Freescale eSDHC controller has the special order for the HOST version register. that is not same as the other's registers. The address of HOSTVER in spec is 0xFE, and we need use the in_be16(0xFE) to access it, not in_be16(0xFC).
Unified · Split
| @@ -55,7 +55,13 @@ static u32 esdhc_readl(struct sdhci_host *host, int reg) · 54 unmodified lines | ||
| 55 | 55 | |
| 56 | 56 | static u16 esdhc_readw(struct sdhci_host *host, int reg) |
| 57 | 57 | { |
| 58 | − return in_be16(host->ioaddr + (reg ^ 0x2)); | |
| 58 | + u16 ret; | |
| 59 | + | |
| 60 | + if (unlikely(reg == SDHCI_HOST_VERSION)) | |
| 61 | + ret = in_be16(host->ioaddr + reg); | |
| 62 | + else | |
| 63 | + ret = in_be16(host->ioaddr + (reg ^ 0x2)); | |
| 64 | + return ret; | |
| 59 | 65 | } |
| 60 | 66 | |
| 61 | 67 | static u8 esdhc_readb(struct sdhci_host *host, int reg) |