1 files changed, 0 insertions, 365 deletions
diff --git a/target/linux/olpc/files-2.6.23/drivers/mtd/mtdoops.c b/target/linux/olpc/files-2.6.23/drivers/mtd/mtdoops.c
deleted file mode 100644
index cfc28ab4a3..0000000000
--- a/target/linux/olpc/files-2.6.23/drivers/mtd/mtdoops.c
+++ /dev/null
@@ -1,365 +0,0 @@
-/*
- * MTD Oops/Panic logger
- *
- * Copyright (C) 2007 Nokia Corporation. All rights reserved.
- *
- * Author: Richard Purdie <rpurdie@openedhand.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/console.h>
-#include <linux/vmalloc.h>
-#include <linux/workqueue.h>
-#include <linux/sched.h>
-#include <linux/wait.h>
-#include <linux/mtd/mtd.h>
-
-#define OOPS_PAGE_SIZE 4096
-
-static struct mtdoops_context {
-	int mtd_index;
-	struct work_struct work;
-	struct mtd_info *mtd;
-	int oops_pages;
-	int nextpage;
-	int nextcount;
-
-	void *oops_buf;
-	int ready;
-	int writecount;
-} oops_cxt;
-
-static void mtdoops_erase_callback(struct erase_info *done)
-{
-	wait_queue_head_t *wait_q = (wait_queue_head_t *)done->priv;
-	wake_up(wait_q);
-}
-
-static int mtdoops_erase_block(struct mtd_info *mtd, int offset)
-{
-	struct erase_info erase;
-	DECLARE_WAITQUEUE(wait, current);
-	wait_queue_head_t wait_q;
-	int ret;
-
-	init_waitqueue_head(&wait_q);
-	erase.mtd = mtd;
-	erase.callback = mtdoops_erase_callback;
-	erase.addr = offset;
-	if (mtd->erasesize < OOPS_PAGE_SIZE)
-		erase.len = OOPS_PAGE_SIZE;
-	else
-		erase.len = mtd->erasesize;
-	erase.priv = (u_long)&wait_q;
-
-	set_current_state(TASK_INTERRUPTIBLE);
-	add_wait_queue(&wait_q, &wait);
-
-	ret = mtd->erase(mtd, &erase);
-	if (ret) {
-		set_current_state(TASK_RUNNING);
-		remove_wait_queue(&wait_q, &wait);
-		printk (KERN_WARNING "mtdoops: erase of region [0x%x, 0x%x] "
-				     "on \"%s\" failed\n",
-			erase.addr, erase.len, mtd->name);
-		return ret;
-	}
-
-	schedule();  /* Wait for erase to finish. */
-	remove_wait_queue(&wait_q, &wait);
-
-	return 0;
-}
-
-static int mtdoops_inc_counter(struct mtdoops_context *cxt)
-{
-	struct mtd_info *mtd = cxt->mtd;
-	size_t retlen;
-	u32 count;
-	int ret;
-
-	cxt->nextpage++;
-	if (cxt->nextpage > cxt->oops_pages)
-		cxt->nextpage = 0;
-	cxt->nextcount++;
-	if (cxt->nextcount == 0xffffffff)
-		cxt->nextcount = 0;
-
-	ret = mtd->read(mtd, cxt->nextpage * OOPS_PAGE_SIZE, 4,
-			&retlen, (u_char *) &count);
-	if ((retlen != 4) || (ret < 0)) {
-		printk(KERN_ERR "mtdoops: Read failure at %d (%d of 4 read)"
-				", err %d.\n", cxt->nextpage * OOPS_PAGE_SIZE,
-				retlen, ret);
-		return 1;
-	}
-
-	/* See if we need to erase the next block */
-	if (count != 0xffffffff)
-		return 1;
-
-	printk(KERN_DEBUG "mtdoops: Ready %d, %d (no erase)\n",
-			cxt->nextpage, cxt->nextcount);
-	cxt->ready = 1;
-	return 0;
-}
-
-static void mtdoops_prepare(struct mtdoops_context *cxt)
-{
-	struct mtd_info *mtd = cxt->mtd;
-	int i = 0, j, ret, mod;
-
-	/* We were unregistered */
-	if (!mtd)
