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openwrt_archive/target/linux/goldfish/patches-2.6.30/0125--ARM-goldfish-NAND-Add-nand-driver-for-goldfish.patch
Gabor Juhos c5bd1f48fc kernel: upgrade to 2.6.30.8 and refresh patches 
SVN-Revision: 17804
2009-10-01 10:07:32 +00:00

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From bed297dad6283a5926962c1c59f95ad641824630 Mon Sep 17 00:00:00 2001
From: =?utf-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= <arve@google.com>
Date: Fri, 29 Jun 2007 22:20:07 -0700
Subject: [PATCH 125/134] [ARM] goldfish: NAND: Add nand driver for goldfish.
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit
Signed-off-by: Mike A. Chan <mikechan@google.com>
Signed-off-by: Arve Hjønnevåg <arve@android.com>
---
drivers/mtd/devices/Kconfig | 5 +
drivers/mtd/devices/Makefile | 1 +
drivers/mtd/devices/goldfish_nand.c | 418 +++++++++++++++++++++++++++++++
drivers/mtd/devices/goldfish_nand_reg.h | 58 +++++
4 files changed, 482 insertions(+), 0 deletions(-)
create mode 100644 drivers/mtd/devices/goldfish_nand.c
create mode 100644 drivers/mtd/devices/goldfish_nand_reg.h
--- a/drivers/mtd/devices/Kconfig
+++ b/drivers/mtd/devices/Kconfig
@@ -297,5 +297,10 @@ config MTD_DOCPROBE_55AA
LinuxBIOS or if you need to recover a DiskOnChip Millennium on which
you have managed to wipe the first block.
+config MTD_GOLDFISH_NAND
+ tristate "Goldfish NAND device"
+ help
+ none
+
endmenu
--- a/drivers/mtd/devices/Makefile
+++ b/drivers/mtd/devices/Makefile
@@ -16,3 +16,4 @@ obj-$(CONFIG_MTD_LART) += lart.o
obj-$(CONFIG_MTD_BLOCK2MTD) += block2mtd.o
obj-$(CONFIG_MTD_DATAFLASH) += mtd_dataflash.o
obj-$(CONFIG_MTD_M25P80) += m25p80.o
+obj-$(CONFIG_MTD_GOLDFISH_NAND) += goldfish_nand.o
--- /dev/null
+++ b/drivers/mtd/devices/goldfish_nand.c
@@ -0,0 +1,418 @@
+/* drivers/mtd/devices/goldfish_nand.c
+**
+** Copyright (C) 2007 Google, Inc.
+**
+** This software is licensed under the terms of the GNU General Public
+** License version 2, as published by the Free Software Foundation, and
+** may be copied, distributed, and modified under those terms.
+**
+** 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.
+**
+*/
+
+#include <asm/div64.h>
+#include <asm/io.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/ioport.h>
+#include <linux/vmalloc.h>
+#include <linux/init.h>
+#include <linux/mtd/compatmac.h>
+#include <linux/mtd/mtd.h>
+#include <linux/platform_device.h>
+
+#include "goldfish_nand_reg.h"
+
+struct goldfish_nand {
+ spinlock_t lock;
+ unsigned char __iomem *base;
+ size_t mtd_count;
+ struct mtd_info mtd[0];
+};
+
+static uint32_t goldfish_nand_cmd(struct mtd_info *mtd, enum nand_cmd cmd,
+ uint64_t addr, uint32_t len, void *ptr)
+{
+ struct goldfish_nand *nand = mtd->priv;
+ uint32_t rv;
+ unsigned long irq_flags;
