diff options
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.patch | 648 |
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"); |