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-rw-r--r--drivers/mtd/onenand/generic.c1
-rw-r--r--drivers/mtd/onenand/onenand_base.c188
-rw-r--r--drivers/mtd/onenand/onenand_bbt.c1
3 files changed, 169 insertions, 21 deletions
diff --git a/drivers/mtd/onenand/generic.c b/drivers/mtd/onenand/generic.c
index 53eb5632bdb..3d44d040a47 100644
--- a/drivers/mtd/onenand/generic.c
+++ b/drivers/mtd/onenand/generic.c
@@ -61,6 +61,7 @@ static int __devinit generic_onenand_probe(struct device *dev)
}
info->onenand.mmcontrol = pdata->mmcontrol;
+ info->onenand.irq = platform_get_irq(pdev, 0);
info->mtd.name = pdev->dev.bus_id;
info->mtd.priv = &info->onenand;
diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index 8ed68b28afe..fc84ddc4987 100644
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -13,6 +13,7 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/sched.h>
+#include <linux/interrupt.h>
#include <linux/jiffies.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/onenand.h>
@@ -330,15 +331,123 @@ static int onenand_wait(struct mtd_info *mtd, int state)
if (interrupt & ONENAND_INT_READ) {
ecc = this->read_word(this->base + ONENAND_REG_ECC_STATUS);
- if (ecc & ONENAND_ECC_2BIT_ALL) {
+ if (ecc) {
DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: ECC error = 0x%04x\n", ecc);
- return -EBADMSG;
+ if (ecc & ONENAND_ECC_2BIT_ALL)
+ mtd->ecc_stats.failed++;
+ else if (ecc & ONENAND_ECC_1BIT_ALL)
+ mtd->ecc_stats.corrected++;
}
}
return 0;
}
+/*
+ * onenand_interrupt - [DEFAULT] onenand interrupt handler
+ * @param irq onenand interrupt number
+ * @param dev_id interrupt data
+ *
+ * complete the work
+ */
+static irqreturn_t onenand_interrupt(int irq, void *data)
+{
+ struct onenand_chip *this = (struct onenand_chip *) data;
+
+ /* To handle shared interrupt */
+ if (!this->complete.done)
+ complete(&this->complete);
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * onenand_interrupt_wait - [DEFAULT] wait until the command is done
+ * @param mtd MTD device structure
+ * @param state state to select the max. timeout value
+ *
+ * Wait for command done.
+ */
+static int onenand_interrupt_wait(struct mtd_info *mtd, int state)
+{
+ struct onenand_chip *this = mtd->priv;
+
+ /* To prevent soft lockup */
+ touch_softlockup_watchdog();
+
+ wait_for_completion(&this->complete);
+
+ return onenand_wait(mtd, state);
+}
+
+/*
+ * onenand_try_interrupt_wait - [DEFAULT] try interrupt wait
+ * @param mtd MTD device structure
+ * @param state state to select the max. timeout value
+ *
+ * Try interrupt based wait (It is used one-time)
+ */
+static int onenand_try_interrupt_wait(struct mtd_info *mtd, int state)
+{
+ struct onenand_chip *this = mtd->priv;
+ unsigned long remain, timeout;
+
+ /* We use interrupt wait first */
+ this->wait = onenand_interrupt_wait;
+
+ /* To prevent soft lockup */
+ touch_softlockup_watchdog();
+
+ timeout = msecs_to_jiffies(100);
+ remain = wait_for_completion_timeout(&this->complete, timeout);
+ if (!remain) {
+ printk(KERN_INFO "OneNAND: There's no interrupt. "
+ "We use the normal wait\n");
+
+ /* Release the irq */
+ free_irq(this->irq, this);
+
+ this->wait = onenand_wait;
+ }
+
+ return onenand_wait(mtd, state);
+}
+
+/*
+ * onenand_setup_wait - [OneNAND Interface] setup onenand wait method
+ * @param mtd MTD device structure
+ *
+ * There's two method to wait onenand work
+ * 1. polling - read interrupt status register
+ * 2. interrupt - use the kernel interrupt method
+ */
+static void onenand_setup_wait(struct mtd_info *mtd)
+{
+ struct onenand_chip *this = mtd->priv;