+ unsigned char __iomem *base = nand->base;
+
+ spin_lock_irqsave(&nand->lock, irq_flags);
+ writel(mtd - nand->mtd, base + NAND_DEV);
+ writel((uint32_t)(addr >> 32), base + NAND_ADDR_HIGH);
+ writel((uint32_t)addr, base + NAND_ADDR_LOW);
+ writel(len, base + NAND_TRANSFER_SIZE);
+ writel(ptr, base + NAND_DATA);
+ writel(cmd, base + NAND_COMMAND);
+ rv = readl(base + NAND_RESULT);
+ spin_unlock_irqrestore(&nand->lock, irq_flags);
+ return rv;
+}
+
+static int goldfish_nand_erase(struct mtd_info *mtd, struct erase_info *instr)
+{
+ loff_t ofs = instr->addr;
+ uint32_t len = instr->len;
+ uint32_t rem;
+
+ if (ofs + len > mtd->size)
+ goto invalid_arg;
+ rem = do_div(ofs, mtd->writesize);
+ if(rem)
+ goto invalid_arg;
+ ofs *= (mtd->writesize + mtd->oobsize);
+
+ if(len % mtd->writesize)
+ goto invalid_arg;
+ len = len / mtd->writesize * (mtd->writesize + mtd->oobsize);
+
+ if(goldfish_nand_cmd(mtd, NAND_CMD_ERASE, ofs, len, NULL) != len) {
+ printk("goldfish_nand_erase: erase failed, start %llx, len %x, dev_size "
+ "%llx, erase_size %x\n", ofs, len, mtd->size, mtd->erasesize);
+ return -EIO;
+ }
+
+ instr->state = MTD_ERASE_DONE;
+ mtd_erase_callback(instr);
+
+ return 0;
+
+invalid_arg:
+ printk("goldfish_nand_erase: invalid erase, start %llx, len %x, dev_size "
+ "%llx, erase_size %x\n", ofs, len, mtd->size, mtd->erasesize);
+ return -EINVAL;
+}
+
+static int goldfish_nand_read_oob(struct mtd_info *mtd, loff_t ofs,
+ struct mtd_oob_ops *ops)
+{
+ uint32_t rem;
+
+ if(ofs + ops->len > mtd->size)
+ goto invalid_arg;
+ if(ops->datbuf && ops->len && ops->len != mtd->writesize)
+ goto invalid_arg;
+ if(ops->ooblen + ops->ooboffs > mtd->oobsize)
+ goto invalid_arg;
+
+ rem = do_div(ofs, mtd->writesize);
+ if(rem)
+ goto invalid_arg;
+ ofs *= (mtd->writesize + mtd->oobsize);
+
+ if(ops->datbuf)
+ ops->retlen = goldfish_nand_cmd(mtd, NAND_CMD_READ, ofs,
+ ops->len, ops->datbuf);
+ ofs += mtd->writesize + ops->ooboffs;
+ if(ops->oobbuf)
+ ops->oobretlen = goldfish_nand_cmd(mtd, NAND_CMD_READ, ofs,
+ ops->ooblen, ops->oobbuf);
+ return 0;
+
+invalid_arg:
+ printk("goldfish_nand_read_oob: invalid read, start %llx, len %x, "
+ "ooblen %x, dev_size %llx, write_size %x\n",
+ ofs, ops->len, ops->ooblen, mtd->size, mtd->writesize);
+ return -EINVAL;
+}
+
+static int goldfish_nand_write_oob(struct mtd_info *mtd, loff_t ofs,
+ struct mtd_oob_ops *ops)
+{
+ uint32_t rem;
+
+ if(ofs + ops->len > mtd->size)
+ goto invalid_arg;
+ if(ops->len && ops->len != mtd->writesize)
+ goto invalid_arg;
+ if(ops->ooblen + ops->ooboffs > mtd->oobsize)
+ goto invalid_arg;
+
+ rem = do_div(ofs, mtd->writesize);
+ if(rem)
+ goto invalid_arg;
+ ofs *= (mtd->writesize + mtd->oobsize);
+
+ if(ops->datbuf)
+ ops->retlen = goldfish_nand_cmd(mtd, NAND_CMD_WRITE, ofs,
