Lines Matching full:mtd
3 * Core registration and callback routines for MTD
34 #include <linux/mtd/mtd.h>
35 #include <linux/mtd/partitions.h>
45 struct mtd_info *mtd = dev_get_drvdata(dev); in mtd_cls_suspend() local
47 return mtd ? mtd_suspend(mtd) : 0; in mtd_cls_suspend()
52 struct mtd_info *mtd = dev_get_drvdata(dev); in mtd_cls_resume() local
54 if (mtd) in mtd_cls_resume()
55 mtd_resume(mtd); in mtd_cls_resume()
66 .name = "mtd",
88 /* REVISIT once MTD uses the driver model better, whoever allocates
93 struct mtd_info *mtd = dev_get_drvdata(dev); in mtd_release() local
94 dev_t index = MTD_DEVT(mtd->index); in mtd_release()
96 idr_remove(&mtd_idr, mtd->index); in mtd_release()
97 of_node_put(mtd_get_of_node(mtd)); in mtd_release()
99 if (mtd_is_partition(mtd)) in mtd_release()
100 release_mtd_partition(mtd); in mtd_release()
108 struct mtd_info *mtd = container_of(kref, struct mtd_info, refcnt); in mtd_device_release() local
109 bool is_partition = mtd_is_partition(mtd); in mtd_device_release()
111 debugfs_remove_recursive(mtd->dbg.dfs_dir); in mtd_device_release()
114 nvmem_unregister(mtd->nvmem); in mtd_device_release()
116 device_unregister(&mtd->dev); in mtd_device_release()
119 * Clear dev so mtd can be safely re-registered later if desired. in mtd_device_release()
124 memset(&mtd->dev, 0, sizeof(mtd->dev)); in mtd_device_release()
138 struct mtd_info *mtd = dev_get_drvdata(dev); in mtd_type_show() local
141 switch (mtd->type) { in mtd_type_show()
177 struct mtd_info *mtd = dev_get_drvdata(dev); in mtd_flags_show() local
179 return sysfs_emit(buf, "0x%lx\n", (unsigned long)mtd->flags); in mtd_flags_show()
186 struct mtd_info *mtd = dev_get_drvdata(dev); in mtd_size_show() local
188 return sysfs_emit(buf, "%llu\n", (unsigned long long)mtd->size); in mtd_size_show()
195 struct mtd_info *mtd = dev_get_drvdata(dev); in mtd_erasesize_show() local
197 return sysfs_emit(buf, "%lu\n", (unsigned long)mtd->erasesize); in mtd_erasesize_show()
204 struct mtd_info *mtd = dev_get_drvdata(dev); in mtd_writesize_show() local
206 return sysfs_emit(buf, "%lu\n", (unsigned long)mtd->writesize); in mtd_writesize_show()
213 struct mtd_info *mtd = dev_get_drvdata(dev); in mtd_subpagesize_show() local
214 unsigned int subpagesize = mtd->writesize >> mtd->subpage_sft; in mtd_subpagesize_show()
223 struct mtd_info *mtd = dev_get_drvdata(dev); in mtd_oobsize_show() local
225 return sysfs_emit(buf, "%lu\n", (unsigned long)mtd->oobsize); in mtd_oobsize_show()
232 struct mtd_info *mtd = dev_get_drvdata(dev); in mtd_oobavail_show() local
234 return sysfs_emit(buf, "%u\n", mtd->oobavail); in mtd_oobavail_show()
241 struct mtd_info *mtd = dev_get_drvdata(dev); in mtd_numeraseregions_show() local
243 return sysfs_emit(buf, "%u\n", mtd->numeraseregions); in mtd_numeraseregions_show()
250 struct mtd_info *mtd = dev_get_drvdata(dev); in mtd_name_show() local
252 return sysfs_emit(buf, "%s\n", mtd->name); in mtd_name_show()
259 struct mtd_info *mtd = dev_get_drvdata(dev); in mtd_ecc_strength_show() local
261 return sysfs_emit(buf, "%u\n", mtd->ecc_strength); in mtd_ecc_strength_show()
269 struct mtd_info *mtd = dev_get_drvdata(dev); in mtd_bitflip_threshold_show() local
271 return sysfs_emit(buf, "%u\n", mtd->bitflip_threshold); in mtd_bitflip_threshold_show()
278 struct mtd_info *mtd = dev_get_drvdata(dev); in mtd_bitflip_threshold_store() local
286 mtd->bitflip_threshold = bitflip_threshold; in mtd_bitflip_threshold_store()
294 struct mtd_info *mtd = dev_get_drvdata(dev); in mtd_ecc_step_size_show() local
296 return sysfs_emit(buf, "%u\n", mtd->ecc_step_size); in mtd_ecc_step_size_show()
304 struct mtd_info *mtd = dev_get_drvdata(dev); in mtd_corrected_bits_show() local
305 struct mtd_ecc_stats *ecc_stats = &mtd->ecc_stats; in mtd_corrected_bits_show()
314 struct mtd_info *mtd = dev_get_drvdata(dev); in mtd_ecc_failures_show() local
315 struct mtd_ecc_stats *ecc_stats = &mtd->ecc_stats; in mtd_ecc_failures_show()
324 struct mtd_info *mtd = dev_get_drvdata(dev); in mtd_bad_blocks_show() local
325 struct mtd_ecc_stats *ecc_stats = &mtd->ecc_stats; in mtd_bad_blocks_show()
334 struct mtd_info *mtd = dev_get_drvdata(dev); in mtd_bbt_blocks_show() local
335 struct mtd_ecc_stats *ecc_stats = &mtd->ecc_stats; in mtd_bbt_blocks_show()
361 ATTRIBUTE_GROUPS(mtd);
364 .name = "mtd",
386 static void mtd_debugfs_populate(struct mtd_info *mtd) in mtd_debugfs_populate() argument
388 struct device *dev = &mtd->dev; in mtd_debugfs_populate()
393 mtd->dbg.dfs_dir = debugfs_create_dir(dev_name(dev), dfs_dir_mtd); in mtd_debugfs_populate()
397 unsigned mtd_mmap_capabilities(struct mtd_info *mtd) in mtd_mmap_capabilities() argument
399 switch (mtd->type) { in mtd_mmap_capabilities()
416 struct mtd_info *mtd; in mtd_reboot_notifier() local
418 mtd = container_of(n, struct mtd_info, reboot_notifier); in mtd_reboot_notifier()
