negotiate down from 3.3V\n", |
1941 | mmc_hostname(host)); |
1942 | err = -EINVAL; |
1943 | goto free_card; |
1944 | } |
1945 | |
1946 | if (!oldcard) |
1947 | host->card = card; |
1948 | |
1949 | return 0; |
1950 | |
1951 | free_card: |
1952 | if (!oldcard) |
1953 | mmc_remove_card(card); |
1954 | err: |
1955 | return err; |
1956 | } |
1957 | |
1958 | static bool mmc_card_can_sleep(struct mmc_card *card) |
1959 | { |
1960 | return card->ext_csd.rev >= 3; |
1961 | } |
1962 | |
1963 | static int mmc_sleep_busy_cb(void *cb_data, bool *busy) |
1964 | { |
1965 | struct mmc_host *host = cb_data; |
1966 | |
1967 | *busy = host->ops->card_busy(host); |
1968 | return 0; |
1969 | } |
1970 | |
1971 | static int mmc_sleep(struct mmc_host *host) |
1972 | { |
1973 | struct mmc_command cmd = {}; |
1974 | struct mmc_card *card = host->card; |
1975 | unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000); |
1976 | bool use_r1b_resp; |
1977 | int err; |
1978 | |
1979 | /* Re-tuning can't be done once the card is deselected */ |
1980 | mmc_retune_hold(host); |
1981 | |
1982 | err = mmc_deselect_cards(host); |
1983 | if (err) |
1984 | goto out_release; |
1985 | |
1986 | cmd.opcode = MMC_SLEEP_AWAKE; |
1987 | cmd.arg = card->rca << 16; |
1988 | cmd.arg |= 1 << 15; |
1989 | use_r1b_resp = mmc_prepare_busy_cmd(host, cmd: &cmd, timeout_ms); |
1990 | |
1991 | err = mmc_wait_for_cmd(host, cmd: &cmd, retries: 0); |
1992 | if (err) |
1993 | goto out_release; |
1994 | |
1995 | /* |
1996 | * If the host does not wait while the card signals busy, then we can |
1997 | * try to poll, but only if the host supports HW polling, as the |
1998 | * SEND_STATUS cmd is not allowed. If we can't poll, then we simply need |
1999 | * to wait the sleep/awake timeout. |
2000 | */ |
2001 | if (host->caps & MMC_CAP_WAIT_WHILE_BUSY && use_r1b_resp) |
2002 | goto out_release; |
2003 | |
2004 | if (!host->ops->card_busy) { |
2005 | mmc_delay(ms: timeout_ms); |
2006 | goto out_release; |
2007 | } |
2008 | |
2009 | err = __mmc_poll_for_busy(host, period_us: 0, timeout_ms, busy_cb: &mmc_sleep_busy_cb, cb_data: host); |
2010 | |
2011 | out_release: |
2012 | mmc_retune_release(host); |
2013 | return err; |
2014 | } |
2015 | |
2016 | static bool mmc_card_can_poweroff_notify(const struct mmc_card *card) |
2017 | { |
2018 | return card && |
2019 | mmc_card_mmc(card) && |
2020 | (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON); |
2021 | } |
2022 | |
2023 | static bool mmc_host_can_poweroff_notify(const struct mmc_host *host, |
2024 | enum mmc_poweroff_type pm_type) |
2025 | { |
2026 | if (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) |
2027 | return true; |
2028 | |
2029 | if (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE_IN_SUSPEND && |
2030 | pm_type == MMC_POWEROFF_SUSPEND) |
2031 | return true; |
2032 | |
2033 | return pm_type == MMC_POWEROFF_SHUTDOWN; |
2034 | } |
2035 | |
2036 | static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type) |
2037 | { |
2038 | unsigned int timeout = card->ext_csd.generic_cmd6_time; |
2039 | int err; |
2040 | |
2041 | /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */ |
2042 | if (notify_type == EXT_CSD_POWER_OFF_LONG) |
2043 | timeout = card->ext_csd.power_off_longtime; |
2044 | |
2045 | err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
2046 | EXT_CSD_POWER_OFF_NOTIFICATION, |
2047 | value: notify_type, timeout_ms: timeout, timing: 0, send_status: false, retry_crc_err: false, MMC_CMD_RETRIES); |
2048 | if (err) |
2049 | pr_err("%s: Power Off Notification timed out, %u\n", |
2050 | mmc_hostname(card->host), timeout); |
