[U-Boot-Users] [PATCH] I2C EEPROM simulator

[Ricardo Ribalda Delgado]

Minor Changes to previous patch

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda at uam.es>
---
This driver provides access to a simulated i2c eeprom.
This simulated eeprom could be very useful in boards with
ddr2 memories and no i2c interfaces.

Using this driver the user can simulate a spd eeprom
of a ddr2 memory and use the ddr2 auto config.

User can use the macros CONFIG_EEPROM_SIMUL_LEN
and CONFIG_EEPROM_SIMUL_DATA to define the content
of the simulated eeprom

 drivers/i2c/Makefile       |    1 +
 drivers/i2c/eeprom_simul.c |   68 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 69 insertions(+), 0 deletions(-)
 create mode 100644 drivers/i2c/eeprom_simul.c

diff --git a/drivers/i2c/Makefile b/drivers/i2c/Makefile
index 534c015..2aeabe5 100644
--- a/drivers/i2c/Makefile
+++ b/drivers/i2c/Makefile
@@ -30,6 +30,7 @@ COBJS-y += omap1510_i2c.o
 COBJS-y += omap24xx_i2c.o
 COBJS-y += tsi108_i2c.o
 COBJS-y += mxc_i2c.o
+COBJS-$(CONFIG_EEPROM_SIMUL) += eeprom_simul.o
 
 COBJS	:= $(COBJS-y)
 SRCS	:= $(COBJS:.o=.c)
diff --git a/drivers/i2c/eeprom_simul.c b/drivers/i2c/eeprom_simul.c
new file mode 100644
index 0000000..d8dbb3b
--- /dev/null
+++ b/drivers/i2c/eeprom_simul.c
@@ -0,0 +1,68 @@
+/*
+    (C) Copyright 2008
+    Ricado Ribalda-Universidad Autonoma de Madrid-ricardo.ribalda at uam.es
+    This work has been supported by: QTechnology  http://qtec.com/
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <common.h>
+#include <i2c.h>
+
+#ifndef CONFIG_EEPROM_SIMUL_LEN
+#define CONFIG_EEPROM_SIMUL_LEN 256
+#endif
+
+u8 eeprom_simul_buffer[CONFIG_EEPROM_SIMUL_LEN]
+#ifdef CONFIG_EEPROM_SIMUL_DATA
+       = CONFIG_EEPROM_SIMUL_DATA
+#endif
+;
+
+void i2c_init(int speed, int slaveaddr){
+       return ;
+}
+
+int i2c_read(uchar chip, uint addr, int alen, uchar * buffer, int len)
+{
+       int i;
+
+       if (addr+len>CONFIG_EEPROM_SIMUL_LEN)
+               return -1;
+
+       for(i=0;i<len;i++){
+               buffer[i]=eeprom_simul_buffer[i+addr];
+       }
+
+       return 0;
+}
+int i2c_write(uchar chip, uint addr, int alen, uchar * buffer, int len)
+{
+       int i;
+
+       if (addr+len>CONFIG_EEPROM_SIMUL_LEN)
+               return -1;
+
+       for(i=0;i<len;i++){
+               eeprom_simul_buffer[i+addr]=buffer[i];
+       }
+
+       return 0;
+}
+
+int i2c_probe(uchar chip)
+{
+       return 0;
+}
+
-- 
1.5.6.2