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Diffstat (limited to 'target/linux/generic/backport-5.4/403-v5.13-mtd-parsers-ofpart-support-BCM4908-fixed-partitions.patch')
-rw-r--r--target/linux/generic/backport-5.4/403-v5.13-mtd-parsers-ofpart-support-BCM4908-fixed-partitions.patch648
1 files changed, 0 insertions, 648 deletions
diff --git a/target/linux/generic/backport-5.4/403-v5.13-mtd-parsers-ofpart-support-BCM4908-fixed-partitions.patch b/target/linux/generic/backport-5.4/403-v5.13-mtd-parsers-ofpart-support-BCM4908-fixed-partitions.patch
deleted file mode 100644
index 8f292bd177..0000000000
--- a/target/linux/generic/backport-5.4/403-v5.13-mtd-parsers-ofpart-support-BCM4908-fixed-partitions.patch
+++ /dev/null
@@ -1,648 +0,0 @@
-From afbef8efb591792579c633a7c545f914c6165f82 Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
-Date: Thu, 11 Feb 2021 23:04:27 +0100
-Subject: [PATCH] mtd: parsers: ofpart: support BCM4908 fixed partitions
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-Some devices use fixed partitioning with some partitions requiring some
-extra logic. E.g. BCM4908 may have multiple firmware partitions but
-detecting currently used one requires checking bootloader parameters.
-
-To support such cases without duplicating a lot of code (without copying
-most of the ofpart.c code) support for post-parsing callback was added.
-
-BCM4908 support in ofpart can be enabled using config option and results
-in compiling & executing a specific callback. It simply reads offset of
-currently used firmware partition from the DT. Bootloader specifies it
-using the "brcm_blparms" property.
-
-Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
----
- drivers/mtd/parsers/Kconfig | 9 +++
- drivers/mtd/parsers/Makefile | 2 +
- drivers/mtd/parsers/ofpart_bcm4908.c | 64 +++++++++++++++++++
- drivers/mtd/parsers/ofpart_bcm4908.h | 15 +++++
- .../mtd/parsers/{ofpart.c => ofpart_core.c} | 28 +++++++-
- 5 files changed, 116 insertions(+), 2 deletions(-)
- create mode 100644 drivers/mtd/parsers/ofpart_bcm4908.c
- create mode 100644 drivers/mtd/parsers/ofpart_bcm4908.h
- rename drivers/mtd/parsers/{ofpart.c => ofpart_core.c} (88%)
-
---- a/drivers/mtd/parsers/Kconfig
-+++ b/drivers/mtd/parsers/Kconfig
-@@ -67,6 +67,15 @@ config MTD_OF_PARTS
- flash memory node, as described in
- Documentation/devicetree/bindings/mtd/partition.txt.
-
-+config MTD_OF_PARTS_BCM4908
-+ bool "BCM4908 partitioning support"
-+ depends on MTD_OF_PARTS && (ARCH_BCM4908 || COMPILE_TEST)
-+ default ARCH_BCM4908
-+ help
-+ This provides partitions parser for BCM4908 family devices
-+ that can have multiple "firmware" partitions. It takes care of
-+ finding currently used one and backup ones.
