[PATCH V3 3/6] pxa3xx_nand: discard wait_for_event, write_cmd, __readid function

[Eric Miao]

On Fri, Oct 22, 2010 at 6:14 PM, Lei Wen <leiwen at marvell.com> wrote:
> Since we have rework the irq process, we don't need additional
> delay in wait_for_event. Also write_cmd and __readid is also
> discarded for the same reason.
>
> Signed-off-by: Lei Wen <leiwen at marvell.com>
> Signed-off-by: Haojian Zhuang <haojian.zhuang at marvell.com>
> Cc: Eric Miao <eric.y.miao at gmail.com>
> Cc: David Woodhouse <dwmw2 at infradead.org>

Ack.

> ---
>  drivers/mtd/nand/pxa3xx_nand.c |   77 +---------------------------------------
>  1 files changed, 1 insertions(+), 76 deletions(-)
>
> diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
> index dc24000..a7f623f 100644
> --- a/drivers/mtd/nand/pxa3xx_nand.c
> +++ b/drivers/mtd/nand/pxa3xx_nand.c
> @@ -258,25 +258,6 @@ static void pxa3xx_nand_set_timing(struct pxa3xx_nand_info *info,
>        nand_writel(info, NDTR1CS0, ndtr1);
>  }
>
> -#define WAIT_EVENT_TIMEOUT     10
> -
> -static int wait_for_event(struct pxa3xx_nand_info *info, uint32_t event)
> -{
> -       int timeout = WAIT_EVENT_TIMEOUT;
> -       uint32_t ndsr;
> -
> -       while (timeout--) {
> -               ndsr = nand_readl(info, NDSR) & NDSR_MASK;
> -               if (ndsr & event) {
> -                       nand_writel(info, NDSR, ndsr);
> -                       return 0;
> -               }
> -               udelay(10);
> -       }
> -
> -       return -ETIMEDOUT;
> -}
> -
>  static void pxa3xx_set_datasize(struct pxa3xx_nand_info *info)
>  {
>        int oob_enable = info->reg_ndcr & NDCR_SPARE_EN;
> @@ -414,35 +395,6 @@ static void disable_int(struct pxa3xx_nand_info *info, uint32_t int_mask)
>        nand_writel(info, NDCR, ndcr | int_mask);
>  }
>
> -/* NOTE: it is a must to set ND_RUN firstly, then write command buffer
> - * otherwise, it does not work
> - */
> -static int write_cmd(struct pxa3xx_nand_info *info)
> -{
> -       uint32_t ndcr;
> -
> -       /* clear status bits and run */
> -       nand_writel(info, NDSR, NDSR_MASK);
> -
> -       ndcr = info->reg_ndcr;
> -
> -       ndcr |= info->use_ecc ? NDCR_ECC_EN : 0;
> -       ndcr |= info->use_dma ? NDCR_DMA_EN : 0;
> -       ndcr |= NDCR_ND_RUN;
> -
> -       nand_writel(info, NDCR, ndcr);
> -
> -       if (wait_for_event(info, NDSR_WRCMDREQ)) {
> -               printk(KERN_ERR "timed out writing command\n");
> -               return -ETIMEDOUT;
> -       }
> -
> -       nand_writel(info, NDCB0, info->ndcb0);
> -       nand_writel(info, NDCB0, info->ndcb1);
> -       nand_writel(info, NDCB0, info->ndcb2);
> -       return 0;
> -}
> -
>  static void handle_data_pio(struct pxa3xx_nand_info *info)
>  {
>        switch (info->state) {
> @@ -789,33 +741,6 @@ static int pxa3xx_nand_ecc_correct(struct mtd_info *mtd,
>        return 0;
>  }
>
> -static int __readid(struct pxa3xx_nand_info *info, uint32_t *id)
> -{
> -       const struct pxa3xx_nand_cmdset *cmdset = info->cmdset;
> -       uint32_t ndcr;
> -       uint8_t  id_buff[8];
> -
> -       prepare_other_cmd(info, cmdset->read_id);
> -
> -       /* Send command */
> -       if (write_cmd(info))
> -               goto fail_timeout;
> -
> -       /* Wait for CMDDM(command done successfully) */
> -       if (wait_for_event(info, NDSR_RDDREQ))
> -               goto fail_timeout;
> -
> -       __raw_readsl(info->mmio_base + NDDB, id_buff, 2);
> -       *id = id_buff[0] | (id_buff[1] << 8);
> -       return 0;
> -
> -fail_timeout:
> -       ndcr = nand_readl(info, NDCR);
> -       nand_writel(info, NDCR, ndcr & ~NDCR_ND_RUN);
> -       udelay(10);
> -       return -ETIMEDOUT;
> -}
> -
>  static int pxa3xx_nand_config_flash(struct pxa3xx_nand_info *info,
>                                    const struct pxa3xx_nand_flash *f)
>  {
> @@ -868,7 +793,7 @@ static int pxa3xx_nand_detect_config(struct pxa3xx_nand_info *info)
>
>        page_per_block = ndcr & NDCR_PG_PER_BLK ? 64 : 32;
>        info->page_size = ndcr & NDCR_PAGE_SZ ? 2048 : 512;
> -       /* set info fields needed to __readid */
> +       /* set info fields needed to read id */
>        info->read_id_bytes = (info->page_size == 2048) ? 4 : 2;
>        info->reg_ndcr = ndcr;
>
> --
> 1.7.0.4
>
>