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4e57b68178
I recently picked up my older work to remove unnecessary #includes of sched.h, starting from a patch by Dave Jones to not include sched.h from module.h. This reduces the number of indirect includes of sched.h by ~300. Another ~400 pointless direct includes can be removed after this disentangling (patch to follow later). However, quite a few indirect includes need to be fixed up for this. In order to feed the patches through -mm with as little disturbance as possible, I've split out the fixes I accumulated up to now (complete for i386 and x86_64, more archs to follow later) and post them before the real patch. This way this large part of the patch is kept simple with only adding #includes, and all hunks are independent of each other. So if any hunk rejects or gets in the way of other patches, just drop it. My scripts will pick it up again in the next round. Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
352 lines
7.5 KiB
C
352 lines
7.5 KiB
C
/*
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* Ceiva flash memory driver.
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* Copyright (C) 2002 Rob Scott <rscott@mtrob.fdns.net>
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*
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* Note: this driver supports jedec compatible devices. Modification
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* for CFI compatible devices should be straight forward: change
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* jedec_probe to cfi_probe.
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*
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* Based on: sa1100-flash.c, which has the following copyright:
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* Flash memory access on SA11x0 based devices
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*
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* (C) 2000 Nicolas Pitre <nico@cam.org>
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*
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* $Id: ceiva.c,v 1.11 2004/09/16 23:27:12 gleixner Exp $
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/ioport.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/slab.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 <linux/mtd/concat.h>
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#include <asm/hardware.h>
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#include <asm/mach-types.h>
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#include <asm/io.h>
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#include <asm/sizes.h>
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/*
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* This isn't complete yet, so...
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*/
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#define CONFIG_MTD_CEIVA_STATICMAP
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#ifdef CONFIG_MTD_CEIVA_STATICMAP
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/*
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* See include/linux/mtd/partitions.h for definition of the mtd_partition
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* structure.
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*
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* Please note:
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* 1. The flash size given should be the largest flash size that can
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* be accomodated.
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*
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* 2. The bus width must defined in clps_setup_flash.
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*
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* The MTD layer will detect flash chip aliasing and reduce the size of
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* the map accordingly.
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*
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*/
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#ifdef CONFIG_ARCH_CEIVA
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/* Flash / Partition sizing */
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/* For the 28F8003, we use the block mapping to calcuate the sizes */
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#define MAX_SIZE_KiB (16 + 8 + 8 + 96 + (7*128))
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#define BOOT_PARTITION_SIZE_KiB (16)
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#define PARAMS_PARTITION_SIZE_KiB (8)
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#define KERNEL_PARTITION_SIZE_KiB (4*128)
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/* Use both remaing portion of first flash, and all of second flash */
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#define ROOT_PARTITION_SIZE_KiB (3*128) + (8*128)
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static struct mtd_partition ceiva_partitions[] = {
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{
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.name = "Ceiva BOOT partition",
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.size = BOOT_PARTITION_SIZE_KiB*1024,
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.offset = 0,
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},{
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.name = "Ceiva parameters partition",
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.size = PARAMS_PARTITION_SIZE_KiB*1024,
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.offset = (16 + 8) * 1024,
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},{
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.name = "Ceiva kernel partition",
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.size = (KERNEL_PARTITION_SIZE_KiB)*1024,
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.offset = 0x20000,
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},{
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.name = "Ceiva root filesystem partition",
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.offset = MTDPART_OFS_APPEND,
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.size = (ROOT_PARTITION_SIZE_KiB)*1024,
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}
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};
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#endif
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static int __init clps_static_partitions(struct mtd_partition **parts)
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{
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int nb_parts = 0;
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#ifdef CONFIG_ARCH_CEIVA
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if (machine_is_ceiva()) {
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*parts = ceiva_partitions;
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nb_parts = ARRAY_SIZE(ceiva_partitions);
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}
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#endif
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return nb_parts;
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}
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#endif
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struct clps_info {
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unsigned long base;
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unsigned long size;
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int width;
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void *vbase;
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struct map_info *map;
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struct mtd_info *mtd;
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struct resource *res;
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};
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#define NR_SUBMTD 4
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static struct clps_info info[NR_SUBMTD];
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static int __init clps_setup_mtd(struct clps_info *clps, int nr, struct mtd_info **rmtd)
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{
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struct mtd_info *subdev[nr];
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struct map_info *maps;
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int i, found = 0, ret = 0;
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/*
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* Allocate the map_info structs in one go.
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*/
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maps = kmalloc(sizeof(struct map_info) * nr, GFP_KERNEL);
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if (!maps)
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return -ENOMEM;
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memset(maps, 0, sizeof(struct map_info) * nr);
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/*
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* Claim and then map the memory regions.
