9ee08c2df4
* git://git.infradead.org/mtd-2.6: (57 commits) [MTD] [NAND] subpage read feature as a way to increase performance. CPUFREQ: S3C24XX NAND driver frequency scaling support. [MTD][NAND] au1550nd: remove unused variable [MTD] jedec_probe: Fix SST 16-bit chip detection [MTD][MTDPART] Fix a division by zero bug [MTD][MTDPART] Cleanup and document the erase region handling [MTD][MTDPART] Handle most checkpatch findings [MTD][MTDPART] Seperate main loop from per-partition code in add_mtd_partition [MTD] physmap: resume already suspended chips on failure to suspend [MTD] physmap: Fix suspend/resume/shutdown bugs. [MTD] [NOR] Fix -ETIMEO errors in CFI driver [MTD] [NAND] fsl_elbc_nand: fix section mismatch with CONFIG_MTD_OF_PARTS=y [JFFS2] Use .unlocked_ioctl [MTD] Fix const assignment in the MTD command line partitioning driver [MTD] [NOR] gen_probe: No debug message when debugging is disabled [MTD] [NAND] remove __PPC__ hardcoded address from DiskOnChip drivers [MTD] [MAPS] Remove the bast-flash driver. [MTD] [NAND] fsl_elbc_nand: ecclayout cleanups [MTD] [NAND] fsl_elbc_nand: implement support for flash-based BBT [MTD] [NAND] fsl_elbc_nand: fix OOB workability for large page NAND chips ...
120 lines
2.9 KiB
C
120 lines
2.9 KiB
C
/****************************************************************************/
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/*
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* uclinux.c -- generic memory mapped MTD driver for uclinux
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*
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* (C) Copyright 2002, Greg Ungerer (gerg@snapgear.com)
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*/
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/****************************************************************************/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/fs.h>
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#include <linux/mm.h>
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#include <linux/major.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/map.h>
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#include <linux/mtd/partitions.h>
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#include <asm/io.h>
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/****************************************************************************/
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struct map_info uclinux_ram_map = {
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.name = "RAM",
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};
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struct mtd_info *uclinux_ram_mtdinfo;
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/****************************************************************************/
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struct mtd_partition uclinux_romfs[] = {
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{ .name = "ROMfs" }
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};
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#define NUM_PARTITIONS ARRAY_SIZE(uclinux_romfs)
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/****************************************************************************/
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int uclinux_point(struct mtd_info *mtd, loff_t from, size_t len,
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size_t *retlen, void **virt, resource_size_t *phys)
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{
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struct map_info *map = mtd->priv;
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*virt = map->virt + from;
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if (phys)
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*phys = map->phys + from;
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*retlen = len;
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return(0);
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}
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/****************************************************************************/
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int __init uclinux_mtd_init(void)
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{
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struct mtd_info *mtd;
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struct map_info *mapp;
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extern char _ebss;
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unsigned long addr = (unsigned long) &_ebss;
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mapp = &uclinux_ram_map;
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mapp->phys = addr;
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mapp->size = PAGE_ALIGN(ntohl(*((unsigned long *)(addr + 8))));
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mapp->bankwidth = 4;
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printk("uclinux[mtd]: RAM probe address=0x%x size=0x%x\n",
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(int) mapp->phys, (int) mapp->size);
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mapp->virt = ioremap_nocache(mapp->phys, mapp->size);
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if (mapp->virt == 0) {
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printk("uclinux[mtd]: ioremap_nocache() failed\n");
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return(-EIO);
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}
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simple_map_init(mapp);
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mtd = do_map_probe("map_ram", mapp);
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if (!mtd) {
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printk("uclinux[mtd]: failed to find a mapping?\n");
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iounmap(mapp->virt);
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return(-ENXIO);
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}
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mtd->owner = THIS_MODULE;
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mtd->point = uclinux_point;
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mtd->priv = mapp;
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uclinux_ram_mtdinfo = mtd;
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add_mtd_partitions(mtd, uclinux_romfs, NUM_PARTITIONS);
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return(0);
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}
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/****************************************************************************/
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void __exit uclinux_mtd_cleanup(void)
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{
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if (uclinux_ram_mtdinfo) {
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del_mtd_partitions(uclinux_ram_mtdinfo);
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map_destroy(uclinux_ram_mtdinfo);
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uclinux_ram_mtdinfo = NULL;
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}
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if (uclinux_ram_map.virt) {
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iounmap((void *) uclinux_ram_map.virt);
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uclinux_ram_map.virt = 0;
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}
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}
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/****************************************************************************/
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module_init(uclinux_mtd_init);
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module_exit(uclinux_mtd_cleanup);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Greg Ungerer <gerg@snapgear.com>");
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MODULE_DESCRIPTION("Generic RAM based MTD for uClinux");
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/****************************************************************************/
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