diff options
| -rw-r--r-- | board/rsk7203/rsk7203.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/board/rsk7203/rsk7203.c b/board/rsk7203/rsk7203.c index beb943e..2d74359 100644 --- a/board/rsk7203/rsk7203.c +++ b/board/rsk7203/rsk7203.c @@ -48,3 +48,24 @@ int dram_init(void) void led_set_state(unsigned short value) { } + +/* + * The RSK board has the SMSC9118 wired up 'incorrectly'. + * Byte-swapping is necessary, and so poor performance is inevitable. + * This problem cannot evade by the swap function of CHIP, this can + * evade by software Byte-swapping. + * And this has problem by FIFO access only. pkt_data_pull/pkt_data_push + * functions necessary to solve this problem. + */ +u32 pkt_data_pull(u32 addr) +{ + volatile u16 *addr_16 = (u16 *)addr; + return (u32)((swab16(*addr_16) << 16) & 0xFFFF0000)\ + | swab16(*(addr_16 + 1)); +} + +void pkt_data_push(u32 addr, u32 val) +{ + *(volatile u16 *)(addr + 2) = swab16((u16)val); + *(volatile u16 *)(addr) = swab16((u16)(val >> 16)); +} |