Add board/cpu specific NAND chip select function to 440 NDFC
Based on idea and implementation from Jeff Mann
Patch by Stefan Roese, 20 Oct 2006
diff --git a/cpu/ppc4xx/ndfc.c b/cpu/ppc4xx/ndfc.c
index 183ab5e..2c44111 100644
--- a/cpu/ppc4xx/ndfc.c
+++ b/cpu/ppc4xx/ndfc.c
@@ -66,7 +66,7 @@
static void ndfc_write_byte(struct mtd_info *mtdinfo, u_char byte)
{
struct nand_chip *this = mtdinfo->priv;
- ulong base = (ulong) this->IO_ADDR_W;
+ ulong base = (ulong) this->IO_ADDR_W & 0xfffffffc;
if (hwctl & 0x1)
out8(base + NDFC_CMD, byte);
@@ -79,7 +79,7 @@
static u_char ndfc_read_byte(struct mtd_info *mtdinfo)
{
struct nand_chip *this = mtdinfo->priv;
- ulong base = (ulong) this->IO_ADDR_W;
+ ulong base = (ulong) this->IO_ADDR_W & 0xfffffffc;
return (in8(base + NDFC_DATA));
}
@@ -87,7 +87,7 @@
static int ndfc_dev_ready(struct mtd_info *mtdinfo)
{
struct nand_chip *this = mtdinfo->priv;
- ulong base = (ulong) this->IO_ADDR_W;
+ ulong base = (ulong) this->IO_ADDR_W & 0xfffffffc;
while (!(in32(base + NDFC_STAT) & NDFC_STAT_IS_READY))
;
@@ -111,30 +111,30 @@
static void ndfc_read_buf(struct mtd_info *mtdinfo, uint8_t *buf, int len)
{
struct nand_chip *this = mtdinfo->priv;
- ulong base = (ulong) this->IO_ADDR_W;
+ ulong base = (ulong) this->IO_ADDR_W & 0xfffffffc;
uint32_t *p = (uint32_t *) buf;
- for(;len > 0; len -= 4)
+ for (;len > 0; len -= 4)
*p++ = in32(base + NDFC_DATA);
}
static void ndfc_write_buf(struct mtd_info *mtdinfo, const uint8_t *buf, int len)
{
struct nand_chip *this = mtdinfo->priv;
- ulong base = (ulong) this->IO_ADDR_W;
+ ulong base = (ulong) this->IO_ADDR_W & 0xfffffffc;
uint32_t *p = (uint32_t *) buf;
- for(; len > 0; len -= 4)
+ for (; len > 0; len -= 4)
out32(base + NDFC_DATA, *p++);
}
static int ndfc_verify_buf(struct mtd_info *mtdinfo, const uint8_t *buf, int len)
{
struct nand_chip *this = mtdinfo->priv;
- ulong base = (ulong) this->IO_ADDR_W;
+ ulong base = (ulong) this->IO_ADDR_W & 0xfffffffc;
uint32_t *p = (uint32_t *) buf;
- for(; len > 0; len -= 4)
+ for (; len > 0; len -= 4)
if (*p++ != in32(base + NDFC_DATA))
return -1;
@@ -142,8 +142,20 @@
}
#endif /* #ifndef CONFIG_NAND_SPL */
+void board_nand_select_device(struct nand_chip *nand, int chip)
+{
+ ulong base = (ulong)nand->IO_ADDR_W & 0xfffffffc;
+
+ /* Set NandFlash Core Configuration Register */
+ /* 1col x 2 rows */
+ out32(base + NDFC_CCR, 0x00000000 | (chip << 24));
+}
+
void board_nand_init(struct nand_chip *nand)
{
+ int chip = (ulong)nand->IO_ADDR_W & 0x00000003;
+ ulong base = (ulong)nand->IO_ADDR_W & 0xfffffffc;
+
nand->eccmode = NAND_ECC_SOFT;
nand->hwcontrol = ndfc_hwcontrol;
@@ -166,10 +178,11 @@
mtebc(pb0ap, CFG_EBC_PB0AP);
#endif
- /* Set NandFlash Core Configuration Register */
- /* Chip select 3, 1col x 2 rows */
- out32(CFG_NAND_BASE + NDFC_CCR, 0x00000000 | (CFG_NAND_CS << 24));
- out32(CFG_NAND_BASE + NDFC_BCFG0 + (CFG_NAND_CS << 2), 0x80002222);
+ /*
+ * Select required NAND chip in NDFC
+ */
+ board_nand_select_device(nand, chip);
+ out32(base + NDFC_BCFG0 + (chip << 2), 0x80002222);
}
#endif