+ int syscfg;
+
+ init_completion(&this->complete);
+
+ if (this->irq <= 0) {
+ this->wait = onenand_wait;
+ return;
+ }
+
+ if (request_irq(this->irq, &onenand_interrupt,
+ IRQF_SHARED, "onenand", this)) {
+ /* If we can't get irq, use the normal wait */
+ this->wait = onenand_wait;
+ return;
+ }
+
+ /* Enable interrupt */
+ syscfg = this->read_word(this->base + ONENAND_REG_SYS_CFG1);
+ syscfg |= ONENAND_SYS_CFG1_IOBE;
+ this->write_word(syscfg, this->base + ONENAND_REG_SYS_CFG1);
+
+ this->wait = onenand_try_interrupt_wait;
+}
+
/**
* onenand_bufferram_offset - [DEFAULT] BufferRAM offset
* @param mtd MTD data structure
@@ -609,6 +718,7 @@ static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, u_char *buf)
{
struct onenand_chip *this = mtd->priv;
+ struct mtd_ecc_stats stats;
int read = 0, column;
int thislen;
int ret = 0;
@@ -627,6 +737,7 @@ static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
/* TODO handling oob */
+ stats = mtd->ecc_stats;
while (read < len) {
thislen = min_t(int, mtd->writesize, len - read);
@@ -668,7 +779,11 @@ out:
* retlen == desired len and result == -EBADMSG
*/
*retlen = read;
- return ret;
+
+ if (mtd->ecc_stats.failed - stats.failed)
+ return -EBADMSG;
+
+ return mtd->ecc_stats.corrected - stats.corrected ? -EUCLEAN : 0;
}
/**
@@ -1129,7 +1244,6 @@ static void onenand_sync(struct mtd_info *mtd)
onenand_release_device(mtd);
}
-
/**
* onenand_block_isbad - [MTD Interface] Check whether the block at the given offset is bad
* @param mtd MTD device structure
@@ -1196,32 +1310,38 @@ static int onenand_block_markbad(struct mtd_info *mtd, loff_t ofs)
}
/**
- * onenand_unlock - [MTD Interface] Unlock block(s)
+ * onenand_do_lock_cmd - [OneNAND Interface] Lock or unlock block(s)
* @param mtd MTD device structure
* @param ofs offset relative to mtd start
- * @param len number of bytes to unlock
+ * @param len number of bytes to lock or unlock
*
- * Unlock one or more blocks
+ * Lock or unlock one or more blocks
*/
-static int onenand_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
+static int onenand_do_lock_cmd(struct mtd_info *mtd, loff_t ofs, size_t len, int cmd)
{
struct onenand_chip *this = mtd->priv;
int start, end, block, value, status;
+ int wp_status_mask;
start = ofs >> this->erase_shift;
end = len >> this->erase_shift;
+ if (cmd == ONENAND_CMD_LOCK)
+ wp_status_mask = ONENAND_WP_LS;
+ else
+ wp_status_mask = ONENAND_WP_US;
+
/* Continuous lock scheme */
if (this->options & ONENAND_HAS_CONT_LOCK) {
/* Set start block address */
this->write_word(start, this->base + ONENAND_REG_START_BLOCK_ADDRESS);
/* Set end block address */
this->write_word(start + end - 1, this->base + ONENAND_REG_END_BLOCK_ADDRESS);
- /* Write unlock command */
- this->command(mtd, ONENAND_CMD_UNLOCK, 0, 0);
+ /* Write lock command */
+ this->command(mtd, cmd, 0, 0);
/* There's no return value */
- this->wait(mtd, FL_UNLOCKING);
+ this->wait(mtd, FL_LOCKING);
/* Sanity check */
while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS)
@@ -1230,7 +1350,7 @@ static int onenand_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
/* Check lock status */
status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
- if (!(status & ONENAND_WP_US))
+ if (!(status & wp_status_mask))
printk(KERN_ERR "wp status = 0x%x\n", status);
return 0;
@@ -1246,11 +1366,11 @@ static int onenand_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
/* Set start block address */
this->write_word(block, this->base + ONENAND_REG_START_BLOCK_ADDRESS);
- /* Write unlock command */
