c9ae111a20
This is a backport of the patches accepted to the Linux mainline related to mvebu SoC (Armada XP and Armada 370) between Linux v3.12, and Linux v3.13. This work mainly covers: * Finishes work for sharing the pxa nand driver(drivers/mtd/nand/pxa3xx_nand.c) between the PXA family, and the Armada family. * timer initialization update, and access function for the Armada family. * Generic IRQ handling backporting. * Some bug fixes. Signed-off-by: Seif Mazareeb <seif.mazareeb@gmail.com> CC: Luka Perkov <luka@openwrt.org> SVN-Revision: 39566
90 lines
3.1 KiB
Diff
90 lines
3.1 KiB
Diff
From a701d8e1c4c1e31a208dae616ed9067ba4e90191 Mon Sep 17 00:00:00 2001
|
|
From: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
|
|
Date: Mon, 25 Nov 2013 11:02:51 -0300
|
|
Subject: [PATCH 156/203] mtd: nand: pxa3xx: Use extended cmdfunc() only if
|
|
needed
|
|
|
|
Currently, we have two different cmdfunc's implementations:
|
|
one for PXA3xx SoC variant and one for Armada 370/XP SoC variant.
|
|
|
|
The former is the legacy one, typically constrained to devices
|
|
with page sizes smaller or equal to the controller's FIFO buffer.
|
|
On the other side, the latter _only_ supports the so-called extended
|
|
command semantics, which allow to handle devices with larger
|
|
page sizes (4 KiB, 8 KiB, ...).
|
|
|
|
This means we currently don't support devices with smaller pages on the
|
|
A370/XP SoC. Fix it by first renaming the cmdfuncs variants, and then
|
|
make the choice based on device page size (and SoC variant), rather than
|
|
SoC variant alone.
|
|
|
|
While at it, add a check for page size, to make sure we don't allow larger
|
|
pages sizes on the PXA3xx variant.
|
|
|
|
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
|
|
---
|
|
drivers/mtd/nand/pxa3xx_nand.c | 31 +++++++++++++++++++++----------
|
|
1 file changed, 21 insertions(+), 10 deletions(-)
|
|
|
|
--- a/drivers/mtd/nand/pxa3xx_nand.c
|
|
+++ b/drivers/mtd/nand/pxa3xx_nand.c
|
|
@@ -900,8 +900,8 @@ static int prepare_set_command(struct px
|
|
return exec_cmd;
|
|
}
|
|
|
|
-static void pxa3xx_nand_cmdfunc(struct mtd_info *mtd, unsigned command,
|
|
- int column, int page_addr)
|
|
+static void nand_cmdfunc(struct mtd_info *mtd, unsigned command,
|
|
+ int column, int page_addr)
|
|
{
|
|
struct pxa3xx_nand_host *host = mtd->priv;
|
|
struct pxa3xx_nand_info *info = host->info_data;
|
|
@@ -948,9 +948,9 @@ static void pxa3xx_nand_cmdfunc(struct m
|
|
info->state = STATE_IDLE;
|
|
}
|
|
|
|
-static void armada370_nand_cmdfunc(struct mtd_info *mtd,
|
|
- const unsigned command,
|
|
- int column, int page_addr)
|
|
+static void nand_cmdfunc_extended(struct mtd_info *mtd,
|
|
+ const unsigned command,
|
|
+ int column, int page_addr)
|
|
{
|
|
struct pxa3xx_nand_host *host = mtd->priv;
|
|
struct pxa3xx_nand_info *info = host->info_data;
|
|
@@ -1490,6 +1490,21 @@ KEEP_CONFIG:
|
|
chip->bbt_md = &bbt_mirror_descr;
|
|
}
|
|
|
|
+ /*
|
|
+ * If the page size is bigger than the FIFO size, let's check
|
|
+ * we are given the right variant and then switch to the extended
|
|
+ * (aka splitted) command handling,
|
|
+ */
|
|
+ if (mtd->writesize > PAGE_CHUNK_SIZE) {
|
|
+ if (info->variant == PXA3XX_NAND_VARIANT_ARMADA370) {
|
|
+ chip->cmdfunc = nand_cmdfunc_extended;
|
|
+ } else {
|
|
+ dev_err(&info->pdev->dev,
|
|
+ "unsupported page size on this variant\n");
|
|
+ return -ENODEV;
|
|
+ }
|
|
+ }
|
|
+
|
|
if (info->variant == PXA3XX_NAND_VARIANT_ARMADA370)
|
|
ret = armada370_ecc_init(info, &chip->ecc,
|
|
chip->ecc_strength_ds,
|
|
@@ -1569,11 +1584,7 @@ static int alloc_nand_resource(struct pl
|
|
chip->read_buf = pxa3xx_nand_read_buf;
|
|
chip->write_buf = pxa3xx_nand_write_buf;
|
|
chip->options |= NAND_NO_SUBPAGE_WRITE;
|
|
-
|
|
- if (info->variant == PXA3XX_NAND_VARIANT_ARMADA370)
|
|
- chip->cmdfunc = armada370_nand_cmdfunc;
|
|
- else
|
|
- chip->cmdfunc = pxa3xx_nand_cmdfunc;
|
|
+ chip->cmdfunc = nand_cmdfunc;
|
|
}
|
|
|
|
spin_lock_init(&chip->controller->lock);
|