This driver provides access to a false i2c eeprom. This false eeprom could be very useful in boards with ddr2 memories and no i2c interfaces. Using this driver the user can simulate the spd interface of the ddr2 memory and use the ddr2 auto config
Signed-off-by: Ricardo Ribalda Delgado ricardo.ribalda@uam.es --- drivers/i2c/Makefile | 1 + drivers/i2c/dummy_i2c.c | 65 +++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 66 insertions(+), 0 deletions(-) create mode 100644 drivers/i2c/dummy_i2c.c
diff --git a/drivers/i2c/Makefile b/drivers/i2c/Makefile index 534c015..94a0791 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_DUMMY_I2C) += dummy_i2c.o
COBJS := $(COBJS-y) SRCS := $(COBJS:.o=.c) diff --git a/drivers/i2c/dummy_i2c.c b/drivers/i2c/dummy_i2c.c new file mode 100644 index 0000000..ce859c3 --- /dev/null +++ b/drivers/i2c/dummy_i2c.c @@ -0,0 +1,65 @@ +/* + (C) Copyright 2008 + Ricado Ribalda-Universidad Autonoma de Madrid-ricardo.ribalda@uam.es + This work has been supported by: Q-Technology 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> + +#define DUMMY_I2C_LEN 256 + +u8 i2c_dummy_buffer[DUMMY_I2C_LEN]= CONFIG_DUMMY_I2C_DATA; + +void i2c_init(int speed, int slaveaddr){ + return ; +} + +int i2c_read(uchar chip, uint addr, int alen, uchar * buffer, int len) +{ + int i; + if (alen!=1) + return -1; + + if (addr+len>DUMMY_I2C_LEN) + return -1; + + for(i=0;i<len;i++){ + buffer[i]=i2c_dummy_buffer[i+addr]; + } + + return 0; +} +int i2c_write(uchar chip, uint addr, int alen, uchar * buffer, int len) +{ + int i; + if (alen!=1) + return -1; + if (addr+len>DUMMY_I2C_LEN) + return -1; + + for(i=0;i<len;i++){ + i2c_dummy_buffer[i+addr]=buffer[i]; + } + + return 0; +} + +int i2c_probe(uchar chip) +{ + return 0; +} +