diff options
Diffstat (limited to 'qemu/roms/u-boot/drivers/mtd/mtdcore.c')
| -rw-r--r-- | qemu/roms/u-boot/drivers/mtd/mtdcore.c | 390 |
1 files changed, 0 insertions, 390 deletions
diff --git a/qemu/roms/u-boot/drivers/mtd/mtdcore.c b/qemu/roms/u-boot/drivers/mtd/mtdcore.c deleted file mode 100644 index 0a38fbef1..000000000 --- a/qemu/roms/u-boot/drivers/mtd/mtdcore.c +++ /dev/null @@ -1,390 +0,0 @@ -/* - * Core registration and callback routines for MTD - * drivers and users. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include <linux/mtd/mtd.h> -#include <linux/compat.h> -#include <ubi_uboot.h> - -struct mtd_info *mtd_table[MAX_MTD_DEVICES]; - -int add_mtd_device(struct mtd_info *mtd) -{ - int i; - - BUG_ON(mtd->writesize == 0); - - for (i = 0; i < MAX_MTD_DEVICES; i++) - if (!mtd_table[i]) { - mtd_table[i] = mtd; - mtd->index = i; - mtd->usecount = 0; - - /* default value if not set by driver */ - if (mtd->bitflip_threshold == 0) - mtd->bitflip_threshold = mtd->ecc_strength; - - - /* No need to get a refcount on the module containing - the notifier, since we hold the mtd_table_mutex */ - - /* We _know_ we aren't being removed, because - our caller is still holding us here. So none - of this try_ nonsense, and no bitching about it - either. :) */ - return 0; - } - - return 1; -} - -/** - * del_mtd_device - unregister an MTD device - * @mtd: pointer to MTD device info structure - * - * Remove a device from the list of MTD devices present in the system, - * and notify each currently active MTD 'user' of its departure. - * Returns zero on success or 1 on failure, which currently will happen - * if the requested device does not appear to be present in the list. - */ -int del_mtd_device(struct mtd_info *mtd) -{ - int ret; - - if (mtd_table[mtd->index] != mtd) { - ret = -ENODEV; - } else if (mtd->usecount) { - printk(KERN_NOTICE "Removing MTD device #%d (%s)" - " with use count %d\n", - mtd->index, mtd->name, mtd->usecount); - ret = -EBUSY; - } else { - /* No need to get a refcount on the module containing - * the notifier, since we hold the mtd_table_mutex */ - mtd_table[mtd->index] = NULL; - - ret = 0; - } - - return ret; -} - -/** - * get_mtd_device - obtain a validated handle for an MTD device - * @mtd: last known address of the required MTD device - * @num: internal device number of the required MTD device - * - * Given a number and NULL address, return the num'th entry in the device - * table, if any. Given an address and num == -1, search the device table - * for a device with that address and return if it's still present. Given - * both, return the num'th driver only if its address matches. Return - * error code if not. - */ -struct mtd_info *get_mtd_device(struct mtd_info *mtd, int num) -{ - struct mtd_info *ret = NULL; - int i, err = -ENODEV; - - if (num == -1) { - for (i = 0; i < MAX_MTD_DEVICES; i++) - if (mtd_table[i] == mtd) - ret = mtd_table[i]; - } else if (num < MAX_MTD_DEVICES) { - ret = mtd_table[num]; - if (mtd && mtd != ret) - ret = NULL; - } - - if (!ret) - goto out_unlock; - - ret->usecount++; - return ret; - -out_unlock: - return ERR_PTR(err); -} - -/** - * get_mtd_device_nm - obtain a validated handle for an MTD device by - * device name - * @name: MTD device name to open - * - * This function returns MTD device description structure in case of - * success and an error code in case of failure. - */ -struct