linux-kernel - [PATCH 13/17] MTD: export few functions from nand

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Message-Id: <1264863768-27606-14-git-send-email-maximlevitsky@gmail.com>
Date:	Sat, 30 Jan 2010 17:02:44 +0200
From:	Maxim Levitsky <maximlevitsky@...il.com>
To:	David Woodhouse <dwmw2@...radead.org>
Cc:	Artem Bityutskiy <dedekind1@...il.com>,
	linux-mtd <linux-mtd@...ts.infradead.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Alex Dubov <oakad@...oo.com>, joern <joern@...fs.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Maxim Levitsky <maximlevitsky@...il.com>
Subject: [PATCH 13/17] MTD: export few functions from nand_base.c

This exports:

nand_do_read_oob
nand_do_write_oob
nand_get_device
nand_put_device

This functions will be used to implement custom oob based
bad block handling in upcoming smartmedia common module

Signed-off-by: Maxim Levitsky <maximlevitsky@...il.com>
---
 drivers/mtd/nand/nand_base.c |   18 +++++++++---------
 include/linux/mtd/nand.h     |   12 ++++++++++++
 2 files changed, 21 insertions(+), 9 deletions(-)

diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 961c98f..3949d8c 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -96,11 +96,6 @@ static struct nand_ecclayout nand_oob_128 = {
 		 .length = 78}}
 };
 
-static int nand_get_device(struct nand_chip *chip, struct mtd_info *mtd,
-			   int new_state);
-
-static int nand_do_write_oob(struct mtd_info *mtd, loff_t to,
-			     struct mtd_oob_ops *ops);
 
 /*
  * For devices which display every fart in the system on a separate LED. Is
@@ -114,7 +109,7 @@ DEFINE_LED_TRIGGER(nand_led_trigger);
  *
  * Deselect, release chip lock and wake up anyone waiting on the device
  */
-static void nand_release_device(struct mtd_info *mtd)
+void nand_release_device(struct mtd_info *mtd)
 {
 	struct nand_chip *chip = mtd->priv;
 
@@ -128,6 +123,7 @@ static void nand_release_device(struct mtd_info *mtd)
 	wake_up(&chip->controller->wq);
 	spin_unlock(&chip->controller->lock);
 }
+EXPORT_SYMBOL_GPL(nand_release_device);
 
 /**
  * nand_read_byte - [DEFAULT] read one byte from the chip
@@ -721,7 +717,7 @@ static void panic_nand_get_device(struct nand_chip *chip,
  *
  * Get the device and lock it for exclusive access
  */
-static int
+int
 nand_get_device(struct nand_chip *chip, struct mtd_info *mtd, int new_state)
 {
 	spinlock_t *lock = &chip->controller->lock;
@@ -753,6 +749,7 @@ nand_get_device(struct nand_chip *chip, struct mtd_info *mtd, int new_state)
 	remove_wait_queue(wq, &wait);
 	goto retry;
 }
+EXPORT_SYMBOL_GPL(nand_get_device);
 
 /**
  * panic_nand_wait - [GENERIC]  wait until the command is done
@@ -1532,7 +1529,7 @@ static int nand_write_oob_syndrome(struct mtd_info *mtd,
  *
  * NAND read out-of-band data from the spare area
  */
-static int nand_do_read_oob(struct mtd_info *mtd, loff_t from,
+int nand_do_read_oob(struct mtd_info *mtd, loff_t from,
 			    struct mtd_oob_ops *ops)
 {
 	int page, realpage, chipnr, sndcmd = 1;
@@ -1616,6 +1613,7 @@ static int nand_do_read_oob(struct mtd_info *mtd, loff_t from,
 	ops->oobretlen = ops->ooblen;
 	return 0;
 }
+EXPORT_SYMBOL_GPL(nand_do_read_oob);
 
 /**
  * nand_read_oob - [MTD Interface] NAND read data and/or out-of-band
@@ -2108,7 +2106,7 @@ static int nand_write(struct mtd_info *mtd, loff_t to, size_t len,
  *
  * NAND write out-of-band
  */
-static int nand_do_write_oob(struct mtd_info *mtd, loff_t to,
+int nand_do_write_oob(struct mtd_info *mtd, loff_t to,
 			     struct mtd_oob_ops *ops)
 {
 	int chipnr, page, status, len;
@@ -2179,6 +2177,7 @@ static int nand_do_write_oob(struct mtd_info *mtd, loff_t to,
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(nand_do_write_oob);
 
 /**
  * nand_write_oob - [MTD Interface] NAND write data and/or out-of-band
@@ -3080,6 +3079,7 @@ EXPORT_SYMBOL_GPL(nand_scan_ident);
 EXPORT_SYMBOL_GPL(nand_scan_tail);
 EXPORT_SYMBOL_GPL(nand_release);
 
+
 static int __init nand_base_init(void)
 {
 	led_trigger_register_simple("nand-disk", &nand_led_trigger);
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index ccab9df..8c2333a 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -469,6 +469,18 @@ extern int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr,
 extern int nand_do_read(struct mtd_info *mtd, loff_t from, size_t len,
 			size_t * retlen, uint8_t * buf);
 
+extern int nand_do_read_oob(struct mtd_info *mtd, loff_t from,
+			    struct mtd_oob_ops *ops);
+
+extern int nand_do_write_oob(struct mtd_info *mtd, loff_t to,
+			     struct mtd_oob_ops *ops);
+
+extern int nand_get_device(struct nand_chip *chip,
+			struct mtd_info *mtd, int new_state);
+
+extern void nand_release_device(struct mtd_info *mtd);
+
+
 /**
  * struct platform_nand_chip - chip level device structure
  * @nr_chips:		max. number of chips to scan for
-- 
1.6.3.3

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