- this->command(mtd, ONENAND_CMD_UNLOCK, 0, 0);
+ /* Write lock command */
+ this->command(mtd, cmd, 0, 0);
/* There's no return value */
- this->wait(mtd, FL_UNLOCKING);
+ this->wait(mtd, FL_LOCKING);
/* Sanity check */
while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS)
@@ -1259,7 +1379,7 @@ static int onenand_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
/* Check lock status */
status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
- if (!(status & ONENAND_WP_US))
+ if (!(status & wp_status_mask))
printk(KERN_ERR "block = %d, wp status = 0x%x\n", block, status);
}
@@ -1267,6 +1387,32 @@ static int onenand_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
}
/**
+ * onenand_lock - [MTD Interface] Lock block(s)
+ * @param mtd MTD device structure
+ * @param ofs offset relative to mtd start
+ * @param len number of bytes to unlock
+ *
+ * Lock one or more blocks
+ */
+static int onenand_lock(struct mtd_info *mtd, loff_t ofs, size_t len)
+{
+ return onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_LOCK);
+}
+
+/**
+ * onenand_unlock - [MTD Interface] Unlock block(s)
+ * @param mtd MTD device structure
+ * @param ofs offset relative to mtd start
+ * @param len number of bytes to unlock
+ *
+ * Unlock one or more blocks
+ */
+static int onenand_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
+{
+ return onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_UNLOCK);
+}
+
+/**
* onenand_check_lock_status - [OneNAND Interface] Check lock status
* @param this onenand chip data structure
*
@@ -1310,7 +1456,7 @@ static int onenand_unlock_all(struct mtd_info *mtd)
this->command(mtd, ONENAND_CMD_UNLOCK_ALL, 0, 0);
/* There's no return value */
- this->wait(mtd, FL_UNLOCKING);
+ this->wait(mtd, FL_LOCKING);
/* Sanity check */
while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS)
@@ -1334,7 +1480,7 @@ static int onenand_unlock_all(struct mtd_info *mtd)
return 0;
}
- mtd->unlock(mtd, 0x0, this->chipsize);
+ onenand_unlock(mtd, 0x0, this->chipsize);
return 0;
}
@@ -1762,7 +1908,7 @@ static int onenand_probe(struct mtd_info *mtd)
/* Read manufacturer and device IDs from Register */
maf_id = this->read_word(this->base + ONENAND_REG_MANUFACTURER_ID);
dev_id = this->read_word(this->base + ONENAND_REG_DEVICE_ID);
- ver_id= this->read_word(this->base + ONENAND_REG_VERSION_ID);
+ ver_id = this->read_word(this->base + ONENAND_REG_VERSION_ID);
/* Check OneNAND device */
if (maf_id != bram_maf_id || dev_id != bram_dev_id)
@@ -1846,7 +1992,7 @@ int onenand_scan(struct mtd_info *mtd, int maxchips)
if (!this->command)
this->command = onenand_command;
if (!this->wait)
- this->wait = onenand_wait;
+ onenand_setup_wait(mtd);
if (!this->read_bufferram)
this->read_bufferram = onenand_read_bufferram;
@@ -1922,7 +2068,7 @@ int onenand_scan(struct mtd_info *mtd, int maxchips)
mtd->lock_user_prot_reg = onenand_lock_user_prot_reg;
#endif
mtd->sync = onenand_sync;
- mtd->lock = NULL;
+ mtd->lock = onenand_lock;
mtd->unlock = onenand_unlock;
mtd->suspend = onenand_suspend;
mtd->resume = onenand_resume;
diff --git a/drivers/mtd/onenand/onenand_bbt.c b/drivers/mtd/onenand/onenand_bbt.c
index e3822c1cdb8..6cceeca4056 100644
--- a/drivers/mtd/onenand/onenand_bbt.c
+++ b/drivers/mtd/onenand/onenand_bbt.c
@@ -100,6 +100,7 @@ static int create_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
bbm->bbt[i >> 3] |= 0x03 << (i & 0x6);
printk(KERN_WARNING "Bad eraseblock %d at 0x%08x\n",
i >> 1, (unsigned int) from);
+ mtd->ecc_stats.badblocks++;
break;
}
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-27 07:45:34 +0000