419 mtd->_reboot(mtd); in mtd_reboot_notifier()
426 * @mtd: pointer to new MTD device info structure
441 * From the pairing info the MTD user can find all the wunits paired with
444 * for (i = 0; i < mtd_pairing_groups(mtd); i++) {
446 * mtd_pairing_info_to_wunit(mtd, &info);
450 int mtd_wunit_to_pairing_info(struct mtd_info *mtd, int wunit, in mtd_wunit_to_pairing_info() argument
453 struct mtd_info *master = mtd_get_master(mtd); in mtd_wunit_to_pairing_info()
471 * @mtd: pointer to new MTD device info structure
486 * npairs = mtd_wunit_per_eb(mtd) / mtd_pairing_groups(mtd);
488 * wunit = mtd_pairing_info_to_wunit(mtd, &info);
489 * mtd_write(mtd, mtd_wunit_to_offset(mtd, blkoffs, wunit),
490 * mtd->writesize, &retlen, buf + (i * mtd->writesize));
493 int mtd_pairing_info_to_wunit(struct mtd_info *mtd, in mtd_pairing_info_to_wunit() argument
496 struct mtd_info *master = mtd_get_master(mtd); in mtd_pairing_info_to_wunit()
505 return mtd->pairing->get_wunit(master, info); in mtd_pairing_info_to_wunit()
513 * @mtd: pointer to new MTD device info structure
521 int mtd_pairing_groups(struct mtd_info *mtd) in mtd_pairing_groups() argument
523 struct mtd_info *master = mtd_get_master(mtd); in mtd_pairing_groups()
535 struct mtd_info *mtd = priv; in mtd_nvmem_reg_read() local
539 err = mtd_read(mtd, offset, bytes, &retlen, val); in mtd_nvmem_reg_read()
546 static int mtd_nvmem_add(struct mtd_info *mtd) in mtd_nvmem_add() argument
548 struct device_node *node = mtd_get_of_node(mtd); in mtd_nvmem_add()
552 config.dev = &mtd->dev; in mtd_nvmem_add()
553 config.name = dev_name(&mtd->dev); in mtd_nvmem_add()
556 config.size = mtd->size; in mtd_nvmem_add()
563 config.priv = mtd; in mtd_nvmem_add()
565 mtd->nvmem = nvmem_register(&config); in mtd_nvmem_add()
566 if (IS_ERR(mtd->nvmem)) { in mtd_nvmem_add()
568 if (PTR_ERR(mtd->nvmem) == -EOPNOTSUPP) in mtd_nvmem_add()
569 mtd->nvmem = NULL; in mtd_nvmem_add()
571 return dev_err_probe(&mtd->dev, PTR_ERR(mtd->nvmem), in mtd_nvmem_add()
578 static void mtd_check_of_node(struct mtd_info *mtd) in mtd_check_of_node() argument
584 /* Check if MTD already has a device node */ in mtd_check_of_node()
585 if (mtd_get_of_node(mtd)) in mtd_check_of_node()
588 if (!mtd_is_partition(mtd)) in mtd_check_of_node()
591 parent_dn = of_node_get(mtd_get_of_node(mtd->parent)); in mtd_check_of_node()
595 if (mtd_is_partition(mtd->parent)) in mtd_check_of_node()
603 mtd_name_len = strlen(mtd->name); in mtd_check_of_node()
621 !strncmp(mtd->name, pname + offset, plen)) { in mtd_check_of_node()
622 mtd_set_of_node(mtd, mtd_dn); in mtd_check_of_node()
633 * add_mtd_device - register an MTD device
634 * @mtd: pointer to new MTD device info structure
636 * Add a device to the list of MTD devices present in the system, and
637 * notify each currently active MTD 'user' of its arrival. Returns
641 int add_mtd_device(struct mtd_info *mtd) in add_mtd_device() argument
643 struct device_node *np = mtd_get_of_node(mtd); in add_mtd_device()
644 struct mtd_info *master = mtd_get_master(mtd); in add_mtd_device()
650 * mtd_device_parse_register() multiple times on the same master MTD, in add_mtd_device()
653 if (WARN_ONCE(mtd->dev.type, "MTD already registered\n")) in add_mtd_device()
656 BUG_ON(mtd->writesize == 0); in add_mtd_device()
659 * MTD drivers should implement ->_{write,read}() or in add_mtd_device()
662 if (WARN_ON((mtd->_write && mtd->_write_oob) || in add_mtd_device()
663 (mtd->_read && mtd->_read_oob))) in add_mtd_device()
666 if (WARN_ON((!mtd->erasesize || !master->_erase) && in add_mtd_device()
667 !(mtd->flags & MTD_NO_ERASE))) in add_mtd_device()
678 if (mtd->flags & MTD_SLC_ON_MLC_EMULATION && in add_mtd_device()
679 (!mtd_is_partition(mtd) || master->type != MTD_MLCNANDFLASH || in add_mtd_device()
687 ofidx = of_alias_get_id(np, "mtd"); in add_mtd_device()
689 i = idr_alloc(&mtd_idr, mtd, ofidx, ofidx + 1, GFP_KERNEL); in add_mtd_device()
691 i = idr_alloc(&mtd_idr, mtd, 0, 0, GFP_KERNEL); in add_mtd_device()
697 mtd->index = i; in add_mtd_device()
698 kref_init(&mtd->refcnt); in add_mtd_device()
701 if (mtd->bitflip_threshold == 0) in add_mtd_device()
702 mtd->bitflip_threshold = mtd->ecc_strength; in add_mtd_device()
704 if (mtd->flags & MTD_SLC_ON_MLC_EMULATION) { in add_mtd_device()
707 mtd->erasesize /= ngroups; in add_mtd_device()
708 mtd->size = (u64)mtd_div_by_eb(mtd->size, master) * in add_mtd_device()
709 mtd->erasesize; in add_mtd_device()
712 if (is_power_of_2(mtd->erasesize)) in add_mtd_device()
713 mtd->erasesize_shift = ffs(mtd->erasesize) - 1; in add_mtd_device()
715 mtd->erasesize_shift = 0; in add_mtd_device()
717 if (is_power_of_2(mtd->writesize)) in add_mtd_device()
718 mtd->writesize_shift = ffs(mtd->writesize) - 1; in add_mtd_device()
720 mtd->writesize_shift = 0; in add_mtd_device()
