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authorPrabhakar Kushwaha <prabhakar@freescale.com>2014-06-12 12:14:00 +0530
committerYork Sun <yorksun@freescale.com>2014-07-22 16:25:54 -0700
commit04818bbdc34cb02b2590af8e5f77118ed8a8d755 (patch)
treef8e51caef6aac425789ff8e18b49003c462f5b3c /drivers
parent3bab3d8324874604501ff9154e68732fb986057a (diff)
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driver/nand: Update SRAM initialize logic for IFC.
IFC controller v1.1.0 requires internal SRAM initialize by reading NAND flash. Higher controller versions have provided "SRAM init" bit in NCFGR register space. update SRAM initialize logic to reflect the same. Also print error message in case of Page read error. Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com> Reviewed-by: York Sun <yorksun@freescale.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mtd/nand/fsl_ifc_nand.c35
1 files changed, 31 insertions, 4 deletions
diff --git a/drivers/mtd/nand/fsl_ifc_nand.c b/drivers/mtd/nand/fsl_ifc_nand.c
index 27f5177..280e14e 100644
--- a/drivers/mtd/nand/fsl_ifc_nand.c
+++ b/drivers/mtd/nand/fsl_ifc_nand.c
@@ -806,12 +806,30 @@ static void fsl_ifc_select_chip(struct mtd_info *mtd, int chip)
{
}
-static void fsl_ifc_sram_init(void)
+static int fsl_ifc_sram_init(uint32_t ver)
{
struct fsl_ifc *ifc = ifc_ctrl->regs;
uint32_t cs = 0, csor = 0, csor_8k = 0, csor_ext = 0;
+ uint32_t ncfgr = 0;
long long end_tick;
+ if (ver > FSL_IFC_V1_1_0) {
+ ncfgr = ifc_in32(&ifc->ifc_nand.ncfgr);
+ ifc_out32(&ifc->ifc_nand.ncfgr, ncfgr | IFC_NAND_SRAM_INIT_EN);
+
+ /* wait for SRAM_INIT bit to be clear or timeout */
+ end_tick = usec2ticks(IFC_TIMEOUT_MSECS * 1000) + get_ticks();
+ while (end_tick > get_ticks()) {
+ ifc_ctrl->status =
+ ifc_in32(&ifc->ifc_nand.nand_evter_stat);
+
+ if (!(ifc_ctrl->status & IFC_NAND_SRAM_INIT_EN))
+ return 0;
+ }
+ printf("fsl-ifc: Failed to Initialise SRAM\n");
+ return 1;
+ }
+
cs = ifc_ctrl->cs_nand >> IFC_NAND_CSEL_SHIFT;
/* Save CSOR and CSOR_ext */
@@ -854,11 +872,18 @@ static void fsl_ifc_sram_init(void)
break;
}
+ if (ifc_ctrl->status != IFC_NAND_EVTER_STAT_OPC) {
+ printf("fsl-ifc: Failed to Initialise SRAM\n");
+ return 1;
+ }
+
ifc_out32(&ifc->ifc_nand.nand_evter_stat, ifc_ctrl->status);
/* Restore CSOR and CSOR_ext */
ifc_out32(&ifc_ctrl->regs->csor_cs[cs].csor, csor);
ifc_out32(&ifc_ctrl->regs->csor_cs[cs].csor_ext, csor_ext);
+
+ return 0;
}
static int fsl_ifc_chip_init(int devnum, u8 *addr)
@@ -868,7 +893,7 @@ static int fsl_ifc_chip_init(int devnum, u8 *addr)
struct fsl_ifc_mtd *priv;
struct nand_ecclayout *layout;
uint32_t cspr = 0, csor = 0, ver = 0;
- int ret;
+ int ret = 0;
if (!ifc_ctrl) {
fsl_ifc_ctrl_init();
@@ -1010,8 +1035,10 @@ static int fsl_ifc_chip_init(int devnum, u8 *addr)
}
ver = ifc_in32(&ifc_ctrl->regs->ifc_rev);
- if (ver == FSL_IFC_V1_1_0)
- fsl_ifc_sram_init();
+ if (ver >= FSL_IFC_V1_1_0)
+ ret = fsl_ifc_sram_init(ver);
+ if (ret)
+ return ret;
ret = nand_scan_ident(mtd, 1, NULL);
if (ret)