2051 | |
2052 | /* Disable the power off notification after the switch operation. */ |
2053 | card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION; |
2054 | |
2055 | return err; |
2056 | } |
2057 | |
2058 | /* |
2059 | * Card detection - card is alive. |
2060 | */ |
2061 | static int mmc_alive(struct mmc_host *host) |
2062 | { |
2063 | return mmc_send_status(card: host->card, NULL); |
2064 | } |
2065 | |
2066 | /* |
2067 | * Card detection callback from host. |
2068 | */ |
2069 | static void mmc_detect(struct mmc_host *host) |
2070 | { |
2071 | int err; |
2072 | |
2073 | mmc_get_card(card: host->card, NULL); |
2074 | |
2075 | /* |
2076 | * Just check if our card has been removed. |
2077 | */ |
2078 | err = _mmc_detect_card_removed(host); |
2079 | |
2080 | mmc_put_card(card: host->card, NULL); |
2081 | |
2082 | if (err) { |
2083 | mmc_remove_card(card: host->card); |
2084 | host->card = NULL; |
2085 | |
2086 | mmc_claim_host(host); |
2087 | mmc_detach_bus(host); |
2088 | mmc_power_off(host); |
2089 | mmc_release_host(host); |
2090 | } |
2091 | } |
2092 | |
2093 | static bool _mmc_cache_enabled(struct mmc_host *host) |
2094 | { |
2095 | return host->card->ext_csd.cache_size > 0 && |
2096 | host->card->ext_csd.cache_ctrl & 1; |
2097 | } |
2098 | |
2099 | /* |
2100 | * Flush the internal cache of the eMMC to non-volatile storage. |
2101 | */ |
2102 | static int _mmc_flush_cache(struct mmc_host *host) |
2103 | { |
2104 | int err = 0; |
2105 | |
2106 | if (mmc_card_broken_cache_flush(c: host->card) && !host->card->written_flag) |
2107 | return 0; |
2108 | |
2109 | if (_mmc_cache_enabled(host)) { |
2110 | err = mmc_switch(card: host->card, EXT_CSD_CMD_SET_NORMAL, |
2111 | EXT_CSD_FLUSH_CACHE, value: 1, |
2112 | CACHE_FLUSH_TIMEOUT_MS); |
2113 | if (err) |
2114 | pr_err("%s: cache flush error %d\n", mmc_hostname(host), err); |
2115 | else |
2116 | host->card->written_flag = false; |
2117 | } |
2118 | |
2119 | return err; |
2120 | } |
2121 | |
2122 | static int _mmc_suspend(struct mmc_host *host, enum mmc_poweroff_type pm_type) |
2123 | { |
2124 | unsigned int notify_type = EXT_CSD_POWER_OFF_SHORT; |
2125 | int err = 0; |
2126 | |
2127 | if (pm_type == MMC_POWEROFF_SHUTDOWN) |
2128 | notify_type = EXT_CSD_POWER_OFF_LONG; |
2129 | |
2130 | mmc_claim_host(host); |
2131 | |
2132 | if (mmc_card_suspended(host->card)) |
2133 | goto out; |
2134 | |
2135 | err = _mmc_flush_cache(host); |
2136 | if (err) |
2137 | goto out; |
2138 | |
2139 | if (mmc_card_can_poweroff_notify(card: host->card) && |
2140 | mmc_host_can_poweroff_notify(host, pm_type)) |
2141 | err = mmc_poweroff_notify(card: host->card, notify_type); |
2142 | else if (mmc_card_can_sleep(card: host->card)) |
2143 | err = mmc_sleep(host); |
2144 | else if (!mmc_host_is_spi(host)) |
2145 | err = mmc_deselect_cards(host); |
2146 | |
2147 | if (!err) { |
2148 | mmc_power_off(host); |
2149 | mmc_card_set_suspended(host->card); |
2150 | } |
2151 | out: |
2152 | mmc_release_host(host); |
2153 | return err; |
2154 | } |
2155 | |
2156 | /* |
2157 | * Host is being removed. Free up the current card and do a graceful power-off. |
2158 | */ |
2159 | static void mmc_remove(struct mmc_host *host) |
2160 | { |
2161 | get_device(dev: &host->card->dev); |
2162 | mmc_remove_card(card: host->card); |
2163 | |
2164 | _mmc_suspend(host, pm_type: MMC_POWEROFF_UNBIND); |
2165 | |
2166 | put_device(dev: &host->card->dev); |
2167 | host->card = NULL; |
2168 | } |
2169 | |
2170 | /* |
2171 | * Suspend callback |
2172 | */ |
2173 | static int mmc_suspend(struct mmc_host *host) |
2174 | { |
2175 | int err; |
2176 | |