722 mtd->erasesize_mask = (1 << mtd->erasesize_shift) - 1; in add_mtd_device()
723 mtd->writesize_mask = (1 << mtd->writesize_shift) - 1; in add_mtd_device()
726 if ((mtd->flags & MTD_WRITEABLE) && (mtd->flags & MTD_POWERUP_LOCK)) { in add_mtd_device()
727 error = mtd_unlock(mtd, 0, mtd->size); in add_mtd_device()
731 mtd->name); in add_mtd_device()
739 mtd->dev.type = &mtd_devtype; in add_mtd_device()
740 mtd->dev.class = &mtd_class; in add_mtd_device()
741 mtd->dev.devt = MTD_DEVT(i); in add_mtd_device()
742 dev_set_name(&mtd->dev, "mtd%d", i); in add_mtd_device()
743 dev_set_drvdata(&mtd->dev, mtd); in add_mtd_device()
744 mtd_check_of_node(mtd); in add_mtd_device()
745 of_node_get(mtd_get_of_node(mtd)); in add_mtd_device()
746 error = device_register(&mtd->dev); in add_mtd_device()
748 put_device(&mtd->dev); in add_mtd_device()
753 error = mtd_nvmem_add(mtd); in add_mtd_device()
757 mtd_debugfs_populate(mtd); in add_mtd_device()
759 device_create(&mtd_class, mtd->dev.parent, MTD_DEVT(i) + 1, NULL, in add_mtd_device()
760 "mtd%dro", i); in add_mtd_device()
762 pr_debug("mtd: Giving out device %d to %s\n", i, mtd->name); in add_mtd_device()
766 not->add(mtd); in add_mtd_device()
770 if (of_property_read_bool(mtd_get_of_node(mtd), "linux,rootfs")) { in add_mtd_device()
772 pr_info("mtd: setting mtd%d (%s) as root device\n", mtd->index, mtd->name); in add_mtd_device()
773 ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, mtd->index); in add_mtd_device()
775 pr_warn("mtd: can't set mtd%d (%s) as root device - mtd must be builtin\n", in add_mtd_device()
776 mtd->index, mtd->name); in add_mtd_device()
788 device_unregister(&mtd->dev); in add_mtd_device()
790 of_node_put(mtd_get_of_node(mtd)); in add_mtd_device()
798 * del_mtd_device - unregister an MTD device
799 * @mtd: pointer to MTD device info structure
801 * Remove a device from the list of MTD devices present in the system,
802 * and notify each currently active MTD 'user' of its departure.
807 int del_mtd_device(struct mtd_info *mtd) in del_mtd_device() argument
814 if (idr_find(&mtd_idr, mtd->index) != mtd) { in del_mtd_device()
822 not->remove(mtd); in del_mtd_device()
824 kref_put(&mtd->refcnt, mtd_device_release); in del_mtd_device()
836 static void mtd_set_dev_defaults(struct mtd_info *mtd) in mtd_set_dev_defaults() argument
838 if (mtd->dev.parent) { in mtd_set_dev_defaults()
839 if (!mtd->owner && mtd->dev.parent->driver) in mtd_set_dev_defaults()
840 mtd->owner = mtd->dev.parent->driver->owner; in mtd_set_dev_defaults()
841 if (!mtd->name) in mtd_set_dev_defaults()
842 mtd->name = dev_name(mtd->dev.parent); in mtd_set_dev_defaults()
844 pr_debug("mtd device won't show a device symlink in sysfs\n"); in mtd_set_dev_defaults()
847 INIT_LIST_HEAD(&mtd->partitions); in mtd_set_dev_defaults()
848 mutex_init(&mtd->master.partitions_lock); in mtd_set_dev_defaults()
849 mutex_init(&mtd->master.chrdev_lock); in mtd_set_dev_defaults()
852 static ssize_t mtd_otp_size(struct mtd_info *mtd, bool is_user) in mtd_otp_size() argument
865 ret = mtd_get_user_prot_info(mtd, PAGE_SIZE, &retlen, info); in mtd_otp_size()
867 ret = mtd_get_fact_prot_info(mtd, PAGE_SIZE, &retlen, info); in mtd_otp_size()
884 static struct nvmem_device *mtd_otp_nvmem_register(struct mtd_info *mtd, in mtd_otp_nvmem_register() argument
894 np = of_get_compatible_child(mtd->dev.of_node, compatible); in mtd_otp_nvmem_register()
897 config.dev = mtd->dev.parent; in mtd_otp_nvmem_register()
907 config.priv = mtd; in mtd_otp_nvmem_register()
922 struct mtd_info *mtd = priv; in mtd_nvmem_user_otp_reg_read() local
926 ret = mtd_read_user_prot_reg(mtd, offset, bytes, &retlen, val); in mtd_nvmem_user_otp_reg_read()
936 struct mtd_info *mtd = priv; in mtd_nvmem_fact_otp_reg_read() local
940 ret = mtd_read_fact_prot_reg(mtd, offset, bytes, &retlen, val); in mtd_nvmem_fact_otp_reg_read()
947 static int mtd_otp_nvmem_add(struct mtd_info *mtd) in mtd_otp_nvmem_add() argument
949 struct device *dev = mtd->dev.parent; in mtd_otp_nvmem_add()
954 if (mtd->_get_user_prot_info && mtd->_read_user_prot_reg) { in mtd_otp_nvmem_add()
955 size = mtd_otp_size(mtd, true); in mtd_otp_nvmem_add()
960 nvmem = mtd_otp_nvmem_register(mtd, "user-otp", size, in mtd_otp_nvmem_add()
966 mtd->otp_user_nvmem = nvmem; in mtd_otp_nvmem_add()
970 if (mtd->_get_fact_prot_info && mtd->_read_fact_prot_reg) { in mtd_otp_nvmem_add()
971 size = mtd_otp_size(mtd, false); in mtd_otp_nvmem_add()
990 err = mtd_nvmem_fact_otp_reg_read(mtd, 0, otp, size); in mtd_otp_nvmem_add()
998 nvmem = mtd_otp_nvmem_register(mtd, "factory-otp", size, in mtd_otp_nvmem_add()
1004 mtd->otp_factory_nvmem = nvmem; in mtd_otp_nvmem_add()
1011 nvmem_unregister(mtd->otp_user_nvmem); in mtd_otp_nvmem_add()
1016 * mtd_device_parse_register - parse partitions and register an MTD device.
