3fd0a4222b
1. Use upstream accepted NVMEM patches 2. Minor fix for BCM4908 partitioning 3. Support for Linksys firmware partitions on Northstar Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
157 lines
5.1 KiB
Diff
157 lines
5.1 KiB
Diff
From 7134a2d026d942210b4d26d6059c9d979ca7866e Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
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Date: Fri, 12 Mar 2021 14:49:19 +0100
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Subject: [PATCH] mtd: parsers: ofpart: support Linksys Northstar partitions
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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This allows extending ofpart parser with support for Linksys Northstar
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devices. That support uses recently added quirks mechanism.
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Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
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Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Link: https://lore.kernel.org/linux-mtd/20210312134919.7767-2-zajec5@gmail.com
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---
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drivers/mtd/parsers/Kconfig | 10 +++++
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drivers/mtd/parsers/Makefile | 1 +
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drivers/mtd/parsers/ofpart_core.c | 6 +++
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drivers/mtd/parsers/ofpart_linksys_ns.c | 50 +++++++++++++++++++++++++
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drivers/mtd/parsers/ofpart_linksys_ns.h | 18 +++++++++
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5 files changed, 85 insertions(+)
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create mode 100644 drivers/mtd/parsers/ofpart_linksys_ns.c
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create mode 100644 drivers/mtd/parsers/ofpart_linksys_ns.h
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--- a/drivers/mtd/parsers/Kconfig
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+++ b/drivers/mtd/parsers/Kconfig
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@@ -76,6 +76,16 @@ config MTD_OF_PARTS_BCM4908
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that can have multiple "firmware" partitions. It takes care of
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finding currently used one and backup ones.
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+config MTD_OF_PARTS_LINKSYS_NS
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+ bool "Linksys Northstar partitioning support"
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+ depends on MTD_OF_PARTS && (ARCH_BCM_5301X || ARCH_BCM4908 || COMPILE_TEST)
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+ default ARCH_BCM_5301X
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+ help
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+ This provides partitions parser for Linksys devices based on Broadcom
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+ Northstar architecture. Linksys commonly uses fixed flash layout with
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+ two "firmware" partitions. Currently used firmware has to be detected
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+ using CFE environment variable.
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+
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config MTD_PARSER_IMAGETAG
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tristate "Parser for BCM963XX Image Tag format partitions"
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depends on BCM63XX || BMIPS_GENERIC || COMPILE_TEST
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--- a/drivers/mtd/parsers/Makefile
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+++ b/drivers/mtd/parsers/Makefile
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@@ -6,6 +6,7 @@ obj-$(CONFIG_MTD_CMDLINE_PARTS) += cmdl
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obj-$(CONFIG_MTD_OF_PARTS) += ofpart.o
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ofpart-y += ofpart_core.o
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ofpart-$(CONFIG_MTD_OF_PARTS_BCM4908) += ofpart_bcm4908.o
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+ofpart-$(CONFIG_MTD_OF_PARTS_LINKSYS_NS)+= ofpart_linksys_ns.o
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obj-$(CONFIG_MTD_PARSER_IMAGETAG) += parser_imagetag.o
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obj-$(CONFIG_MTD_AFS_PARTS) += afs.o
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obj-$(CONFIG_MTD_PARSER_TRX) += parser_trx.o
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--- a/drivers/mtd/parsers/ofpart_core.c
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+++ b/drivers/mtd/parsers/ofpart_core.c
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@@ -17,6 +17,7 @@
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#include <linux/mtd/partitions.h>
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#include "ofpart_bcm4908.h"
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+#include "ofpart_linksys_ns.h"
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struct fixed_partitions_quirks {
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int (*post_parse)(struct mtd_info *mtd, struct mtd_partition *parts, int nr_parts);
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@@ -26,6 +27,10 @@ static struct fixed_partitions_quirks bc
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.post_parse = bcm4908_partitions_post_parse,
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};
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+static struct fixed_partitions_quirks linksys_ns_partitions_quirks = {
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+ .post_parse = linksys_ns_partitions_post_parse,
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+};
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+
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static const struct of_device_id parse_ofpart_match_table[];
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static bool node_has_compatible(struct device_node *pp)
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@@ -167,6 +172,7 @@ static const struct of_device_id parse_o
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{ .compatible = "fixed-partitions" },
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/* Customized */
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{ .compatible = "brcm,bcm4908-partitions", .data = &bcm4908_partitions_quirks, },
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+ { .compatible = "linksys,ns-partitions", .data = &linksys_ns_partitions_quirks, },
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{},
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};
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MODULE_DEVICE_TABLE(of, parse_ofpart_match_table);
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--- /dev/null
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+++ b/drivers/mtd/parsers/ofpart_linksys_ns.c
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@@ -0,0 +1,50 @@
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+// SPDX-License-Identifier: GPL-2.0
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+/*
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+ * Copyright (C) 2021 Rafał Miłecki <rafal@milecki.pl>
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+ */
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+
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+#include <linux/bcm47xx_nvram.h>
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+#include <linux/mtd/mtd.h>
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+#include <linux/mtd/partitions.h>
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+
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+#include "ofpart_linksys_ns.h"
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+
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+#define NVRAM_BOOT_PART "bootpartition"
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+
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+static int ofpart_linksys_ns_bootpartition(void)
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+{
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+ char buf[4];
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+ int bootpartition;
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+
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+ /* Check CFE environment variable */
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+ if (bcm47xx_nvram_getenv(NVRAM_BOOT_PART, buf, sizeof(buf)) > 0) {
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+ if (!kstrtoint(buf, 0, &bootpartition))
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+ return bootpartition;
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+ pr_warn("Failed to parse %s value \"%s\"\n", NVRAM_BOOT_PART,
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+ buf);
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+ } else {
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+ pr_warn("Failed to get NVRAM \"%s\"\n", NVRAM_BOOT_PART);
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+ }
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+
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+ return 0;
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+}
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+
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+int linksys_ns_partitions_post_parse(struct mtd_info *mtd,
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+ struct mtd_partition *parts,
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+ int nr_parts)
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+{
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+ int bootpartition = ofpart_linksys_ns_bootpartition();
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+ int trx_idx = 0;
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+ int i;
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+
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+ for (i = 0; i < nr_parts; i++) {
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+ if (of_device_is_compatible(parts[i].of_node, "linksys,ns-firmware")) {
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+ if (trx_idx++ == bootpartition)
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+ parts[i].name = "firmware";
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+ else
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+ parts[i].name = "backup";
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+ }
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+ }
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+
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+ return 0;
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+}
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--- /dev/null
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+++ b/drivers/mtd/parsers/ofpart_linksys_ns.h
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@@ -0,0 +1,18 @@
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+/* SPDX-License-Identifier: GPL-2.0 */
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+#ifndef __OFPART_LINKSYS_NS_H
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+#define __OFPART_LINKSYS_NS_H
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+
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+#ifdef CONFIG_MTD_OF_PARTS_LINKSYS_NS
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+int linksys_ns_partitions_post_parse(struct mtd_info *mtd,
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+ struct mtd_partition *parts,
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+ int nr_parts);
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+#else
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+static inline int linksys_ns_partitions_post_parse(struct mtd_info *mtd,
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+ struct mtd_partition *parts,
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+ int nr_parts)
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+{
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+ return -EOPNOTSUPP;
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+}
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+#endif
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+
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+#endif
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