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*/
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for (i = 0; i < nr; i++) {
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if (clps[i].base == (unsigned long)-1)
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break;
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clps[i].res = request_mem_region(clps[i].base, clps[i].size, "clps flash");
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if (!clps[i].res) {
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ret = -EBUSY;
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break;
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}
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clps[i].map = maps + i;
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clps[i].map->name = "clps flash";
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clps[i].map->phys = clps[i].base;
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clps[i].vbase = ioremap(clps[i].base, clps[i].size);
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if (!clps[i].vbase) {
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ret = -ENOMEM;
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break;
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}
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clps[i].map->virt = (void __iomem *)clps[i].vbase;
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clps[i].map->bankwidth = clps[i].width;
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clps[i].map->size = clps[i].size;
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simple_map_init(&clps[i].map);
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clps[i].mtd = do_map_probe("jedec_probe", clps[i].map);
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if (clps[i].mtd == NULL) {
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ret = -ENXIO;
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break;
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}
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clps[i].mtd->owner = THIS_MODULE;
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subdev[i] = clps[i].mtd;
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printk(KERN_INFO "clps flash: JEDEC device at 0x%08lx, %dMiB, "
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"%d-bit\n", clps[i].base, clps[i].mtd->size >> 20,
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clps[i].width * 8);
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found += 1;
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}
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/*
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* ENXIO is special. It means we didn't find a chip when
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* we probed. We need to tear down the mapping, free the
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* resource and mark it as such.
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*/
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if (ret == -ENXIO) {
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iounmap(clps[i].vbase);
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clps[i].vbase = NULL;
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release_resource(clps[i].res);
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clps[i].res = NULL;
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}
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/*
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* If we found one device, don't bother with concat support.
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* If we found multiple devices, use concat if we have it
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* available, otherwise fail.
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*/
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if (ret == 0 || ret == -ENXIO) {
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if (found == 1) {
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*rmtd = subdev[0];
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ret = 0;
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} else if (found > 1) {
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/*
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* We detected multiple devices. Concatenate
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* them together.
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*/
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#ifdef CONFIG_MTD_CONCAT
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*rmtd = mtd_concat_create(subdev, found,
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"clps flash");
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if (*rmtd == NULL)
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ret = -ENXIO;
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#else
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printk(KERN_ERR "clps flash: multiple devices "
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"found but MTD concat support disabled.\n");
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ret = -ENXIO;
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#endif
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}
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}
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/*
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* If we failed, clean up.
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*/
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if (ret) {
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do {
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if (clps[i].mtd)
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map_destroy(clps[i].mtd);
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if (clps[i].vbase)
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iounmap(clps[i].vbase);
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if (clps[i].res)
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release_resource(clps[i].res);
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} while (i--);
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kfree(maps);
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}
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return ret;
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}
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static void __exit clps_destroy_mtd(struct clps_info *clps, struct mtd_info *mtd)
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{
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int i;
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del_mtd_partitions(mtd);
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if (mtd != clps[0].mtd)
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mtd_concat_destroy(mtd);
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for (i = NR_SUBMTD; i >= 0; i--) {
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if (clps[i].mtd)
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map_destroy(clps[i].mtd);
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if (clps[i].vbase)
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iounmap(clps[i].vbase);
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if (clps[i].res)
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release_resource(clps[i].res);
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}
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kfree(clps[0].map);
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}
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/*
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* We define the memory space, size, and width for the flash memory
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* space here.
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*/
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static int __init clps_setup_flash(void)
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{
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int nr;
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#ifdef CONFIG_ARCH_CEIVA
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if (machine_is_ceiva()) {
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info[0].base = CS0_PHYS_BASE;
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info[0].size = SZ_32M;
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info[0].width = CEIVA_FLASH_WIDTH;
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info[1].base = CS1_PHYS_BASE;
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info[1].size = SZ_32M;
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info[1].width = CEIVA_FLASH_WIDTH;
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nr = 2;
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}
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#endif
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return nr;
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}
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static struct mtd_partition *parsed_parts;
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static const char *probes[] = { "cmdlinepart", "RedBoot", NULL };
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static void __init clps_locate_partitions(struct mtd_info *mtd)
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{
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const char *part_type = NULL;
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int nr_parts = 0;
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do {
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/*
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* Partition selection stuff.
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*/
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nr_parts = parse_mtd_partitions(mtd, probes, &parsed_parts, 0);
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if (nr_parts > 0) {
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part_type = "command line";
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break;
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}
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#ifdef CONFIG_MTD_CEIVA_STATICMAP
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nr_parts = clps_static_partitions(&parsed_parts);
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if (nr_parts > 0) {
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part_type = "static";
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break;
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}
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printk("found: %d partitions\n", nr_parts);
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#endif
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} while (0);
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if (nr_parts == 0) {
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printk(KERN_NOTICE "clps flash: no partition info "
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"available, registering whole flash\n");
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add_mtd_device(mtd);
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} else {
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printk(KERN_NOTICE "clps flash: using %s partition "
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"definition\n", part_type);
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add_mtd_partitions(mtd, parsed_parts, nr_parts);
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}
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/* Always succeeds. */
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}
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static void __exit clps_destroy_partitions(void)
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{
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if (parsed_parts)
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kfree(parsed_parts);
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}
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static struct mtd_info *mymtd;
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static int __init clps_mtd_init(void)
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{
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int ret;
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int nr;
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nr = clps_setup_flash();
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if (nr < 0)
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return nr;
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ret = clps_setup_mtd(info, nr, &mymtd);
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if (ret)
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return ret;
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clps_locate_partitions(mymtd);
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return 0;
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}
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static void __exit clps_mtd_cleanup(void)
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{
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clps_destroy_mtd(info, mymtd);
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clps_destroy_partitions();
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}
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module_init(clps_mtd_init);
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module_exit(clps_mtd_cleanup);
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MODULE_AUTHOR("Rob Scott");
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MODULE_DESCRIPTION("Cirrus Logic JEDEC map driver");
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MODULE_LICENSE("GPL");
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