1018 * @mtd: the MTD device to register
1019 * @types: the list of MTD partition probes to try, see
1021 * @parser_data: MTD partition parser-specific data
1025 * MTD device is registered if no partition info is found
1027 * This function aggregates MTD partitions parsing (done by
1028 * 'parse_mtd_partitions()') and MTD device and partitions registering. It
1029 * basically follows the most common pattern found in many MTD drivers:
1033 * * Then It tries to probe partitions on MTD device @mtd using parsers
1038 * * If no partitions were found this function just registers the MTD device
1039 * @mtd and exits.
1043 int mtd_device_parse_register(struct mtd_info *mtd, const char * const *types, in mtd_device_parse_register() argument
1050 mtd_set_dev_defaults(mtd); in mtd_device_parse_register()
1052 ret = mtd_otp_nvmem_add(mtd); in mtd_device_parse_register()
1057 ret = add_mtd_device(mtd); in mtd_device_parse_register()
1063 ret = parse_mtd_partitions(mtd, types, parser_data); in mtd_device_parse_register()
1070 ret = add_mtd_partitions(mtd, parts, nr_parts); in mtd_device_parse_register()
1071 else if (!device_is_registered(&mtd->dev)) in mtd_device_parse_register()
1072 ret = add_mtd_device(mtd); in mtd_device_parse_register()
1087 WARN_ONCE(mtd->_reboot && mtd->reboot_notifier.notifier_call, in mtd_device_parse_register()
1088 "MTD already registered\n"); in mtd_device_parse_register()
1089 if (mtd->_reboot && !mtd->reboot_notifier.notifier_call) { in mtd_device_parse_register()
1090 mtd->reboot_notifier.notifier_call = mtd_reboot_notifier; in mtd_device_parse_register()
1091 register_reboot_notifier(&mtd->reboot_notifier); in mtd_device_parse_register()
1096 nvmem_unregister(mtd->otp_user_nvmem); in mtd_device_parse_register()
1097 nvmem_unregister(mtd->otp_factory_nvmem); in mtd_device_parse_register()
1100 if (ret && device_is_registered(&mtd->dev)) in mtd_device_parse_register()
1101 del_mtd_device(mtd); in mtd_device_parse_register()
1108 * mtd_device_unregister - unregister an existing MTD device.
1110 * @master: the MTD device to unregister. This will unregister both the master
1137 * register_mtd_user - register a 'user' of MTD devices.
1141 * or removal of MTD devices. Causes the 'add' callback to be immediately
1142 * invoked for each MTD device currently present in the system.
1146 struct mtd_info *mtd; in register_mtd_user() local
1154 mtd_for_each_device(mtd) in register_mtd_user()
1155 new->add(mtd); in register_mtd_user()
1162 * unregister_mtd_user - unregister a 'user' of MTD devices.
