On Mon, Sep 10, 2012 at 10:55:46AM +0200, Jan Luebbe wrote:
> This has been tested by using UBI with a N25Q128 connected to
> a TI McSPI controller.
>
> Signed-off-by: Jan Luebbe <jlu@xxxxxxxxxxxxxx>
Applied, thanks
Sascha
> ---
> drivers/nor/m25p80.c | 71 ++++++++++++++++++++++++++++++++++++++++++++++++++
> drivers/nor/m25p80.h | 2 +-
> 2 files changed, 72 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/nor/m25p80.c b/drivers/nor/m25p80.c
> index 61f2195..8775fa9 100644
> --- a/drivers/nor/m25p80.c
> +++ b/drivers/nor/m25p80.c
> @@ -697,6 +697,74 @@ static struct file_operations m25p80_ops = {
> .lseek = dev_lseek_default,
> };
>
> +static int m25p_mtd_read(struct mtd_info *mtd, loff_t from, size_t len,
> + size_t *retlen, u_char *buf)
> +{
> + struct m25p *flash = container_of(mtd, struct m25p, mtd);
> + ssize_t ret;
> +
> + ret = flash->cdev.ops->read(&flash->cdev, buf, len, from, 0);
> + if (ret < 0) {
> + *retlen = 0;
> + return ret;
> + }
> +
> + *retlen = ret;
> + return 0;
> +}
> +
> +static int m25p_mtd_write(struct mtd_info *mtd, loff_t to, size_t len,
> + size_t *retlen, const u_char *buf)
> +{
> + struct m25p *flash = container_of(mtd, struct m25p, mtd);
> + ssize_t ret;
> +
> + ret = flash->cdev.ops->write(&flash->cdev, buf, len, to, 0);
> + if (ret < 0) {
> + *retlen = 0;
> + return ret;
> + }
> +
> + *retlen = ret;
> + return 0;
> +}
> +
> +static int m25p_mtd_erase(struct mtd_info *mtd, struct erase_info *instr)
> +{
> + struct m25p *flash = container_of(mtd, struct m25p, mtd);
> + ssize_t ret;
> +
> + ret = flash->cdev.ops->erase(&flash->cdev, instr->len, instr->addr);
> +
> + if (ret) {
> + instr->state = MTD_ERASE_FAILED;
> + return -EIO;
> + }
> +
> + instr->state = MTD_ERASE_DONE;
> + mtd_erase_callback(instr);
> +
> + return 0;
> +}
> +
> +static void m25p_init_mtd(struct m25p *flash)
> +{
> + struct mtd_info *mtd = &flash->mtd;
> +
> + mtd->read = m25p_mtd_read;
> + mtd->write = m25p_mtd_write;
> + mtd->erase = m25p_mtd_erase;
> + mtd->size = flash->size;
> + mtd->name = flash->cdev.name;
> + mtd->erasesize = flash->erasesize;
> + mtd->writesize = 1;
> + mtd->subpage_sft = 0;
> + mtd->eraseregions = NULL;
> + mtd->numeraseregions = 0;
> + mtd->flags = MTD_CAP_NORFLASH;
> + flash->cdev.mtd = mtd;
> +}
> +
> /*
> * board specific setup should have ensured the SPI clock used here
> * matches what the READ command supports, at least until this driver
> @@ -828,6 +896,9 @@ static int m25p_probe(struct device_d *dev)
>
> dev_info(dev, "%s (%lld Kbytes)\n", id->name, (long long)flash->size >> 10);
>
> + if (IS_ENABLED(CONFIG_PARTITION_NEED_MTD))
> + m25p_init_mtd(flash);
> +
> devfs_create(&flash->cdev);
>
> return 0;
> diff --git a/drivers/nor/m25p80.h b/drivers/nor/m25p80.h
> index 34bf2e2..957900e 100644
> --- a/drivers/nor/m25p80.h
> +++ b/drivers/nor/m25p80.h
> @@ -46,7 +46,7 @@ struct spi_device_id {
> struct m25p {
> struct spi_device *spi;
> struct flash_info *info;
> - struct mtd_info mtd;
> + struct mtd_info mtd;
> struct cdev cdev;
> char *name;
> u32 erasesize;
> --
> 1.7.10.4
>
>
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