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if config DM9000 or kpanic, no use mutex_lock

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This commit is contained in:
hxy
2010-09-29 16:00:31 +08:00
parent cfd95fc166
commit 9fdec9a2a0
1 changed files with 24 additions and 18 deletions
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42
drivers/mtd/nand/rk2818_nand.c
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@@ -42,9 +42,15 @@
/* Define delays in microsec for NAND device operations */
#define TROP_US_DELAY 2000
static struct mutex rknand_mutex;
//static spinlock_t rknand_lock;
#ifdef CONFIG_DM9000_USE_NAND_CONTROL
static DEFINE_MUTEX(rknand_mutex);
#define RKNAND_LOCK() do { int panic = in_interrupt() | in_atomic(); if (!panic) mutex_lock(&rknand_mutex); } while (0)
#define RKNAND_UNLOCK() do { int panic = in_interrupt() | in_atomic(); if (!panic) mutex_unlock(&rknand_mutex); } while (0)
#else
#define RKNAND_LOCK() do {} while (0)
#define RKNAND_UNLOCK() do {} while (0)
#endif
struct rk2818_nand_mtd {
struct mtd_info mtd;
@@ -213,7 +219,7 @@ static void rk2818_nand_read_buf(struct mtd_info *mtd, u_char* const buf, int le
pNANDC pRK28NC= (pNANDC)(master->regs);
uint32_t i, chipnr;
mutex_lock(&rknand_mutex);
RKNAND_LOCK();
chipnr = master->cs ;
@@ -246,7 +252,7 @@ static void rk2818_nand_read_buf(struct mtd_info *mtd, u_char* const buf, int le
rk2818_nand_select_chip(mtd,-1);
mutex_unlock(&rknand_mutex);
RKNAND_UNLOCK();
return;
@@ -262,7 +268,7 @@ static void rk2818_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int l
uint32_t i = 0, chipnr;
mutex_lock(&rknand_mutex);
RKNAND_LOCK();
chipnr = master->cs ;
@@ -283,7 +289,7 @@ static void rk2818_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int l
rk2818_nand_select_chip(mtd,-1);
mutex_unlock(&rknand_mutex);
RKNAND_UNLOCK();
}
@@ -529,7 +535,7 @@ int rk2818_nand_calculate_ecc(struct mtd_info *mtd,const uint8_t *dat,uint8_t *e
int i,chipnr;
mutex_lock(&rknand_mutex);
RKNAND_LOCK();
chipnr = master->cs ;
@@ -553,7 +559,7 @@ int rk2818_nand_calculate_ecc(struct mtd_info *mtd,const uint8_t *dat,uint8_t *e
rk2818_nand_select_chip(mtd,-1);
mutex_unlock(&rknand_mutex);
RKNAND_UNLOCK();
return 0;
@@ -566,7 +572,7 @@ void rk2818_nand_write_page(struct mtd_info *mtd,struct nand_chip *chip,const u
pNANDC pRK28NC= (pNANDC)(master->regs);
uint32_t i = 0, chipnr;
mutex_lock(&rknand_mutex);
RKNAND_LOCK();
chipnr = master->cs ;
@@ -594,7 +600,7 @@ void rk2818_nand_write_page(struct mtd_info *mtd,struct nand_chip *chip,const u
rk2818_nand_select_chip(mtd,-1);
mutex_unlock(&rknand_mutex);
RKNAND_UNLOCK();
return;
@@ -613,7 +619,7 @@ int rk2818_nand_read_oob(struct mtd_info *mtd, struct nand_chip *chip, int page,
sndcmd = 0;
}
mutex_lock(&rknand_mutex);
RKNAND_LOCK();
chipnr = master->cs ;
@@ -640,7 +646,7 @@ int rk2818_nand_read_oob(struct mtd_info *mtd, struct nand_chip *chip, int page,
rk2818_nand_select_chip(mtd,-1);
mutex_unlock(&rknand_mutex);
RKNAND_UNLOCK();
return sndcmd;
@@ -655,7 +661,7 @@ int rk2818_nand_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip, uint
int i,chipnr;
mutex_lock(&rknand_mutex);
RKNAND_LOCK();
chipnr = master->cs ;
@@ -680,7 +686,7 @@ int rk2818_nand_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip, uint
rk2818_nand_select_chip(mtd,-1);
mutex_unlock(&rknand_mutex);
RKNAND_UNLOCK();
return 0;
@@ -724,11 +730,11 @@ static int rk2818_nand_setrate(struct rk2818_nand_mtd *info)
csrw = timingcfg/4;
rwcs = (timingcfg/4 >=1)?(timingcfg/4):1;
mutex_lock(&rknand_mutex);
RKNAND_LOCK();
pRK28NC ->FMWAIT |= (rwcs<<FMW_RWCS_OFFSET)|(rwpw<<FMW_RWPW_OFFSET)|(csrw<<FMW_CSRW_OFFSET);
mutex_unlock(&rknand_mutex);
RKNAND_UNLOCK();
return 0;
@@ -854,7 +860,6 @@ static int rk2818_nand_probe(struct platform_device *pdev)
}
mutex_init(&rknand_mutex);
master->clk = clk_get(NULL, "nandc");
@@ -1045,7 +1050,7 @@ static void __exit rk2818_nand_exit(void)
platform_driver_unregister(&rk2818_nand_driver);
}
#ifdef CONFIG_DM9000_USE_NAND_CONTROL
// nandc dma cs mutex for dm9000 interface
void rk2818_nand_status_mutex_lock(void)
{
@@ -1072,6 +1077,7 @@ void rk2818_nand_status_mutex_unlock(void)
mutex_unlock(&rknand_mutex);
return;
}
#endif
module_init(rk2818_nand_init);
module_exit(rk2818_nand_exit);