diff options
Diffstat (limited to 'drivers/mtd/nand/pxa3xx_nand.c')
| -rw-r--r-- | drivers/mtd/nand/pxa3xx_nand.c | 48 |
1 files changed, 31 insertions, 17 deletions
diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c index 10b1f7a4fe50..a4615fcc3d00 100644 --- a/drivers/mtd/nand/pxa3xx_nand.c +++ b/drivers/mtd/nand/pxa3xx_nand.c @@ -38,8 +38,8 @@ #include <linux/platform_data/mtd-nand-pxa3xx.h> -#define CHIP_DELAY_TIMEOUT (2 * HZ/10) -#define NAND_STOP_DELAY (2 * HZ/50) +#define CHIP_DELAY_TIMEOUT msecs_to_jiffies(200) +#define NAND_STOP_DELAY msecs_to_jiffies(40) #define PAGE_CHUNK_SIZE (2048) /* @@ -605,11 +605,24 @@ static void start_data_dma(struct pxa3xx_nand_info *info) {} #endif +static irqreturn_t pxa3xx_nand_irq_thread(int irq, void *data) +{ + struct pxa3xx_nand_info *info = data; + + handle_data_pio(info); + + info->state = STATE_CMD_DONE; + nand_writel(info, NDSR, NDSR_WRDREQ | NDSR_RDDREQ); + + return IRQ_HANDLED; +} + static irqreturn_t pxa3xx_nand_irq(int irq, void *devid) { struct pxa3xx_nand_info *info = devid; unsigned int status, is_completed = 0, is_ready = 0; unsigned int ready, cmd_done; + irqreturn_t ret = IRQ_HANDLED; if (info->cs == 0) { ready = NDSR_FLASH_RDY; @@ -651,7 +664,8 @@ static irqreturn_t pxa3xx_nand_irq(int irq, void *devid) } else { info->state = (status & NDSR_RDDREQ) ? STATE_PIO_READING : STATE_PIO_WRITING; - handle_data_pio(info); + ret = IRQ_WAKE_THREAD; + goto NORMAL_IRQ_EXIT; } } if (status & cmd_done) { @@ -692,7 +706,7 @@ static irqreturn_t pxa3xx_nand_irq(int irq, void *devid) if (is_ready) complete(&info->dev_ready); NORMAL_IRQ_EXIT: - return IRQ_HANDLED; + return ret; } static inline int is_buf_blank(uint8_t *buf, size_t len) @@ -951,7 +965,7 @@ static void nand_cmdfunc(struct mtd_info *mtd, unsigned command, { struct pxa3xx_nand_host *host = mtd->priv; struct pxa3xx_nand_info *info = host->info_data; - int ret, exec_cmd; + int exec_cmd; /* * if this is a x16 device ,then convert the input @@ -983,9 +997,8 @@ static void nand_cmdfunc(struct mtd_info *mtd, unsigned command, info->need_wait = 1; pxa3xx_nand_start(info); - ret = wait_for_completion_timeout(&info->cmd_complete, - CHIP_DELAY_TIMEOUT); - if (!ret) { + if (!wait_for_completion_timeout(&info->cmd_complete, + CHIP_DELAY_TIMEOUT)) { dev_err(&info->pdev->dev, "Wait time out!!!\n"); /* Stop State Machine for next command cycle */ pxa3xx_nand_stop(info); @@ -1000,7 +1013,7 @@ static void nand_cmdfunc_extended(struct mtd_info *mtd, { struct pxa3xx_nand_host *host = mtd->priv; struct pxa3xx_nand_info *info = host->info_data; - int ret, exec_cmd, ext_cmd_type; + int exec_cmd, ext_cmd_type; /* * if this is a x16 device then convert the input @@ -1063,9 +1076,8 @@ static void nand_cmdfunc_extended(struct mtd_info *mtd, init_completion(&info->cmd_complete); pxa3xx_nand_start(info); - ret = wait_for_completion_timeout(&info->cmd_complete, - CHIP_DELAY_TIMEOUT); - if (!ret) { + if (!wait_for_completion_timeout(&info->cmd_complete, + CHIP_DELAY_TIMEOUT)) { dev_err(&info->pdev->dev, "Wait time out!!!\n"); /* Stop State Machine for next command cycle */ pxa3xx_nand_stop(info); @@ -1198,13 +1210,11 @@ static int pxa3xx_nand_waitfunc(struct mtd_info *mtd, struct nand_chip *this) { struct pxa3xx_nand_host *host = mtd->priv; struct pxa3xx_nand_info *info = host->info_data; - int ret; if (info->need_wait) { - ret = wait_for_completion_timeout(&info->dev_ready, - CHIP_DELAY_TIMEOUT); info->need_wait = 0; - if (!ret) { + if (!wait_for_completion_timeout(&info->dev_ready, + CHIP_DELAY_TIMEOUT)) { dev_err(&info->pdev->dev, "Ready time out!!!\n"); return NAND_STATUS_FAIL; } @@ -1508,6 +1518,8 @@ static int pxa3xx_nand_scan(struct mtd_info *mtd) return ret; } + memset(pxa3xx_flash_ids, 0, sizeof(pxa3xx_flash_ids)); + pxa3xx_flash_ids[0].name = f->name; pxa3xx_flash_ids[0].dev_id = (f->chip_id >> 8) & 0xffff; pxa3xx_flash_ids[0].pagesize = f->page_size; @@ -1710,7 +1722,9 @@ static int alloc_nand_resource(struct platform_device *pdev) /* initialize all interrupts to be disabled */ disable_int(info, NDSR_MASK); - ret = request_irq(irq, pxa3xx_nand_irq, 0, pdev->name, info); + ret = request_threaded_irq(irq, pxa3xx_nand_irq, + pxa3xx_nand_irq_thread, IRQF_ONESHOT, + pdev->name, info); if (ret < 0) { dev_err(&pdev->dev, "failed to request IRQ\n"); goto fail_free_buf; |