1 files changed, 428 insertions, 0 deletions

diff --git a/qemu/roms/u-boot/drivers/mtd/mtdpart.c b/qemu/roms/u-boot/drivers/mtd/mtdpart.c
new file mode 100644
index 000000000..146ce11eb
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/mtd/mtdpart.c
@@ -0,0 +1,428 @@
+/*
+ * Simple MTD partitioning layer
+ *
+ * (C) 2000 Nicolas Pitre <nico@cam.org>
+ *
+ * This code is GPL
+ *
+ * 	02-21-2002	Thomas Gleixner <gleixner@autronix.de>
+ *			added support for read_oob, write_oob
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <asm/errno.h>
+
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/compat.h>
+
+/* Our partition linked list */
+struct list_head mtd_partitions;
+
+/* Our partition node structure */
+struct mtd_part {
+	struct mtd_info mtd;
+	struct mtd_info *master;
+	uint64_t offset;
+	int index;
+	struct list_head list;
+	int registered;
+};
+
+/*
+ * Given a pointer to the MTD object in the mtd_part structure, we can retrieve
+ * the pointer to that structure with this macro.
+ */
+#define PART(x)  ((struct mtd_part *)(x))
+
+
+/*
+ * MTD methods which simply translate the effective address and pass through
+ * to the _real_ device.
+ */
+
+static int part_read(struct mtd_info *mtd, loff_t from, size_t len,
+		size_t *retlen, u_char *buf)
+{
+	struct mtd_part *part = PART(mtd);
+	struct mtd_ecc_stats stats;
+	int res;
+
+	stats = part->master->ecc_stats;
+	res = mtd_read(part->master, from + part->offset, len, retlen, buf);
+	if (unlikely(mtd_is_eccerr(res)))
+		mtd->ecc_stats.failed +=
+			part->master->ecc_stats.failed - stats.failed;
+	else
+		mtd->ecc_stats.corrected +=
+			part->master->ecc_stats.corrected - stats.corrected;
+	return res;
+}
+
+static int part_read_oob(struct mtd_info *mtd, loff_t from,
+		struct mtd_oob_ops *ops)
+{
+	struct mtd_part *part = PART(mtd);
+	int res;
+
+	if (from >= mtd->size)
+		return -EINVAL;
+	if (ops->datbuf && from + ops->len > mtd->size)
+		return -EINVAL;
+	res = mtd_read_oob(part->master, from + part->offset, ops);
+
+	if (unlikely(res)) {
+		if (mtd_is_bitflip(res))
+			mtd->ecc_stats.corrected++;
+		if (mtd_is_eccerr(res))
+			mtd->ecc_stats.failed++;
+	}
+	return res;
+}
+
+static int part_read_user_prot_reg(struct mtd_info *mtd, loff_t from,
+		size_t len, size_t *retlen, u_char *buf)
+{
+	struct mtd_part *part = PART(mtd);
+	return mtd_read_user_prot_reg(part->master, from, len, retlen, buf);
+}
+
+static int part_get_user_prot_info(struct mtd_info *mtd,
+		struct otp_info *buf, size_t len)
+{
+	struct mtd_part *part = PART(mtd);
+	return mtd_get_user_prot_info(part->master, buf, len);
+}
+
+static int part_read_fact_prot_reg(struct mtd_info *mtd, loff_t from,
+		size_t len, size_t *retlen, u_char *buf)
+{
+	struct mtd_part *part = PART(mtd);
+	return mtd_read_fact_prot_reg(part->master, from, len, retlen, buf);
+}
+
+static int part_get_fact_prot_info(struct mtd_info *mtd, struct otp_info *buf,
+		size_t len)
+{
+	struct mtd_part *part = PART(mtd);
+	return mtd_get_fact_prot_info(part->master, buf, len);
+}
+
+static int part_write(struct mtd_info *mtd, loff_t to, size_t len,
+		size_t *retlen, const u_char *buf)
+{
+	struct mtd_part *part = PART(mtd);
+	return mtd_write(part->master, to + part->offset, len, retlen, buf);
+}
+
+static int part_write_oob(struct mtd_info *mtd, loff_t to,
+		struct mtd_oob_ops *ops)
+{
+	struct mtd_part *part = PART(mtd);
+
+	if (to >= mtd->size)
+		return -EINVAL;
+	if (ops->datbuf && to + ops->len > mtd->size)
+		return -EINVAL;
+	return mtd_write_oob(part->master, to + part->offset, ops);
+}
+
+static int part_write_user_prot_reg(struct mtd_info *mtd, loff_t from,
+		size_t len, size_t *retlen, u_char *buf)
+{
+	struct mtd_part *part = PART(mtd);
+	return mtd_write_user_prot_reg(part->master, from, len, retlen, buf);
+}
+
+static int part_lock_user_prot_reg(struct mtd_info *mtd, loff_t from,
+		size_t len)
+{
+	struct mtd_part *part = PART(mtd);
+	return mtd_lock_user_prot_reg(part->master, from, len);
+}
+
+static int part_erase(struct mtd_info *mtd, struct erase_info *instr)
+{
+	struct mtd_part *part = PART(mtd);
+	int ret;
+
+	instr->addr += part->offset;
+	ret = mtd_erase(part->master, instr);
