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bsp/mpc55xx: Add optional EBI configuration

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This commit is contained in:
Sebastian Huber
2012-11-26 17:02:44 +01:00
parent f4309b0398
commit e1e248f6af
4 changed files with 89 additions and 35 deletions
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1
c/src/lib/libbsp/powerpc/mpc55xxevb/Makefile.am
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@@ -78,6 +78,7 @@ libbsp_a_SOURCES += startup/reset.c
libbsp_a_SOURCES += startup/restart.c
libbsp_a_SOURCES += startup/idle-thread.c
libbsp_a_SOURCES += startup/start-config-clock.c
libbsp_a_SOURCES += startup/start-config-ebi.c
libbsp_a_SOURCES += startup/start-config-ebi-cs.c
libbsp_a_SOURCES += startup/start-config-ebi-cs-cal.c
libbsp_a_SOURCES += startup/start-config-mmu.c

15
c/src/lib/libbsp/powerpc/mpc55xxevb/include/mpc55xx-config.h
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@@ -93,8 +93,19 @@ extern BSP_START_DATA_SECTION const mpc55xx_clock_config
mpc55xx_start_config_clock [];
#ifdef MPC55XX_HAS_EBI
extern BSP_START_DATA_SECTION const struct
EBI_CS_tag mpc55xx_start_config_ebi_cs [];
typedef struct {
union EBI_MCR_tag ebi_mcr;
uint32_t siu_eccr_ebdf;
} mpc55xx_ebi_config;
extern BSP_START_DATA_SECTION const mpc55xx_ebi_config
mpc55xx_start_config_ebi [];
extern BSP_START_DATA_SECTION const size_t
mpc55xx_start_config_ebi_count [];
extern BSP_START_DATA_SECTION const struct EBI_CS_tag
mpc55xx_start_config_ebi_cs [];
extern BSP_START_DATA_SECTION const size_t
mpc55xx_start_config_ebi_cs_count [];

61
c/src/lib/libbsp/powerpc/mpc55xxevb/startup/start-config-ebi.c Normal file
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@@ -0,0 +1,61 @@
/**
* @file
*
* @ingroup mpc55xx
*
* @brief EBI configuration.
*/
/*
* Copyright (c) 2012 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Obere Lagerstr. 30
* 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.
*/
#include <bsp/mpc55xx-config.h>
#ifdef MPC55XX_HAS_EBI
const mpc55xx_ebi_config mpc55xx_start_config_ebi [] = {
#if defined(MPC55XX_BOARD_GWLCFM)
{
.ebi_mcr = {
.B = {
.DBM = 1,
.AD_MUX = 1, /* use multiplexed bus */
.D16_31 = 1 /* use lower AD bus */
}
},
.siu_eccr_ebdf = 4 - 1 /* use CLK/4 as bus clock */
}
#elif (defined(MPC55XX_BOARD_MPC5674FEVB) \
|| defined(MPC55XX_BOARD_MPC5674F_ECU508)) \
&& defined(MPC55XX_NEEDS_LOW_LEVEL_INIT)
{
.ebi_mcr = {
.B = {
.ACGE = 0,
.MDIS = 0,
.D16_31 = 1,
.AD_MUX = 0,
.DBM = 0
}
},
.siu_eccr_ebdf = 2 - 1
}
#endif
};
const size_t mpc55xx_start_config_ebi_count [] = {
RTEMS_ARRAY_SIZE(mpc55xx_start_config_ebi)
};
#endif /* MPC55XX_HAS_EBI */

29
c/src/lib/libbsp/powerpc/mpc55xxevb/startup/start-early.c
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@@ -145,7 +145,6 @@ static BSP_START_TEXT_SECTION void mpc55xx_start_siu(void)
static BSP_START_TEXT_SECTION void mpc55xx_start_ebi_chip_select(void)
{
#ifdef MPC55XX_NEEDS_LOW_LEVEL_INIT
#ifdef MPC55XX_HAS_EBI
size_t i = 0;
@@ -157,35 +156,17 @@ static BSP_START_TEXT_SECTION void mpc55xx_start_ebi_chip_select(void)
EBI.CAL_CS [i] = mpc55xx_start_config_ebi_cal_cs [i];
}
#endif
#endif
}
static BSP_START_TEXT_SECTION void mpc55xx_start_ebi(void)
{
#ifdef MPC55XX_NEEDS_LOW_LEVEL_INIT
#if defined(MPC55XX_BOARD_GWLCFM)
/*
* init EBI for Muxed AD bus
*/
EBI.MCR.B.DBM = 1;
EBI.MCR.B.AD_MUX = 1; /* use multiplexed bus */
EBI.MCR.B.D16_31 = 1; /* use lower AD bus */
#ifdef MPC55XX_HAS_EBI
size_t i = 0;
SIU.ECCR.B.EBDF = 3; /* use CLK/4 as bus clock */
#elif defined(MPC55XX_BOARD_MPC5674FEVB) \
|| defined(MPC55XX_BOARD_MPC5674F_ECU508)
union EBI_MCR_tag mcr = {
.B = {
.ACGE = 0,
.MDIS = 0,
.D16_31 = 1,
.AD_MUX = 0,
.DBM = 0
for (i = 0; i < mpc55xx_start_config_ebi_count [0]; ++i) {
SIU.ECCR.B.EBDF = mpc55xx_start_config_ebi [i].siu_eccr_ebdf;
EBI.MCR.R = mpc55xx_start_config_ebi [i].ebi_mcr.R;
}
};
EBI.MCR.R = mcr.R;
#endif
#endif
}