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/**
* @file
*
* @ingroup arm_start
*
* @brief Raspberry pi startup code.
*/
/*
* Copyright (c) 2013 by Alan Cudmore
*
* 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
*/
#include <bsp.h>
#include <bsp/bootcard.h>
#include <bsp/irq-generic.h>
#include <bsp/irq.h>
#include <bsp/linker-symbols.h>
#include <bsp/stackalloc.h>
#include <bsp/raspberrypi.h>
#include <bsp/vc.h>
#include <bsp/fdt.h>
#include <libfdt.h>
static const struct {
uint32_t code;
const char* label;
} rpi_codes[] =
{
{ 0x900021, "A+ 1.1 (512MB)" },
{ 0x900032, "B+ 1.2 (512MB)" },
{ 0x900092, "Zero 1.2 (512MB)" },
{ 0x900093, "Zero 1.3 (512MB)" },
{ 0x9000c1, "Zero W 1.1 (512MB)" },
{ 0x9020e0, "3A+ 1.0 (512MB)" },
{ 0x920092, "Zero 1.2 (512MB)" },
{ 0x920093, "Zero 1.3 (512MB)" },
{ 0x900061, "CM 1.1 (512MB)" },
{ 0xa01040, "2B 1.0 (1GB)" },
{ 0xa01041, "2B 1.1 (1GB)" },
{ 0xa02082, "3B 1.2 (1GB)" },
{ 0xa020a0, "CM3 1.0 (1GB)" },
{ 0xa020d3, "3B+ 1.3 (1GB)" },
{ 0xa21041, "2B 1.1 (1GB)" },
{ 0xa22042, "2B 1,2 (with BCM2837) (1GB)" },
{ 0xa22082, "3B 1.2 (1GB)" },
{ 0xa220a0, "CM3 1.0 (1GB)" },
{ 0xa32082, "3B 1.2 (1GB)" },
{ 0xa52082, "3B 1.2 (1GB)" },
{ 0xa22083, "3B 1.3 (1GB)" },
{ 0xa02100, "CM3+ 1.0 (1GB)" },
{ 0xa03111, "4B 1.1 (1GB)" },
{ 0xb03111, "4B 1.1 (2GB)" },
{ 0xc03111, "4B 1.1 (4GB)" },
};
static const char* rpi_types[] = {
"A",
"B",
"A+",
"B+",
"2B",
"Alpha (early prototype)",
"CM1",
"3B",
"Zero",
"CM3",
"Zero W",
"3B+",
"3A+",
"Internal use only",
"CM3+",
"4B",
};
static const char* rpi_mem[] =
{
"256MB",
"512MB",
"1GB",
"2GB",
"4GB"
};
#define NUMOF(_s) (sizeof(_s) / sizeof(_s[0]))
void *raspberrypi_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 (BUS_TO_PHY((void *) fdt32_to_cpu(val[0])));
}
#ifdef BSP_FDT_IS_SUPPORTED
uint32_t bsp_fdt_map_intr(const uint32_t *intr, size_t icells)
{
uint32_t controller = intr[0];
uint32_t source = intr[1];
switch ( controller ) {
case 0:
return source + BCM2835_IRQ_ID_BASIC_BASE_ID;
break;
case 1:
return source + BCM2835_IRQ_SET1_MIN;
break;
case 2:
return source + BCM2835_IRQ_SET2_MIN;
break;
default:
return BSP_INTERRUPT_VECTOR_INVALID;
break;
}
}
#endif /* BSP_FDT_IS_SUPPORTED */
void bsp_start(void)
{
bcm2835_get_board_spec_entries spec = { 0 };
printk("\nRTEMS RPi ");
if (bcm2835_mailbox_get_board_revision( &spec ) >= 0) {
size_t i;
for (i = 0; i < NUMOF(rpi_codes); ++i) {
if (rpi_codes[i].code == spec.spec) {
printk("%s [%08x]", rpi_codes[i].label, spec.spec);
break;
}
}
if (i >= NUMOF(rpi_codes)) {
uint32_t type = (spec.spec >> 4) & 0xff;
uint32_t mem = (spec.spec >> (4 + 4 + 8 + 4)) & 0xf;
printk(" unknown code [%08x] ", spec.spec);
if (type < NUMOF(rpi_types))
printk(rpi_types[type]);
else
printk("type: %02x", type);
if (mem < NUMOF(rpi_mem))
printk(" %s", rpi_mem[mem]);
else
printk(" mem: %x", mem);
}
printk("\n");
}
else {
printk(": ERROR reading mailbox\n");
}
bsp_interrupt_initialize();
}
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