Lines Matching full:nor

3  * SPI NOR Software Write Protection logic.
9 #include <linux/mtd/spi-nor.h>
13 static u8 spi_nor_get_sr_bp_mask(struct spi_nor *nor) in spi_nor_get_sr_bp_mask() argument
17 if (nor->flags & SNOR_F_HAS_SR_BP3_BIT6) in spi_nor_get_sr_bp_mask()
20 if (nor->flags & SNOR_F_HAS_4BIT_BP) in spi_nor_get_sr_bp_mask()
26 static u8 spi_nor_get_sr_tb_mask(struct spi_nor *nor) in spi_nor_get_sr_tb_mask() argument
28 if (nor->flags & SNOR_F_HAS_SR_TB_BIT6) in spi_nor_get_sr_tb_mask()
34 static u64 spi_nor_get_min_prot_length_sr(struct spi_nor *nor) in spi_nor_get_min_prot_length_sr() argument
37 u8 mask = spi_nor_get_sr_bp_mask(nor); in spi_nor_get_min_prot_length_sr()
41 bp_slots_needed = ilog2(nor->info->n_sectors); in spi_nor_get_min_prot_length_sr()
44 return nor->info->sector_size << in spi_nor_get_min_prot_length_sr()
47 return nor->info->sector_size; in spi_nor_get_min_prot_length_sr()
50 static void spi_nor_get_locked_range_sr(struct spi_nor *nor, u8 sr, loff_t *ofs, in spi_nor_get_locked_range_sr() argument
53 struct mtd_info *mtd = &nor->mtd; in spi_nor_get_locked_range_sr()
55 u8 mask = spi_nor_get_sr_bp_mask(nor); in spi_nor_get_locked_range_sr()
56 u8 tb_mask = spi_nor_get_sr_tb_mask(nor); in spi_nor_get_locked_range_sr()
59 if (nor->flags & SNOR_F_HAS_SR_BP3_BIT6 && val & SR_BP3_BIT6) in spi_nor_get_locked_range_sr()
71 min_prot_len = spi_nor_get_min_prot_length_sr(nor); in spi_nor_get_locked_range_sr()
77 if (nor->flags & SNOR_F_HAS_SR_TB && sr & tb_mask) in spi_nor_get_locked_range_sr()
87 static bool spi_nor_check_lock_status_sr(struct spi_nor *nor, loff_t ofs, in spi_nor_check_lock_status_sr() argument
96 spi_nor_get_locked_range_sr(nor, sr, &lock_offs, &lock_len); in spi_nor_check_lock_status_sr()
109 static bool spi_nor_is_locked_sr(struct spi_nor *nor, loff_t ofs, uint64_t len, in spi_nor_is_locked_sr() argument
112 return spi_nor_check_lock_status_sr(nor, ofs, len, sr, true); in spi_nor_is_locked_sr()
115 static bool spi_nor_is_unlocked_sr(struct spi_nor *nor, loff_t ofs, in spi_nor_is_unlocked_sr() argument
118 return spi_nor_check_lock_status_sr(nor, ofs, len, sr, false); in spi_nor_is_unlocked_sr()
154 static int spi_nor_sr_lock(struct spi_nor *nor, loff_t ofs, uint64_t len) in spi_nor_sr_lock() argument
156 struct mtd_info *mtd = &nor->mtd; in spi_nor_sr_lock()
159 u8 mask = spi_nor_get_sr_bp_mask(nor); in spi_nor_sr_lock()
160 u8 tb_mask = spi_nor_get_sr_tb_mask(nor); in spi_nor_sr_lock()
163 bool can_be_top = true, can_be_bottom = nor->flags & SNOR_F_HAS_SR_TB; in spi_nor_sr_lock()
166 ret = spi_nor_read_sr(nor, nor->bouncebuf); in spi_nor_sr_lock()
170 status_old = nor->bouncebuf[0]; in spi_nor_sr_lock()
173 if (spi_nor_is_locked_sr(nor, ofs, len, status_old)) in spi_nor_sr_lock()
177 if (!spi_nor_is_locked_sr(nor, 0, ofs, status_old)) in spi_nor_sr_lock()
181 if (!spi_nor_is_locked_sr(nor, ofs + len, mtd->size - (ofs + len), in spi_nor_sr_lock()
200 min_prot_len = spi_nor_get_min_prot_length_sr(nor); in spi_nor_sr_lock()
204 if (nor->flags & SNOR_F_HAS_SR_BP3_BIT6 && val & SR_BP3) in spi_nor_sr_lock()
231 return spi_nor_write_sr_and_check(nor, status_new); in spi_nor_sr_lock()