-+
- config MTD_PARSER_IMAGETAG
- tristate "Parser for BCM963XX Image Tag format partitions"
- depends on BCM63XX || BMIPS_GENERIC || COMPILE_TEST
---- a/drivers/mtd/parsers/Makefile
-+++ b/drivers/mtd/parsers/Makefile
-@@ -4,6 +4,8 @@ obj-$(CONFIG_MTD_BCM47XX_PARTS) += bcm4
- obj-$(CONFIG_MTD_BCM63XX_PARTS) += bcm63xxpart.o
- obj-$(CONFIG_MTD_CMDLINE_PARTS) += cmdlinepart.o
- obj-$(CONFIG_MTD_OF_PARTS) += ofpart.o
-+ofpart-y += ofpart_core.o
-+ofpart-$(CONFIG_MTD_OF_PARTS_BCM4908) += ofpart_bcm4908.o
- obj-$(CONFIG_MTD_PARSER_IMAGETAG) += parser_imagetag.o
- obj-$(CONFIG_MTD_AFS_PARTS) += afs.o
- obj-$(CONFIG_MTD_PARSER_TRX) += parser_trx.o
---- /dev/null
-+++ b/drivers/mtd/parsers/ofpart_bcm4908.c
-@@ -0,0 +1,64 @@
-+// SPDX-License-Identifier: GPL-2.0
-+/*
-+ * Copyright (C) 2021 Rafał Miłecki <rafal@milecki.pl>
-+ */
-+
-+#include <linux/module.h>
-+#include <linux/init.h>
-+#include <linux/of.h>
-+#include <linux/mtd/mtd.h>
-+#include <linux/slab.h>
-+#include <linux/mtd/partitions.h>
-+
-+#include "ofpart_bcm4908.h"
-+
-+#define BLPARAMS_FW_OFFSET "NAND_RFS_OFS"
-+
-+static long long bcm4908_partitions_fw_offset(void)
-+{
-+ struct device_node *root;
-+ struct property *prop;
-+ const char *s;
-+
-+ root = of_find_node_by_path("/");
-+ if (!root)
-+ return -ENOENT;
-+
-+ of_property_for_each_string(root, "brcm_blparms", prop, s) {
-+ size_t len = strlen(BLPARAMS_FW_OFFSET);
-+ unsigned long offset;
-+ int err;
-+
-+ if (strncmp(s, BLPARAMS_FW_OFFSET, len) || s[len] != '=')
-+ continue;
-+
-+ err = kstrtoul(s + len + 1, 0, &offset);
-+ if (err) {
-+ pr_err("failed to parse %s\n", s + len + 1);
-+ return err;
-+ }
-+
-+ return offset << 10;
-+ }
-+
-+ return -ENOENT;
-+}
-+
-+int bcm4908_partitions_post_parse(struct mtd_info *mtd, struct mtd_partition *parts, int nr_parts)
-+{
-+ long long fw_offset;
-+ int i;
-+
-+ fw_offset = bcm4908_partitions_fw_offset();
-+
-+ for (i = 0; i < nr_parts; i++) {
-+ if (of_device_is_compatible(parts[i].of_node, "brcm,bcm4908-firmware")) {
-+ if (fw_offset < 0 || parts[i].offset == fw_offset)
-+ parts[i].name = "firmware";
-+ else
-+ parts[i].name = "backup";
-+ }
-+ }
-+
-+ return 0;
-+}
---- /dev/null
-+++ b/drivers/mtd/parsers/ofpart_bcm4908.h
-@@ -0,0 +1,15 @@
-+/* SPDX-License-Identifier: GPL-2.0 */
-+#ifndef __BCM4908_PARTITIONS_H
-+#define __BCM4908_PARTITIONS_H
-+
-+#ifdef CONFIG_MTD_OF_PARTS_BCM4908
-+int bcm4908_partitions_post_parse(struct mtd_info *mtd, struct mtd_partition *parts, int nr_parts);
-+#else
-+static inline int bcm4908_partitions_post_parse(struct mtd_info *mtd, struct mtd_partition *parts,
-+ int nr_parts)
-+{
-+ return -EOPNOTSUPP;
-+}
-+#endif
-+
-+#endif
---- a/drivers/mtd/parsers/ofpart.c
-+++ /dev/null
-@@ -1,236 +0,0 @@
--// SPDX-License-Identifier: GPL-2.0-or-later
--/*
-- * Flash partitions described by the OF (or flattened) device tree
-- *
-- * Copyright © 2006 MontaVista Software Inc.
-- * Author: Vitaly Wool <vwool@ru.mvista.com>
-- *
-- * Revised to handle newer style flash binding by:
-- * Copyright © 2007 David Gibson, IBM Corporation.