+ ops->len, ops->datbuf);
+ ofs += mtd->writesize + ops->ooboffs;
+ if(ops->oobbuf)
+ ops->oobretlen = goldfish_nand_cmd(mtd, NAND_CMD_WRITE, ofs,
+ ops->ooblen, ops->oobbuf);
+ return 0;
+
+invalid_arg:
+ printk("goldfish_nand_write_oob: invalid write, start %llx, len %x, "
+ "ooblen %x, dev_size %llx, write_size %x\n",
+ ofs, ops->len, ops->ooblen, mtd->size, mtd->writesize);
+ return -EINVAL;
+}
+
+static int goldfish_nand_read(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf)
+{
+ uint32_t rem;
+
+ if(from + len > mtd->size)
+ goto invalid_arg;
+ if(len != mtd->writesize)
+ goto invalid_arg;
+
+ rem = do_div(from, mtd->writesize);
+ if(rem)
+ goto invalid_arg;
+ from *= (mtd->writesize + mtd->oobsize);
+
+ *retlen = goldfish_nand_cmd(mtd, NAND_CMD_READ, from, len, buf);
+ return 0;
+
+invalid_arg:
+ printk("goldfish_nand_read: invalid read, start %llx, len %x, dev_size %llx"
+ ", write_size %x\n", from, len, mtd->size, mtd->writesize);
+ return -EINVAL;
+}
+
+static int goldfish_nand_write(struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const u_char *buf)
+{
+ uint32_t rem;
+
+ if(to + len > mtd->size)
+ goto invalid_arg;
+ if(len != mtd->writesize)
+ goto invalid_arg;
+
+ rem = do_div(to, mtd->writesize);
+ if(rem)
+ goto invalid_arg;
+ to *= (mtd->writesize + mtd->oobsize);
+
+ *retlen = goldfish_nand_cmd(mtd, NAND_CMD_WRITE, to, len, (void *)buf);
+ return 0;
+
+invalid_arg:
+ printk("goldfish_nand_write: invalid write, start %llx, len %x, dev_size %llx"
+ ", write_size %x\n", to, len, mtd->size, mtd->writesize);
+ return -EINVAL;
+}
+
+static int goldfish_nand_block_isbad(struct mtd_info *mtd, loff_t ofs)
+{
+ uint32_t rem;
+
+ if(ofs >= mtd->size)
+ goto invalid_arg;
+
+ rem = do_div(ofs, mtd->erasesize);
+ if(rem)
+ goto invalid_arg;
+ ofs *= mtd->erasesize / mtd->writesize;
+ ofs *= (mtd->writesize + mtd->oobsize);
+
+ return goldfish_nand_cmd(mtd, NAND_CMD_BLOCK_BAD_GET, ofs, 0, NULL);
+
+invalid_arg:
+ printk("goldfish_nand_block_isbad: invalid arg, ofs %llx, dev_size %llx, "
+ "write_size %x\n", ofs, mtd->size, mtd->writesize);
+ return -EINVAL;
+}
+
+static int goldfish_nand_block_markbad(struct mtd_info *mtd, loff_t ofs)
+{
+ uint32_t rem;
+
+ if(ofs >= mtd->size)
+ goto invalid_arg;
+
+ rem = do_div(ofs, mtd->erasesize);
+ if(rem)
+ goto invalid_arg;
+ ofs *= mtd->erasesize / mtd->writesize;
+ ofs *= (mtd->writesize + mtd->oobsize);
+
+ if(goldfish_nand_cmd(mtd, NAND_CMD_BLOCK_BAD_SET, ofs, 0, NULL) != 1)
+ return -EIO;
+ return 0;
+
+invalid_arg:
+ printk("goldfish_nand_block_markbad: invalid arg, ofs %llx, dev_size %llx, "
+ "write_size %x\n", ofs, mtd->size, mtd->writesize);
+ return -EINVAL;
+}
+
+static int goldfish_nand_init_device(struct goldfish_nand *nand, int id)
+{
+ uint32_t name_len;
+ uint32_t result;
