130 lines
3.6 KiB
C
130 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2016 Freescale Semiconductor, Inc.
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*/
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#include <asm/io.h>
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#include <env.h>
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#include <fsl_qe.h> /* For struct qe_firmware */
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#ifdef CONFIG_SYS_DPAA_FMAN
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/**
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* fdt_fixup_fman_firmware -- insert the Fman firmware into the device tree
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*
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* The binding for an Fman firmware node is documented in
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* Documentation/powerpc/dts-bindings/fsl/dpaa/fman.txt. This node contains
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* the actual Fman firmware binary data. The operating system is expected to
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* be able to parse the binary data to determine any attributes it needs.
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*/
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void fdt_fixup_fman_firmware(void *blob)
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{
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int rc, fmnode, fwnode = -1;
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uint32_t phandle;
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struct qe_firmware *fmanfw;
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const struct qe_header *hdr;
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unsigned int length;
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uint32_t crc;
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const char *p;
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/* The first Fman we find will contain the actual firmware. */
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fmnode = fdt_node_offset_by_compatible(blob, -1, "fsl,fman");
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if (fmnode < 0)
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/* Exit silently if there are no Fman devices */
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return;
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/* If we already have a firmware node, then also exit silently. */
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if (fdt_node_offset_by_compatible(blob, -1, "fsl,fman-firmware") > 0)
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return;
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/* If the environment variable is not set, then exit silently */
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p = env_get("fman_ucode");
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if (!p)
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return;
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fmanfw = (struct qe_firmware *)simple_strtoul(p, NULL, 16);
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if (!fmanfw)
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return;
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hdr = &fmanfw->header;
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length = fdt32_to_cpu(hdr->length);
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/* Verify the firmware. */
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if ((hdr->magic[0] != 'Q') || (hdr->magic[1] != 'E') ||
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(hdr->magic[2] != 'F')) {
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printf("Data at %p is not an Fman firmware\n", fmanfw);
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return;
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}
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if (length > CONFIG_SYS_QE_FMAN_FW_LENGTH) {
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printf("Fman firmware at %p is too large (size=%u)\n",
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fmanfw, length);
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return;
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}
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length -= sizeof(u32); /* Subtract the size of the CRC */
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crc = fdt32_to_cpu(*(u32 *)((void *)fmanfw + length));
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if (crc != crc32_no_comp(0, (void *)fmanfw, length)) {
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printf("Fman firmware at %p has invalid CRC\n", fmanfw);
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return;
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}
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length += sizeof(u32);
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/* Increase the size of the fdt to make room for the node. */
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rc = fdt_increase_size(blob, length);
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if (rc < 0) {
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printf("Unable to make room for Fman firmware: %s\n",
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fdt_strerror(rc));
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return;
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}
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/* Create the firmware node. */
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fwnode = fdt_add_subnode(blob, fmnode, "fman-firmware");
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if (fwnode < 0) {
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char s[64];
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fdt_get_path(blob, fmnode, s, sizeof(s));
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printf("Could not add firmware node to %s: %s\n", s,
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fdt_strerror(fwnode));
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return;
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}
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rc = fdt_setprop_string(blob, fwnode, "compatible",
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"fsl,fman-firmware");
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if (rc < 0) {
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char s[64];
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fdt_get_path(blob, fwnode, s, sizeof(s));
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printf("Could not add compatible property to node %s: %s\n", s,
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fdt_strerror(rc));
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return;
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}
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phandle = fdt_create_phandle(blob, fwnode);
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if (!phandle) {
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char s[64];
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fdt_get_path(blob, fwnode, s, sizeof(s));
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printf("Could not add phandle property to node %s: %s\n", s,
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fdt_strerror(rc));
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return;
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}
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rc = fdt_setprop(blob, fwnode, "fsl,firmware", fmanfw, length);
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if (rc < 0) {
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char s[64];
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fdt_get_path(blob, fwnode, s, sizeof(s));
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printf("Could not add firmware property to node %s: %s\n", s,
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fdt_strerror(rc));
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return;
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}
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/* Find all other Fman nodes and point them to the firmware node. */
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while ((fmnode = fdt_node_offset_by_compatible(blob, fmnode,
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"fsl,fman")) > 0) {
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rc = fdt_setprop_cell(blob, fmnode, "fsl,firmware-phandle",
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phandle);
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if (rc < 0) {
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char s[64];
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fdt_get_path(blob, fmnode, s, sizeof(s));
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printf("Could not add pointer property to node %s: %s\n",
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s, fdt_strerror(rc));
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return;
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}
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}
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}
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#endif
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