mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-26 17:01:14 +00:00
946bfd59a6
Refactoring of bcm47xx_nvram driver. It's used by bcm47xx and bcm53xx.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit 1c48eee5b2)
81 lines
2.7 KiB
Diff
81 lines
2.7 KiB
Diff
From 298923cf999cecd2ef06df126f85a3d68da8c4d8 Mon Sep 17 00:00:00 2001
|
|
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
|
|
Date: Mon, 8 Mar 2021 10:03:18 +0100
|
|
Subject: [PATCH] firmware: bcm47xx_nvram: extract code copying NVRAM
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
This simplifies function finding NVRAM. It doesn't directly deal with
|
|
NVRAM structure anymore and is a bit smaller.
|
|
|
|
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
|
|
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
|
|
---
|
|
drivers/firmware/broadcom/bcm47xx_nvram.c | 43 +++++++++++++----------
|
|
1 file changed, 25 insertions(+), 18 deletions(-)
|
|
|
|
--- a/drivers/firmware/broadcom/bcm47xx_nvram.c
|
|
+++ b/drivers/firmware/broadcom/bcm47xx_nvram.c
|
|
@@ -55,11 +55,34 @@ static u32 find_nvram_size(void __iomem
|
|
}
|
|
|
|
/**
|
|
+ * bcm47xx_nvram_copy - copy NVRAM to internal buffer
|
|
+ */
|
|
+static void bcm47xx_nvram_copy(void __iomem *nvram_start, size_t res_size)
|
|
+{
|
|
+ struct nvram_header __iomem *header = nvram_start;
|
|
+ size_t copy_size;
|
|
+
|
|
+ copy_size = header->len;
|
|
+ if (copy_size > res_size) {
|
|
+ pr_err("The nvram size according to the header seems to be bigger than the partition on flash\n");
|
|
+ copy_size = res_size;
|
|
+ }
|
|
+ if (copy_size >= NVRAM_SPACE) {
|
|
+ pr_err("nvram on flash (%zu bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n",
|
|
+ copy_size, NVRAM_SPACE - 1);
|
|
+ copy_size = NVRAM_SPACE - 1;
|
|
+ }
|
|
+
|
|
+ __ioread32_copy(nvram_buf, nvram_start, DIV_ROUND_UP(copy_size, 4));
|
|
+ nvram_buf[NVRAM_SPACE - 1] = '\0';
|
|
+ nvram_len = copy_size;
|
|
+}
|
|
+
|
|
+/**
|
|
* bcm47xx_nvram_find_and_copy - find NVRAM on flash mapping & copy it
|
|
*/
|
|
static int bcm47xx_nvram_find_and_copy(void __iomem *flash_start, size_t res_size)
|
|
{
|
|
- struct nvram_header __iomem *header;
|
|
size_t flash_size;
|
|
size_t offset;
|
|
u32 size;
|
|
@@ -95,23 +118,7 @@ static int bcm47xx_nvram_find_and_copy(v
|
|
return -ENXIO;
|
|
|
|
found:
|
|
- header = (struct nvram_header *)(flash_start + offset);
|
|
- __ioread32_copy(nvram_buf, header, sizeof(*header) / 4);
|
|
- nvram_len = ((struct nvram_header *)(nvram_buf))->len;
|
|
- size = res_size - offset;
|
|
- if (nvram_len > size) {
|
|
- pr_err("The nvram size according to the header seems to be bigger than the partition on flash\n");
|
|
- nvram_len = size;
|
|
- }
|
|
- if (nvram_len >= NVRAM_SPACE) {
|
|
- pr_err("nvram on flash (%zu bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n",
|
|
- nvram_len, NVRAM_SPACE - 1);
|
|
- nvram_len = NVRAM_SPACE - 1;
|
|
- }
|
|
- /* proceed reading data after header */
|
|
- __ioread32_copy(nvram_buf + sizeof(*header), header + 1,
|
|
- DIV_ROUND_UP(nvram_len, 4));
|
|
- nvram_buf[NVRAM_SPACE - 1] = '\0';
|
|
+ bcm47xx_nvram_copy(flash_start + offset, res_size - offset);
|
|
|
|
return 0;
|
|
}
|