mpc55xxevb/i2c/i2c_init.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /*
0004  * RTEMS support for GWLCFM
0005  *
0006  * This file contains the low level MPC5516 I2C driver parameters.
0007  */
0008
0009 /*
0010  * Copyright (c) 2010 embedded brains GmbH & Co. KG
0011  *
0012  * Redistribution and use in source and binary forms, with or without
0013  * modification, are permitted provided that the following conditions
0014  * are met:
0015  * 1. Redistributions of source code must retain the above copyright
0016  *    notice, this list of conditions and the following disclaimer.
0017  * 2. Redistributions in binary form must reproduce the above copyright
0018  *    notice, this list of conditions and the following disclaimer in the
0019  *    documentation and/or other materials provided with the distribution.
0020  *
0021  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0022  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0023  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0024  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0025  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0026  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0027  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0028  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0029  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0030  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0031  * POSSIBILITY OF SUCH DAMAGE.
0032  */
0033
0034 #include <libchip/i2c-2b-eeprom.h>
0035
0036 #include <bsp.h>
0037 #include <bsp/irq.h>
0038 #include <mpc83xx/mpc83xx_i2cdrv.h>
0039
0040 #if MPC55XX_CHIP_FAMILY == 551
0041   static void i2c_probe(mpc83xx_i2c_softc_t *self)
0042   {
0043     self->base_frq = bsp_clock_speed;
0044   }
0045
0046   static mpc83xx_i2c_desc_t mpc55xx_i2c_bus = {
0047     .bus_desc = {
0048       .ops = &mpc83xx_i2c_ops,
0049       .size = sizeof(mpc55xx_i2c_bus),
0050     },
0051     .softc = {
0052       .reg_ptr = (m83xxI2CRegisters_t *) 0xfff88000,
0053       .initialized = FALSE,
0054       .irq_number = MPC55XX_IRQ_I2C(0),
0055       .base_frq = 0,
0056       .probe = i2c_probe
0057     }
0058   };
0059
0060   rtems_status_code bsp_register_i2c(void)
0061   {
0062     int rv = 0;
0063     int busno = 0;
0064
0065     rtems_libi2c_initialize ();
0066
0067     busno = rtems_libi2c_register_bus(
0068       "/dev/i2c1",
0069       &mpc55xx_i2c_bus.bus_desc
0070     );
0071     if (busno < 0) {
0072       return RTEMS_IO_ERROR;
0073     }
0074
0075     #ifdef RTEMS_BSP_I2C_EEPROM_DEVICE_NAME
0076       rv = rtems_libi2c_register_drv(
0077         RTEMS_BSP_I2C_EEPROM_DEVICE_NAME,
0078         i2c_2b_eeprom_driver_descriptor,
0079         busno,
0080         0x51
0081       );
0082       if (rv < 0) {
0083         return RTEMS_IO_ERROR;
0084       }
0085     #endif
0086
0087     return RTEMS_SUCCESSFUL;
0088   }
0089 #endif