1166 * notified upon addition or removal of MTD devices. Causes the
1167 * 'remove' callback to be immediately invoked for each MTD device
1172 struct mtd_info *mtd; in unregister_mtd_user() local
1178 mtd_for_each_device(mtd) in unregister_mtd_user()
1179 old->remove(mtd); in unregister_mtd_user()
1188 * get_mtd_device - obtain a validated handle for an MTD device
1189 * @mtd: last known address of the required MTD device
1190 * @num: internal device number of the required MTD device
1198 struct mtd_info *get_mtd_device(struct mtd_info *mtd, int num) in get_mtd_device() argument
1207 if (other == mtd) { in get_mtd_device()
1208 ret = mtd; in get_mtd_device()
1214 if (mtd && mtd != ret) in get_mtd_device()
1233 int __get_mtd_device(struct mtd_info *mtd) in __get_mtd_device() argument
1235 struct mtd_info *master = mtd_get_master(mtd); in __get_mtd_device()
1239 err = master->_get_device(mtd); in __get_mtd_device()
1250 while (mtd) { in __get_mtd_device()
1251 if (mtd != master) in __get_mtd_device()
1252 kref_get(&mtd->refcnt); in __get_mtd_device()
1253 mtd = mtd->parent; in __get_mtd_device()
1264 * of_get_mtd_device_by_node - obtain an MTD device associated with a given node
1270 struct mtd_info *mtd = NULL; in of_get_mtd_device_by_node() local
1279 mtd = tmp; in of_get_mtd_device_by_node()
1280 err = __get_mtd_device(mtd); in of_get_mtd_device_by_node()
1287 return err ? ERR_PTR(err) : mtd; in of_get_mtd_device_by_node()
1292 * get_mtd_device_nm - obtain a validated handle for an MTD device by
1294 * @name: MTD device name to open
1296 * This function returns MTD device description structure in case of
1302 struct mtd_info *mtd = NULL, *other; in get_mtd_device_nm() local
1308 mtd = other; in get_mtd_device_nm()
1313 if (!mtd) in get_mtd_device_nm()
1316 err = __get_mtd_device(mtd); in get_mtd_device_nm()
1321 return mtd; in get_mtd_device_nm()
1329 void put_mtd_device(struct mtd_info *mtd) in put_mtd_device() argument
1332 __put_mtd_device(mtd); in put_mtd_device()
1338 void __put_mtd_device(struct mtd_info *mtd) in __put_mtd_device() argument
1340 struct mtd_info *master = mtd_get_master(mtd); in __put_mtd_device()
1342 while (mtd) { in __put_mtd_device()
1343 /* kref_put() can relese mtd, so keep a reference mtd->parent */ in __put_mtd_device()
1344 struct mtd_info *parent = mtd->parent; in __put_mtd_device()
1346 if (mtd != master) in __put_mtd_device()
1347 kref_put(&mtd->refcnt, mtd_device_release); in __put_mtd_device()
1348 mtd = parent; in __put_mtd_device()
1367 int mtd_erase(struct mtd_info *mtd, struct erase_info *instr) in mtd_erase() argument
1369 struct mtd_info *master = mtd_get_master(mtd); in mtd_erase()
1370 u64 mst_ofs = mtd_get_master_ofs(mtd, 0); in mtd_erase()
1377 if (!mtd->erasesize || !master->_erase) in mtd_erase()
1380 if (instr->addr >= mtd->size || instr->len > mtd->size - instr->addr) in mtd_erase()
1382 if (!(mtd->flags & MTD_WRITEABLE)) in mtd_erase()
1390 if (mtd->flags & MTD_SLC_ON_MLC_EMULATION) { in mtd_erase()
1391 adjinstr.addr = (loff_t)mtd_div_by_eb(instr->addr, mtd) * in mtd_erase()
1393 adjinstr.len = ((u64)mtd_div_by_eb(instr->addr + instr->len, mtd) * in mtd_erase()
1404 if (mtd->flags & MTD_SLC_ON_MLC_EMULATION) { in mtd_erase()
1407 instr->fail_addr *= mtd->erasesize; in mtd_erase()
1418 int mtd_point(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, in mtd_point() argument
1421 struct mtd_info *master = mtd_get_master(mtd); in mtd_point()
1429 if (from < 0 || from >= mtd->size || len > mtd->size - from) in mtd_point()
1434 from = mtd_get_master_ofs(mtd, from); in mtd_point()
1440 int mtd_unpoint(struct mtd_info *mtd, loff_t from, size_t len) in mtd_unpoint() argument
1442 struct mtd_info *master = mtd_get_master(mtd); in mtd_unpoint()
1446 if (from < 0 || from >= mtd->size || len > mtd->size - from) in mtd_unpoint()
1450 return master->_unpoint(master, mtd_get_master_ofs(mtd, from), len); in mtd_unpoint()
1459 unsigned long mtd_get_unmapped_area(struct mtd_info *mtd, unsigned long len, in mtd_get_unmapped_area() argument
1466 ret = mtd_point(mtd, offset, len, &retlen, &virt, NULL); in mtd_get_unmapped_area()
1470 mtd_unpoint(mtd, offset, retlen); in mtd_get_unmapped_area()
1477 static void mtd_update_ecc_stats(struct mtd_info *mtd, struct mtd_info *master, in mtd_update_ecc_stats() argument
1482 if (master == mtd) in mtd_update_ecc_stats()
1489 while (mtd->parent) { in mtd_update_ecc_stats()
1490 mtd->ecc_stats.failed += diff.failed; in mtd_update_ecc_stats()
1491 mtd->ecc_stats.corrected += diff.corrected; in mtd_update_ecc_stats()
