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authorSascha Hauer <s.hauer@pengutronix.de>2009-06-02 11:47:59 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2009-11-12 08:31:49 +0100
commita3e65b64d5067f86b929eabde82f132b81437da8 (patch)
treef7e000413355bd3fb9bb58339b85fc076fddba22 /drivers/mtd
parent06ecb04ac5c038248d2bcee92a2a4259f2acfa31 (diff)
downloadop-kernel-dev-a3e65b64d5067f86b929eabde82f132b81437da8.zip
op-kernel-dev-a3e65b64d5067f86b929eabde82f132b81437da8.tar.gz
mxc_nand: introduce mxc_do_addr_cycle
This factors the address cycle to a seperate function. This becomes useful in a later patch where we can simplify the command processing by making use of this function. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/nand/mxc_nand.c87
1 files changed, 47 insertions, 40 deletions
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 8aa8a42..325645c 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -658,6 +658,52 @@ static void mxc_nand_select_chip(struct mtd_info *mtd, int chip)
}
}
+static void mxc_do_addr_cycle(struct mtd_info *mtd, int column, int page_addr)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct mxc_nand_host *host = nand_chip->priv;
+
+ /* Write out column address, if necessary */
+ if (column != -1) {
+ /*
+ * MXC NANDFC can only perform full page+spare or
+ * spare-only read/write. When the upper layers
+ * layers perform a read/write buf operation,
+ * we will used the saved column adress to index into
+ * the full page.
+ */
+ send_addr(host, 0, page_addr == -1);
+ if (host->pagesize_2k)
+ /* another col addr cycle for 2k page */
+ send_addr(host, 0, false);
+ }
+
+ /* Write out page address, if necessary */
+ if (page_addr != -1) {
+ /* paddr_0 - p_addr_7 */
+ send_addr(host, (page_addr & 0xff), false);
+
+ if (host->pagesize_2k) {
+ if (mtd->size >= 0x10000000) {
+ /* paddr_8 - paddr_15 */
+ send_addr(host, (page_addr >> 8) & 0xff, false);
+ send_addr(host, (page_addr >> 16) & 0xff, true);
+ } else
+ /* paddr_8 - paddr_15 */
+ send_addr(host, (page_addr >> 8) & 0xff, true);
+ } else {
+ /* One more address cycle for higher density devices */
+ if (mtd->size >= 0x4000000) {
+ /* paddr_8 - paddr_15 */
+ send_addr(host, (page_addr >> 8) & 0xff, false);
+ send_addr(host, (page_addr >> 16) & 0xff, true);
+ } else
+ /* paddr_8 - paddr_15 */
+ send_addr(host, (page_addr >> 8) & 0xff, true);
+ }
+ }
+}
+
/* Used by the upper layer to write command to NAND Flash for
* different operations to be carried out on NAND Flash */
static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
@@ -746,46 +792,7 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
/* Write out the command to the device. */
send_cmd(host, command, useirq);
-
- /* Write out column address, if necessary */
- if (column != -1) {
- /*
- * MXC NANDFC can only perform full page+spare or
- * spare-only read/write. When the upper layers
- * layers perform a read/write buf operation,
- * we will used the saved column adress to index into
- * the full page.
- */
- send_addr(host, 0, page_addr == -1);
- if (host->pagesize_2k)
- /* another col addr cycle for 2k page */
- send_addr(host, 0, false);
- }
-
- /* Write out page address, if necessary */
- if (page_addr != -1) {
- /* paddr_0 - p_addr_7 */
- send_addr(host, (page_addr & 0xff), false);
-
- if (host->pagesize_2k) {
- if (mtd->size >= 0x10000000) {
- /* paddr_8 - paddr_15 */
- send_addr(host, (page_addr >> 8) & 0xff, false);
- send_addr(host, (page_addr >> 16) & 0xff, true);
- } else
- /* paddr_8 - paddr_15 */
- send_addr(host, (page_addr >> 8) & 0xff, true);
- } else {
- /* One more address cycle for higher density devices */
- if (mtd->size >= 0x4000000) {
- /* paddr_8 - paddr_15 */
- send_addr(host, (page_addr >> 8) & 0xff, false);
- send_addr(host, (page_addr >> 16) & 0xff, true);
- } else
- /* paddr_8 - paddr_15 */
- send_addr(host, (page_addr >> 8) & 0xff, true);
- }
- }
+ mxc_do_addr_cycle(mtd, column, page_addr);
/* Command post-processing step */
switch (command) {
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