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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright 2023 Toradex - https://www.toradex.com/
*/
#include "common.h"
#include <dm.h>
#include <fdt_support.h>
#include <linux/soc/ti/ti_sci_protocol.h>
#include "common_fdt.h"
static int fdt_fixup_msmc_ram(void *blob, char *parent_path, char *node_name)
{
u64 msmc_start = 0, msmc_end = 0, msmc_size, reg[2];
struct ti_sci_handle *ti_sci = get_ti_sci_handle();
int ret, node, subnode, len, prev_node;
u32 range[4], addr, size;
const fdt32_t *sub_reg;
ti_sci->ops.core_ops.query_msmc(ti_sci, &msmc_start, &msmc_end);
msmc_size = msmc_end - msmc_start + 1;
debug("%s: msmc_start = 0x%llx, msmc_size = 0x%llx\n", __func__,
msmc_start, msmc_size);
/* find or create "msmc_sram node */
ret = fdt_path_offset(blob, parent_path);
if (ret < 0)
return ret;
node = fdt_find_or_add_subnode(blob, ret, node_name);
if (node < 0)
return node;
ret = fdt_setprop_string(blob, node, "compatible", "mmio-sram");
if (ret < 0)
return ret;
reg[0] = cpu_to_fdt64(msmc_start);
reg[1] = cpu_to_fdt64(msmc_size);
ret = fdt_setprop(blob, node, "reg", reg, sizeof(reg));
if (ret < 0)
return ret;
fdt_setprop_cell(blob, node, "#address-cells", 1);
fdt_setprop_cell(blob, node, "#size-cells", 1);
range[0] = 0;
range[1] = cpu_to_fdt32(msmc_start >> 32);
range[2] = cpu_to_fdt32(msmc_start & 0xffffffff);
range[3] = cpu_to_fdt32(msmc_size);
ret = fdt_setprop(blob, node, "ranges", range, sizeof(range));
if (ret < 0)
return ret;
subnode = fdt_first_subnode(blob, node);
prev_node = 0;
/* Look for invalid subnodes and delete them */
while (subnode >= 0) {
sub_reg = fdt_getprop(blob, subnode, "reg", &len);
addr = fdt_read_number(sub_reg, 1);
sub_reg++;
size = fdt_read_number(sub_reg, 1);
debug("%s: subnode = %d, addr = 0x%x. size = 0x%x\n", __func__,
subnode, addr, size);
if (addr + size > msmc_size ||
!strncmp(fdt_get_name(blob, subnode, &len), "sysfw", 5) ||
!strncmp(fdt_get_name(blob, subnode, &len), "tifs", 4) ||
!strncmp(fdt_get_name(blob, subnode, &len), "l3cache", 7)) {
fdt_del_node(blob, subnode);
debug("%s: deleting subnode %d\n", __func__, subnode);
if (!prev_node)
subnode = fdt_first_subnode(blob, node);
else
subnode = fdt_next_subnode(blob, prev_node);
} else {
prev_node = subnode;
subnode = fdt_next_subnode(blob, prev_node);
}
}
return 0;
}
int fdt_fixup_msmc_ram_k3(void *blob)
{
int ret;
ret = fdt_fixup_msmc_ram(blob, "/bus@100000", "sram@70000000");
if (ret < 0)
ret = fdt_fixup_msmc_ram(blob, "/interconnect@100000",
"sram@70000000");
if (ret)
printf("%s: fixing up msmc ram failed %d\n", __func__, ret);
return ret;
}
int fdt_del_node_path(void *blob, const char *path)
{
int ret;
int nodeoff;
nodeoff = fdt_path_offset(blob, path);
if (nodeoff < 0)
return 0; /* Not found, skip it */
ret = fdt_del_node(blob, nodeoff);
if (ret < 0)
printf("Unable to delete node %s, err=%s\n", path, fdt_strerror(ret));
else
debug("Deleted node %s\n", path);
return ret;
}
int fdt_fixup_reserved(void *blob, const char *name,
unsigned int new_address, unsigned int new_size)
{
int nodeoffset, subnode;
int ret;
struct fdt_memory carveout = {
.start = new_address,
};
/* Find reserved-memory */
nodeoffset = fdt_subnode_offset(blob, 0, "reserved-memory");
if (nodeoffset < 0)
goto add_carveout;
/* Find existing matching subnode and remove it */
fdt_for_each_subnode(subnode, blob, nodeoffset) {
const char *node_name;
fdt_addr_t addr;
fdt_size_t size;
/* Name matching */
node_name = fdt_get_name(blob, subnode, NULL);
if (!name)
return -EINVAL;
if (!strncmp(node_name, name, strlen(name))) {
/* Read out old size first */
addr = fdtdec_get_addr_size(blob, subnode, "reg", &size);
if (addr == FDT_ADDR_T_NONE)
return -EINVAL;
new_size = size;
/* Delete node */
ret = fdt_del_node(blob, subnode);
if (ret < 0)
return ret;
/* Only one matching node */
break;
}
}
add_carveout:
carveout.end = new_address + new_size - 1;
ret = fdtdec_add_reserved_memory(blob, name, &carveout, NULL, 0, NULL,
FDTDEC_RESERVED_MEMORY_NO_MAP);
if (ret < 0)
return ret;
return 0;
}
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