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authorJamie Iles <jamie@jamieiles.com>2011-05-06 15:28:57 +0100
committerDavid Woodhouse <David.Woodhouse@intel.com>2011-05-25 02:02:12 +0100
commitc89eeda810f0ec4f0eee0206ebb79e476df9f83e (patch)
treee01415f166a82c05b1bc4e339dda8b47689716c5
parent9589bf5bed2936a159fc96c96339f15a512fdfa9 (diff)
downloadop-kernel-dev-c89eeda810f0ec4f0eee0206ebb79e476df9f83e.zip
op-kernel-dev-c89eeda810f0ec4f0eee0206ebb79e476df9f83e.tar.gz
mtd: denali: detect the number of banks
Not all configurations of the Denali controller support 4 banks. The controller can support between 1 and 16 banks. Detect this from the design features register. Signed-off-by: Jamie Iles <jamie@jamieiles.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
-rw-r--r--drivers/mtd/nand/denali.c28
-rw-r--r--drivers/mtd/nand/denali.h2
2 files changed, 21 insertions, 9 deletions
diff --git a/drivers/mtd/nand/denali.c b/drivers/mtd/nand/denali.c
index 5568640..8c5dc89 100644
--- a/drivers/mtd/nand/denali.c
+++ b/drivers/mtd/nand/denali.c
@@ -178,11 +178,11 @@ static uint16_t denali_nand_reset(struct denali_nand_info *denali)
dev_dbg(denali->dev, "%s, Line %d, Function: %s\n",
__FILE__, __LINE__, __func__);
- for (i = 0 ; i < LLD_MAX_FLASH_BANKS; i++)
+ for (i = 0 ; i < denali->max_banks; i++)
iowrite32(INTR_STATUS__RST_COMP | INTR_STATUS__TIME_OUT,
denali->flash_reg + INTR_STATUS(i));
- for (i = 0 ; i < LLD_MAX_FLASH_BANKS; i++) {
+ for (i = 0 ; i < denali->max_banks; i++) {
iowrite32(1 << i, denali->flash_reg + DEVICE_RESET);
while (!(ioread32(denali->flash_reg +
INTR_STATUS(i)) &
@@ -194,7 +194,7 @@ static uint16_t denali_nand_reset(struct denali_nand_info *denali)
"NAND Reset operation timed out on bank %d\n", i);
}
- for (i = 0; i < LLD_MAX_FLASH_BANKS; i++)
+ for (i = 0; i < denali->max_banks; i++)
iowrite32(INTR_STATUS__RST_COMP | INTR_STATUS__TIME_OUT,
denali->flash_reg + INTR_STATUS(i));
@@ -405,11 +405,11 @@ static void get_hynix_nand_para(struct denali_nand_info *denali,
*/
static void find_valid_banks(struct denali_nand_info *denali)
{
- uint32_t id[LLD_MAX_FLASH_BANKS];
+ uint32_t id[denali->max_banks];
int i;
denali->total_used_banks = 1;
- for (i = 0; i < LLD_MAX_FLASH_BANKS; i++) {
+ for (i = 0; i < denali->max_banks; i++) {
index_addr(denali, (uint32_t)(MODE_11 | (i << 24) | 0), 0x90);
index_addr(denali, (uint32_t)(MODE_11 | (i << 24) | 1), 0);
index_addr_read_data(denali,
@@ -445,6 +445,17 @@ static void find_valid_banks(struct denali_nand_info *denali)
"denali->total_used_banks: %d\n", denali->total_used_banks);
}
+/*
+ * Use the configuration feature register to determine the maximum number of
+ * banks that the hardware supports.
+ */
+static void detect_max_banks(struct denali_nand_info *denali)
+{
+ uint32_t features = ioread32(denali->flash_reg + FEATURES);
+
+ denali->max_banks = 2 << (features & FEATURES__N_BANKS);
+}
+
static void detect_partition_feature(struct denali_nand_info *denali)
{
/* For MRST platform, denali->fwblks represent the
@@ -562,7 +573,7 @@ static void denali_irq_init(struct denali_nand_info *denali)
int_mask = DENALI_IRQ_ALL;
/* Clear all status bits */
- for (i = 0; i < LLD_MAX_FLASH_BANKS; ++i)
+ for (i = 0; i < denali->max_banks; ++i)
iowrite32(0xFFFF, denali->flash_reg + INTR_STATUS(i));
denali_irq_enable(denali, int_mask);
@@ -579,7 +590,7 @@ static void denali_irq_enable(struct denali_nand_info *denali,
{
int i;
- for (i = 0; i < LLD_MAX_FLASH_BANKS; ++i)
+ for (i = 0; i < denali->max_banks; ++i)
iowrite32(int_mask, denali->flash_reg + INTR_EN(i));
}
@@ -1345,6 +1356,7 @@ static void denali_hw_init(struct denali_nand_info *denali)
/* Should set value for these registers when init */
iowrite32(0, denali->flash_reg + TWO_ROW_ADDR_CYCLES);
iowrite32(1, denali->flash_reg + ECC_ENABLE);
+ detect_max_banks(denali);
denali_nand_timing_set(denali);
denali_irq_init(denali);
}
@@ -1522,7 +1534,7 @@ static int denali_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
/* scan for NAND devices attached to the controller
* this is the first stage in a two step process to register
* with the nand subsystem */
- if (nand_scan_ident(&denali->mtd, LLD_MAX_FLASH_BANKS, NULL)) {
+ if (nand_scan_ident(&denali->mtd, denali->max_banks, NULL)) {
ret = -ENXIO;
goto failed_req_irq;
}
diff --git a/drivers/mtd/nand/denali.h b/drivers/mtd/nand/denali.h
index 638668c..fabb9d5 100644
--- a/drivers/mtd/nand/denali.h
+++ b/drivers/mtd/nand/denali.h
@@ -454,7 +454,6 @@
#define READ_WRITE_ENABLE_HIGH_COUNT 22
#define ECC_SECTOR_SIZE 512
-#define LLD_MAX_FLASH_BANKS 4
#define DENALI_BUF_SIZE (NAND_MAX_PAGESIZE + NAND_MAX_OOBSIZE)
@@ -494,6 +493,7 @@ struct denali_nand_info {
uint32_t totalblks;
uint32_t blksperchip;
uint32_t bbtskipbytes;
+ uint32_t max_banks;
};
#endif /*_LLD_NAND_*/
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