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mtd: rawnand: fsl_ifc: fixup SRAM init for newer ctrl versions

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Newer versions of the IFC controller use a different method of initializing the
internal SRAM: Instead of reading from flash, a bit in the NAND configuration
register has to be set in order to trigger the self-initializing process.

Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
This commit is contained in:
Kurt Kanzenbach 2018-08-13 09:18:46 +02:00 committed by Miquel Raynal
parent 434655af6a
commit ff8648f29f
2 changed files with 28 additions and 7 deletions
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33
drivers/mtd/nand/raw/fsl_ifc_nand.c
View File

@ -30,6 +30,7 @@
#include <linux/mtd/partitions.h>
#include <linux/mtd/nand_ecc.h>
#include <linux/fsl_ifc.h>
#include <linux/iopoll.h>
#define ERR_BYTE 0xFF /* Value returned for read
bytes when read failed */
@ -769,6 +770,27 @@ static int fsl_ifc_sram_init(struct fsl_ifc_mtd *priv)
uint32_t csor = 0, csor_8k = 0, csor_ext = 0;
uint32_t cs = priv->bank;
if (ctrl->version < FSL_IFC_VERSION_1_1_0)
return 0;
if (ctrl->version > FSL_IFC_VERSION_1_1_0) {
u32 ncfgr, status;
int ret;
/* Trigger auto initialization */
ncfgr = ifc_in32(&ifc_runtime->ifc_nand.ncfgr);
ifc_out32(ncfgr | IFC_NAND_NCFGR_SRAM_INIT_EN, &ifc_runtime->ifc_nand.ncfgr);
/* Wait until done */
ret = readx_poll_timeout(ifc_in32, &ifc_runtime->ifc_nand.ncfgr,
status, !(status & IFC_NAND_NCFGR_SRAM_INIT_EN),
10, IFC_TIMEOUT_MSECS * 1000);
if (ret)
dev_err(priv->dev, "Failed to initialize SRAM!\n");
return ret;
}
/* Save CSOR and CSOR_ext */
csor = ifc_in32(&ifc_global->csor_cs[cs].csor);
csor_ext = ifc_in32(&ifc_global->csor_cs[cs].csor_ext);
@ -825,6 +847,7 @@ static int fsl_ifc_chip_init(struct fsl_ifc_mtd *priv)
struct nand_chip *chip = &priv->chip;
struct mtd_info *mtd = nand_to_mtd(&priv->chip);
u32 csor;
int ret;
/* Fill in fsl_ifc_mtd structure */
mtd->dev.parent = priv->dev;
@ -918,13 +941,9 @@ static int fsl_ifc_chip_init(struct fsl_ifc_mtd *priv)
chip->ecc.algo = NAND_ECC_HAMMING;
}
if (ctrl->version >= FSL_IFC_VERSION_1_1_0) {
int ret;
ret = fsl_ifc_sram_init(priv);
if (ret)
return ret;
}
ret = fsl_ifc_sram_init(priv);
if (ret)
return ret;
/*
* As IFC version 2.0.0 has 16KB of internal SRAM as compared to older

2
include/linux/fsl_ifc.h
View File

@ -274,6 +274,8 @@
*/
/* Auto Boot Mode */
#define IFC_NAND_NCFGR_BOOT 0x80000000
/* SRAM Initialization */
#define IFC_NAND_NCFGR_SRAM_INIT_EN 0x20000000
/* Addressing Mode-ROW0+n/COL0 */
#define IFC_NAND_NCFGR_ADDR_MODE_RC0 0x00000000
/* Addressing Mode-ROW0+n/COL0+n */