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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* Copyright (C) 2020 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 <rtems/sysinit.h>
#include <bsp.h>
#include <bsp/bootcard.h>
#include <bsp/fdt.h>
#include <bsp/imx-iomux.h>
#include <bsp/irq-generic.h>
#include <bsp/irq.h>
#include <bsp/linker-symbols.h>
#include <bsp/flash-headers.h>
#include <fsl/edma.h>
#include <fsl_clock.h>
#include <libfdt.h>
uint32_t imxrt_systick_frequency(void)
{
return CLOCK_GetCpuClkFreq();
}
static void imxrt_disable_wait_mode(void)
{
#if IMXRT_IS_MIMXRT10xx
/*
* Prevent processor from entering WAIT or SLEEP mode when a WFI is executed.
* This would switch off the normal interrupt controller and activate an
* alternative one. See "i.MX RT1050 Reference Manual, Rev. 4, 12/2019"
* chapter 14.6.3.2.1 "Entering WAIT mode".
*
* FIXME: For saving energy it would be a better solution to support the
* alternative interrupt controller. But that makes a bit of work necessary on
* every WFI.
*/
CLOCK_SetMode(kCLOCK_ModeRun);
#elif IMXRT_IS_MIMXRT11xx
/*
* i.MX RT11xx doesn't support disabling power saving for WFI. On the other
* hand it doesn't have a separate interrupt controller like the i.MX RT1050.
* So a power save during WFI is only annoying during debugging but doesn't
* hurt otherwise.
*/
#else
#error Disabling wait mode not implemented for this chip.
#endif
}
void bsp_start(void)
{
imxrt_disable_wait_mode();
bsp_interrupt_initialize();
rtems_cache_coherent_add_area(
bsp_section_nocacheheap_begin,
(uintptr_t) bsp_section_nocacheheap_size
);
}
const void *bsp_fdt_get(void)
{
return imxrt_dtb;
}
bool imxrt_fdt_node_is_enabled(const void *fdt, int node)
{
int len;
const uint32_t *val;
val = fdt_getprop(fdt, node, "status", &len);
if (val != NULL &&
(strcmp((char*)val, "ok") == 0 || strcmp((char*)val, "okay") == 0)) {
return true;
}
return false;
}
void *imx_get_reg_of_node(const void *fdt, int node)
{
int len;
const uint32_t *val;
val = fdt_getprop(fdt, node, "reg", &len);
if (val == NULL || len < 4) {
return NULL;
}
return (void *) fdt32_to_cpu(val[0]);
}
rtems_vector_number imx_get_irq_of_node(
const void *fdt,
int node,
size_t index
)
{
int len;
const uint32_t *val;
val = fdt_getprop(fdt, node, "interrupts", &len);
if (val == NULL || len < (int) ((index) * 4)) {
return BSP_INTERRUPT_VECTOR_INVALID;
}
return fdt32_to_cpu(val[index]);
}
uint32_t bsp_fdt_map_intr(const uint32_t *intr, size_t icells)
{
return intr[0];
}
/*
* Clock frequencies for peripherals like SD card. These are used by libbsd
* drivers.
*/
#if IMXRT_IS_MIMXRT11xx
uint32_t
imx_ccm_sdhci_hz(void)
{
/*
* We don't know which SDHCI is used. So just return the clock frequency
* of the first SDHCI and hope the best.
*/
return CLOCK_GetRootClockFreq(kCLOCK_Root_Usdhc1);
}
#endif
/* Make sure to pull in the flash headers */
__attribute__((used)) static const void *hdr_dcd = &imxrt_dcd_data;
__attribute__((used)) static const void *hdr_ivt = &imxrt_image_vector_table;
__attribute__((used)) static const void *hdr_btd = &imxrt_boot_data;
__attribute__((used)) static const void *hdr_fsc = &imxrt_flexspi_config;
/* pull in some drivers */
__attribute__((used)) static const void *drv_iomux = &imx_iomux_configure_pins;
RTEMS_SYSINIT_ITEM(imxrt_lpspi_init, RTEMS_SYSINIT_DEVICE_DRIVERS,
RTEMS_SYSINIT_ORDER_MIDDLE);
RTEMS_SYSINIT_ITEM(imxrt_lpi2c_init, RTEMS_SYSINIT_DEVICE_DRIVERS,
RTEMS_SYSINIT_ORDER_MIDDLE);
RTEMS_SYSINIT_ITEM(imxrt_ffec_init, RTEMS_SYSINIT_DEVICE_DRIVERS,
RTEMS_SYSINIT_ORDER_MIDDLE);
RTEMS_SYSINIT_ITEM(fsl_edma_init, RTEMS_SYSINIT_DEVICE_DRIVERS,
RTEMS_SYSINIT_ORDER_FIRST);
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