-		return;
-
-	mod = (cxt->nextpage * OOPS_PAGE_SIZE) % mtd->erasesize;
-	if (mod != 0) {
-		cxt->nextpage = cxt->nextpage + ((mtd->erasesize - mod) / OOPS_PAGE_SIZE);
-		if (cxt->nextpage > cxt->oops_pages)
-			cxt->nextpage = 0;
-	}
-
-	while (mtd->block_isbad &&
-			mtd->block_isbad(mtd, cxt->nextpage * OOPS_PAGE_SIZE)) {
-badblock:
-		printk(KERN_WARNING "mtdoops: Bad block at %08x\n",
-				cxt->nextpage * OOPS_PAGE_SIZE);
-		i++;
-		cxt->nextpage = cxt->nextpage + (mtd->erasesize / OOPS_PAGE_SIZE);
-		if (cxt->nextpage > cxt->oops_pages)
-			cxt->nextpage = 0;
-		if (i == (cxt->oops_pages / (mtd->erasesize / OOPS_PAGE_SIZE))) {
-			printk(KERN_ERR "mtdoops: All blocks bad!\n");
-			return;
-		}
-	}
-
-	for (j = 0, ret = -1; (j < 3) && (ret < 0); j++)
-		ret = mtdoops_erase_block(mtd, cxt->nextpage * OOPS_PAGE_SIZE);
-
-	if (ret < 0) {
-		if (mtd->block_markbad)
-			mtd->block_markbad(mtd, cxt->nextpage * OOPS_PAGE_SIZE);
-		goto badblock;
-	}
-
-	printk(KERN_DEBUG "mtdoops: Ready %d, %d \n", cxt->nextpage, cxt->nextcount);
-
-	cxt->ready = 1;
-}
-
-static void mtdoops_workfunc(struct work_struct *work)
-{
-	struct mtdoops_context *cxt =
-			container_of(work, struct mtdoops_context, work);
-
-	mtdoops_prepare(cxt);
-}
-
-static int find_next_position(struct mtdoops_context *cxt)
-{
-	struct mtd_info *mtd = cxt->mtd;
-	int page, maxpos = 0;
-	u32 count, maxcount = 0xffffffff;
-	size_t retlen;
-
-	for (page = 0; page < cxt->oops_pages; page++) {
-		mtd->read(mtd, page * OOPS_PAGE_SIZE, 4, &retlen, (u_char *) &count);
-		if (count == 0xffffffff)
-			continue;
-		if (maxcount == 0xffffffff) {
-			maxcount = count;
-			maxpos = page;
-		} else if ((count < 0x40000000) && (maxcount > 0xc0000000)) {
-			maxcount = count;
-			maxpos = page;
-		} else if ((count > maxcount) && (count < 0xc0000000)) {
-			maxcount = count;
-			maxpos = page;
-		} else if ((count > maxcount) && (count > 0xc0000000)
-					&& (maxcount > 0x80000000)) {
-			maxcount = count;
-			maxpos = page;
-		}
-	}
-	if (maxcount == 0xffffffff) {
-		cxt->nextpage = 0;
-		cxt->nextcount = 1;
-		cxt->ready = 1;
-		printk(KERN_DEBUG "mtdoops: Ready %d, %d (first init)\n",
-				cxt->nextpage, cxt->nextcount);
-		return 0;
-	}
-
-	cxt->nextpage = maxpos;
-	cxt->nextcount = maxcount;
-
-	return mtdoops_inc_counter(cxt);
-}
-
-
-static void mtdoops_notify_add(struct mtd_info *mtd)
-{
-	struct mtdoops_context *cxt = &oops_cxt;
-	int ret;
-
-	if ((mtd->index != cxt->mtd_index) || cxt->mtd_index < 0)
-		return;
-
-	if (mtd->size < (mtd->erasesize * 2)) {
-		printk(KERN_ERR "MTD partition %d not big enough for mtdoops\n",
-				mtd->index);
-		return;
-	}
-
-	cxt->mtd = mtd;
-	cxt->oops_pages = mtd->size / OOPS_PAGE_SIZE;
-
-	ret = find_next_position(cxt);
-	if (ret == 1)
-		mtdoops_prepare(cxt);
-
-	printk(KERN_DEBUG "mtdoops: Attached to MTD device %d\n", mtd->index);
-}
-
-static void mtdoops_notify_remove(struct mtd_info *mtd)
