/* SPDX-License-Identifier: BSD-2-Clause */
/*
* RTEMS support for MPC83xx
*
* This file contains the low level MPC83xx I2C driver parameters.
*/
/*
* Copyright (c) 2007 embedded brains GmbH & Co. KG
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#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);
}
#if defined(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);
}
#elif defined(MPC83XX_BOARD_BR_UID)
if (n > 0) {
rtems_libi2c_register_drv(
"sc620",
&i2c_sc620_driver,
i2c_busno[0],
0x70
);
}
#else
/*
* We have no i2c configuration for this variant but need to mark
* i2c_busno as used.
*/
(void) i2c_busno[0]; /* avoid set but not used warning */
#endif
/*
* FIXME: register RTC driver, when available
*/
return RTEMS_SUCCESSFUL;
}
