mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-21 06:33:41 +00:00
90 lines
2.6 KiB
Diff
90 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)
|