2177 | err = _mmc_suspend(host, pm_type: MMC_POWEROFF_SUSPEND); |
2178 | if (!err) { |
2179 | pm_runtime_disable(dev: &host->card->dev); |
2180 | pm_runtime_set_suspended(dev: &host->card->dev); |
2181 | } |
2182 | |
2183 | return err; |
2184 | } |
2185 | |
2186 | /* |
2187 | * This function tries to determine if the same card is still present |
2188 | * and, if so, restore all state to it. |
2189 | */ |
2190 | static int _mmc_resume(struct mmc_host *host) |
2191 | { |
2192 | int err = 0; |
2193 | |
2194 | mmc_claim_host(host); |
2195 | |
2196 | if (!mmc_card_suspended(host->card)) |
2197 | goto out; |
2198 | |
2199 | mmc_power_up(host, ocr: host->card->ocr); |
2200 | err = mmc_init_card(host, ocr: host->card->ocr, oldcard: host->card); |
2201 | mmc_card_clr_suspended(host->card); |
2202 | |
2203 | out: |
2204 | mmc_release_host(host); |
2205 | return err; |
2206 | } |
2207 | |
2208 | /* |
2209 | * Shutdown callback |
2210 | */ |
2211 | static int mmc_shutdown(struct mmc_host *host) |
2212 | { |
2213 | int err = 0; |
2214 | |
2215 | /* |
2216 | * If the card remains suspended at this point and it was done by using |
2217 | * the sleep-cmd (CMD5), we may need to re-initialize it first, to allow |
2218 | * us to send the preferred poweroff-notification cmd at shutdown. |
2219 | */ |
2220 | if (mmc_card_can_poweroff_notify(card: host->card) && |
2221 | !mmc_host_can_poweroff_notify(host, pm_type: MMC_POWEROFF_SUSPEND)) |
2222 | err = _mmc_resume(host); |
2223 | |
2224 | if (!err) |
2225 | err = _mmc_suspend(host, pm_type: MMC_POWEROFF_SHUTDOWN); |
2226 | |
2227 | return err; |
2228 | } |
2229 | |
2230 | /* |
2231 | * Callback for resume. |
2232 | */ |
2233 | static int mmc_resume(struct mmc_host *host) |
2234 | { |
2235 | pm_runtime_enable(dev: &host->card->dev); |
2236 | return 0; |
2237 | } |
2238 | |
2239 | /* |
2240 | * Callback for runtime_suspend. |
2241 | */ |
2242 | static int mmc_runtime_suspend(struct mmc_host *host) |
2243 | { |
2244 | int err; |
2245 | |
2246 | if (!(host->caps & MMC_CAP_AGGRESSIVE_PM)) |
2247 | return 0; |
2248 | |
2249 | err = _mmc_suspend(host, pm_type: MMC_POWEROFF_SUSPEND); |
2250 | if (err) |
2251 | pr_err("%s: error %d doing aggressive suspend\n", |
2252 | mmc_hostname(host), err); |
2253 | |
2254 | return err; |
2255 | } |
2256 | |
2257 | /* |
2258 | * Callback for runtime_resume. |
2259 | */ |
2260 | static int mmc_runtime_resume(struct mmc_host *host) |
2261 | { |
2262 | int err; |
2263 | |
2264 | err = _mmc_resume(host); |
2265 | if (err && err != -ENOMEDIUM) |
2266 | pr_err("%s: error %d doing runtime resume\n", |
2267 | mmc_hostname(host), err); |
2268 | |
2269 | return 0; |
2270 | } |
2271 | |
2272 | static bool mmc_card_can_reset(struct mmc_card *card) |
2273 | { |
2274 | u8 rst_n_function; |
2275 | |
2276 | rst_n_function = card->ext_csd.rst_n_function; |
2277 | return ((rst_n_function & EXT_CSD_RST_N_EN_MASK) == EXT_CSD_RST_N_ENABLED); |
2278 | } |
2279 | |
2280 | static int _mmc_hw_reset(struct mmc_host *host) |
2281 | { |
2282 | struct mmc_card *card = host->card; |
2283 | |
2284 | /* |
2285 | * In the case of recovery, we can't expect flushing the cache to work |
2286 | * always, but we have a go and ignore errors. |
2287 | */ |
2288 | _mmc_flush_cache(host); |
2289 | |
2290 | if ((host->caps & MMC_CAP_HW_RESET) && host->ops->card_hw_reset && |
2291 | mmc_card_can_reset(card)) { |
2292 | /* If the card accept RST_n signal, send it. */ |
2293 | mmc_set_clock(host, hz: host->f_init); |
2294 | host->ops->card_hw_reset(host); |
2295 | /* Set initial state and call mmc_set_ios */ |
2296 | mmc_set_initial_state(host); |