-- */
--
--#include <linux/module.h>
--#include <linux/init.h>
--#include <linux/of.h>
--#include <linux/mtd/mtd.h>
--#include <linux/slab.h>
--#include <linux/mtd/partitions.h>
--
--static bool node_has_compatible(struct device_node *pp)
--{
-- return of_get_property(pp, "compatible", NULL);
--}
--
--static int parse_fixed_partitions(struct mtd_info *master,
-- const struct mtd_partition **pparts,
-- struct mtd_part_parser_data *data)
--{
-- struct mtd_partition *parts;
-- struct device_node *mtd_node;
-- struct device_node *ofpart_node;
-- const char *partname;
-- struct device_node *pp;
-- int nr_parts, i, ret = 0;
-- bool dedicated = true;
--
--
-- /* Pull of_node from the master device node */
-- mtd_node = mtd_get_of_node(master);
-- if (!mtd_node)
-- return 0;
--
-- ofpart_node = of_get_child_by_name(mtd_node, "partitions");
-- if (!ofpart_node) {
-- /*
-- * We might get here even when ofpart isn't used at all (e.g.,
-- * when using another parser), so don't be louder than
-- * KERN_DEBUG
-- */
-- pr_debug("%s: 'partitions' subnode not found on %pOF. Trying to parse direct subnodes as partitions.\n",
-- master->name, mtd_node);
-- ofpart_node = mtd_node;
-- dedicated = false;
-- } else if (!of_device_is_compatible(ofpart_node, "fixed-partitions")) {
-- /* The 'partitions' subnode might be used by another parser */
-- return 0;
-- }
--
-- /* First count the subnodes */
-- nr_parts = 0;
-- for_each_child_of_node(ofpart_node, pp) {
-- if (!dedicated && node_has_compatible(pp))
-- continue;
--
-- nr_parts++;
-- }
--
-- if (nr_parts == 0)
-- return 0;
--
-- parts = kcalloc(nr_parts, sizeof(*parts), GFP_KERNEL);
-- if (!parts)
-- return -ENOMEM;
--
-- i = 0;
-- for_each_child_of_node(ofpart_node, pp) {
-- const __be32 *reg;
-- int len;
-- int a_cells, s_cells;
--
-- if (!dedicated && node_has_compatible(pp))
-- continue;
--
-- reg = of_get_property(pp, "reg", &len);
-- if (!reg) {
-- if (dedicated) {
-- pr_debug("%s: ofpart partition %pOF (%pOF) missing reg property.\n",
-- master->name, pp,
-- mtd_node);
-- goto ofpart_fail;
-- } else {
-- nr_parts--;
-- continue;
-- }
-- }
--
-- a_cells = of_n_addr_cells(pp);
-- s_cells = of_n_size_cells(pp);
-- if (len / 4 != a_cells + s_cells) {
-- pr_debug("%s: ofpart partition %pOF (%pOF) error parsing reg property.\n",
-- master->name, pp,
-- mtd_node);
-- goto ofpart_fail;
-- }
--
-- parts[i].offset = of_read_number(reg, a_cells);
-- parts[i].size = of_read_number(reg + a_cells, s_cells);
-- parts[i].of_node = pp;
--
-- partname = of_get_property(pp, "label", &len);
-- if (!partname)
-- partname = of_get_property(pp, "name", &len);
-- parts[i].name = partname;
--
-- if (of_get_property(pp, "read-only", &len))
-- parts[i].mask_flags |= MTD_WRITEABLE;
--
-- if (of_get_property(pp, "lock", &len))
-- parts[i].mask_flags |= MTD_POWERUP_LOCK;
--
-- i++;
-- }
--
-- if (!nr_parts)
-- goto ofpart_none;
--
-- *pparts = parts;
-- return nr_parts;
--
--ofpart_fail:
-- pr_err("%s: error parsing ofpart partition %pOF (%pOF)\n",
-- master->name, pp, mtd_node);
-- ret = -EINVAL;