+ uint32_t flags;
+ unsigned long irq_flags;
+ unsigned char __iomem *base = nand->base;
+ struct mtd_info *mtd = &nand->mtd[id];
+ char *name;
+
+ spin_lock_irqsave(&nand->lock, irq_flags);
+ writel(id, base + NAND_DEV);
+ flags = readl(base + NAND_DEV_FLAGS);
+ name_len = readl(base + NAND_DEV_NAME_LEN);
+ mtd->writesize = readl(base + NAND_DEV_PAGE_SIZE);
+ mtd->size = readl(base + NAND_DEV_SIZE_LOW);
+ mtd->size |= (uint64_t)readl(base + NAND_DEV_SIZE_HIGH) << 32;
+ mtd->oobsize = readl(base + NAND_DEV_EXTRA_SIZE);
+ mtd->oobavail = mtd->oobsize;
+ mtd->erasesize = readl(base + NAND_DEV_ERASE_SIZE) /
+ (mtd->writesize + mtd->oobsize) * mtd->writesize;
+ do_div(mtd->size, mtd->writesize + mtd->oobsize);
+ mtd->size *= mtd->writesize;
+ printk("goldfish nand dev%d: size %llx, page %d, extra %d, erase %d\n",
+ id, mtd->size, mtd->writesize, mtd->oobsize, mtd->erasesize);
+ spin_unlock_irqrestore(&nand->lock, irq_flags);
+
+ mtd->priv = nand;
+
+ mtd->name = name = kmalloc(name_len + 1, GFP_KERNEL);
+ if(name == NULL)
+ return -ENOMEM;
+
+ result = goldfish_nand_cmd(mtd, NAND_CMD_GET_DEV_NAME, 0, name_len, name);
+ if(result != name_len) {
+ kfree(mtd->name);
+ mtd->name = NULL;
+ printk("goldfish_nand_init_device failed to get dev name %d != %d\n",
+ result, name_len);
+ return -ENODEV;
+ }
+ ((char *) mtd->name)[name_len] = '\0';
+
+ /* Setup the MTD structure */
+ mtd->type = MTD_NANDFLASH;
+ mtd->flags = MTD_CAP_NANDFLASH;
+ if(flags & NAND_DEV_FLAG_READ_ONLY)
+ mtd->flags &= ~MTD_WRITEABLE;
+
+ mtd->owner = THIS_MODULE;
+ mtd->erase = goldfish_nand_erase;
+ mtd->read = goldfish_nand_read;
+ mtd->write = goldfish_nand_write;
+ mtd->read_oob = goldfish_nand_read_oob;
+ mtd->write_oob = goldfish_nand_write_oob;
+ mtd->block_isbad = goldfish_nand_block_isbad;
+ mtd->block_markbad = goldfish_nand_block_markbad;
+
+ if (add_mtd_device(mtd)) {
+ kfree(mtd->name);
+ mtd->name = NULL;
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int goldfish_nand_probe(struct platform_device *pdev)
+{
+ uint32_t num_dev;
+ int i;
+ int err;
+ uint32_t num_dev_working;
+ uint32_t version;
+ struct resource *r;
+ struct goldfish_nand *nand;
+ unsigned char __iomem *base;
+
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if(r == NULL) {
+ err = -ENODEV;
+ goto err_no_io_base;
+ }
+
+ base = ioremap(r->start, PAGE_SIZE);
+ if(base == NULL) {
+ err = -ENOMEM;
+ goto err_ioremap;
+ }
+ version = readl(base + NAND_VERSION);
+ if(version != NAND_VERSION_CURRENT) {
+ printk("goldfish_nand_init: version mismatch, got %d, expected %d\n",
+ version, NAND_VERSION_CURRENT);
+ err = -ENODEV;
+ goto err_no_dev;
+ }
+ num_dev = readl(base + NAND_NUM_DEV);
+ if(num_dev == 0) {
+ err = -ENODEV;
+ goto err_no_dev;
+ }
+
+ nand = kzalloc(sizeof(*nand) + sizeof(struct mtd_info) * num_dev, GFP_KERNEL);