239 static int spi_nor_sr_unlock(struct spi_nor *nor, loff_t ofs, uint64_t len) in spi_nor_sr_unlock() argument
241 struct mtd_info *mtd = &nor->mtd; in spi_nor_sr_unlock()
244 u8 mask = spi_nor_get_sr_bp_mask(nor); in spi_nor_sr_unlock()
245 u8 tb_mask = spi_nor_get_sr_tb_mask(nor); in spi_nor_sr_unlock()
248 bool can_be_top = true, can_be_bottom = nor->flags & SNOR_F_HAS_SR_TB; in spi_nor_sr_unlock()
251 ret = spi_nor_read_sr(nor, nor->bouncebuf); in spi_nor_sr_unlock()
255 status_old = nor->bouncebuf[0]; in spi_nor_sr_unlock()
258 if (spi_nor_is_unlocked_sr(nor, ofs, len, status_old)) in spi_nor_sr_unlock()
262 if (!spi_nor_is_unlocked_sr(nor, 0, ofs, status_old)) in spi_nor_sr_unlock()
266 if (!spi_nor_is_unlocked_sr(nor, ofs + len, mtd->size - (ofs + len), in spi_nor_sr_unlock()
285 min_prot_len = spi_nor_get_min_prot_length_sr(nor); in spi_nor_sr_unlock()
289 if (nor->flags & SNOR_F_HAS_SR_BP3_BIT6 && val & SR_BP3) in spi_nor_sr_unlock()
314 return spi_nor_write_sr_and_check(nor, status_new); in spi_nor_sr_unlock()
324 static int spi_nor_sr_is_locked(struct spi_nor *nor, loff_t ofs, uint64_t len) in spi_nor_sr_is_locked() argument
328 ret = spi_nor_read_sr(nor, nor->bouncebuf); in spi_nor_sr_is_locked()
332 return spi_nor_is_locked_sr(nor, ofs, len, nor->bouncebuf[0]); in spi_nor_sr_is_locked()
341 void spi_nor_init_default_locking_ops(struct spi_nor *nor) in spi_nor_init_default_locking_ops() argument
343 nor->params->locking_ops = &spi_nor_sr_locking_ops; in spi_nor_init_default_locking_ops()
348 struct spi_nor *nor = mtd_to_spi_nor(mtd); in spi_nor_lock() local
351 ret = spi_nor_lock_and_prep(nor); in spi_nor_lock()
355 ret = nor->params->locking_ops->lock(nor, ofs, len); in spi_nor_lock()
357 spi_nor_unlock_and_unprep(nor); in spi_nor_lock()
363 struct spi_nor *nor = mtd_to_spi_nor(mtd); in spi_nor_unlock() local
366 ret = spi_nor_lock_and_prep(nor); in spi_nor_unlock()
370 ret = nor->params->locking_ops->unlock(nor, ofs, len); in spi_nor_unlock()
372 spi_nor_unlock_and_unprep(nor); in spi_nor_unlock()
378 struct spi_nor *nor = mtd_to_spi_nor(mtd); in spi_nor_is_locked() local
381 ret = spi_nor_lock_and_prep(nor); in spi_nor_is_locked()
385 ret = nor->params->locking_ops->is_locked(nor, ofs, len); in spi_nor_is_locked()
387 spi_nor_unlock_and_unprep(nor); in spi_nor_is_locked()
393 * @nor: pointer to a 'struct spi_nor'.
395 * Some SPI NOR flashes are write protected by default after a power-on reset
403 void spi_nor_try_unlock_all(struct spi_nor *nor) in spi_nor_try_unlock_all() argument
407 if (!(nor->flags & SNOR_F_HAS_LOCK)) in spi_nor_try_unlock_all()
410 dev_dbg(nor->dev, "Unprotecting entire flash array\n"); in spi_nor_try_unlock_all()
412 ret = spi_nor_unlock(&nor->mtd, 0, nor->params->size); in spi_nor_try_unlock_all()
414 dev_dbg(nor->dev, "Failed to unlock the entire flash memory array\n"); in spi_nor_try_unlock_all()
417 void spi_nor_set_mtd_locking_ops(struct spi_nor *nor) in spi_nor_set_mtd_locking_ops() argument
419 struct mtd_info *mtd = &nor->mtd; in spi_nor_set_mtd_locking_ops()
421 if (!nor->params->locking_ops) in spi_nor_set_mtd_locking_ops()