--ofpart_none:
-- of_node_put(pp);
-- kfree(parts);
-- return ret;
--}
--
--static const struct of_device_id parse_ofpart_match_table[] = {
-- { .compatible = "fixed-partitions" },
-- {},
--};
--MODULE_DEVICE_TABLE(of, parse_ofpart_match_table);
--
--static struct mtd_part_parser ofpart_parser = {
-- .parse_fn = parse_fixed_partitions,
-- .name = "fixed-partitions",
-- .of_match_table = parse_ofpart_match_table,
--};
--
--static int parse_ofoldpart_partitions(struct mtd_info *master,
-- const struct mtd_partition **pparts,
-- struct mtd_part_parser_data *data)
--{
-- struct mtd_partition *parts;
-- struct device_node *dp;
-- int i, plen, nr_parts;
-- const struct {
-- __be32 offset, len;
-- } *part;
-- const char *names;
--
-- /* Pull of_node from the master device node */
-- dp = mtd_get_of_node(master);
-- if (!dp)
-- return 0;
--
-- part = of_get_property(dp, "partitions", &plen);
-- if (!part)
-- return 0; /* No partitions found */
--
-- pr_warn("Device tree uses obsolete partition map binding: %pOF\n", dp);
--
-- nr_parts = plen / sizeof(part[0]);
--
-- parts = kcalloc(nr_parts, sizeof(*parts), GFP_KERNEL);
-- if (!parts)
-- return -ENOMEM;
--
-- names = of_get_property(dp, "partition-names", &plen);
--
-- for (i = 0; i < nr_parts; i++) {
-- parts[i].offset = be32_to_cpu(part->offset);
-- parts[i].size = be32_to_cpu(part->len) & ~1;
-- /* bit 0 set signifies read only partition */
-- if (be32_to_cpu(part->len) & 1)
-- parts[i].mask_flags = MTD_WRITEABLE;
--
-- if (names && (plen > 0)) {
-- int len = strlen(names) + 1;
--
-- parts[i].name = names;
-- plen -= len;
-- names += len;
-- } else {
-- parts[i].name = "unnamed";
-- }
--
-- part++;
-- }
--
-- *pparts = parts;
-- return nr_parts;
--}
--
--static struct mtd_part_parser ofoldpart_parser = {
-- .parse_fn = parse_ofoldpart_partitions,
-- .name = "ofoldpart",
--};
--
--static int __init ofpart_parser_init(void)
--{
-- register_mtd_parser(&ofpart_parser);
-- register_mtd_parser(&ofoldpart_parser);
-- return 0;
--}
--
--static void __exit ofpart_parser_exit(void)
--{
-- deregister_mtd_parser(&ofpart_parser);
-- deregister_mtd_parser(&ofoldpart_parser);
--}
--
--module_init(ofpart_parser_init);
--module_exit(ofpart_parser_exit);
--
--MODULE_LICENSE("GPL");
--MODULE_DESCRIPTION("Parser for MTD partitioning information in device tree");
--MODULE_AUTHOR("Vitaly Wool, David Gibson");
--/*
-- * When MTD core cannot find the requested parser, it tries to load the module
-- * with the same name. Since we provide the ofoldpart parser, we should have
-- * the corresponding alias.
-- */
--MODULE_ALIAS("fixed-partitions");
--MODULE_ALIAS("ofoldpart");
---- /dev/null
-+++ b/drivers/mtd/parsers/ofpart_core.c
-@@ -0,0 +1,260 @@
-+// SPDX-License-Identifier: GPL-2.0-or-later
-+/*
-+ * Flash partitions described by the OF (or flattened) device tree
-+ *
-+ * Copyright © 2006 MontaVista Software Inc.
-+ * Author: Vitaly Wool <vwool@ru.mvista.com>
-+ *
-+ * Revised to handle newer style flash binding by:
-+ * Copyright © 2007 David Gibson, IBM Corporation.
