aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/brcm63xx-2.6/patches/040-bcm963xx_flashmap.patch
blob: d8acdfa9a0b61ca5ca0d3bb329de0196326c1017 (plain)
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
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
diff -urN linux-2.6.16.7/drivers/mtd/maps/bcm963xx.c linux-2.6.16.7-brcm63xx/drivers/mtd/maps/bcm963xx.c
--- linux-2.6.16.7/drivers/mtd/maps/bcm963xx.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.16.7-brcm63xx/drivers/mtd/maps/bcm963xx.c	2006-07-07 22:00:36.000000000 +0200
@@ -0,0 +1,106 @@
+/*
+ * A simple flash mapping code for BCM963xx board flash memory
+ * It is simple because it only treats all the flash memory as ROM
+ * It is used with chips/map_rom.c
+ *
+ *  Song Wang (songw@broadcom.com)
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <asm/io.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/config.h>
+
+#include <board.h>
+#include <bcmTag.h>
+#define  VERSION	"1.0"
+
+extern PFILE_TAG kerSysImageTagGet(void);
+
+static struct mtd_info *mymtd;
+
+static map_word brcm_physmap_read16(struct map_info *map, unsigned long ofs)
+{
+	map_word val;
+	
+	val.x[0] = __raw_readw(map->map_priv_1 + ofs);
+	
+	return val;
+}
+
+static void brcm_physmap_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
+{
+	memcpy_fromio(to, map->map_priv_1 + from, len);
+}
+
+static struct map_info brcm_physmap_map = {
+	.name		= "Physically mapped flash",
+	.bankwidth	= 2,
+	.read		= brcm_physmap_read16,
+	.copy_from	= brcm_physmap_copy_from
+};
+
+static int __init init_brcm_physmap(void)
+{
+        PFILE_TAG pTag = NULL;
+        u_int32_t rootfs_addr, kernel_addr;
+        FLASH_ADDR_INFO info;
+
+	printk("bcm963xx_mtd driver v%s\n", VERSION);
+        kerSysFlashAddrInfoGet( &info );
+
+        /* Read the flash memory map from flash memory. */
+        if (!(pTag = kerSysImageTagGet())) {
+                printk("Failed to read image tag from flash\n");
+                return -EIO;
+        }
+
+        rootfs_addr = (u_int32_t) simple_strtoul(pTag->rootfsAddress, NULL, 10);
+        kernel_addr = (u_int32_t) simple_strtoul(pTag->kernelAddress, NULL, 10);
+	
+	brcm_physmap_map.size = kernel_addr - rootfs_addr;
+	brcm_physmap_map.map_priv_1 = (unsigned long)rootfs_addr;
+
+	if (!brcm_physmap_map.map_priv_1) {
+		printk("Wrong rootfs starting address\n");
+		return -EIO;
+	}
+	
+	if (brcm_physmap_map.size <= 0) {
+		printk("Wrong rootfs size\n");
+		return -EIO;
+	}	
+	
+	mymtd = do_map_probe("map_rom", &brcm_physmap_map);
+	if (mymtd) {
+		mymtd->owner = THIS_MODULE;
+		add_mtd_device(mymtd);
+
+		return 0;
+	}
+
+	return -ENXIO;
+}
+
+static void __exit cleanup_brcm_physmap(void)
+{
+	if (mymtd) {
+		del_mtd_device(mymtd);
+		map_destroy(mymtd);
+	}
+	if (brcm_physmap_map.map_priv_1) {
+		brcm_physmap_map.map_priv_1 = 0;
+	}
+}
+
+module_init(init_brcm_physmap);
+module_exit(cleanup_brcm_physmap);
+
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Song Wang songw@broadcom.com");
+MODULE_DESCRIPTION("Configurable MTD map driver for read-only root file system");
diff -urN linux-2.6.16.7/drivers/mtd/maps/Kconfig linux-2.6.16.7-brcm63xx/drivers/mtd/maps/Kconfig
--- linux-2.6.16.7/drivers/mtd/maps/Kconfig	2006-04-17 23:53:25.000000000 +0200
+++ linux-2.6.16.7-brcm63xx/drivers/mtd/maps/Kconfig	2006-07-07 22:02:13.000000000 +0200
@@ -224,6 +224,13 @@
 	  Flash memory access on 4G Systems MTX-1 Board. If you have one of
 	  these boards and would like to use the flash chips on it, say 'Y'.
 
+config MTD_BCM963XX
+	tristate "BCM963xx Flash device"
+	depends on MIPS && MIPS_BRCM
+	help
+	  This driver seems to detect and provide a valid flash map to the system
+	  of course, it needs checking and testing.
+
 config MTD_DILNETPC
 	tristate "CFI Flash device mapped on DIL/Net PC"
 	depends on X86 && MTD_CONCAT && MTD_PARTITIONS && MTD_CFI_INTELEXT
diff -urN linux-2.6.16.7/drivers/mtd/maps/Makefile linux-2.6.16.7-brcm63xx/drivers/mtd/maps/Makefile
--- linux-2.6.16.7/drivers/mtd/maps/Makefile	2006-04-17 23:53:25.000000000 +0200
+++ linux-2.6.16.7-brcm63xx/drivers/mtd/maps/Makefile	2006-07-07 22:01:29.000000000 +0200
@@ -71,3 +71,4 @@
 obj-$(CONFIG_MTD_OMAP_NOR)	+= omap_nor.o
 obj-$(CONFIG_MTD_MTX1)		+= mtx-1_flash.o
 obj-$(CONFIG_MTD_TQM834x)	+= tqm834x.o
+obj-$(CONFIG_MTD_BCM963XX)      += bcm963xx.o