diff options
Diffstat (limited to 'drivers/mtd/nand/fsl_ifc_nand.c')
| -rw-r--r-- | drivers/mtd/nand/fsl_ifc_nand.c | 33 |
1 files changed, 22 insertions, 11 deletions
diff --git a/drivers/mtd/nand/fsl_ifc_nand.c b/drivers/mtd/nand/fsl_ifc_nand.c index 79fa88b22f..975b0d4613 100644 --- a/drivers/mtd/nand/fsl_ifc_nand.c +++ b/drivers/mtd/nand/fsl_ifc_nand.c @@ -47,7 +47,7 @@ struct fsl_ifc_ctrl { /* device info */ struct fsl_ifc regs; - uint8_t __iomem *addr; /* Address of assigned IFC buffer */ + void __iomem *addr; /* Address of assigned IFC buffer */ unsigned int cs_nand; /* On which chipsel NAND is connected */ unsigned int page; /* Last page written to / read from */ unsigned int read_bytes; /* Number of bytes read during command */ @@ -577,8 +577,15 @@ static void fsl_ifc_cmdfunc(struct mtd_info *mtd, unsigned int command, fsl_ifc_run_command(mtd); - /* Chip sometimes reporting write protect even when it's not */ - out_8(ctrl->addr, in_8(ctrl->addr) | NAND_STATUS_WP); + /* + * The chip always seems to report that it is + * write-protected, even when it is not. + */ + if (chip->options & NAND_BUSWIDTH_16) + ifc_out16(ctrl->addr, + ifc_in16(ctrl->addr) | NAND_STATUS_WP); + else + out_8(ctrl->addr, in_8(ctrl->addr) | NAND_STATUS_WP); return; case NAND_CMD_RESET: @@ -618,7 +625,7 @@ static void fsl_ifc_write_buf(struct mtd_info *mtd, const u8 *buf, int len) len = bufsize - ctrl->index; } - memcpy_toio(&ctrl->addr[ctrl->index], buf, len); + memcpy_toio(ctrl->addr + ctrl->index, buf, len); ctrl->index += len; } @@ -631,11 +638,16 @@ static u8 fsl_ifc_read_byte(struct mtd_info *mtd) struct nand_chip *chip = mtd->priv; struct fsl_ifc_mtd *priv = chip->priv; struct fsl_ifc_ctrl *ctrl = priv->ctrl; + unsigned int offset; - /* If there are still bytes in the IFC buffer, then use the - * next byte. */ - if (ctrl->index < ctrl->read_bytes) - return in_8(&ctrl->addr[ctrl->index++]); + /* + * If there are still bytes in the IFC buffer, then use the + * next byte. + */ + if (ctrl->index < ctrl->read_bytes) { + offset = ctrl->index++; + return in_8(ctrl->addr + offset); + } printf("%s beyond end of buffer\n", __func__); return ERR_BYTE; @@ -657,8 +669,7 @@ static uint8_t fsl_ifc_read_byte16(struct mtd_info *mtd) * next byte. */ if (ctrl->index < ctrl->read_bytes) { - data = ifc_in16((uint16_t *)&ctrl-> - addr[ctrl->index]); + data = ifc_in16(ctrl->addr + ctrl->index); ctrl->index += 2; return (uint8_t)data; } @@ -681,7 +692,7 @@ static void fsl_ifc_read_buf(struct mtd_info *mtd, u8 *buf, int len) return; avail = min((unsigned int)len, ctrl->read_bytes - ctrl->index); - memcpy_fromio(buf, &ctrl->addr[ctrl->index], avail); + memcpy_fromio(buf, ctrl->addr + ctrl->index, avail); ctrl->index += avail; if (len > avail) |