+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2023, Linaro Limited
+ */
+
+#define LOG_CATEGORY UCLASS_FWU_MDATA
+
+#include <fwu.h>
+#include <fwu_mdata.h>
+#include <memalign.h>
+
+#include <linux/errno.h>
+#include <linux/types.h>
+
+/* Internal helper structure to move data around */
+struct fwu_mdata_mtd_priv {
+ struct mtd_info *mtd;
+ char pri_label[50];
+ char sec_label[50];
+ u32 pri_offset;
+ u32 sec_offset;
+};
+
+enum fwu_mtd_op {
+ FWU_MTD_READ,
+ FWU_MTD_WRITE,
+};
+
+extern struct fwu_mtd_image_info fwu_mtd_images[];
+
+static bool mtd_is_aligned_with_block_size(struct mtd_info *mtd, u64 size)
+{
+ return !do_div(size, mtd->erasesize);
+}
+
+static int mtd_io_data(struct mtd_info *mtd, u32 offs, u32 size, void *data,
+ enum fwu_mtd_op op)
+{
+ struct mtd_oob_ops io_op = {};
+ u64 lock_len;
+ size_t len;
+ void *buf;
+ int ret;
+
+ if (!mtd_is_aligned_with_block_size(mtd, offs)) {
+ log_err("Offset unaligned with a block (0x%x)\n", mtd->erasesize);
+ return -EINVAL;
+ }
+
+ /* This will expand erase size to align with the block size */
+ lock_len = round_up(size, mtd->erasesize);
+
+ ret = mtd_unlock(mtd, offs, lock_len);
+ if (ret && ret != -EOPNOTSUPP)
+ return ret;
+
+ if (op == FWU_MTD_WRITE) {
+ struct erase_info erase_op = {};
+
+ erase_op.mtd = mtd;
+ erase_op.addr = offs;
+ erase_op.len = lock_len;
+ erase_op.scrub = 0;
+
+ ret = mtd_erase(mtd, &erase_op);
+ if (ret)
+ goto lock;
+ }
+
+ /* Also, expand the write size to align with the write size */
+ len = round_up(size, mtd->writesize);
+
+ buf = memalign(ARCH_DMA_MINALIGN, len);
+ if (!buf) {
+ ret = -ENOMEM;
+ goto lock;
+ }
+ memset(buf, 0xff, len);
+
+ io_op.mode = MTD_OPS_AUTO_OOB;
+ io_op.len = len;
+ io_op.datbuf = buf;
+
+ if (op == FWU_MTD_WRITE) {
+ memcpy(buf, data, size);
+ ret = mtd_write_oob(mtd, offs, &io_op);
+ } else {
+ ret = mtd_read_oob(mtd, offs, &io_op);
+ if (!ret)
+ memcpy(data, buf, size);
+ }
+ free(buf);
+
+lock:
+ mtd_lock(mtd, offs, lock_len);
+
+ return ret;
+}
+
+static int fwu_mtd_read_mdata(struct udevice *dev, struct fwu_mdata *mdata, bool primary)
+{
+ struct fwu_mdata_mtd_priv *mtd_priv = dev_get_priv(dev);
+ struct mtd_info *mtd = mtd_priv->mtd;
+ u32 offs = primary ? mtd_priv->pri_offset : mtd_priv->sec_offset;
+
+ return mtd_io_data(mtd, offs, sizeof(struct fwu_mdata), mdata, FWU_MTD_READ);
+}
+
+static int fwu_mtd_write_mdata(struct udevice *dev, struct fwu_mdata *mdata, bool primary)
+{
+ struct fwu_mdata_mtd_priv *mtd_priv = dev_get_priv(dev);
+ struct mtd_info *mtd = mtd_priv->mtd;
+ u32 offs = primary ? mtd_priv->pri_offset : mtd_priv->sec_offset;
+
+ return mtd_io_data(mtd, offs, sizeof(struct fwu_mdata), mdata, FWU_MTD_WRITE);
+}
+
+static int flash_partition_offset(struct udevice *dev, const char *part_name, fdt_addr_t *offset)
+{
+ ofnode node, parts_node;
+ fdt_addr_t size = 0;
+
+ parts_node = ofnode_by_compatible(dev_ofnode(dev), "fixed-partitions");
+ node = ofnode_by_prop_value(parts_node, "label", part_name, strlen(part_name) + 1);
+ if (!ofnode_valid(node)) {
+ log_err("Warning: Failed to find partition by label <%s>\n", part_name);
+ return -ENOENT;
+ }
+
+ *offset = ofnode_get_addr_size_index_notrans(node, 0, &size);
+
+ return (int)size;
+}
+
+static int fwu_mdata_mtd_of_to_plat(struct udevice *dev)
+{
+ struct fwu_mdata_mtd_priv *mtd_priv = dev_get_priv(dev);
+ const fdt32_t *phandle_p = NULL;
+ struct udevice *mtd_dev;
+ struct mtd_info *mtd;