1492 mtd = mtd->parent; in mtd_update_ecc_stats()
1496 int mtd_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, in mtd_read() argument
1505 ret = mtd_read_oob(mtd, from, &ops); in mtd_read()
1512 int mtd_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, in mtd_write() argument
1521 ret = mtd_write_oob(mtd, to, &ops); in mtd_write()
1535 int mtd_panic_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, in mtd_panic_write() argument
1538 struct mtd_info *master = mtd_get_master(mtd); in mtd_panic_write()
1543 if (to < 0 || to >= mtd->size || len > mtd->size - to) in mtd_panic_write()
1545 if (!(mtd->flags & MTD_WRITEABLE)) in mtd_panic_write()
1552 return master->_panic_write(master, mtd_get_master_ofs(mtd, to), len, in mtd_panic_write()
1557 static int mtd_check_oob_ops(struct mtd_info *mtd, loff_t offs, in mtd_check_oob_ops() argument
1571 if (offs < 0 || offs + ops->len > mtd->size) in mtd_check_oob_ops()
1577 if (ops->ooboffs >= mtd_oobavail(mtd, ops)) in mtd_check_oob_ops()
1580 maxooblen = ((size_t)(mtd_div_by_ws(mtd->size, mtd) - in mtd_check_oob_ops()
1581 mtd_div_by_ws(offs, mtd)) * in mtd_check_oob_ops()
1582 mtd_oobavail(mtd, ops)) - ops->ooboffs; in mtd_check_oob_ops()
1590 static int mtd_read_oob_std(struct mtd_info *mtd, loff_t from, in mtd_read_oob_std() argument
1593 struct mtd_info *master = mtd_get_master(mtd); in mtd_read_oob_std()
1596 from = mtd_get_master_ofs(mtd, from); in mtd_read_oob_std()
1606 static int mtd_write_oob_std(struct mtd_info *mtd, loff_t to, in mtd_write_oob_std() argument
1609 struct mtd_info *master = mtd_get_master(mtd); in mtd_write_oob_std()
1612 to = mtd_get_master_ofs(mtd, to); in mtd_write_oob_std()
1622 static int mtd_io_emulated_slc(struct mtd_info *mtd, loff_t start, bool read, in mtd_io_emulated_slc() argument
1625 struct mtd_info *master = mtd_get_master(mtd); in mtd_io_emulated_slc()
1635 ebofs = mtd_mod_by_eb(start, mtd); in mtd_io_emulated_slc()
1636 base = (loff_t)mtd_div_by_eb(start, mtd) * master->erasesize; in mtd_io_emulated_slc()
1638 info.pair = mtd_div_by_ws(ebofs, mtd); in mtd_io_emulated_slc()
1639 pageofs = mtd_mod_by_ws(ebofs, mtd); in mtd_io_emulated_slc()
1640 oobavail = mtd_oobavail(mtd, ops); in mtd_io_emulated_slc()
1651 pos = mtd_wunit_to_offset(mtd, base, wunit); in mtd_io_emulated_slc()
1654 if (adjops.len > mtd->writesize - pageofs) in mtd_io_emulated_slc()
1655 adjops.len = mtd->writesize - pageofs; in mtd_io_emulated_slc()
1662 ret = mtd_read_oob_std(mtd, pos + pageofs, &adjops); in mtd_io_emulated_slc()
1666 ret = mtd_write_oob_std(mtd, pos + pageofs, &adjops); in mtd_io_emulated_slc()
1685 int mtd_read_oob(struct mtd_info *mtd, loff_t from, struct mtd_oob_ops *ops) in mtd_read_oob() argument
1687 struct mtd_info *master = mtd_get_master(mtd); in mtd_read_oob()
1693 ret_code = mtd_check_oob_ops(mtd, from, ops); in mtd_read_oob()
1699 /* Check the validity of a potential fallback on mtd->_read */ in mtd_read_oob()
1706 if (mtd->flags & MTD_SLC_ON_MLC_EMULATION) in mtd_read_oob()
1707 ret_code = mtd_io_emulated_slc(mtd, from, true, ops); in mtd_read_oob()
1709 ret_code = mtd_read_oob_std(mtd, from, ops); in mtd_read_oob()
1711 mtd_update_ecc_stats(mtd, master, &old_stats); in mtd_read_oob()
1714 * In cases where ops->datbuf != NULL, mtd->_read_oob() has semantics in mtd_read_oob()
1715 * similar to mtd->_read(), returning a non-negative integer in mtd_read_oob()
1716 * representing max bitflips. In other cases, mtd->_read_oob() may in mtd_read_oob()
1721 if (mtd->ecc_strength == 0) in mtd_read_oob()
1725 return ret_code >= mtd->bitflip_threshold ? -EUCLEAN : 0; in mtd_read_oob()
1729 int mtd_write_oob(struct mtd_info *mtd, loff_t to, in mtd_write_oob() argument
1732 struct mtd_info *master = mtd_get_master(mtd); in mtd_write_oob()
1737 if (!(mtd->flags & MTD_WRITEABLE)) in mtd_write_oob()
1740 ret = mtd_check_oob_ops(mtd, to, ops); in mtd_write_oob()
1746 /* Check the validity of a potential fallback on mtd->_write */ in mtd_write_oob()
1750 if (mtd->flags & MTD_SLC_ON_MLC_EMULATION) in mtd_write_oob()
1751 return mtd_io_emulated_slc(mtd, to, false, ops); in mtd_write_oob()
1753 return mtd_write_oob_std(mtd, to, ops); in mtd_write_oob()
1759 * @mtd: MTD device structure
1769 * mtd_ooblayout_ecc(mtd, section++, oobecc) until it returns -ERANGE.
1773 int mtd_ooblayout_ecc(struct mtd_info *mtd, int section, in mtd_ooblayout_ecc() argument
1776 struct mtd_info *master = mtd_get_master(mtd); in mtd_ooblayout_ecc()
1793 * @mtd: MTD device structure
1803 * mtd_ooblayout_free(mtd, section++, oobfree) until it returns -ERANGE.