mtd_info *get_mtd_device_nm(const char *name) -{ - int i, err = -ENODEV; - struct mtd_info *mtd = NULL; - - for (i = 0; i < MAX_MTD_DEVICES; i++) { - if (mtd_table[i] && !strcmp(name, mtd_table[i]->name)) { - mtd = mtd_table[i]; - break; - } - } - - if (!mtd) - goto out_unlock; - - mtd->usecount++; - return mtd; - -out_unlock: - return ERR_PTR(err); -} - -void put_mtd_device(struct mtd_info *mtd) -{ - int c; - - c = --mtd->usecount; - BUG_ON(c < 0); -} - -#if defined(CONFIG_CMD_MTDPARTS_SPREAD) -/** - * mtd_get_len_incl_bad - * - * Check if length including bad blocks fits into device. - * - * @param mtd an MTD device - * @param offset offset in flash - * @param length image length - * @return image length including bad blocks in *len_incl_bad and whether or not - * the length returned was truncated in *truncated - */ -void mtd_get_len_incl_bad(struct mtd_info *mtd, uint64_t offset, - const uint64_t length, uint64_t *len_incl_bad, - int *truncated) -{ - *truncated = 0; - *len_incl_bad = 0; - - if (!mtd->block_isbad) { - *len_incl_bad = length; - return; - } - - uint64_t len_excl_bad = 0; - uint64_t block_len; - - while (len_excl_bad < length) { - if (offset >= mtd->size) { - *truncated = 1; - return; - } - - block_len = mtd->erasesize - (offset & (mtd->erasesize - 1)); - - if (!mtd->block_isbad(mtd, offset & ~(mtd->erasesize - 1))) - len_excl_bad += block_len; - - *len_incl_bad += block_len; - offset += block_len; - } -} -#endif /* defined(CONFIG_CMD_MTDPARTS_SPREAD) */ - - /* - * Erase is an asynchronous operation. Device drivers are supposed - * to call instr->callback() whenever the operation completes, even - * if it completes with a failure. - * Callers are supposed to pass a callback function and wait for it - * to be called before writing to the block. - */ -int mtd_erase(struct mtd_info *mtd, struct erase_info *instr) -{ - if (instr->addr > mtd->size || instr->len > mtd->size - instr->addr) - return -EINVAL; - if (!(mtd->flags & MTD_WRITEABLE)) - return -EROFS; - instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN; - if (!instr->len) { - instr->state = MTD_ERASE_DONE; - mtd_erase_callback(instr); - return 0; - } - return mtd->_erase(mtd, instr); -} - -int mtd_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, - u_char *buf) -{ - int ret_code; - if (from < 0 || from > mtd->size || len > mtd->size - from) - return -EINVAL; - if (!len) - return 0; - - /* - * In the absence of an error, drivers return a non-negative integer - * representing the maximum number of bitflips that were corrected on - * any one ecc region (if applicable; zero otherwise). - */ - ret_code = mtd->_read(mtd, from, len, retlen, buf); - if (unlikely(ret_code < 0)) - return ret_code; - if (mtd->ecc_strength == 0) - return 0; /* device lacks ecc */ - return ret_code >= mtd->bitflip_threshold ? -EUCLEAN : 0; -} - -int mtd_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, - const u_char *buf) -{ - *retlen = 0; - if (to < 0 || to > mtd->size || len > mtd->size - to) - return -EINVAL; - if (!mtd->_write || !