fm: fdt: Move fman ucode fixup to driver code

Not only powerpc/mpc85xx but also Freescale Layerscape platforms will
use fdt_fixup_fman_firmware() to insert Fman ucode blob into the device
tree. So move the function to Fman driver code.

Signed-off-by: Gong Qianyu <Qianyu.Gong@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>

1 files changed, 128 insertions, 0 deletions

diff --git a/drivers/net/fm/fdt.c b/drivers/net/fm/fdt.c
new file mode 100644
index 0000000..830d228
--- /dev/null
+++ b/drivers/net/fm/fdt.c
@@ -0,0 +1,128 @@
+/*
+ * Copyright 2016 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+#include <asm/io.h>
+#include <fsl_qe.h>	/* For struct qe_firmware */
+
+#ifdef CONFIG_SYS_DPAA_FMAN
+/**
+ * fdt_fixup_fman_firmware -- insert the Fman firmware into the device tree
+ *
+ * The binding for an Fman firmware node is documented in
+ * Documentation/powerpc/dts-bindings/fsl/dpaa/fman.txt.  This node contains
+ * the actual Fman firmware binary data.  The operating system is expected to
+ * be able to parse the binary data to determine any attributes it needs.
+ */
+void fdt_fixup_fman_firmware(void *blob)
+{
+	int rc, fmnode, fwnode = -1;
+	uint32_t phandle;
+	struct qe_firmware *fmanfw;
+	const struct qe_header *hdr;
+	unsigned int length;
+	uint32_t crc;
+	const char *p;
+
+	/* The first Fman we find will contain the actual firmware. */
+	fmnode = fdt_node_offset_by_compatible(blob, -1, "fsl,fman");
+	if (fmnode < 0)
+		/* Exit silently if there are no Fman devices */
+		return;
+
+	/* If we already have a firmware node, then also exit silently. */
+	if (fdt_node_offset_by_compatible(blob, -1, "fsl,fman-firmware") > 0)
+		return;
+
+	/* If the environment variable is not set, then exit silently */
+	p = getenv("fman_ucode");
+	if (!p)
+		return;
+
+	fmanfw = (struct qe_firmware *)simple_strtoul(p, NULL, 16);
+	if (!fmanfw)
+		return;
+
+	hdr = &fmanfw->header;
+	length = be32_to_cpu(hdr->length);
+
+	/* Verify the firmware. */
+	if ((hdr->magic[0] != 'Q') || (hdr->magic[1] != 'E') ||
+	    (hdr->magic[2] != 'F')) {
+		printf("Data at %p is not an Fman firmware\n", fmanfw);
+		return;
+	}
+
+	if (length > CONFIG_SYS_QE_FMAN_FW_LENGTH) {
+		printf("Fman firmware at %p is too large (size=%u)\n",
+		       fmanfw, length);
+		return;
+	}
+
+	length -= sizeof(u32);	/* Subtract the size of the CRC */
+	crc = be32_to_cpu(*(u32 *)((void *)fmanfw + length));
+	if (crc != crc32_no_comp(0, (void *)fmanfw, length)) {
+		printf("Fman firmware at %p has invalid CRC\n", fmanfw);
+		return;
+	}
+
+	/* Increase the size of the fdt to make room for the node. */
+	rc = fdt_increase_size(blob, fmanfw->header.length);
+	if (rc < 0) {
+		printf("Unable to make room for Fman firmware: %s\n",
+		       fdt_strerror(rc));
+		return;
+	}
+
+	/* Create the firmware node. */
+	fwnode = fdt_add_subnode(blob, fmnode, "fman-firmware");
+	if (fwnode < 0) {
+		char s[64];
+		fdt_get_path(blob, fmnode, s, sizeof(s));
+		printf("Could not add firmware node to %s: %s\n", s,
+		       fdt_strerror(fwnode));
+		return;
+	}
+	rc = fdt_setprop_string(blob, fwnode, "compatible",
+					"fsl,fman-firmware");
+	if (rc < 0) {
+		char s[64];
+		fdt_get_path(blob, fwnode, s, sizeof(s));
+		printf("Could not add compatible property to node %s: %s\n", s,
+		       fdt_strerror(rc));
+		return;
+	}
+	phandle = fdt_create_phandle(blob, fwnode);
+	if (!phandle) {
+		char s[64];
+		fdt_get_path(blob, fwnode, s, sizeof(s));
+		printf("Could not add phandle property to node %s: %s\n", s,
+		       fdt_strerror(rc));
+		return;
+	}
+	rc = fdt_setprop(blob, fwnode, "fsl,firmware", fmanfw,
+			 fmanfw->header.length);
+	if (rc < 0) {
+		char s[64];
+		fdt_get_path(blob, fwnode, s, sizeof(s));
+		printf("Could not add firmware property to node %s: %s\n", s,
+		       fdt_strerror(rc));
+		return;
+	}
+
+	/* Find all other Fman nodes and point them to the firmware node. */
+	while ((fmnode = fdt_node_offset_by_compatible(blob, fmnode,
+		"fsl,fman")) > 0) {
+		rc = fdt_setprop_cell(blob, fmnode, "fsl,firmware-phandle",
+				      phandle);
+		if (rc < 0) {
+			char s[64];
+			fdt_get_path(blob, fmnode, s, sizeof(s));
+			printf("Could not add pointer property to node %s: %s\n",
+			       s, fdt_strerror(rc));
+			return;
+		}
+	}
+}
+#endif