diff options
Diffstat (limited to 'drivers/cs8900.c')
| -rw-r--r-- | drivers/cs8900.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/cs8900.c b/drivers/cs8900.c index 7165d60bd..224ab9590 100644 --- a/drivers/cs8900.c +++ b/drivers/cs8900.c @@ -272,6 +272,44 @@ retry: return 0; } +static void cs8900_e2prom_ready(void) +{ + while(get_reg(PP_SelfST) & SI_BUSY); +} + +/***********************************************************/ +/* read a 16-bit word out of the EEPROM */ +/***********************************************************/ + +int cs8900_e2prom_read(unsigned char addr, unsigned short *value) +{ + cs8900_e2prom_ready(); + put_reg(PP_EECMD, EEPROM_READ_CMD | addr); + cs8900_e2prom_ready(); + *value = get_reg(PP_EEData); + + return 0; +} + + +/***********************************************************/ +/* write a 16-bit word into the EEPROM */ +/***********************************************************/ + +void cs8900_e2prom_write(unsigned char addr, unsigned short value) +{ + cs8900_e2prom_ready(); + put_reg(PP_EECMD, EEPROM_WRITE_EN); + cs8900_e2prom_ready(); + put_reg(PP_EEData, value); + put_reg(PP_EECMD, EEPROM_WRITE_CMD | addr); + cs8900_e2prom_ready(); + put_reg(PP_EECMD, EEPROM_WRITE_DIS); + cs8900_e2prom_ready(); + + return 0; +} + #endif /* COMMANDS & CFG_NET */ #endif /* CONFIG_DRIVER_CS8900 */ |