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bcm53xx: update NVRAM driver to MIPS version from upstream-sfr

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Signed-off-by: Rafał Miłecki <zajec5@gmail.com>

SVN-Revision: 45943
This commit is contained in:
Rafał Miłecki 2015-06-10 20:34:32 +00:00
parent b273bb1896
commit 950c0191c2
1 changed files with 16 additions and 21 deletions
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35
target/linux/bcm53xx/files/drivers/firmware/broadcom/bcm47xx_nvram.c
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@ -35,6 +35,7 @@ struct nvram_header {
}; };
static char nvram_buf[NVRAM_SPACE]; static char nvram_buf[NVRAM_SPACE];
static size_t nvram_len;
static const u32 nvram_sizes[] = {0x8000, 0xF000, 0x10000}; static const u32 nvram_sizes[] = {0x8000, 0xF000, 0x10000};
static u32 find_nvram_size(void __iomem *end) static u32 find_nvram_size(void __iomem *end)
@ -60,7 +61,7 @@ static int nvram_find_and_copy(void __iomem *iobase, u32 lim)
u32 *src, *dst; u32 *src, *dst;
u32 size; u32 size;
if (nvram_buf[0]) { if (nvram_len) {
pr_warn("nvram already initialized\n"); pr_warn("nvram already initialized\n");
return -EEXIST; return -EEXIST;
} }
@ -99,17 +100,18 @@ found:
for (i = 0; i < sizeof(struct nvram_header); i += 4) for (i = 0; i < sizeof(struct nvram_header); i += 4)
*dst++ = __raw_readl(src++); *dst++ = __raw_readl(src++);
header = (struct nvram_header *)nvram_buf; header = (struct nvram_header *)nvram_buf;
if (header->len > size) { nvram_len = header->len;
if (nvram_len > size) {
pr_err("The nvram size according to the header seems to be bigger than the partition on flash\n"); pr_err("The nvram size according to the header seems to be bigger than the partition on flash\n");
header->len = size; nvram_len = size;
} }
if (header->len >= NVRAM_SPACE) { if (nvram_len >= NVRAM_SPACE) {
pr_err("nvram on flash (%i bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n", pr_err("nvram on flash (%i bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n",
header->len, NVRAM_SPACE - 1); header->len, NVRAM_SPACE - 1);
header->len = NVRAM_SPACE - 1; nvram_len = NVRAM_SPACE - 1;
} }
/* proceed reading data after header */ /* proceed reading data after header */
for (; i < header->len; i += 4) for (; i < nvram_len; i += 4)
*dst++ = readl(src++); *dst++ = readl(src++);
nvram_buf[NVRAM_SPACE - 1] = '\0'; nvram_buf[NVRAM_SPACE - 1] = '\0';
@ -144,7 +146,6 @@ static int nvram_init(void)
#ifdef CONFIG_MTD #ifdef CONFIG_MTD
struct mtd_info *mtd; struct mtd_info *mtd;
struct nvram_header header; struct nvram_header header;
struct nvram_header *pheader;
size_t bytes_read; size_t bytes_read;
int err; int err;
@ -155,20 +156,16 @@ static int nvram_init(void)
err = mtd_read(mtd, 0, sizeof(header), &bytes_read, (uint8_t *)&header); err = mtd_read(mtd, 0, sizeof(header), &bytes_read, (uint8_t *)&header);
if (!err && header.magic == NVRAM_MAGIC && if (!err && header.magic == NVRAM_MAGIC &&
header.len > sizeof(header)) { header.len > sizeof(header)) {
if (header.len >= NVRAM_SPACE) { nvram_len = header.len;
if (nvram_len >= NVRAM_SPACE) {
pr_err("nvram on flash (%i bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n", pr_err("nvram on flash (%i bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n",
header.len, NVRAM_SPACE); header.len, NVRAM_SPACE);
header.len = NVRAM_SPACE - 1; nvram_len = NVRAM_SPACE - 1;
} }
err = mtd_read(mtd, 0, header.len, &bytes_read, err = mtd_read(mtd, 0, nvram_len, &nvram_len,
(u8 *)nvram_buf); (u8 *)nvram_buf);
if (err)
return err; return err;
pheader = (struct nvram_header *)nvram_buf;
pheader->len = header.len;
return 0;
} }
#endif #endif
@ -183,7 +180,7 @@ int bcm47xx_nvram_getenv(const char *name, char *val, size_t val_len)
if (!name) if (!name)
return -EINVAL; return -EINVAL;
if (!nvram_buf[0]) { if (!nvram_len) {
err = nvram_init(); err = nvram_init();
if (err) if (err)
return err; return err;
@ -231,16 +228,14 @@ char *bcm47xx_nvram_get_contents(size_t *nvram_size)
{ {
int err; int err;
char *nvram; char *nvram;
struct nvram_header *header;
if (!nvram_buf[0]) { if (!nvram_len) {
err = nvram_init(); err = nvram_init();
if (err) if (err)
return NULL; return NULL;
} }
header = (struct nvram_header *)nvram_buf; *nvram_size = nvram_len - sizeof(struct nvram_header);
*nvram_size = header->len - sizeof(struct nvram_header);
nvram = vmalloc(*nvram_size); nvram = vmalloc(*nvram_size);
if (!nvram) if (!nvram)
return NULL; return NULL;