diff options
| author | wdenk <wdenk> | 2003-03-06 21:55:29 +0000 |
|---|---|---|
| committer | wdenk <wdenk> | 2003-03-06 21:55:29 +0000 |
| commit | 1cb8e980c41e86760fa93de63f4e4cf643bef9d9 (patch) | |
| tree | e1993fba07dea51d92f1cec4c814a67173c1f8fb /drivers/cs8900.c | |
| parent | 500545cc6b83958209128bffa825b3c842a21a4e (diff) | |
* Patches by David Müller, 31 Jan 2003:LABEL_2003_03_06_2255
- minimal setup for CardBus bridges
- add EEPROM read/write support in the CS8900 driver
- add support for the builtin I2C controller in the Samsung s3c24x0 chips
- add support for MPL's VCMA9 (Samsung s3c2410 based) board
* Patch by Steven Scholz, 04 Feb 2003:
add support for RTC DS1307
* Patch by Reinhard Meyer, 5 Feb 2003:
fix PLPRCR/SCCR init sequence on 8xx to allow for
changes of EBDF by software
* Patch by Vladimir Gurevich, 07 Feb 2003:
"API-compatibility patch" for 4xx I2C driver
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 */ |