1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
From 1d693b2c9d5943cbe938f879041b837cd004737f Mon Sep 17 00:00:00 2001
From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Sat, 23 Jul 2011 18:29:38 +0200
Subject: [PATCH 25/26] bcm47xx: read nvram from sflash
bcm47xx: add sflash support to nvram
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---
arch/mips/bcm47xx/nvram.c | 86 +++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 84 insertions(+), 2 deletions(-)
--- a/arch/mips/bcm47xx/nvram.c
+++ b/arch/mips/bcm47xx/nvram.c
@@ -20,11 +20,12 @@
#include <asm/addrspace.h>
#include <asm/mach-bcm47xx/nvram.h>
#include <asm/mach-bcm47xx/bcm47xx.h>
+#include <asm/mach-bcm47xx/bus.h>
static char nvram_buf[NVRAM_SPACE];
/* Probe for NVRAM header */
-static void early_nvram_init(void)
+static void early_nvram_init_pflash(void)
{
#ifdef CONFIG_BCM47XX_SSB
struct ssb_chipcommon *ssb_cc;
@@ -86,7 +87,88 @@ found:
for (i = 0; i < sizeof(struct nvram_header); i += 4)
*dst++ = *src++;
for (; i < header->len && i < NVRAM_SPACE; i += 4)
- *dst++ = le32_to_cpu(*src++);
+ *dst++ = *src++;
+}
+
+static int early_nvram_init_sflash(void)
+{
+ struct nvram_header header;
+ u32 off;
+ int ret;
+ char *dst;
+ int len;
+
+ /* check if the struct is already initilized */
+ if (!bcm47xx_sflash.size)
+ return -1;
+
+ off = FLASH_MIN;
+ while (off <= bcm47xx_sflash.size) {
+ ret = bcm47xx_sflash.read(&bcm47xx_sflash, off - NVRAM_SPACE, sizeof(header), (u8 *)&header);
+ if (ret != sizeof(header))
+ return ret;
+ if (header.magic == NVRAM_HEADER)
+ goto found;
+ off <<= 1;
+ }
+
+ off = FLASH_MIN;
+ while (off <= bcm47xx_sflash.size) {
+ ret = bcm47xx_sflash.read(&bcm47xx_sflash, off - (2 * NVRAM_SPACE), sizeof(header), (u8 *)&header);
+ if (ret != sizeof(header))
+ return ret;
+ if (header.magic == NVRAM_HEADER)
+ goto found;
+ off <<= 1;
+ }
+ return -1;
+
+found:
+ len = NVRAM_SPACE;
+ dst = nvram_buf;
+ while (len) {
+ ret = bcm47xx_sflash.read(&bcm47xx_sflash, off - (2 * NVRAM_SPACE), len, dst);
+ if (ret < 0)
+ return ret;
+ off += ret;
+ len -= ret;
+ dst += ret;
+ }
+ return 0;
+}
+
+static void early_nvram_init(void)
+{
+ int err = 0;
+
+ switch (bcm47xx_bus_type) {
+#ifdef CONFIG_BCM47XX_SSB
+ case BCM47XX_BUS_TYPE_SSB:
+ if (bcm47xx_bus.ssb.chipco.flash_type == SSB_PFLASH) {
+ early_nvram_init_pflash();
+ } else if (bcm47xx_bus.ssb.chipco.flash_type == SSB_SFLASH) {
+ err = early_nvram_init_sflash();
+ if (err < 0)
+ printk(KERN_WARNING "can not read from flash: %i\n", err);
+ } else {
+ printk(KERN_WARNING "unknow flash type\n");
+ }
+ break;
+#endif
+#ifdef CONFIG_BCM47XX_BCMA
+ case BCM47XX_BUS_TYPE_BCMA:
+ if (bcm47xx_bus.bcma.bus.drv_cc.flash_type == BCMA_PFLASH) {
+ early_nvram_init_pflash();
+ } else if (bcm47xx_bus.bcma.bus.drv_cc.flash_type == BCMA_SFLASH) {
+ err = early_nvram_init_sflash();
+ if (err < 0)
+ printk(KERN_WARNING "can not read from flash: %i\n", err);
+ } else {
+ printk(KERN_WARNING "unknow flash type\n");
+ }
+ break;
+#endif
+ }
}
int nvram_getenv(char *name, char *val, size_t val_len)
|
