MTD: tests: add mtd_pagetest

This test checks that NAND pages read/write work fine.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

1 files changed, 632 insertions, 0 deletions

diff --git a/drivers/mtd/tests/mtd_pagetest.c b/drivers/mtd/tests/mtd_pagetest.c
new file mode 100644
index 000000000000..9648818b9e2c
--- /dev/null
+++ b/drivers/mtd/tests/mtd_pagetest.c
@@ -0,0 +1,632 @@
+/*
+ * Copyright (C) 2006-2008 Nokia Corporation
+ *
+ * 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; see the file COPYING. If not, write to the Free Software
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Test page read and write on MTD device.
+ *
+ * Author: Adrian Hunter <ext-adrian.hunter@nokia.com>
+ */
+
+#include <asm/div64.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/err.h>
+#include <linux/mtd/mtd.h>
+#include <linux/sched.h>
+
+#define PRINT_PREF KERN_INFO "mtd_pagetest: "
+
+static int dev;
+module_param(dev, int, S_IRUGO);
+MODULE_PARM_DESC(dev, "MTD device number to use");
+
+static struct mtd_info *mtd;
+static unsigned char *twopages;
+static unsigned char *writebuf;
+static unsigned char *boundary;
+static unsigned char *bbt;
+
+static int pgsize;
+static int bufsize;
+static int ebcnt;
+static int pgcnt;
+static int errcnt;
+static unsigned long next = 1;
+
+static inline unsigned int simple_rand(void)
+{
+        next = next * 1103515245 + 12345;
+        return (unsigned int)((next / 65536) % 32768);
+}
+
+static inline void simple_srand(unsigned long seed)
+{
+        next = seed;
+}
+
+static void set_random_data(unsigned char *buf, size_t len)
+{
+        size_t i;
+
+        for (i = 0; i < len; ++i)
+                buf[i] = simple_rand();
+}
+
+static int erase_eraseblock(int ebnum)
+{
+        int err;
+        struct erase_info ei;
+        loff_t addr = ebnum * mtd->erasesize;
+
+        memset(&ei, 0, sizeof(struct erase_info));
+        ei.mtd  = mtd;
+        ei.addr = addr;
+        ei.len  = mtd->erasesize;
+
+        err = mtd->erase(mtd, &ei);
+        if (err) {
+                printk(PRINT_PREF "error %d while erasing EB %d\n", err, ebnum);
+                return err;
+        }
+
+        if (ei.state == MTD_ERASE_FAILED) {
+                printk(PRINT_PREF "some erase error occurred at EB %d\n",
+                       ebnum);
+                return -EIO;
+        }
+
+        return 0;
+}
+
+static int write_eraseblock(int ebnum)
+{
+        int err = 0;
+        size_t written = 0;
+        loff_t addr = ebnum * mtd->erasesize;
+
+        set_random_data(writebuf, mtd->erasesize);
+        cond_resched();
+        err = mtd->write(mtd, addr, mtd->erasesize, &written, writebuf);
+        if (err || written != mtd->erasesize)
+                printk(PRINT_PREF "error: write failed at %#llx\n",
+                       (long long)addr);
+
+        return err;
+}
+
+static int verify_eraseblock(int ebnum)
+{
+        uint32_t j;
+        size_t read = 0;
+        int err = 0, i;
+        loff_t addr0, addrn;
+        loff_t addr = ebnum * mtd->erasesize;
+
+        addr0 = 0;
+        for (i = 0; bbt[i] && i < ebcnt; ++i)
+                addr0 += mtd->erasesize;
+
+        addrn = mtd->size;
+        for (i = 0; bbt[ebcnt - i - 1] && i < ebcnt; ++i)
+                addrn -= mtd->erasesize;
+
+        set_random_data(writebuf, mtd->erasesize);
+        for (j = 0; j < pgcnt - 1; ++j, addr += pgsize) {
+                /* Do a read to set the internal dataRAMs to different data */
+                err = mtd->read(mtd, addr0, bufsize, &read, twopages);
+                if (err == -EUCLEAN)
+                        err = 0;
+                if (err || read != bufsize) {
+                        printk(PRINT_PREF "error: read failed at %#llx\n",
+                               (long long)addr0);
+                        return err;
+                }
+                err = mtd->read(mtd, addrn - bufsize, bufsize, &read, twopages);
+                if (err == -EUCLEAN)
+                        err = 0;
+                if (err || read != bufsize) {
+                        printk(PRINT_PREF "error: read failed at %#llx\n",
+                               (long long)(addrn - bufsize));
+                        return err;
+                }
+                memset(twopages, 0, bufsize);
+                read = 0;
+                err = mtd->read(mtd, addr, bufsize, &read, twopages);
+                if (err == -EUCLEAN)
+                        err = 0;
+                if (err || read != bufsize) {
+                        printk(PRINT_PREF "error: read failed at %#llx\n",
+                               (long long)addr);
+                        break;
+                }
+                if (memcmp(twopages, writebuf + (j * pgsize), bufsize)) {
+                        printk(PRINT_PREF "error: verify failed at %#llx\n",
+                               (long long)addr);
+                        errcnt += 1;
+                }
+        }
+        /* Check boundary between eraseblocks */
+        if (addr <= addrn - pgsize - pgsize && !bbt[ebnum + 1]) {
+                unsigned long oldnext = next;
+                /* Do a read to set the internal dataRAMs to different data */
+                err = mtd->read(mtd, addr0, bufsize, &read, twopages);
+                if (err == -EUCLEAN)
+                        err = 0;
+                if (err || read != bufsize) {
+                        printk(PRINT_PREF "error: read failed at %#llx\n",
+                               (long long)addr0);
+                        return err;
+                }
+                err = mtd->read(mtd, addrn - bufsize, bufsize, &read, twopages);
+                if (err == -EUCLEAN)
+                        err = 0;
+                if (err || read != bufsize) {
+                        printk(PRINT_PREF "error: read failed at %#llx\n",
+                               (long long)(addrn - bufsize));
+                        return err;
+                }
+                memset(twopages, 0, bufsize);
+                read = 0;
+                err = mtd->read(mtd, addr, bufsize, &read, twopages);
+                if (err == -EUCLEAN)
+                        err = 0;
+                if (err || read != bufsize) {
+                        printk(PRINT_PREF "error: read failed at %#llx\n",
+                               (long long)addr);
+                        return err;
+                }
+                memcpy(boundary, writebuf + mtd->erasesize - pgsize, pgsize);