sb1250/src/dev_sb1250_24lc128eeprom.c

114     *  smbus_init(chan)
119     *  	   chan - channel # (0 or 1)
125 static void smbus_init(int chan)
129     reg = PHYS_TO_K1(A_SMB_REGISTER(chan,R_SMB_FREQ));
133     reg = PHYS_TO_K1(A_SMB_REGISTER(chan,R_SMB_CONTROL));
140     *  smbus_waitready(chan)
146     *  	   chan - channel (0 or 1)
151 static int smbus_waitready(int chan)
156     reg = PHYS_TO_K1(A_SMB_REGISTER(chan,R_SMB_STATUS));
173     *  smbus_readbyte(chan,slaveaddr,devaddr)
179     *  	   chan - SMBus channel
188 static int smbus_readbyte(int chan,int slaveaddr,int devaddr)
198     if (smbus_waitready(chan) < 0) return -1;
206     reg = PHYS_TO_K1(A_SMB_REGISTER(chan,R_SMB_CMD));
213     reg = PHYS_TO_K1(A_SMB_REGISTER(chan,R_SMB_DATA));
220     reg = PHYS_TO_K1(A_SMB_REGISTER(chan,R_SMB_START));
227     err = smbus_waitready(chan);
236     err = smbus_waitready(chan);
239     reg = PHYS_TO_K1(A_SMB_REGISTER(chan,R_SMB_DATA));
246     *  smbus_writebyte(chan,slaveaddr,devaddr,b)
252     *  	   chan - SMBus channel
263 static int smbus_writebyte(int chan,int slaveaddr,int devaddr,int b)
274     if (smbus_waitready(chan) < 0) return -1;
282     reg = PHYS_TO_K1(A_SMB_REGISTER(chan,R_SMB_CMD));
289     reg = PHYS_TO_K1(A_SMB_REGISTER(chan,R_SMB_DATA));
298     reg = PHYS_TO_K1(A_SMB_REGISTER(chan,R_SMB_START));
305     err = smbus_waitready(chan);
322 	err = smbus_waitready(chan);