[U-Boot] [PATCH 5/8] dfu: tftp: update: Add dfu_write_from_mem_addr() function

[Lukasz Majewski <l.majewski@majess.pl>]

Hi Joe,

> Hi Lukasz,
> 
> On Sun, Jul 12, 2015 at 10:30 AM, Lukasz Majewski
> <l.majewski@majess.pl> wrote:
> > This function allows writing via DFU data stored from fixed buffer
> > address (like e.g. loadaddr env variable).
> >
> > Such predefined buffers are used in the update_tftp() code. In fact
> > this function is a wrapper on the dfu_write() and dfu_flush().
> >
> > Signed-off-by: Lukasz Majewski <l.majewski@majess.pl>
> > ---
> >  drivers/dfu/dfu.c | 48
> > ++++++++++++++++++++++++++++++++++++++++++++++++ include/dfu.h
> > |  1 + 2 files changed, 49 insertions(+)
> >
> > diff --git a/drivers/dfu/dfu.c b/drivers/dfu/dfu.c
> > index 332be67..3fbbecc 100644
> > --- a/drivers/dfu/dfu.c
> > +++ b/drivers/dfu/dfu.c
> > @@ -568,3 +568,51 @@ int dfu_get_alt(char *name)
> >
> >         return -ENODEV;
> >  }
> > +
> > +/**
> > + * dfu_write_from_mem_addr - this function adds support for
> > writing data
> > + *                           starting from fixed memory address
> > (like $loadaddr)
> > + *                           to dfu managed medium (e.g. NAND, MMC)
> > + *
> > + * @param dfu - dfu entity to which we want to store data
> > + * @param buf - fixed memory addres from where data starts
> > + * @param size - number of bytes to write
> > + *
> > + * @return - 0 on success, other value on failure
> > + */
> > +int dfu_write_from_mem_addr(struct dfu_entity *dfu, void *buf, int
> > size) +{
> > +       unsigned long dfu_buf_size, write;
> > +       int i, ret = 0, left = size;
> > +       void *dp = buf;
> > +
> > +       /*
> > +        * Here we must call dfu_get_buf(dfu) first to be sure that
> > dfu_buf_size
> > +        * has been properly initialized - e.g. if "dfu_bufsiz" has
> > been taken
> > +        * into account.
> > +        */
> > +       dfu_get_buf(dfu);
> > +       dfu_buf_size = dfu_get_buf_size();
> > +       debug("%s: dfu buf size: %lu\n", __func__, dfu_buf_size);
> > +
> > +       for (i = 0; left > 0; i++) {
> > +               write = (dfu_buf_size < left ? dfu_buf_size : left);
> 
> Please use min() here.

Ok.

> 
> > +
> > +               debug("%s: dp: 0x%p left: %d write: %lu\n",
> > __func__,
> > +                     dp, left, write);
> > +               ret = dfu_write(dfu, dp, write, i);
> > +               if (ret) {
> > +                       error("DFU write failed\n");
> > +                       return ret;
> > +               }
> > +
> > +               dp += write;
> > +               left -= write;
> > +       }
> > +
> > +       ret = dfu_flush(dfu, NULL, 0, i);
> > +       if (ret)
> > +               error("DFU flush failed!");
> > +
> > +       return ret;
> > +}
> > diff --git a/include/dfu.h b/include/dfu.h
> > index adad863..ff4db5d 100644
> > --- a/include/dfu.h
> > +++ b/include/dfu.h
> > @@ -162,6 +162,7 @@ bool dfu_usb_get_reset(void);
> >  int dfu_read(struct dfu_entity *de, void *buf, int size, int
> > blk_seq_num); int dfu_write(struct dfu_entity *de, void *buf, int
> > size, int blk_seq_num); int dfu_flush(struct dfu_entity *de, void
> > *buf, int size, int blk_seq_num); +int
> > dfu_write_from_mem_addr(struct dfu_entity *dfu, void *buf, int
> > size); /* Device specific */ #ifdef CONFIG_DFU_MMC
> >  extern int dfu_fill_entity_mmc(struct dfu_entity *dfu, char
> > *devstr, char *s); --
> > 2.1.4
> >
> > _______________________________________________
> > U-Boot mailing list
> > U-Boot at lists.denx.de
> > http://lists.denx.de/mailman/listinfo/u-boot

Best regards,
Lukasz Majewski
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