openwrtv4/target/linux/lantiq/patches-4.1/0017-MTD-xway-fix-nand-locking.patch
John Crispin ff08b09570 lantiq: Add support for linux 4.1
All (still relevant) patches were refresh.
The following patches were dropped because they are applied upstream:
- 0003-MIPS-lantiq-handle-vmmc-memory-reservation.patch
- 0005-MIPS-lantiq-add-reset-controller-api-support.patch
- 0006-MIPS-lantiq-reboot-gphy-on-restart.patch
- 0009-MIPS-lantiq-command-line-work-around.patch
- 0010-MIPS-lantiq-export-soc-type.patch
- 0011-lantiq-add-support-for-xrx200-firmware-depending-on-.patch
- 0037-MIPS-lantiq-move-eiu-init-after-irq_domain-register.patch

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>

SVN-Revision: 46216
2015-07-07 13:43:47 +00:00

89 lines
2.6 KiB
Diff

From aa705c1b0860da91f2ed1a4c0b57337e6de689e1 Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Thu, 7 Aug 2014 18:55:31 +0200
Subject: [PATCH 17/36] MTD: xway: fix nand locking
Signed-off-by: John Crispin <blogic@openwrt.org>
---
drivers/mtd/nand/xway_nand.c | 15 +++------------
1 file changed, 3 insertions(+), 12 deletions(-)
--- a/drivers/mtd/nand/xway_nand.c
+++ b/drivers/mtd/nand/xway_nand.c
@@ -80,13 +80,16 @@ static void xway_reset_chip(struct nand_
static void xway_select_chip(struct mtd_info *mtd, int chip)
{
+ static unsigned long csflags;
switch (chip) {
case -1:
ltq_ebu_w32_mask(NAND_CON_CE, 0, EBU_NAND_CON);
ltq_ebu_w32_mask(NAND_CON_NANDM, 0, EBU_NAND_CON);
+ spin_unlock_irqrestore(&ebu_lock, csflags);
break;
case 0:
+ spin_lock_irqsave(&ebu_lock, csflags);
ltq_ebu_w32_mask(0, NAND_CON_NANDM, EBU_NAND_CON);
ltq_ebu_w32_mask(0, NAND_CON_CE, EBU_NAND_CON);
break;
@@ -99,7 +102,6 @@ static void xway_cmd_ctrl(struct mtd_inf
{
struct nand_chip *this = mtd->priv;
unsigned long nandaddr = (unsigned long) this->IO_ADDR_W;
- unsigned long flags;
if (ctrl & NAND_CTRL_CHANGE) {
if (ctrl & NAND_CLE)
@@ -109,11 +111,9 @@ static void xway_cmd_ctrl(struct mtd_inf
}
if (cmd != NAND_CMD_NONE) {
- spin_lock_irqsave(&ebu_lock, flags);
writeb(cmd, (void __iomem *) (nandaddr | xway_latchcmd));
while ((ltq_ebu_r32(EBU_NAND_WAIT) & NAND_WAIT_WR_C) == 0)
;
- spin_unlock_irqrestore(&ebu_lock, flags);
}
}
@@ -126,12 +126,9 @@ static unsigned char xway_read_byte(stru
{
struct nand_chip *this = mtd->priv;
unsigned long nandaddr = (unsigned long) this->IO_ADDR_R;
- unsigned long flags;
int ret;
- spin_lock_irqsave(&ebu_lock, flags);
ret = ltq_r8((void __iomem *)(nandaddr | NAND_READ_DATA));
- spin_unlock_irqrestore(&ebu_lock, flags);
return ret;
}
@@ -140,26 +137,20 @@ static void xway_read_buf(struct mtd_inf
{
struct nand_chip *this = mtd->priv;
unsigned long nandaddr = (unsigned long) this->IO_ADDR_R;
- unsigned long flags;
int i;
- spin_lock_irqsave(&ebu_lock, flags);
for (i = 0; i < len; i++)
buf[i] = ltq_r8((void __iomem *)(nandaddr | NAND_READ_DATA));
- spin_unlock_irqrestore(&ebu_lock, flags);
}
static void xway_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
{
struct nand_chip *this = mtd->priv;
unsigned long nandaddr = (unsigned long) this->IO_ADDR_W;
- unsigned long flags;
int i;
- spin_lock_irqsave(&ebu_lock, flags);
for (i = 0; i < len; i++)
ltq_w8(buf[i], (void __iomem *)(nandaddr | NAND_WRITE_DATA));
- spin_unlock_irqrestore(&ebu_lock, flags);
}
static int xway_nand_probe(struct platform_device *pdev)