(mtd->flags & MTD_WRITEABLE)) - return -EROFS; - if (!len) - return 0; - return mtd->_write(mtd, to, len, retlen, buf); -} - -/* - * In blackbox flight recorder like scenarios we want to make successful writes - * in interrupt context. panic_write() is only intended to be called when its - * known the kernel is about to panic and we need the write to succeed. Since - * the kernel is not going to be running for much longer, this function can - * break locks and delay to ensure the write succeeds (but not sleep). - */ -int mtd_panic_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, - const u_char *buf) -{ - *retlen = 0; - if (!mtd->_panic_write) - return -EOPNOTSUPP; - if (to < 0 || to > mtd->size || len > mtd->size - to) - return -EINVAL; - if (!(mtd->flags & MTD_WRITEABLE)) - return -EROFS; - if (!len) - return 0; - return mtd->_panic_write(mtd, to, len, retlen, buf); -} - -int mtd_read_oob(struct mtd_info *mtd, loff_t from, struct mtd_oob_ops *ops) -{ - ops->retlen = ops->oobretlen = 0; - if (!mtd->_read_oob) - return -EOPNOTSUPP; - return mtd->_read_oob(mtd, from, ops); -} - -/* - * Method to access the protection register area, present in some flash - * devices. The user data is one time programmable but the factory data is read - * only. - */ -int mtd_get_fact_prot_info(struct mtd_info *mtd, struct otp_info *buf, - size_t len) -{ - if (!mtd->_get_fact_prot_info) - return -EOPNOTSUPP; - if (!len) - return 0; - return mtd->_get_fact_prot_info(mtd, buf, len); -} - -int mtd_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, size_t len, - size_t *retlen, u_char *buf) -{ - *retlen = 0; - if (!mtd->_read_fact_prot_reg) - return -EOPNOTSUPP; - if (!len) - return 0; - return mtd->_read_fact_prot_reg(mtd, from, len, retlen, buf); -} - -int mtd_get_user_prot_info(struct mtd_info *mtd, struct otp_info *buf, - size_t len) -{ - if (!mtd->_get_user_prot_info) - return -EOPNOTSUPP; - if (!len) - return 0; - return mtd->_get_user_prot_info(mtd, buf, len); -} - -int mtd_read_user_prot_reg(struct mtd_info *mtd, loff_t from, size_t len, - size_t *retlen, u_char *buf) -{ - *retlen = 0; - if (!mtd->_read_user_prot_reg) - return -EOPNOTSUPP; - if (!len) - return 0; - return mtd->_read_user_prot_reg(mtd, from, len, retlen, buf); -} - -int mtd_write_user_prot_reg(struct mtd_info *mtd, loff_t to, size_t len, - size_t *retlen, u_char *buf) -{ - *retlen = 0; - if (!mtd->_write_user_prot_reg) - return -EOPNOTSUPP; - if (!len) - return 0; - return mtd->_write_user_prot_reg(mtd, to, len, retlen, buf); -} - -int mtd_lock_user_prot_reg(struct mtd_info *mtd, loff_t from, size_t len) -{ - if (!mtd->_lock_user_prot_reg) - return -EOPNOTSUPP; - if (!len) - return 0; - return mtd->_lock_user_prot_reg(mtd, from, len); -} - -/* Chip-supported device locking */ -int mtd_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) -{ - if (!mtd->_lock) - return -EOPNOTSUPP; - if (ofs < 0 || ofs > mtd->size || len > mtd->size - ofs) - return -EINVAL; - if (!len) - return 0; - return mtd->_lock(mtd, ofs, len); -} - -int mtd_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) -{ - if (!mtd->_unlock) - return -EOPNOTSUPP; - if (ofs < 0 || ofs > mtd->size || len > mtd->size - ofs) - return -EINVAL; - if (!len) - return 0; - return mtd->_unlock(mtd, ofs, len); -} - -int mtd_block_isbad(struct mtd_info *mtd, loff_t ofs) -{ - if (!mtd->_block_isbad) - return 0; - if (ofs < 0 || ofs > mtd->size) - return -EINVAL; - return mtd->_block_isbad(mtd, ofs); -} - -int mtd_block_markbad(struct mtd_info *mtd, loff_t ofs) -{ - if (!mtd->_block_markbad) - return -EOPNOTSUPP; - if (ofs < 0 || ofs > mtd->size) - return -EINVAL; - if (!(mtd->flags & MTD_WRITEABLE)) - return -EROFS; - return mtd->_block_markbad(mtd, ofs); -} |