+ const char *label;
+ fdt_addr_t offset;
+ int ret, size;
+ u32 phandle;
+ ofnode bank;
+ int off_img;
+
+ /* Find the FWU mdata storage device */
+ phandle_p = ofnode_get_property(dev_ofnode(dev),
+ "fwu-mdata-store", &size);
+ if (!phandle_p) {
+ log_err("FWU meta data store not defined in device-tree\n");
+ return -ENOENT;
+ }
+
+ phandle = fdt32_to_cpu(*phandle_p);
+
+ ret = device_get_global_by_ofnode(ofnode_get_by_phandle(phandle),
+ &mtd_dev);
+ if (ret) {
+ log_err("FWU: failed to get mtd device\n");
+ return ret;
+ }
+
+ mtd_probe_devices();
+
+ mtd_for_each_device(mtd) {
+ if (mtd->dev == mtd_dev) {
+ mtd_priv->mtd = mtd;
+ log_debug("Found the FWU mdata mtd device %s\n", mtd->name);
+ break;
+ }
+ }
+ if (!mtd_priv->mtd) {
+ log_err("Failed to find mtd device by fwu-mdata-store\n");
+ return -ENODEV;
+ }
+
+ /* Get the offset of primary and secondary mdata */
+ ret = ofnode_read_string_index(dev_ofnode(dev), "mdata-parts", 0, &label);
+ if (ret)
+ return ret;
+ strncpy(mtd_priv->pri_label, label, 50);
+
+ ret = flash_partition_offset(mtd_dev, mtd_priv->pri_label, &offset);
+ if (ret <= 0)
+ return ret;
+ mtd_priv->pri_offset = offset;
+
+ ret = ofnode_read_string_index(dev_ofnode(dev), "mdata-parts", 1, &label);
+ if (ret)
+ return ret;
+ strncpy(mtd_priv->sec_label, label, 50);
+
+ ret = flash_partition_offset(mtd_dev, mtd_priv->sec_label, &offset);
+ if (ret <= 0)
+ return ret;
+ mtd_priv->sec_offset = offset;
+
+ off_img = 0;
+
+ ofnode_for_each_subnode(bank, dev_ofnode(dev)) {
+ int bank_num, bank_offset, bank_size;
+ const char *bank_name;
+ ofnode image;
+
+ ofnode_read_u32(bank, "id", &bank_num);
+ bank_name = ofnode_read_string(bank, "label");
+ bank_size = flash_partition_offset(mtd_dev, bank_name, &offset);
+ if (bank_size <= 0)
+ return bank_size;
+ bank_offset = offset;
+ log_debug("Bank%d: %s [0x%x - 0x%x]\n",
+ bank_num, bank_name, bank_offset, bank_offset + bank_size);
+
+ ofnode_for_each_subnode(image, bank) {
+ int image_num, image_offset, image_size;
+ const char *uuid;
+
+ if (off_img == CONFIG_FWU_NUM_BANKS *
+ CONFIG_FWU_NUM_IMAGES_PER_BANK) {
+ log_err("DT provides more images than configured!\n");
+ break;
+ }
+
+ uuid = ofnode_read_string(image, "uuid");
+ ofnode_read_u32(image, "id", &image_num);
+ ofnode_read_u32(image, "offset", &image_offset);
+ ofnode_read_u32(image, "size", &image_size);
+
+ fwu_mtd_images[off_img].start = bank_offset + image_offset;
+ fwu_mtd_images[off_img].size = image_size;
+ fwu_mtd_images[off_img].bank_num = bank_num;
+ fwu_mtd_images[off_img].image_num = image_num;
+ strcpy(fwu_mtd_images[off_img].uuidbuf, uuid);
+ log_debug("\tImage%d: %s @0x%x\n\n",
+ image_num, uuid, bank_offset + image_offset);
+ off_img++;
+ }
+ }
+
+ return 0;
+}
+
+static int fwu_mdata_mtd_probe(struct udevice *dev)
+{
+ /* Ensure the metadata can be read. */
+ return fwu_get_mdata(NULL);
+}
+
+static struct fwu_mdata_ops fwu_mtd_ops = {
+ .read_mdata = fwu_mtd_read_mdata,
+ .write_mdata = fwu_mtd_write_mdata,
+};
+
+static const struct udevice_id fwu_mdata_ids[] = {
+ { .compatible = "u-boot,fwu-mdata-mtd" },
+ { }
+};
+
+U_BOOT_DRIVER(fwu_mdata_mtd) = {
+ .name = "fwu-mdata-mtd",
+ .id = UCLASS_FWU_MDATA,
+ .of_match = fwu_mdata_ids,
+ .ops = &fwu_mtd_ops,
+ .probe = fwu_mdata_mtd_probe,
+ .of_to_plat = fwu_mdata_mtd_of_to_plat,
+ .priv_auto = sizeof(struct fwu_mdata_mtd_priv),
+};
projects / platform / kernel / u-boot.git / commitdiff