-+ */
-+
-+#include <linux/module.h>
-+#include <linux/init.h>
-+#include <linux/of.h>
-+#include <linux/mtd/mtd.h>
-+#include <linux/slab.h>
-+#include <linux/mtd/partitions.h>
-+
-+#include "ofpart_bcm4908.h"
-+
-+struct fixed_partitions_quirks {
-+ int (*post_parse)(struct mtd_info *mtd, struct mtd_partition *parts, int nr_parts);
-+};
-+
-+struct fixed_partitions_quirks bcm4908_partitions_quirks = {
-+ .post_parse = bcm4908_partitions_post_parse,
-+};
-+
-+static const struct of_device_id parse_ofpart_match_table[];
-+
-+static bool node_has_compatible(struct device_node *pp)
-+{
-+ return of_get_property(pp, "compatible", NULL);
-+}
-+
-+static int parse_fixed_partitions(struct mtd_info *master,
-+ const struct mtd_partition **pparts,
-+ struct mtd_part_parser_data *data)
-+{
-+ const struct fixed_partitions_quirks *quirks;
-+ const struct of_device_id *of_id;
-+ struct mtd_partition *parts;
-+ struct device_node *mtd_node;
-+ struct device_node *ofpart_node;
-+ const char *partname;
-+ struct device_node *pp;
-+ int nr_parts, i, ret = 0;
-+ bool dedicated = true;
-+
-+ /* Pull of_node from the master device node */
-+ mtd_node = mtd_get_of_node(master);
-+ if (!mtd_node)
-+ return 0;
-+
-+ ofpart_node = of_get_child_by_name(mtd_node, "partitions");
-+ if (!ofpart_node) {
-+ /*
-+ * We might get here even when ofpart isn't used at all (e.g.,
-+ * when using another parser), so don't be louder than
-+ * KERN_DEBUG
-+ */
-+ pr_debug("%s: 'partitions' subnode not found on %pOF. Trying to parse direct subnodes as partitions.\n",
-+ master->name, mtd_node);
-+ ofpart_node = mtd_node;
-+ dedicated = false;
-+ }
-+
-+ of_id = of_match_node(parse_ofpart_match_table, ofpart_node);
-+ if (dedicated && !of_id) {
-+ /* The 'partitions' subnode might be used by another parser */
-+ return 0;
-+ }
-+
-+ quirks = of_id ? of_id->data : NULL;
-+
-+ /* First count the subnodes */
-+ nr_parts = 0;
-+ for_each_child_of_node(ofpart_node, pp) {
-+ if (!dedicated && node_has_compatible(pp))
-+ continue;
-+
-+ nr_parts++;
-+ }
-+
-+ if (nr_parts == 0)
-+ return 0;
-+
-+ parts = kcalloc(nr_parts, sizeof(*parts), GFP_KERNEL);
-+ if (!parts)
-+ return -ENOMEM;
-+
-+ i = 0;
-+ for_each_child_of_node(ofpart_node, pp) {
-+ const __be32 *reg;
-+ int len;
-+ int a_cells, s_cells;
-+
-+ if (!dedicated && node_has_compatible(pp))
-+ continue;
-+
-+ reg = of_get_property(pp, "reg", &len);
-+ if (!reg) {
-+ if (dedicated) {
-+ pr_debug("%s: ofpart partition %pOF (%pOF) missing reg property.\n",
-+ master->name, pp,
-+ mtd_node);
-+ goto ofpart_fail;
-+ } else {
-+ nr_parts--;
-+ continue;
-+ }
-+ }
-+
-+ a_cells = of_n_addr_cells(pp);
-+ s_cells = of_n_size_cells(pp);
-+ if (len / 4 != a_cells + s_cells) {
-+ pr_debug("%s: ofpart partition %pOF (%pOF) error parsing reg property.\n",
-+ master->name, pp,
-+ mtd_node);
-+ goto ofpart_fail;
-+ }
-+
-+ parts[i].offset = of_read_number(reg, a_cells);
-+ parts[i].size = of_read_number(reg + a_cells, s_cells);
-+ parts[i].of_node = pp;
-+
-+ partname = of_get_property(pp, "label", &len);
-+ if (!partname)
-+ partname = of_get_property(pp, "name", &len);
-+ parts[i].name = partname;
-+
-+ if (of_get_property(pp, "read-only", &len))
