/*===============================================================*\
| Project: RTEMS support for MPC83xx |
+-----------------------------------------------------------------+
| Copyright (c) 2007 |
| Embedded Brains GmbH |
| Obere Lagerstr. 30 |
| D-82178 Puchheim |
| Germany |
| rtems@embedded-brains.de |
+-----------------------------------------------------------------+
| The license and distribution terms for this file may be |
| found in the file LICENSE in this distribution or at |
| |
| http://www.rtems.com/license/LICENSE. |
| |
+-----------------------------------------------------------------+
| this file contains the low level MPC83xx I2C driver parameters |
\*===============================================================*/
#include <mpc83xx/mpc83xx_i2cdrv.h>
#include <libchip/i2c-2b-eeprom.h>
#include <bsp/irq.h>
#include <bsp.h>
static mpc83xx_i2c_desc_t mpc83xx_i2c_bus_tbl[2] = {
/* first channel */
{
{/* public fields */
.ops = &mpc83xx_i2c_ops,
.size = sizeof(mpc83xx_i2c_bus_tbl[0]),
},
{ /* our private fields */
.reg_ptr = &mpc83xx.i2c[0],
.initialized = FALSE,
.irq_number = BSP_IPIC_IRQ_I2C1,
.base_frq = 0 /* will be set during initiailization */
}
},
/* second channel */
{
{ /* public fields */
.ops = &mpc83xx_i2c_ops,
.size = sizeof(mpc83xx_i2c_bus_tbl[1]),
},
{ /* our private fields */
.reg_ptr = &mpc83xx.i2c[1],
.initialized = FALSE,
.irq_number = BSP_IPIC_IRQ_I2C2,
.base_frq = 0 /* will be set during initiailization */
}
}
};
rtems_libi2c_bus_t *mpc83xx_i2c_bus_descriptor[2] = {
&mpc83xx_i2c_bus_tbl[0].bus_desc,
&mpc83xx_i2c_bus_tbl[1].bus_desc
};
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
rtems_status_code bsp_register_i2c
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| register I2C busses and devices |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
void /* <none> */
)
/*-------------------------------------------------------------------------*\
| Return Value: |
| 0 or error code |
\*=========================================================================*/
{
int ret_code;
int i2c1_busno,i2c2_busno;
/*
* init I2C library (if not already done)
*/
rtems_libi2c_initialize ();
/*
* update input frequency of I2c modules into descriptor
*/
/*
* I2C1 is clocked with TSEC 1
*/
if (((mpc83xx.clk.sccr >> (31-1)) & 0x03) > 0) {
mpc83xx_i2c_bus_tbl[0].softc.base_frq =
(BSP_bus_frequency
/((mpc83xx.clk.sccr >> (31-1)) & 0x03));
}
mpc83xx_i2c_bus_tbl[1].softc.base_frq = BSP_bus_frequency;
/*
* register first I2C bus
*/
ret_code = rtems_libi2c_register_bus("/dev/i2c1",
mpc83xx_i2c_bus_descriptor[0]);
if (ret_code < 0) {
return -ret_code;
}
i2c1_busno = ret_code;
/*
* register second I2C bus
*/
ret_code = rtems_libi2c_register_bus("/dev/i2c2",
mpc83xx_i2c_bus_descriptor[1]);
if (ret_code < 0) {
return -ret_code;
}
i2c2_busno = ret_code;
#ifdef RTEMS_BSP_I2C_EEPROM_DEVICE_NAME
/*
* register EEPROM to bus 1, Address 0x50
*/
ret_code = rtems_libi2c_register_drv(RTEMS_BSP_I2C_EEPROM_DEVICE_NAME,
i2c_2b_eeprom_driver_descriptor,
i2c1_busno,0x50);
if (ret_code < 0) {
return -ret_code;
}
#endif /* RTEMS_BSP_I2C_EEPROM_DEVICE_NAME */
/*
* FIXME: register RTC driver, when available
*/
return 0;
}
