mtd: nand: Add manufacturer specific initialization/detection steps
Upstream linux commit abbe26d144ec22.
A lot of NANDs are implementing generic features in a non-generic way,
or are providing advanced auto-detection logic where the NAND ID bytes
meaning changes with the NAND generation.
Providing this vendor specific initialization step will allow us to get
rid of full-id entries in the nand_ids table or all the vendor specific
cases added over the time in the generic NAND ID decoding logic.
Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index 220804c..0900e6d 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -4287,6 +4287,39 @@
}
/*
+ * Manufacturer detection. Only used when the NAND is not ONFI or JEDEC
+ * compliant and does not have a full-id or legacy-id entry in the nand_ids
+ * table.
+ */
+static void nand_manufacturer_detect(struct mtd_info *mtd, struct nand_chip *chip)
+{
+ /*
+ * Try manufacturer detection if available and use
+ * nand_decode_ext_id() otherwise.
+ */
+ if (chip->manufacturer.desc && chip->manufacturer.desc->ops &&
+ chip->manufacturer.desc->ops->detect)
+ chip->manufacturer.desc->ops->detect(chip);
+ else
+ nand_decode_ext_id(mtd, chip);
+}
+
+/*
+ * Manufacturer initialization. This function is called for all NANDs including
+ * ONFI and JEDEC compliant ones.
+ * Manufacturer drivers should put all their specific initialization code in
+ * their ->init() hook.
+ */
+static int nand_manufacturer_init(struct nand_chip *chip)
+{
+ if (!chip->manufacturer.desc || !chip->manufacturer.desc->ops ||
+ !chip->manufacturer.desc->ops->init)
+ return 0;
+
+ return chip->manufacturer.desc->ops->init(chip);
+}
+
+/*
* Old devices have chip data hardcoded in the device ID table. nand_decode_id
* decodes a matching ID table entry and assigns the MTD size parameters for
* the chip.
@@ -4383,6 +4416,26 @@
return false;
}
+/**
+ * nand_get_manufacturer_desc - Get manufacturer information from the
+ * manufacturer ID
+ * @id: manufacturer ID
+ *
+ * Returns a nand_manufacturer_desc object if the manufacturer is defined
+ * in the NAND manufacturers database, NULL otherwise.
+ */
+static const struct nand_manufacturers *nand_get_manufacturer_desc(u8 id)
+{
+ int i;
+
+ for (i = 0; nand_manuf_ids[i].id != 0x0; i++) {
+ if (nand_manuf_ids[i].id == id)
+ return &nand_manuf_ids[i];
+ }
+
+ return NULL;
+}
+
/*
* Get the flash and manufacturer id and lookup if the type is supported.
*/
@@ -4391,8 +4444,8 @@
int *maf_id, int *dev_id,
struct nand_flash_dev *type)
{
+ const struct nand_manufacturers *manufacturer_desc;
int busw, ret;
- int maf_idx;
u8 *id_data = chip->id.data;
/*
@@ -4433,6 +4486,12 @@
return ERR_PTR(-ENODEV);
}
+ chip->id.len = nand_id_len(id_data, ARRAY_SIZE(chip->id.data));
+
+ /* Try to identify manufacturer */
+ manufacturer_desc = nand_get_manufacturer_desc(*maf_id);
+ chip->manufacturer.desc = manufacturer_desc;
+
if (!type)
type = nand_flash_ids;
@@ -4451,8 +4510,6 @@
*/
chip->options &= ~NAND_BUSWIDTH_16;
- chip->id.len = nand_id_len(id_data, ARRAY_SIZE(chip->id.data));
-
for (; type->name != NULL; type++) {
if (is_full_id_nand(type)) {
if (find_full_id_nand(mtd, chip, type))
@@ -4482,8 +4539,7 @@
chip->chipsize = (uint64_t)type->chipsize << 20;
if (!type->pagesize) {
- /* Decode parameters from extended ID */
- nand_decode_ext_id(mtd, chip);
+ nand_manufacturer_detect(mtd, chip);
} else {
nand_decode_id(mtd, chip, type);
}
@@ -4499,12 +4555,6 @@
chip->options &= ~NAND_SAMSUNG_LP_OPTIONS;
ident_done:
- /* Try to identify manufacturer */
- for (maf_idx = 0; nand_manuf_ids[maf_idx].id != 0x0; maf_idx++) {
- if (nand_manuf_ids[maf_idx].id == *maf_id)
- break;
- }
-
if (chip->options & NAND_BUSWIDTH_AUTO) {
WARN_ON(chip->options & NAND_BUSWIDTH_16);
chip->options |= busw;
@@ -4516,7 +4566,7 @@
*/
pr_info("device found, Manufacturer ID: 0x%02x, Chip ID: 0x%02x\n",
*maf_id, *dev_id);
- pr_info("%s %s\n", nand_manuf_ids[maf_idx].name, mtd->name);
+ pr_info("%s %s\n", manufacturer_desc->name, mtd->name);
pr_warn("bus width %d instead %d bit\n",
(chip->options & NAND_BUSWIDTH_16) ? 16 : 8,
busw ? 16 : 8);
@@ -4549,28 +4599,30 @@
if (mtd->writesize > 512 && chip->cmdfunc == nand_command)
chip->cmdfunc = nand_command_lp;
+ ret = nand_manufacturer_init(chip);
+ if (ret)
+ return ERR_PTR(ret);
+
pr_info("device found, Manufacturer ID: 0x%02x, Chip ID: 0x%02x\n",
*maf_id, *dev_id);
#ifdef CONFIG_SYS_NAND_ONFI_DETECTION
if (chip->onfi_version)
- pr_info("%s %s\n", nand_manuf_ids[maf_idx].name,
- chip->onfi_params.model);
+ pr_info("%s %s\n", manufacturer_desc->name,
+ chip->onfi_params.model);
else if (chip->jedec_version)
- pr_info("%s %s\n", nand_manuf_ids[maf_idx].name,
- chip->jedec_params.model);
+ pr_info("%s %s\n", manufacturer_desc->name,
+ chip->jedec_params.model);
else
- pr_info("%s %s\n", nand_manuf_ids[maf_idx].name,
- type->name);
+ pr_info("%s %s\n", manufacturer_desc->name, type->name);
#else
if (chip->jedec_version)
- pr_info("%s %s\n", nand_manuf_ids[maf_idx].name,
- chip->jedec_params.model);
+ pr_info("%s %s\n", manufacturer_desc->name,
+ chip->jedec_params.model);
else
- pr_info("%s %s\n", nand_manuf_ids[maf_idx].name,
- type->name);
+ pr_info("%s %s\n", manufacturer_desc->name, type->name);
- pr_info("%s %s\n", nand_manuf_ids[maf_idx].name,
+ pr_info("%s %s\n", manufacturer_desc->name,
type->name);
#endif