-+ parts[i].mask_flags |= MTD_WRITEABLE;
-+
-+ if (of_get_property(pp, "lock", &len))
-+ parts[i].mask_flags |= MTD_POWERUP_LOCK;
-+
-+ i++;
-+ }
-+
-+ if (!nr_parts)
-+ goto ofpart_none;
-+
-+ if (quirks && quirks->post_parse)
-+ quirks->post_parse(master, parts, nr_parts);
-+
-+ *pparts = parts;
-+ return nr_parts;
-+
-+ofpart_fail:
-+ pr_err("%s: error parsing ofpart partition %pOF (%pOF)\n",
-+ master->name, pp, mtd_node);
-+ ret = -EINVAL;
-+ofpart_none:
-+ of_node_put(pp);
-+ kfree(parts);
-+ return ret;
-+}
-+
-+static const struct of_device_id parse_ofpart_match_table[] = {
-+ /* Generic */
-+ { .compatible = "fixed-partitions" },
-+ /* Customized */
-+ { .compatible = "brcm,bcm4908-partitions", .data = &bcm4908_partitions_quirks, },
-+ {},
-+};
-+MODULE_DEVICE_TABLE(of, parse_ofpart_match_table);
-+
-+static struct mtd_part_parser ofpart_parser = {
-+ .parse_fn = parse_fixed_partitions,
-+ .name = "fixed-partitions",
-+ .of_match_table = parse_ofpart_match_table,
-+};
-+
-+static int parse_ofoldpart_partitions(struct mtd_info *master,
-+ const struct mtd_partition **pparts,
-+ struct mtd_part_parser_data *data)
-+{
-+ struct mtd_partition *parts;
-+ struct device_node *dp;
-+ int i, plen, nr_parts;
-+ const struct {
-+ __be32 offset, len;
-+ } *part;
-+ const char *names;
-+
-+ /* Pull of_node from the master device node */
-+ dp = mtd_get_of_node(master);
-+ if (!dp)
-+ return 0;
-+
-+ part = of_get_property(dp, "partitions", &plen);
-+ if (!part)
-+ return 0; /* No partitions found */
-+
-+ pr_warn("Device tree uses obsolete partition map binding: %pOF\n", dp);
-+
-+ nr_parts = plen / sizeof(part[0]);
-+
-+ parts = kcalloc(nr_parts, sizeof(*parts), GFP_KERNEL);
-+ if (!parts)
-+ return -ENOMEM;
-+
-+ names = of_get_property(dp, "partition-names", &plen);
-+
-+ for (i = 0; i < nr_parts; i++) {
-+ parts[i].offset = be32_to_cpu(part->offset);
-+ parts[i].size = be32_to_cpu(part->len) & ~1;
-+ /* bit 0 set signifies read only partition */
-+ if (be32_to_cpu(part->len) & 1)
-+ parts[i].mask_flags = MTD_WRITEABLE;
-+
-+ if (names && (plen > 0)) {
-+ int len = strlen(names) + 1;
-+
-+ parts[i].name = names;
-+ plen -= len;
-+ names += len;
-+ } else {
-+ parts[i].name = "unnamed";
-+ }
-+
-+ part++;
-+ }
-+
-+ *pparts = parts;
-+ return nr_parts;
-+}
-+
-+static struct mtd_part_parser ofoldpart_parser = {
-+ .parse_fn = parse_ofoldpart_partitions,
-+ .name = "ofoldpart",
-+};
-+
-+static int __init ofpart_parser_init(void)
-+{
-+ register_mtd_parser(&ofpart_parser);
-+ register_mtd_parser(&ofoldpart_parser);
-+ return 0;
-+}
-+
-+static void __exit ofpart_parser_exit(void)
-+{
-+ deregister_mtd_parser(&ofpart_parser);
-+ deregister_mtd_parser(&ofoldpart_parser);
-+}
-+
-+module_init(ofpart_parser_init);
-+module_exit(ofpart_parser_exit);
-+
-+MODULE_LICENSE("GPL");
-+MODULE_DESCRIPTION("Parser for MTD partitioning information in device tree");
-+MODULE_AUTHOR("Vitaly Wool, David Gibson");
-+/*
-+ * When MTD core cannot find the requested parser, it tries to load the module
-+ * with the same name. Since we provide the ofoldpart parser, we should have
-+ * the corresponding alias.
-+ */
-+MODULE_ALIAS("fixed-partitions");
-+MODULE_ALIAS("ofoldpart");