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authorBoris Brezillon <boris.brezillon@bootlin.com>2019-08-24 09:22:03 +0300
committerTudor Ambarus <tudor.ambarus@microchip.com>2019-08-28 12:40:28 +0300
commitdff972458acb05ab919b6950da99f8172ab14836 (patch)
tree8f438fb73f7690e6fdb9c9bfa3eea37c11d2d082 /drivers/mtd
parent64c160f32235f725a5378c66fb3583c720357ab9 (diff)
mtd: spi-nor: Rework the SPI NOR lock/unlock logic
Add the SNOR_F_HAS_LOCK flag and set it when SPI_NOR_HAS_LOCK is set in the flash_info entry or when it's a Micron or ST flash. Move the locking hooks in a separate struct so that we have just one field to update when we change the locking implementation. Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com> [tudor.ambarus@microchip.com: use ->default_init() hook, introduce spi_nor_late_init_params(), set ops in nor->params] Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com> Reviewed-by: Vignesh Raghavendra <vigneshr@ti.com>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/spi-nor/spi-nor.c50
1 files changed, 37 insertions, 13 deletions
diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index b903fe9ac60e..f630ec9bad71 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -1598,6 +1598,12 @@ static int stm_is_locked(struct spi_nor *nor, loff_t ofs, uint64_t len)
return stm_is_locked_sr(nor, ofs, len, status);
}
+static const struct spi_nor_locking_ops stm_locking_ops = {
+ .lock = stm_lock,
+ .unlock = stm_unlock,
+ .is_locked = stm_is_locked,
+};
+
static int spi_nor_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
{
struct spi_nor *nor = mtd_to_spi_nor(mtd);
@@ -1607,7 +1613,7 @@ static int spi_nor_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
if (ret)
return ret;
- ret = nor->flash_lock(nor, ofs, len);
+ ret = nor->params.locking_ops->lock(nor, ofs, len);
spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_UNLOCK);
return ret;
@@ -1622,7 +1628,7 @@ static int spi_nor_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
if (ret)
return ret;
- ret = nor->flash_unlock(nor, ofs, len);
+ ret = nor->params.locking_ops->unlock(nor, ofs, len);
spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_LOCK);
return ret;
@@ -1637,7 +1643,7 @@ static int spi_nor_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)
if (ret)
return ret;
- ret = nor->flash_is_locked(nor, ofs, len);
+ ret = nor->params.locking_ops->is_locked(nor, ofs, len);
spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_LOCK);
return ret;
@@ -4148,6 +4154,7 @@ static void macronix_set_default_init(struct spi_nor *nor)
static void st_micron_set_default_init(struct spi_nor *nor)
{
+ nor->flags |= SNOR_F_HAS_LOCK;
nor->params.quad_enable = NULL;
nor->params.set_4byte = st_micron_set_4byte;
}
@@ -4292,6 +4299,23 @@ static void spi_nor_info_init_params(struct spi_nor *nor)
}
/**
+ * spi_nor_late_init_params() - Late initialization of default flash parameters.
+ * @nor: pointer to a 'struct spi_nor'
+ *
+ * Used to set default flash parameters and settings when the ->default_init()
+ * hook or the SFDP parser let voids.
+ */
+static void spi_nor_late_init_params(struct spi_nor *nor)
+{
+ /*
+ * NOR protection support. When locking_ops are not provided, we pick
+ * the default ones.
+ */
+ if (nor->flags & SNOR_F_HAS_LOCK && !nor->params.locking_ops)
+ nor->params.locking_ops = &stm_locking_ops;
+}
+
+/**
* spi_nor_init_params() - Initialize the flash's parameters and settings.
* @nor: pointer to a 'struct spi-nor'.
*
@@ -4316,6 +4340,10 @@ static void spi_nor_info_init_params(struct spi_nor *nor)
* Please note that there is a ->post_bfpt() fixup hook that can overwrite
* the flash parameters and settings immediately after parsing the Basic
* Flash Parameter Table.
+ *
+ * 4/ Late default flash parameters initialization, used when the
+ * ->default_init() hook or the SFDP parser do not set specific params.
+ * spi_nor_late_init_params()
*/
static void spi_nor_init_params(struct spi_nor *nor)
{
@@ -4326,6 +4354,8 @@ static void spi_nor_init_params(struct spi_nor *nor)
if ((nor->info->flags & (SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ)) &&
!(nor->info->flags & SPI_NOR_SKIP_SFDP))
spi_nor_sfdp_init_params(nor);
+
+ spi_nor_late_init_params(nor);
}
static int spi_nor_select_read(struct spi_nor *nor,
@@ -4707,6 +4737,9 @@ int spi_nor_scan(struct spi_nor *nor, const char *name,
if (info->flags & SPI_S3AN)
nor->flags |= SNOR_F_READY_XSR_RDY;
+ if (info->flags & SPI_NOR_HAS_LOCK)
+ nor->flags |= SNOR_F_HAS_LOCK;
+
/*
* Atmel, SST, Intel/Numonyx, and others serial NOR tend to power up
* with the software protection bits set.
@@ -4731,16 +4764,7 @@ int spi_nor_scan(struct spi_nor *nor, const char *name,
mtd->_read = spi_nor_read;
mtd->_resume = spi_nor_resume;
- /* NOR protection support for STmicro/Micron chips and similar */
- if (JEDEC_MFR(info) == SNOR_MFR_ST ||
- JEDEC_MFR(info) == SNOR_MFR_MICRON ||
- info->flags & SPI_NOR_HAS_LOCK) {
- nor->flash_lock = stm_lock;
- nor->flash_unlock = stm_unlock;
- nor->flash_is_locked = stm_is_locked;
- }
-
- if (nor->flash_lock && nor->flash_unlock && nor->flash_is_locked) {
+ if (nor->params.locking_ops) {
mtd->_lock = spi_nor_lock;
mtd->_unlock = spi_nor_unlock;
mtd->_is_locked = spi_nor_is_locked;