+	if (ret) {
+		if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN)
+			instr->fail_addr -= part->offset;
+		instr->addr -= part->offset;
+	}
+	return ret;
+}
+
+void mtd_erase_callback(struct erase_info *instr)
+{
+	if (instr->mtd->_erase == part_erase) {
+		struct mtd_part *part = PART(instr->mtd);
+
+		if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN)
+			instr->fail_addr -= part->offset;
+		instr->addr -= part->offset;
+	}
+	if (instr->callback)
+		instr->callback(instr);
+}
+
+static int part_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
+{
+	struct mtd_part *part = PART(mtd);
+	return mtd_lock(part->master, ofs + part->offset, len);
+}
+
+static int part_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
+{
+	struct mtd_part *part = PART(mtd);
+	return mtd_unlock(part->master, ofs + part->offset, len);
+}
+
+static void part_sync(struct mtd_info *mtd)
+{
+	struct mtd_part *part = PART(mtd);
+	mtd_sync(part->master);
+}
+
+static int part_block_isbad(struct mtd_info *mtd, loff_t ofs)
+{
+	struct mtd_part *part = PART(mtd);
+	ofs += part->offset;
+	return mtd_block_isbad(part->master, ofs);
+}
+
+static int part_block_markbad(struct mtd_info *mtd, loff_t ofs)
+{
+	struct mtd_part *part = PART(mtd);
+	int res;
+
+	ofs += part->offset;
+	res = mtd_block_markbad(part->master, ofs);
+	if (!res)
+		mtd->ecc_stats.badblocks++;
+	return res;
+}
+
+/*
+ * This function unregisters and destroy all slave MTD objects which are
+ * attached to the given master MTD object.
+ */
+
+int del_mtd_partitions(struct mtd_info *master)
+{
+	struct mtd_part *slave, *next;
+
+	list_for_each_entry_safe(slave, next, &mtd_partitions, list)
+		if (slave->master == master) {
+			list_del(&slave->list);
+			if (slave->registered)
+				del_mtd_device(&slave->mtd);
+			kfree(slave);
+		}
+
+	return 0;
+}
+
+static struct mtd_part *add_one_partition(struct mtd_info *master,
+		const struct mtd_partition *part, int partno,
+		uint64_t cur_offset)
+{
+	struct mtd_part *slave;
+
+	/* allocate the partition structure */
+	slave = kzalloc(sizeof(*slave), GFP_KERNEL);
+	if (!slave) {
+		printk(KERN_ERR"memory allocation error while creating partitions for \"%s\"\n",
+			master->name);
+		del_mtd_partitions(master);
+		return NULL;
+	}
+	list_add(&slave->list, &mtd_partitions);
+
+	/* set up the MTD object for this partition */
+	slave->mtd.type = master->type;
+	slave->mtd.flags = master->flags & ~part->mask_flags;
+	slave->mtd.size = part->size;
+	slave->mtd.writesize = master->writesize;
+	slave->mtd.oobsize = master->oobsize;
+	slave->mtd.oobavail = master->oobavail;
+	slave->mtd.subpage_sft = master->subpage_sft;
+
+	slave->mtd.name = part->name;
+	slave->mtd.owner = master->owner;
+
+	slave->mtd._read = part_read;
+	slave->mtd._write = part_write;
+
+	if (master->_read_oob)
+		slave->mtd._read_oob = part_read_oob;
+	if (master->_write_oob)
+		slave->mtd._write_oob = part_write_oob;
+	if (master->_read_user_prot_reg)
+		slave->mtd._read_user_prot_reg = part_read_user_prot_reg;
+	if (master->_read_fact_prot_reg)
+		slave->mtd._read_fact_prot_reg = part_read_fact_prot_reg;
+	if (master->_write_user_prot_reg)
+		slave->mtd._write_user_prot_reg = part_write_user_prot_reg;
+	if (master->_lock_user_prot_reg)
+		slave->mtd._lock_user_prot_reg = part_lock_user_prot_reg;
+	if (master->_get_user_prot_info)
+		slave->mtd._get_user_prot_info = part_get_user_prot_info;
+	if (master->_get_fact_prot_info)
+		slave->mtd._get_fact_prot_info = part_get_fact_prot_info;
+	if (master->_sync)
+		slave->mtd._sync = part_sync;
+	if (master->_lock)
+		slave->mtd._lock = part_lock;
+	if (master->_unlock)
+		slave->mtd._unlock = part_unlock;
+	if (master->_block_isbad)
+		slave->mtd._block_isbad = part_block_isbad;
+	if (master->_block_markbad)
+		slave->mtd._block_markbad = part_block_markbad;
+	slave->mtd._erase = part_erase;
+	slave->master = master;
+	slave->offset = part->offset;
+	slave->index = partno;
+
+	if (slave->offset == MTDPART_OFS_APPEND)
+		slave->offset = cur_offset;
+	if (slave->offset == MTDPART_OFS_NXTBLK) {
+		slave->offset = cur_offset;
+		if (mtd_mod_by_eb(cur_offset, master) != 0) {