-{
-	struct mtdoops_context *cxt = &oops_cxt;
-
-	if ((mtd->index != cxt->mtd_index) || cxt->mtd_index < 0)
-		return;
-
-	cxt->mtd = NULL;
-	flush_scheduled_work();
-}
-
-
-static void
-mtdoops_console_write(struct console *co, const char *s, unsigned int count)
-{
-	struct mtdoops_context *cxt = co->data;
-	struct mtd_info *mtd = cxt->mtd;
-	int i, ret;
-
-	if (!cxt->ready || !mtd)
-		return;
-
-	if (!oops_in_progress && cxt->writecount != 0) {
-		size_t retlen;
-		if (cxt->writecount < OOPS_PAGE_SIZE)
-			memset(cxt->oops_buf + cxt->writecount, 0xff,
-					OOPS_PAGE_SIZE - cxt->writecount);
-
-		ret = mtd->write(mtd, cxt->nextpage * OOPS_PAGE_SIZE,
-					OOPS_PAGE_SIZE, &retlen, cxt->oops_buf);
-		cxt->ready = 0;
-		cxt->writecount = 0;
-
-		if ((retlen != OOPS_PAGE_SIZE) || (ret < 0))
-			printk(KERN_ERR "mtdoops: Write failure at %d (%d of %d"
-				" written), err %d.\n",
-				cxt->nextpage * OOPS_PAGE_SIZE, retlen,
-				OOPS_PAGE_SIZE, ret);
-
-		ret = mtdoops_inc_counter(cxt);
-		if (ret == 1)
-			schedule_work(&cxt->work);
-	}
-
-	if (!oops_in_progress)
-		return;
-
-	if (cxt->writecount == 0) {
-		u32 *stamp = cxt->oops_buf;
-		*stamp = cxt->nextcount;
-		cxt->writecount = 4;
-	}
-
-	if ((count + cxt->writecount) > OOPS_PAGE_SIZE)
-		count = OOPS_PAGE_SIZE - cxt->writecount;
-
-	for (i = 0; i < count; i++, s++)
-		*((char *)(cxt->oops_buf) + cxt->writecount + i) = *s;
-
-	cxt->writecount = cxt->writecount + count;
-}
-
-static int __init mtdoops_console_setup(struct console *co, char *options)
-{
-	struct mtdoops_context *cxt = co->data;
-
-	if (cxt->mtd_index != -1)
-		return -EBUSY;
-	if (co->index == -1)
-		return -EINVAL;
-
-	cxt->mtd_index = co->index;
-	return 0;
-}
-
-static struct mtd_notifier mtdoops_notifier = {
-	.add	= mtdoops_notify_add,
-	.remove	= mtdoops_notify_remove,
-};
-
-static struct console mtdoops_console = {
-	.name		= "ttyMTD",
-	.write		= mtdoops_console_write,
-	.setup		= mtdoops_console_setup,
-	.flags		= CON_PRINTBUFFER,
-	.index		= -1,
-	.data		= &oops_cxt,
-};
-
-static int __init mtdoops_console_init(void)
-{
-	struct mtdoops_context *cxt = &oops_cxt;
-
-	cxt->mtd_index = -1;
-	cxt->oops_buf = vmalloc(OOPS_PAGE_SIZE);
-
-	if (!cxt->oops_buf) {
-		printk(KERN_ERR "Failed to allocate oops buffer workspace\n");
-		return -ENOMEM;
-	}
-
-	INIT_WORK(&cxt->work, mtdoops_workfunc);
-
-	register_console(&mtdoops_console);
-	register_mtd_user(&mtdoops_notifier);
-	return 0;
-}
-
-static void __exit mtdoops_console_exit(void)
-{
-	struct mtdoops_context *cxt = &oops_cxt;
-
-	unregister_mtd_user(&mtdoops_notifier);
-	unregister_console(&mtdoops_console);
-	vfree(cxt->oops_buf);
-}
-
-
-subsys_initcall(mtdoops_console_init);
-module_exit(mtdoops_console_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Richard Purdie <rpurdie@openedhand.com>");
-MODULE_DESCRIPTION("MTD Oops/Panic console logger/driver");