4  *	uclinux.c -- generic memory mapped MTD driver for uclinux
20 #include <linux/mtd/mtd.h>
21 #include <linux/mtd/map.h>
22 #include <linux/mtd/partitions.h>
31 #define MAP_NAME "ram"
39 static unsigned long physaddr = -1;
54 static int uclinux_point(struct mtd_info *mtd, loff_t from, size_t len,  in uclinux_point()  argument
57 	struct map_info *map = mtd->priv;  in uclinux_point()
58 	*virt = map->virt + from;  in uclinux_point()
60 		*phys = map->phys + from;  in uclinux_point()
69 	struct mtd_info *mtd;  in uclinux_mtd_init()  local
74 	if (physaddr == -1)  in uclinux_mtd_init()
75 		mapp->phys = (resource_size_t)__bss_stop;  in uclinux_mtd_init()
77 		mapp->phys = physaddr;  in uclinux_mtd_init()
79 	if (!mapp->size)  in uclinux_mtd_init()
80 		mapp->size = PAGE_ALIGN(ntohl(*((unsigned long *)(mapp->phys + 8))));  in uclinux_mtd_init()
81 	mapp->bankwidth = 4;  in uclinux_mtd_init()
83 	printk("uclinux[mtd]: probe address=0x%x size=0x%x\n",  in uclinux_mtd_init()
84 	       	(int) mapp->phys, (int) mapp->size);  in uclinux_mtd_init()
92 	mapp->virt = phys_to_virt(mapp->phys);  in uclinux_mtd_init()
94 	if (mapp->virt == 0) {  in uclinux_mtd_init()
95 		printk("uclinux[mtd]: no virtual mapping?\n");  in uclinux_mtd_init()
96 		return(-EIO);  in uclinux_mtd_init()
101 	mtd = do_map_probe("map_" MAP_NAME, mapp);  in uclinux_mtd_init()
102 	if (!mtd) {  in uclinux_mtd_init()
103 		printk("uclinux[mtd]: failed to find a mapping?\n");  in uclinux_mtd_init()
104 		return(-ENXIO);  in uclinux_mtd_init()
107 	mtd->owner = THIS_MODULE;  in uclinux_mtd_init()
108 	mtd->_point = uclinux_point;  in uclinux_mtd_init()
109 	mtd->priv = mapp;  in uclinux_mtd_init()
111 	uclinux_ram_mtdinfo = mtd;  in uclinux_mtd_init()
112 	mtd_device_register(mtd, uclinux_romfs, NUM_PARTITIONS);  in uclinux_mtd_init()