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diff -Nurb linux/drivers/mtd/mtdcore.c linux-mtd-rw/drivers/mtd/mtdcore.c
--- linux/drivers/mtd/mtdcore.c 2004-11-18 13:16:00.000000000 +0100
+++ linux-mtd-rw/drivers/mtd/mtdcore.c 2004-11-18 15:27:13.130036616 +0100
@@ -25,6 +25,10 @@
#include <linux/mtd/mtd.h>
+/* this symbol is exported by the procfs. */
+extern struct proc_dir_entry *proc_sys_root;
+
+
/* These are exported solely for the purpose of mtd_blkdevs.c. You
should not use them for _anything_ else */
DECLARE_MUTEX(mtd_table_mutex);
@@ -336,8 +340,83 @@
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
static struct proc_dir_entry *proc_mtd;
+
+static struct proc_dir_entry *proc_sys_mtd;
+static struct proc_dir_entry *proc_sys_mtd_partition[MAX_MTD_DEVICES];
+static struct proc_dir_entry *proc_sys_mtd_partition_rw[MAX_MTD_DEVICES];
#endif
+/*===================================0
+ * mtdproc_read_partition_access
+ */
+static int mtdproc_read_partition_access ( char *page, char **start, off_t off,int count,
+ int *eof, void *data
+ )
+{
+ int partid = (unsigned int)data;
+ int len = 0;
+
+ // NO RETURN FROM HERE UNTIL "up(&mtd_table_mutex)".
+ down(&mtd_table_mutex);
+
+ if (partid < MAX_MTD_DEVICES)
+ {
+ struct mtd_info *this = mtd_table[partid];
+ if (this)
+ {
+ page[len] = (this->flags & MTD_WRITEABLE) ? '1' : '0';
+ len++;
+ }
+ }
+
+ up(&mtd_table_mutex);
+
+ if (off >= len)
+ return 0;
+ *start = page + off;
+ return ((count < len-off) ? count : len-off);
+}
+
+
+static int mtdproc_write_partition_access (struct file *file, const char *buffer,
+ unsigned long count, void *data)
+{
+ int partid = (unsigned int)data;
+ int len = 0;
+
+ // NO RETURN FROM HERE UNTIL "up(&mtd_table_mutex)".
+ down(&mtd_table_mutex);
+
+ if (partid < MAX_MTD_DEVICES)
+ {
+ struct mtd_info *this = mtd_table[partid];
+ if (this && count > 0)
+ {
+ switch (*buffer)
+ {
+ case '0':
+ this->flags &= ~(this->master_flags & MTD_WRITEABLE);
+ break;
+
+ case '1':
+ this->flags |= ~(this->master_flags & MTD_WRITEABLE);
+ break;
+
+ default:
+ break;
+ }
+ }
+ }
+
+ up(&mtd_table_mutex);
+
+ return count;
+}
+
+
+
+
+
static inline int mtd_proc_info (char *buf, int i)
{
struct mtd_info *this = mtd_table[i];
@@ -349,6 +428,7 @@
this->erasesize, this->name);
}
+
static int mtd_read_proc ( char *page, char **start, off_t off,int count
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
,int *eof, void *data_unused
@@ -404,12 +484,31 @@
/*====================================================================*/
/* Init code */
+
int __init init_mtd(void)
{
#ifdef CONFIG_PROC_FS
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
+ int i;
+
if ((proc_mtd = create_proc_entry( "mtd", 0, 0 )))
proc_mtd->read_proc = mtd_read_proc;
+
+ proc_sys_mtd = proc_mkdir("mtd", proc_sys_root);
+ for (i=0; i<MAX_MTD_DEVICES; i++)
+ {
+ char partname[10];
+ sprintf (partname, "%d", i);
+
+ proc_sys_mtd_partition[i] = proc_mkdir(partname, proc_sys_mtd);
+ proc_sys_mtd_partition_rw[i] = create_proc_entry ("rw", S_IFREG | S_IRUGO, proc_sys_mtd_partition[i]);
+ if (proc_sys_mtd_partition_rw[i])
+ {
+ proc_sys_mtd_partition_rw[i]->read_proc = mtdproc_read_partition_access;
+ proc_sys_mtd_partition_rw[i]->write_proc = mtdproc_write_partition_access;
+ proc_sys_mtd_partition_rw[i]->data = (void *)i;
+ }
+ }
#else
proc_register_dynamic(&proc_root,&mtd_proc_entry);
#endif
@@ -425,6 +524,8 @@
return 0;
}
+
+
static void __exit cleanup_mtd(void)
{
#ifdef CONFIG_PM
diff -Nurb linux/drivers/mtd/mtdpart.c linux-mtd-rw/drivers/mtd/mtdpart.c
--- linux/drivers/mtd/mtdpart.c 2004-11-18 13:16:00.000000000 +0100
+++ linux-mtd-rw/drivers/mtd/mtdpart.c 2004-11-18 15:27:13.131036464 +0100
@@ -341,6 +341,9 @@
/* set up the MTD object for this partition */
slave->mtd.type = master->type;
slave->mtd.flags = master->flags & ~parts[i].mask_flags;
+ slave->mtd.master_flags = master->flags;
+ slave->mtd.mask_flags = parts[i].mask_flags;
+
slave->mtd.size = parts[i].size;
slave->mtd.oobblock = master->oobblock;
slave->mtd.oobsize = master->oobsize;
diff -Nurb linux/include/linux/mtd/mtd.h linux-mtd-rw/include/linux/mtd/mtd.h
--- linux/include/linux/mtd/mtd.h 2004-11-18 13:16:31.000000000 +0100
+++ linux-mtd-rw/include/linux/mtd/mtd.h 2004-11-18 15:27:13.000000000 +0100
@@ -232,6 +232,9 @@
struct module *owner;
int usecount;
+
+ u_int32_t master_flags;
+ u_int32_t mask_flags;
};
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