1807 int mtd_ooblayout_free(struct mtd_info *mtd, int section, in mtd_ooblayout_free() argument
1810 struct mtd_info *master = mtd_get_master(mtd); in mtd_ooblayout_free()
1826 * @mtd: mtd info structure
1837 * mtd_ooblayout_find_region(mtd, 3, §ion, &oobregion, mtd_ooblayout_ecc);
1841 static int mtd_ooblayout_find_region(struct mtd_info *mtd, int byte, in mtd_ooblayout_find_region() argument
1852 ret = iter(mtd, section, oobregion); in mtd_ooblayout_find_region()
1877 * @mtd: mtd info structure
1887 int mtd_ooblayout_find_eccregion(struct mtd_info *mtd, int eccbyte, in mtd_ooblayout_find_eccregion() argument
1891 return mtd_ooblayout_find_region(mtd, eccbyte, section, oobregion, in mtd_ooblayout_find_eccregion()
1898 * @mtd: mtd info structure
1910 static int mtd_ooblayout_get_bytes(struct mtd_info *mtd, u8 *buf, in mtd_ooblayout_get_bytes() argument
1919 ret = mtd_ooblayout_find_region(mtd, start, §ion, in mtd_ooblayout_get_bytes()
1933 ret = iter(mtd, ++section, &oobregion); in mtd_ooblayout_get_bytes()
1941 * @mtd: mtd info structure
1953 static int mtd_ooblayout_set_bytes(struct mtd_info *mtd, const u8 *buf, in mtd_ooblayout_set_bytes() argument
1962 ret = mtd_ooblayout_find_region(mtd, start, §ion, in mtd_ooblayout_set_bytes()
1976 ret = iter(mtd, ++section, &oobregion); in mtd_ooblayout_set_bytes()
1984 * @mtd: mtd info structure
1991 static int mtd_ooblayout_count_bytes(struct mtd_info *mtd, in mtd_ooblayout_count_bytes() argument
2000 ret = iter(mtd, section++, &oobregion); in mtd_ooblayout_count_bytes()
2015 * @mtd: mtd info structure
2025 int mtd_ooblayout_get_eccbytes(struct mtd_info *mtd, u8 *eccbuf, in mtd_ooblayout_get_eccbytes() argument
2028 return mtd_ooblayout_get_bytes(mtd, eccbuf, oobbuf, start, nbytes, in mtd_ooblayout_get_eccbytes()
2035 * @mtd: mtd info structure
2045 int mtd_ooblayout_set_eccbytes(struct mtd_info *mtd, const u8 *eccbuf, in mtd_ooblayout_set_eccbytes() argument
2048 return mtd_ooblayout_set_bytes(mtd, eccbuf, oobbuf, start, nbytes, in mtd_ooblayout_set_eccbytes()
2055 * @mtd: mtd info structure
2065 int mtd_ooblayout_get_databytes(struct mtd_info *mtd, u8 *databuf, in mtd_ooblayout_get_databytes() argument
2068 return mtd_ooblayout_get_bytes(mtd, databuf, oobbuf, start, nbytes, in mtd_ooblayout_get_databytes()
2075 * @mtd: mtd info structure
2085 int mtd_ooblayout_set_databytes(struct mtd_info *mtd, const u8 *databuf, in mtd_ooblayout_set_databytes() argument
2088 return mtd_ooblayout_set_bytes(mtd, databuf, oobbuf, start, nbytes, in mtd_ooblayout_set_databytes()
2095 * @mtd: mtd info structure
2101 int mtd_ooblayout_count_freebytes(struct mtd_info *mtd) in mtd_ooblayout_count_freebytes() argument
2103 return mtd_ooblayout_count_bytes(mtd, mtd_ooblayout_free); in mtd_ooblayout_count_freebytes()
2109 * @mtd: mtd info structure
2115 int mtd_ooblayout_count_eccbytes(struct mtd_info *mtd) in mtd_ooblayout_count_eccbytes() argument
2117 return mtd_ooblayout_count_bytes(mtd, mtd_ooblayout_ecc); in mtd_ooblayout_count_eccbytes()
2126 int mtd_get_fact_prot_info(struct mtd_info *mtd, size_t len, size_t *retlen, in mtd_get_fact_prot_info() argument
2129 struct mtd_info *master = mtd_get_master(mtd); in mtd_get_fact_prot_info()
2139 int mtd_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, size_t len, in mtd_read_fact_prot_reg() argument
2142 struct mtd_info *master = mtd_get_master(mtd); in mtd_read_fact_prot_reg()
2153 int mtd_get_user_prot_info(struct mtd_info *mtd, size_t len, size_t *retlen, in mtd_get_user_prot_info() argument
2156 struct mtd_info *master = mtd_get_master(mtd); in mtd_get_user_prot_info()
2166 int mtd_read_user_prot_reg(struct mtd_info *mtd, loff_t from, size_t len, in mtd_read_user_prot_reg() argument
2169 struct mtd_info *master = mtd_get_master(mtd); in mtd_read_user_prot_reg()
2180 int mtd_write_user_prot_reg(struct mtd_info *mtd, loff_t to, size_t len, in mtd_write_user_prot_reg() argument
2183 struct mtd_info *master = mtd_get_master(mtd); in mtd_write_user_prot_reg()
2203 int mtd_lock_user_prot_reg(struct mtd_info *mtd, loff_t from, size_t len) in mtd_lock_user_prot_reg() argument
2205 struct mtd_info *master = mtd_get_master(mtd); in mtd_lock_user_prot_reg()
2215 int mtd_erase_user_prot_reg(struct mtd_info *mtd, loff_t from, size_t len) in mtd_erase_user_prot_reg() argument
2217 struct mtd_info *master = mtd_get_master(mtd); in mtd_erase_user_prot_reg()
2228 int mtd_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) in mtd_lock() argument
2230 struct mtd_info *master = mtd_get_master(mtd); in mtd_lock()
2234 if (ofs < 0 || ofs >= mtd->size || len > mtd->size - ofs) in mtd_lock()
2239 if (mtd->flags & MTD_SLC_ON_MLC_EMULATION) { in mtd_lock()
2240 ofs = (loff_t)mtd_div_by_eb(ofs, mtd) * master->erasesize; in mtd_lock()
2241 len = (u64)mtd_div_by_eb(len, mtd) * master->erasesize; in mtd_lock()
2244 return master->_lock(master, mtd_get_master_ofs(mtd, ofs), len); in mtd_lock()
