diff options
Diffstat (limited to 'drivers/tsec.c')
| -rw-r--r-- | drivers/tsec.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/tsec.c b/drivers/tsec.c index c011123494..fd21ed4edc 100644 --- a/drivers/tsec.c +++ b/drivers/tsec.c @@ -129,6 +129,9 @@ static int tsec_miiphy_write(char *devname, unsigned char addr, unsigned char reg, unsigned short value); static int tsec_miiphy_read(char *devname, unsigned char addr, unsigned char reg, unsigned short *value); +#ifdef CONFIG_MCAST_TFTP +static int tsec_mcast_addr (struct eth_device *dev, u8 mcast_mac, u8 set); +#endif /* Initialize device structure. Returns success if PHY * initialization succeeded (i.e. if it recognizes the PHY) @@ -167,6 +170,9 @@ int tsec_initialize(bd_t * bis, int index, char *devname) dev->halt = tsec_halt; dev->send = tsec_send; dev->recv = tsec_recv; +#ifdef CONFIG_MCAST_TFTP + dev->mcast = tsec_mcast_addr; +#endif /* Tell u-boot to get the addr from the env */ for (i = 0; i < 6; i++) @@ -1539,4 +1545,46 @@ static int tsec_miiphy_write(char *devname, unsigned char addr, #endif +#ifdef CONFIG_MCAST_TFTP + +/* CREDITS: linux gianfar driver, slightly adjusted... thanx. */ + +/* Set the appropriate hash bit for the given addr */ + +/* The algorithm works like so: + * 1) Take the Destination Address (ie the multicast address), and + * do a CRC on it (little endian), and reverse the bits of the + * result. + * 2) Use the 8 most significant bits as a hash into a 256-entry + * table. The table is controlled through 8 32-bit registers: + * gaddr0-7. gaddr0's MSB is entry 0, and gaddr7's LSB is + * gaddr7. This means that the 3 most significant bits in the + * hash index which gaddr register to use, and the 5 other bits + * indicate which bit (assuming an IBM numbering scheme, which + * for PowerPC (tm) is usually the case) in the tregister holds + * the entry. */ +static int +tsec_mcast_addr (struct eth_device *dev, u8 mcast_mac, u8 set) +{ + struct tsec_private *priv = privlist[1]; + volatile tsec_t *regs = priv->regs; + volatile u32 *reg_array, value; + u8 result, whichbit, whichreg; + + result = (u8)((ether_crc(MAC_ADDR_LEN,mcast_mac) >> 24) & 0xff); + whichbit = result & 0x1f; /* the 5 LSB = which bit to set */ + whichreg = result >> 5; /* the 3 MSB = which reg to set it in */ + value = (1 << (31-whichbit)); + + reg_array = &(regs->hash.gaddr0); + + if (set) { + reg_array[whichreg] |= value; + } else { + reg_array[whichreg] &= ~value; + } + return 0; +} +#endif /* Multicast TFTP ? */ + #endif /* CONFIG_TSEC_ENET */ |