+			/* Round up to next erasesize */
+			slave->offset = (mtd_div_by_eb(cur_offset, master) + 1) * master->erasesize;
+			debug("Moving partition %d: 0x%012llx -> 0x%012llx\n",
+			      partno, (unsigned long long)cur_offset,
+			      (unsigned long long)slave->offset);
+		}
+	}
+	if (slave->mtd.size == MTDPART_SIZ_FULL)
+		slave->mtd.size = master->size - slave->offset;
+
+	debug("0x%012llx-0x%012llx : \"%s\"\n",
+	      (unsigned long long)slave->offset,
+	      (unsigned long long)(slave->offset + slave->mtd.size),
+	      slave->mtd.name);
+
+	/* let's do some sanity checks */
+	if (slave->offset >= master->size) {
+		/* let's register it anyway to preserve ordering */
+		slave->offset = 0;
+		slave->mtd.size = 0;
+		printk(KERN_ERR"mtd: partition \"%s\" is out of reach -- disabled\n",
+			part->name);
+		goto out_register;
+	}
+	if (slave->offset + slave->mtd.size > master->size) {
+		slave->mtd.size = master->size - slave->offset;
+		printk(KERN_WARNING"mtd: partition \"%s\" extends beyond the end of device \"%s\" -- size truncated to %#llx\n",
+			part->name, master->name, (unsigned long long)slave->mtd.size);
+	}
+	if (master->numeraseregions > 1) {
+		/* Deal with variable erase size stuff */
+		int i, max = master->numeraseregions;
+		u64 end = slave->offset + slave->mtd.size;
+		struct mtd_erase_region_info *regions = master->eraseregions;
+
+		/* Find the first erase regions which is part of this
+		 * partition. */
+		for (i = 0; i < max && regions[i].offset <= slave->offset; i++)
+			;
+		/* The loop searched for the region _behind_ the first one */
+		i--;
+
+		/* Pick biggest erasesize */
+		for (; i < max && regions[i].offset < end; i++) {
+			if (slave->mtd.erasesize < regions[i].erasesize) {
+				slave->mtd.erasesize = regions[i].erasesize;
+			}
+		}
+		BUG_ON(slave->mtd.erasesize == 0);
+	} else {
+		/* Single erase size */
+		slave->mtd.erasesize = master->erasesize;
+	}
+
+	if ((slave->mtd.flags & MTD_WRITEABLE) &&
+	    mtd_mod_by_eb(slave->offset, &slave->mtd)) {
+		/* Doesn't start on a boundary of major erase size */
+		/* FIXME: Let it be writable if it is on a boundary of
+		 * _minor_ erase size though */
+		slave->mtd.flags &= ~MTD_WRITEABLE;
+		printk(KERN_WARNING"mtd: partition \"%s\" doesn't start on an erase block boundary -- force read-only\n",
+			part->name);
+	}
+	if ((slave->mtd.flags & MTD_WRITEABLE) &&
+	    mtd_mod_by_eb(slave->mtd.size, &slave->mtd)) {
+		slave->mtd.flags &= ~MTD_WRITEABLE;
+		printk(KERN_WARNING"mtd: partition \"%s\" doesn't end on an erase block -- force read-only\n",
+			part->name);
+	}
+
+	slave->mtd.ecclayout = master->ecclayout;
+	if (master->_block_isbad) {
+		uint64_t offs = 0;
+
+		while (offs < slave->mtd.size) {
+			if (mtd_block_isbad(master, offs + slave->offset))
+				slave->mtd.ecc_stats.badblocks++;
+			offs += slave->mtd.erasesize;
+		}
+	}
+
+out_register:
+	if (part->mtdp) {
+		/* store the object pointer (caller may or may not register it*/
+		*part->mtdp = &slave->mtd;
+		slave->registered = 0;
+	} else {
+		/* register our partition */
+		add_mtd_device(&slave->mtd);
+		slave->registered = 1;
+	}
+	return slave;
+}
+
+/*
+ * This function, given a master MTD object and a partition table, creates
+ * and registers slave MTD objects which are bound to the master according to
+ * the partition definitions.
+ *
+ * We don't register the master, or expect the caller to have done so,
+ * for reasons of data integrity.
+ */
+
+int add_mtd_partitions(struct mtd_info *master,
+		       const struct mtd_partition *parts,
+		       int nbparts)
+{
+	struct mtd_part *slave;
+	uint64_t cur_offset = 0;
+	int i;
+
+	/*
+	 * Need to init the list here, since LIST_INIT() does not
+	 * work on platforms where relocation has problems (like MIPS
+	 * & PPC).
+	 */
+	if (mtd_partitions.next == NULL)
+		INIT_LIST_HEAD(&mtd_partitions);
+
+	debug("Creating %d MTD partitions on \"%s\":\n", nbparts, master->name);
+
+	for (i = 0; i < nbparts; i++) {
+		slave = add_one_partition(master, parts + i, i, cur_offset);
+		if (!slave)
+			return -ENOMEM;
+		cur_offset = slave->offset + slave->mtd.size;
+	}
+
+	return 0;
+}