omap: gpmc: 'nandecc sw' can use HAM1 or BCH8

[u-boot] / drivers / mtd / nand / omap_gpmc.c

diff --git a/drivers/mtd/nand/omap_gpmc.c b/drivers/mtd/nand/omap_gpmc.c
index 24123fcfe536d73861d4de51a19e6257b0fe2ac7..610f9698e15b99dd4b662c8495ba809d05acaba2 100644 (file)
--- a/drivers/mtd/nand/omap_gpmc.c
+++ b/drivers/mtd/nand/omap_gpmc.c
@@ -30,13 +30,22 @@ static u8  bch8_polynomial[] = {0xef, 0x51, 0x2e, 0x09, 0xed, 0x93, 0x9a, 0xc2,
 static uint8_t cs_next;
 static __maybe_unused struct nand_ecclayout omap_ecclayout;
 
+#if defined(CONFIG_NAND_OMAP_GPMC_WSCFG)
+static const int8_t wscfg[CONFIG_SYS_MAX_NAND_DEVICE] =
+       { CONFIG_NAND_OMAP_GPMC_WSCFG };
+#else
+/* wscfg is preset to zero since its a static variable */
+static const int8_t wscfg[CONFIG_SYS_MAX_NAND_DEVICE];
+#endif
+
 /*
  * Driver configurations
  */
 struct omap_nand_info {
        struct bch_control *control;
        enum omap_ecc ecc_scheme;
-       int cs;
+       uint8_t cs;
+       uint8_t ws;             /* wait status pin (0,1) */
 };
 
 /* We are wasting a bit of memory but al least we are safe */
@@ -76,7 +85,9 @@ static void omap_nand_hwcontrol(struct mtd_info *mtd, int32_t cmd,
 /* Check wait pin as dev ready indicator */
 static int omap_dev_ready(struct mtd_info *mtd)
 {
-       return gpmc_cfg->status & (1 << 8);
+       register struct nand_chip *this = mtd->priv;
+       struct omap_nand_info *info = this->priv;
+       return gpmc_cfg->status & (1 << (8 + info->ws));
 }
 
 /*
@@ -901,8 +912,18 @@ int __maybe_unused omap_nand_switch_ecc(uint32_t hardware, uint32_t eccstrength)
                        return -EINVAL;
                }
        } else {
-               err = omap_select_ecc_scheme(nand, OMAP_ECC_HAM1_CODE_SW,
+               if (eccstrength == 1) {
+                       err = omap_select_ecc_scheme(nand,
+                                       OMAP_ECC_HAM1_CODE_SW,
                                        mtd->writesize, mtd->oobsize);
+               } else if (eccstrength == 8) {
+                       err = omap_select_ecc_scheme(nand,
+                                       OMAP_ECC_BCH8_CODE_HW_DETECTION_SW,
+                                       mtd->writesize, mtd->oobsize);
+               } else {
+                       printf("nand: error: unsupported ECC scheme\n");
+                       return -EINVAL;
+               }
        }
 
        /* Update NAND handling after ECC mode switch */
@@ -962,6 +983,7 @@ int board_nand_init(struct nand_chip *nand)
        nand->IO_ADDR_W = (void __iomem *)&gpmc_cfg->cs[cs].nand_cmd;
        omap_nand_info[cs].control = NULL;
        omap_nand_info[cs].cs = cs;
+       omap_nand_info[cs].ws = wscfg[cs];
        nand->priv      = &omap_nand_info[cs];
        nand->cmd_ctrl  = omap_nand_hwcontrol;
        nand->options   |= NAND_NO_PADDING | NAND_CACHEPRG;