@@ -2249,49 +2249,6 @@ static int spi_nor_default_setup(struct spi_nor *nor,
return 0;
}
-static int spi_nor_set_addr_nbytes(struct spi_nor *nor)
-{
- if (nor->params->addr_nbytes) {
- nor->addr_nbytes = nor->params->addr_nbytes;
- } else if (nor->read_proto == SNOR_PROTO_8_8_8_DTR) {
- /*
- * In 8D-8D-8D mode, one byte takes half a cycle to transfer. So
- * in this protocol an odd address width cannot be used because
- * then the address phase would only span a cycle and a half.
- * Half a cycle would be left over. We would then have to start
- * the dummy phase in the middle of a cycle and so too the data
- * phase, and we will end the transaction with half a cycle left
- * over.
- *
- * Force all 8D-8D-8D flashes to use an address width of 4 to
- * avoid this situation.
- */
- nor->addr_nbytes = 4;
- } else if (nor->info->addr_nbytes) {
- nor->addr_nbytes = nor->info->addr_nbytes;
- } else {
- nor->addr_nbytes = 3;
- }
-
- if (nor->addr_nbytes == 3 && nor->params->size > 0x1000000) {
- /* enable 4-byte addressing if the device exceeds 16MiB */
- nor->addr_nbytes = 4;
- }
-
- if (nor->addr_nbytes > SPI_NOR_MAX_ADDR_NBYTES) {
- dev_dbg(nor->dev, "address width is too large: %u\n",
- nor->addr_nbytes);
- return -EINVAL;
- }
-
- /* Set 4byte opcodes when possible. */
- if (nor->addr_nbytes == 4 && nor->flags & SNOR_F_4B_OPCODES &&
- !(nor->flags & SNOR_F_HAS_4BAIT))
- spi_nor_set_4byte_opcodes(nor);
-
- return 0;
-}
-
static int spi_nor_setup(struct spi_nor *nor,
const struct spi_nor_hwcaps *hwcaps)
{
@@ -2301,10 +2258,7 @@ static int spi_nor_setup(struct spi_nor *nor,
ret = nor->params->setup(nor, hwcaps);
else
ret = spi_nor_default_setup(nor, hwcaps);
- if (ret)
- return ret;
-
- return spi_nor_set_addr_nbytes(nor);
+ return ret;
}
/**
@@ -2686,6 +2640,74 @@ static int spi_nor_quad_enable(struct spi_nor *nor)
return nor->params->quad_enable(nor);
}
+static int spi_nor_set_addr_nbytes(struct spi_nor *nor)
+{
+ if (nor->params->addr_nbytes) {
+ nor->addr_nbytes = nor->params->addr_nbytes;
+ } else if (nor->read_proto == SNOR_PROTO_8_8_8_DTR) {
+ /*
+ * In 8D-8D-8D mode, one byte takes half a cycle to transfer. So
+ * in this protocol an odd address width cannot be used because
+ * then the address phase would only span a cycle and a half.
+ * Half a cycle would be left over. We would then have to start
+ * the dummy phase in the middle of a cycle and so too the data
+ * phase, and we will end the transaction with half a cycle left
+ * over.
+ *
+ * Force all 8D-8D-8D flashes to use an address width of 4 to
+ * avoid this situation.
+ */
+ nor->addr_nbytes = 4;
+ } else if (nor->info->addr_nbytes) {
+ nor->addr_nbytes = nor->info->addr_nbytes;
+ } else {
+ nor->addr_nbytes = 3;
+ }
+
+ if (nor->addr_nbytes == 3 && nor->params->size > 0x1000000) {
+ /* enable 4-byte addressing if the device exceeds 16MiB */
+ nor->addr_nbytes = 4;
+ }
+
+ if (nor->addr_nbytes > SPI_NOR_MAX_ADDR_NBYTES) {
+ dev_dbg(nor->dev, "address width is too large: %u\n",
+ nor->addr_nbytes);
+ return -EINVAL;
+ }
+
+ /* Set 4byte opcodes when possible. */
+ if (nor->addr_nbytes == 4 && nor->flags & SNOR_F_4B_OPCODES &&
+ !(nor->flags & SNOR_F_HAS_4BAIT))
+ spi_nor_set_4byte_opcodes(nor);
+
+ return 0;
+}
+
+static int spi_nor_set_addr_mode(struct spi_nor *nor)
+{
+ int ret;
+
+ ret = spi_nor_set_addr_nbytes(nor);
+ if (ret)
+ return ret;
+
+ if (nor->addr_nbytes == 4 && nor->read_proto != SNOR_PROTO_8_8_8_DTR &&
+ !(nor->flags & SNOR_F_4B_OPCODES)) {
+ /*
+ * If the RESET# pin isn't hooked up properly, or the system
+ * otherwise doesn't perform a reset command in the boot
+ * sequence, it's impossible to 100% protect against unexpected
+ * reboots (e.g., crashes). Warn the user (or hopefully, system
+ * designer) that this is bad.
+ */
+ WARN_ONCE(nor->flags & SNOR_F_BROKEN_RESET,
+ "enabling reset hack; may not recover from unexpected reboots\n");
+ return nor->params->set_4byte_addr_mode(nor, true);
+ }
+
+ return 0;
+}
+
static int spi_nor_init(struct spi_nor *nor)
{
int err;
@@ -2717,22 +2739,7 @@ static int spi_nor_init(struct spi_nor *nor)
nor->flags & SNOR_F_SWP_IS_VOLATILE))
spi_nor_try_unlock_all(nor);
- if (nor->addr_nbytes == 4 &&
- nor->read_proto != SNOR_PROTO_8_8_8_DTR &&
- !(nor->flags & SNOR_F_4B_OPCODES)) {
- /*
- * If the RESET# pin isn't hooked up properly, or the system
- * otherwise doesn't perform a reset command in the boot
- * sequence, it's impossible to 100% protect against unexpected
- * reboots (e.g., crashes). Warn the user (or hopefully, system
- * designer) that this is bad.
- */
- WARN_ONCE(nor->flags & SNOR_F_BROKEN_RESET,
- "enabling reset hack; may not recover from unexpected reboots\n");
- return nor->params->set_4byte_addr_mode(nor, true);
- }
-
- return 0;
+ return spi_nor_set_addr_mode(nor);
}
/**
@@ -2988,7 +2995,6 @@ int spi_nor_scan(struct spi_nor *nor, const char *name,
* - select op codes for (Fast) Read, Page Program and Sector Erase.
* - set the number of dummy cycles (mode cycles + wait states).
* - set the SPI protocols for register and memory accesses.
- * - set the address width.
*/
ret = spi_nor_setup(nor, hwcaps);
if (ret)