* Patches by David Müller, 31 Jan 2003:
- 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
diff --git a/drivers/cs8900.c b/drivers/cs8900.c
index 7165d60..224ab95 100644
--- a/drivers/cs8900.c
+++ b/drivers/cs8900.c
@@ -272,6 +272,44 @@
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 */