2297 | } else { |
2298 | /* Do a brute force power cycle */ |
2299 | mmc_power_cycle(host, ocr: card->ocr); |
2300 | mmc_pwrseq_reset(host); |
2301 | } |
2302 | return mmc_init_card(host, ocr: card->ocr, oldcard: card); |
2303 | } |
2304 | |
2305 | static const struct mmc_bus_ops mmc_ops = { |
2306 | .remove = mmc_remove, |
2307 | .detect = mmc_detect, |
2308 | .suspend = mmc_suspend, |
2309 | .resume = mmc_resume, |
2310 | .runtime_suspend = mmc_runtime_suspend, |
2311 | .runtime_resume = mmc_runtime_resume, |
2312 | .alive = mmc_alive, |
2313 | .shutdown = mmc_shutdown, |
2314 | .hw_reset = _mmc_hw_reset, |
2315 | .cache_enabled = _mmc_cache_enabled, |
2316 | .flush_cache = _mmc_flush_cache, |
2317 | }; |
2318 | |
2319 | /* |
2320 | * Starting point for MMC card init. |
2321 | */ |
2322 | int mmc_attach_mmc(struct mmc_host *host) |
2323 | { |
2324 | int err; |
2325 | u32 ocr, rocr; |
2326 | |
2327 | WARN_ON(!host->claimed); |
2328 | |
2329 | /* Set correct bus mode for MMC before attempting attach */ |
2330 | if (!mmc_host_is_spi(host)) |
2331 | mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN); |
2332 | |
2333 | err = mmc_send_op_cond(host, ocr: 0, rocr: &ocr); |
2334 | if (err) |
2335 | return err; |
2336 | |
2337 | mmc_attach_bus(host, ops: &mmc_ops); |
2338 | if (host->ocr_avail_mmc) |
2339 | host->ocr_avail = host->ocr_avail_mmc; |
2340 | |
2341 | /* |
2342 | * We need to get OCR a different way for SPI. |
2343 | */ |
2344 | if (mmc_host_is_spi(host)) { |
2345 | err = mmc_spi_read_ocr(host, highcap: 1, ocrp: &ocr); |
2346 | if (err) |
2347 | goto err; |
2348 | } |
2349 | |
2350 | rocr = mmc_select_voltage(host, ocr); |
2351 | |
2352 | /* |
2353 | * Can we support the voltage of the card? |
2354 | */ |
2355 | if (!rocr) { |
2356 | err = -EINVAL; |
2357 | goto err; |
2358 | } |
2359 | |
2360 | /* |
2361 | * Detect and init the card. |
2362 | */ |
2363 | err = mmc_init_card(host, ocr: rocr, NULL); |
2364 | if (err) |
2365 | goto err; |
2366 | |
2367 | mmc_release_host(host); |
2368 | err = mmc_add_card(card: host->card); |
2369 | if (err) |
2370 | goto remove_card; |
2371 | |
2372 | mmc_claim_host(host); |
2373 | return 0; |
2374 | |
2375 | remove_card: |
2376 | mmc_remove_card(card: host->card); |
2377 | mmc_claim_host(host); |
2378 | host->card = NULL; |
2379 | err: |
2380 | mmc_detach_bus(host); |
2381 | |
2382 | pr_err("%s: error %d whilst initialising MMC card\n", |
2383 | mmc_hostname(host), err); |
2384 | |
2385 | return err; |
2386 | } |
2387 |
Definitions
- mmc_poweroff_type
- tran_exp
- tran_mant
- taac_exp
- taac_mant
- mmc_decode_cid
- mmc_set_erase_size
- mmc_set_wp_grp_size
- mmc_decode_csd
- mmc_select_card_type
- mmc_manage_enhanced_area
- mmc_part_add
- mmc_manage_gp_partitions
- mmc_decode_ext_csd
- mmc_read_ext_csd
- mmc_compare_ext_csds
- mmc_fwrev_show
- mmc_dsr_show
- mmc_std_attrs
- mmc_type
- __mmc_select_powerclass
- mmc_select_powerclass
- mmc_set_bus_speed
- mmc_select_bus_width
- mmc_select_hs
- mmc_select_hs_ddr
- mmc_select_hs400
- mmc_hs200_to_hs400
- mmc_hs400_to_hs200
- mmc_select_driver_type
- mmc_select_hs400es
- mmc_select_hs200
- mmc_select_timing
- mmc_hs200_tuning
- mmc_init_card
- mmc_card_can_sleep
- mmc_sleep_busy_cb
- mmc_sleep
- mmc_card_can_poweroff_notify
- mmc_host_can_poweroff_notify
- mmc_poweroff_notify
- mmc_alive
- mmc_detect
- _mmc_cache_enabled
- _mmc_flush_cache
- _mmc_suspend
- mmc_remove
- mmc_suspend
- _mmc_resume
- mmc_shutdown
- mmc_resume
- mmc_runtime_suspend
- mmc_runtime_resume
- mmc_card_can_reset
- _mmc_hw_reset
- mmc_ops
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