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|
/*===============================================================*\
| 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.org/license/LICENSE. |
| |
+-----------------------------------------------------------------+
| this file contains the low level MPC83xx I2C driver parameters |
\*===============================================================*/
#include <mpc83xx/mpc83xx_i2cdrv.h>
#include <libchip/i2c-2b-eeprom.h>
#include <libchip/i2c-sc620.h>
#include <bsp/irq.h>
#include <bsp.h>
static void i2c1_probe(mpc83xx_i2c_softc_t *self)
{
#if MPC83XX_CHIP_TYPE != 8309
if (((mpc83xx.clk.sccr >> (31-1)) & 0x03) > 0) {
self->base_frq =
(BSP_bus_frequency
/((mpc83xx.clk.sccr >> (31-1)) & 0x03));
}
#else /* MPC83XX_CHIP_TYPE != 8309 */
self->base_frq = BSP_bus_frequency;
#endif /* MPC83XX_CHIP_TYPE != 8309 */
}
#ifndef MPC83XX_BOARD_BR_UID
static void i2c2_probe(mpc83xx_i2c_softc_t *self)
{
self->base_frq = BSP_bus_frequency;
}
#endif /* MPC83XX_BOARD_BR_UID */
static mpc83xx_i2c_desc_t mpc83xx_i2c_bus_tbl[] = {
/* 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 probe */
.probe = i2c1_probe
}
}
#ifndef MPC83XX_BOARD_BR_UID
/* second channel */
, {
{ /* public fields */
.ops = &mpc83xx_i2c_ops,
.size = sizeof(mpc83xx_i2c_bus_tbl[0]),
},
{ /* our private fields */
.reg_ptr = &mpc83xx.i2c[1],
.initialized = FALSE,
.irq_number = BSP_IPIC_IRQ_I2C2,
.base_frq = 0, /* will be set during probe */
.probe = i2c2_probe
}
}
#endif /* MPC83XX_BOARD_BR_UID */
};
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
rtems_status_code bsp_register_i2c
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| register I2C busses and devices |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
void /* <none> */
)
/*-------------------------------------------------------------------------*\
| Return Value: |
| 0 or error code |
\*=========================================================================*/
{
char device_path[] = "/dev/i2c?";
size_t n = RTEMS_ARRAY_SIZE(mpc83xx_i2c_bus_tbl);
size_t i;
int i2c_busno[n];
/*
* init I2C library (if not already done)
*/
rtems_libi2c_initialize ();
/*
* init I2C buses
*/
for (i = 0; i < n; ++i) {
mpc83xx_i2c_desc_t *desc = &mpc83xx_i2c_bus_tbl[i];
(*desc->softc.probe)(&desc->softc);
device_path[sizeof(device_path) - 2] = (char) ('1' + i);
i2c_busno[i] = rtems_libi2c_register_bus(device_path, &desc->bus_desc);
}
#ifdef RTEMS_BSP_I2C_EEPROM_DEVICE_NAME
if (n > 0) {
/*
* register EEPROM to bus 1, Address 0x50
*/
rtems_libi2c_register_drv(RTEMS_BSP_I2C_EEPROM_DEVICE_NAME,
i2c_2b_eeprom_driver_descriptor,
i2c_busno[0],0x50);
}
#endif /* RTEMS_BSP_I2C_EEPROM_DEVICE_NAME */
#ifdef MPC83XX_BOARD_BR_UID
if (n > 0) {
rtems_libi2c_register_drv(
"sc620",
&i2c_sc620_driver,
i2c_busno[0],
0x70
);
}
#endif /* MPC83XX_BOARD_BR_UID */
/*
* FIXME: register RTC driver, when available
*/
return RTEMS_SUCCESSFUL;
}
|