+ if(nand == NULL) {
+ err = -ENOMEM;
+ goto err_nand_alloc_failed;
+ }
+ spin_lock_init(&nand->lock);
+ nand->base = base;
+ nand->mtd_count = num_dev;
+ platform_set_drvdata(pdev, nand);
+
+ num_dev_working = 0;
+ for(i = 0; i < num_dev; i++) {
+ err = goldfish_nand_init_device(nand, i);
+ if(err == 0)
+ num_dev_working++;
+ }
+ if(num_dev_working == 0) {
+ err = -ENODEV;
+ goto err_no_working_dev;
+ }
+ return 0;
+
+err_no_working_dev:
+ kfree(nand);
+err_nand_alloc_failed:
+err_no_dev:
+ iounmap(base);
+err_ioremap:
+err_no_io_base:
+ return err;
+}
+
+static int goldfish_nand_remove(struct platform_device *pdev)
+{
+ struct goldfish_nand *nand = platform_get_drvdata(pdev);
+ int i;
+ for(i = 0; i < nand->mtd_count; i++) {
+ if(nand->mtd[i].name) {
+ del_mtd_device(&nand->mtd[i]);
+ kfree(nand->mtd[i].name);
+ }
+ }
+ iounmap(nand->base);
+ kfree(nand);
+ return 0;
+}
+
+static struct platform_driver goldfish_nand_driver = {
+ .probe = goldfish_nand_probe,
+ .remove = goldfish_nand_remove,
+ .driver = {
+ .name = "goldfish_nand"
+ }
+};
+
+static int __init goldfish_nand_init(void)
+{
+ return platform_driver_register(&goldfish_nand_driver);
+}
+
+static void __exit goldfish_nand_exit(void)
+{
+ platform_driver_unregister(&goldfish_nand_driver);
+}
+
+
+module_init(goldfish_nand_init);
+module_exit(goldfish_nand_exit);
+
--- /dev/null
+++ b/drivers/mtd/devices/goldfish_nand_reg.h
@@ -0,0 +1,58 @@
+/* drivers/mtd/devices/goldfish_nand_reg.h
+**
+** Copyright (C) 2007 Google, Inc.
+**
+** This software is licensed under the terms of the GNU General Public
+** License version 2, as published by the Free Software Foundation, and
+** may be copied, distributed, and modified under those terms.
+**
+** 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.
+**
+*/
+
+#ifndef GOLDFISH_NAND_REG_H
+#define GOLDFISH_NAND_REG_H
+
+enum nand_cmd {
+ NAND_CMD_GET_DEV_NAME, // Write device name for NAND_DEV to NAND_DATA (vaddr)
+ NAND_CMD_READ,
+ NAND_CMD_WRITE,
+ NAND_CMD_ERASE,
+ NAND_CMD_BLOCK_BAD_GET, // NAND_RESULT is 1 if block is bad, 0 if it is not
+ NAND_CMD_BLOCK_BAD_SET
+};
+
+enum nand_dev_flags {
+ NAND_DEV_FLAG_READ_ONLY = 0x00000001
+};
+
+#define NAND_VERSION_CURRENT (1)
+
+enum nand_reg {
+ // Global
+ NAND_VERSION = 0x000,
+ NAND_NUM_DEV = 0x004,
+ NAND_DEV = 0x008,
+
+ // Dev info
+ NAND_DEV_FLAGS = 0x010,
+ NAND_DEV_NAME_LEN = 0x014,
+ NAND_DEV_PAGE_SIZE = 0x018,
+ NAND_DEV_EXTRA_SIZE = 0x01c,
+ NAND_DEV_ERASE_SIZE = 0x020,
+ NAND_DEV_SIZE_LOW = 0x028,
+ NAND_DEV_SIZE_HIGH = 0x02c,
+
+ // Command
+ NAND_RESULT = 0x040,
+ NAND_COMMAND = 0x044,
+ NAND_DATA = 0x048,
+ NAND_TRANSFER_SIZE = 0x04c,
+ NAND_ADDR_LOW = 0x050,
+ NAND_ADDR_HIGH = 0x054,
+};
+
+#endif
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