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/*
* U-Boot compatibility wrapper for the TP-Link TL-WDR4900 v1 board
*
* Copyright (c) 2013 Gabor Juhos <juhosg@openwrt.org>
*
* Based on:
* cuboot-85xx.c
* Author: Scott Wood <scottwood@freescale.com>
* Copyright (c) 2007 Freescale Semiconductor, Inc.
*
* simpleboot.c
* Authors: Scott Wood <scottwood@freescale.com>
* Grant Likely <grant.likely@secretlab.ca>
* Copyright (c) 2007 Freescale Semiconductor, Inc.
* Copyright (c) 2008 Secret Lab Technologies Ltd.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*/
#include "ops.h"
#include "types.h"
#include "io.h"
#include "stdio.h"
#include <libfdt.h>
BSS_STACK(4*1024);
static unsigned long bus_freq;
static unsigned long int_freq;
static u64 mem_size;
static unsigned char enetaddr[6];
static void process_boot_dtb(void *boot_dtb)
{
const u32 *na, *ns, *reg, *val32;
const char *path;
u64 memsize64;
int node, size, i;
/* Make sure FDT blob is sane */
if (fdt_check_header(boot_dtb) != 0)
fatal("Invalid device tree blob\n");
/* Find the #address-cells and #size-cells properties */
node = fdt_path_offset(boot_dtb, "/");
if (node < 0)
fatal("Cannot find root node\n");
na = fdt_getprop(boot_dtb, node, "#address-cells", &size);
if (!na || (size != 4))
fatal("Cannot find #address-cells property");
ns = fdt_getprop(boot_dtb, node, "#size-cells", &size);
if (!ns || (size != 4))
fatal("Cannot find #size-cells property");
/* Find the memory range */
node = fdt_node_offset_by_prop_value(boot_dtb, -1, "device_type",
"memory", sizeof("memory"));
if (node < 0)
fatal("Cannot find memory node\n");
reg = fdt_getprop(boot_dtb, node, "reg", &size);
if (size < (*na+*ns) * sizeof(u32))
fatal("cannot get memory range\n");
/* Only interested in memory based at 0 */
for (i = 0; i < *na; i++)
if (*reg++ != 0)
fatal("Memory range is not based at address 0\n");
/* get the memsize and trucate it to under 4G on 32 bit machines */
memsize64 = 0;
for (i = 0; i < *ns; i++)
memsize64 = (memsize64 << 32) | *reg++;
if (sizeof(void *) == 4 && memsize64 >= 0x100000000ULL)
memsize64 = 0xffffffff;
mem_size = memsize64;
/* get clock frequencies */
node = fdt_node_offset_by_prop_value(boot_dtb, -1, "device_type",
"cpu", sizeof("cpu"));
if (!node)
fatal("Cannot find cpu node\n");
val32 = fdt_getprop(boot_dtb, node, "clock-frequency", &size);
if (!val32 || (size != 4))
fatal("Cannot get clock frequency");
int_freq = *val32;
val32 = fdt_getprop(boot_dtb, node, "bus-frequency", &size);
if (!val32 || (size != 4))
fatal("Cannot get bus frequency");
bus_freq = *val32;
path = fdt_get_alias(boot_dtb, "ethernet0");
if (path) {
const void *p;
node = fdt_path_offset(boot_dtb, path);
if (node < 0)
fatal("Cannot find ethernet0 node");
p = fdt_getprop(boot_dtb, node, "mac-address", &size);
if (!p || (size < 6)) {
printf("no mac-address property, finding local\n\r");
p = fdt_getprop(boot_dtb, node, "local-mac-address", &size);
}
if (!p || (size < 6))
fatal("cannot get MAC addres");
memcpy(enetaddr, p, sizeof(enetaddr));
}
}
static void platform_fixups(void)
{
void *soc, *mpic;
dt_fixup_memory(0, mem_size);
dt_fixup_mac_address_by_alias("ethernet0", enetaddr);
dt_fixup_cpu_clocks(int_freq, bus_freq / 8, bus_freq);
/* Unfortunately, the specific model number is encoded in the
* soc node name in existing dts files -- once that is fixed,
* this can do a simple path lookup.
*/
soc = find_node_by_devtype(NULL, "soc");
if (soc) {
void *serial = NULL;
setprop(soc, "bus-frequency", &bus_freq, sizeof(bus_freq));
while ((serial = find_node_by_devtype(serial, "serial"))) {
if (get_parent(serial) != soc)
continue;
setprop(serial, "clock-frequency", &bus_freq,
sizeof(bus_freq));
}
}
mpic = find_node_by_compatible(NULL, "fsl,mpic");
if (mpic)
setprop(mpic, "clock-frequency", &bus_freq, sizeof(bus_freq));
}
void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7)
{
mem_size = 64 * 1024 * 1024;
simple_alloc_init(_end, mem_size - (u32)_end - 1024*1024, 32, 64);
fdt_init(_dtb_start);
serial_console_init();
printf("\n\r-- TL-WDR4900 v1 boot wrapper --\n\r");
process_boot_dtb((void *) r3);
platform_ops.fixups = platform_fixups;
}
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