2248 int mtd_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) in mtd_unlock() argument
2250 struct mtd_info *master = mtd_get_master(mtd); in mtd_unlock()
2254 if (ofs < 0 || ofs >= mtd->size || len > mtd->size - ofs) in mtd_unlock()
2259 if (mtd->flags & MTD_SLC_ON_MLC_EMULATION) { in mtd_unlock()
2260 ofs = (loff_t)mtd_div_by_eb(ofs, mtd) * master->erasesize; in mtd_unlock()
2261 len = (u64)mtd_div_by_eb(len, mtd) * master->erasesize; in mtd_unlock()
2264 return master->_unlock(master, mtd_get_master_ofs(mtd, ofs), len); in mtd_unlock()
2268 int mtd_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len) in mtd_is_locked() argument
2270 struct mtd_info *master = mtd_get_master(mtd); in mtd_is_locked()
2274 if (ofs < 0 || ofs >= mtd->size || len > mtd->size - ofs) in mtd_is_locked()
2279 if (mtd->flags & MTD_SLC_ON_MLC_EMULATION) { in mtd_is_locked()
2280 ofs = (loff_t)mtd_div_by_eb(ofs, mtd) * master->erasesize; in mtd_is_locked()
2281 len = (u64)mtd_div_by_eb(len, mtd) * master->erasesize; in mtd_is_locked()
2284 return master->_is_locked(master, mtd_get_master_ofs(mtd, ofs), len); in mtd_is_locked()
2288 int mtd_block_isreserved(struct mtd_info *mtd, loff_t ofs) in mtd_block_isreserved() argument
2290 struct mtd_info *master = mtd_get_master(mtd); in mtd_block_isreserved()
2292 if (ofs < 0 || ofs >= mtd->size) in mtd_block_isreserved()
2297 if (mtd->flags & MTD_SLC_ON_MLC_EMULATION) in mtd_block_isreserved()
2298 ofs = (loff_t)mtd_div_by_eb(ofs, mtd) * master->erasesize; in mtd_block_isreserved()
2300 return master->_block_isreserved(master, mtd_get_master_ofs(mtd, ofs)); in mtd_block_isreserved()
2304 int mtd_block_isbad(struct mtd_info *mtd, loff_t ofs) in mtd_block_isbad() argument
2306 struct mtd_info *master = mtd_get_master(mtd); in mtd_block_isbad()
2308 if (ofs < 0 || ofs >= mtd->size) in mtd_block_isbad()
2313 if (mtd->flags & MTD_SLC_ON_MLC_EMULATION) in mtd_block_isbad()
2314 ofs = (loff_t)mtd_div_by_eb(ofs, mtd) * master->erasesize; in mtd_block_isbad()
2316 return master->_block_isbad(master, mtd_get_master_ofs(mtd, ofs)); in mtd_block_isbad()
2320 int mtd_block_markbad(struct mtd_info *mtd, loff_t ofs) in mtd_block_markbad() argument
2322 struct mtd_info *master = mtd_get_master(mtd); in mtd_block_markbad()
2327 if (ofs < 0 || ofs >= mtd->size) in mtd_block_markbad()
2329 if (!(mtd->flags & MTD_WRITEABLE)) in mtd_block_markbad()
2332 if (mtd->flags & MTD_SLC_ON_MLC_EMULATION) in mtd_block_markbad()
2333 ofs = (loff_t)mtd_div_by_eb(ofs, mtd) * master->erasesize; in mtd_block_markbad()
2335 ret = master->_block_markbad(master, mtd_get_master_ofs(mtd, ofs)); in mtd_block_markbad()
2339 while (mtd->parent) { in mtd_block_markbad()
2340 mtd->ecc_stats.badblocks++; in mtd_block_markbad()
2341 mtd = mtd->parent; in mtd_block_markbad()
2350 * @mtd: mtd device description object pointer
2353 * @to: the MTD device offset to write to
2354 * @retlen: on exit contains the count of bytes written to the MTD device.
2359 static int default_mtd_writev(struct mtd_info *mtd, const struct kvec *vecs, in default_mtd_writev() argument
2369 ret = mtd_write(mtd, to, vecs[i].iov_len, &thislen, in default_mtd_writev()
2381 * mtd_writev - the vector-based MTD write method
2382 * @mtd: mtd device description object pointer
2385 * @to: the MTD device offset to write to
2386 * @retlen: on exit contains the count of bytes written to the MTD device.
2391 int mtd_writev(struct mtd_info *mtd, const struct kvec *vecs, in mtd_writev() argument
2394 struct mtd_info *master = mtd_get_master(mtd); in mtd_writev()
2397 if (!(mtd->flags & MTD_WRITEABLE)) in mtd_writev()
2401 return default_mtd_writev(mtd, vecs, count, to, retlen); in mtd_writev()
2404 mtd_get_master_ofs(mtd, to), retlen); in mtd_writev()
2410 * @mtd: mtd device description object pointer
2423 * the MTD device's min. I/O unit, i.e. the "mtd->writesize" value.
2432 void *mtd_kmalloc_up_to(const struct mtd_info *mtd, size_t *size) in mtd_kmalloc_up_to() argument
2435 size_t min_alloc = max_t(size_t, mtd->writesize, PAGE_SIZE); in mtd_kmalloc_up_to()
2446 *size = ALIGN(*size, mtd->writesize); in mtd_kmalloc_up_to()
2460 /* Support for /proc/mtd */
2464 struct mtd_info *mtd; in mtd_proc_show() local
2468 mtd_for_each_device(mtd) { in mtd_proc_show()
2469 seq_printf(m, "mtd%d: %8.8llx %8.8x \"%s\"\n", in mtd_proc_show()
2470 mtd->index, (unsigned long long)mtd->size, in mtd_proc_show()
2471 mtd->erasesize, mtd->name); in mtd_proc_show()
2513 mtd_bdi = mtd_bdi_init("mtd"); in init_mtd()
2519 proc_mtd = proc_create_single("mtd", 0, NULL, mtd_proc_show); in init_mtd()
2525 dfs_dir_mtd = debugfs_create_dir("mtd", NULL); in init_mtd()
2533 remove_proc_entry("mtd", NULL); in init_mtd()
2539 pr_err("Error registering mtd class or bdi: %d\n", ret); in init_mtd()
2548 remove_proc_entry("mtd", NULL); in cleanup_mtd()
2560 MODULE_DESCRIPTION("Core MTD registration and access routines");