[PATCH 2/3] libertas: add sysfs hooks to update boot2 and persistent firmware

[Dan Williams]

On Thu, 2008-07-17 at 11:39 -0700, Brian Cavagnolo wrote:
> On Thu, Jul 17, 2008 at 10:54 AM, Dan Williams <dcbw at redhat.com> wrote:
> > On Wed, 2008-07-16 at 10:28 -0700, Brian Cavagnolo wrote:
> >> To use these features, copy the boot2 and firmware images to /lib/firmware and:
> >>
> >> echo <boot2_image_name> > /sys/class/net/ethX/lbs_boot2
> >> echo <firmware_image_name> > /sys/class/net/ethX/lbs_fw
> >
> > Perhaps "lbs_flash_boot2" and "lbs_flash_fw" would be better names here?
> > Otherwise it looks like one of the drivers that you can choose alternate
> > firmware for (atmel.c for example) and doesn't give any indication that
> > it'll permanently change what's on the dongle.
> 
> Sounds good.  I'll fix that and resubmit.

Just looked again and found the usb8xxx's "lbs_firmware" parameter which
allows you to change the default firmware name on modprobe, which means
it's even more important to change the names of these two new
attributes.  Thanks!

Dan

> Ciao,
> Brian
> 
> >> Signed-off-by: Brian Cavagnolo <brian at cozybit.com>
> >> ---
> >>  drivers/net/wireless/libertas/if_usb.c |   71 ++++++++++++++++++++++++++++++++
> >>  1 files changed, 71 insertions(+), 0 deletions(-)
> >>
> >> diff --git a/drivers/net/wireless/libertas/if_usb.c b/drivers/net/wireless/libertas/if_usb.c
> >> index e83a4c2..c89785c 100644
> >> --- a/drivers/net/wireless/libertas/if_usb.c
> >> +++ b/drivers/net/wireless/libertas/if_usb.c
> >> @@ -51,6 +51,68 @@ static void if_usb_free(struct if_usb_card *cardp);
> >>  static int if_usb_submit_rx_urb(struct if_usb_card *cardp);
> >>  static int if_usb_reset_device(struct if_usb_card *cardp);
> >>
> >> +/* sysfs hooks */
> >> +
> >> +/**
> >> + *  Set function to write firmware to device's persistent memory
> >> + */
> >> +static ssize_t if_usb_firmware_set(struct device *dev,
> >> +             struct device_attribute *attr, const char *buf, size_t count)
> >> +{
> >> +     struct lbs_private *priv = to_net_dev(dev)->priv;
> >> +     struct if_usb_card *cardp = priv->card;
> >> +     char fwname[FIRMWARE_NAME_MAX];
> >> +     int ret;
> >> +
> >> +     if (!(priv->fwcapinfo & FW_CAPINFO_FIRMWARE_UPGRADE))
> >> +             return -EOPNOTSUPP;
> >> +
> >> +     sscanf(buf, "%29s", fwname); /* FIRMWARE_NAME_MAX - 1 = 29 */
> >> +     ret = if_usb_prog_firmware(cardp, fwname, BOOT_CMD_UPDATE_FW);
> >> +     if (ret == 0)
> >> +             return count;
> >> +
> >> +     return ret;
> >> +}
> >> +
> >> +/**
> >> + * lbs_fw attribute to be exported per ethX interface through sysfs
> >> + * (/sys/class/net/ethX/lbs_fw).  Use this like so to write firmware to the
> >> + * device's persistent memory:
> >> + * echo usb8388-5.126.0.p5.bin > /sys/class/net/ethX/lbs_fw
> >> + */
> >> +static DEVICE_ATTR(lbs_fw, 0200, NULL, if_usb_firmware_set);
> >> +
> >> +/**
> >> + *  Set function to write firmware to device's persistent memory
> >> + */
> >> +static ssize_t if_usb_boot2_set(struct device *dev,
> >> +             struct device_attribute *attr, const char *buf, size_t count)
> >> +{
> >> +     struct lbs_private *priv = to_net_dev(dev)->priv;
> >> +     struct if_usb_card *cardp = priv->card;
> >> +     char fwname[FIRMWARE_NAME_MAX];
> >> +     int ret;
> >> +
> >> +     if (!(priv->fwcapinfo & FW_CAPINFO_BOOT2_UPGRADE))
> >> +             return -EOPNOTSUPP;
> >> +
> >> +     sscanf(buf, "%29s", fwname); /* FIRMWARE_NAME_MAX - 1 = 29 */
> >> +     ret = if_usb_prog_firmware(cardp, fwname, BOOT_CMD_UPDATE_BOOT2);
> >> +     if (ret == 0)
> >> +             return count;
> >> +
> >> +     return ret;
> >> +}
> >> +
> >> +/**
> >> + * lbs_boot2 attribute to be exported per ethX interface through sysfs
> >> + * (/sys/class/net/ethX/lbs_boot2).  Use this like so to write firmware to the
> >> + * device's persistent memory:
> >> + * echo usb8388-5.126.0.p5.bin > /sys/class/net/ethX/lbs_boot2
> >> + */
> >> +static DEVICE_ATTR(lbs_boot2, 0200, NULL, if_usb_boot2_set);
> >> +
> >>  /**
> >>   *  @brief  call back function to handle the status of the URB
> >>   *  @param urb               pointer to urb structure
> >> @@ -263,6 +325,12 @@ static int if_usb_probe(struct usb_interface *intf,
> >>       usb_get_dev(udev);
> >>       usb_set_intfdata(intf, cardp);
> >>
> >> +     if (device_create_file(&priv->dev->dev, &dev_attr_lbs_fw))
> >> +             lbs_pr_err("cannot register lbs_fw attribute\n");
> >> +
> >> +     if (device_create_file(&priv->dev->dev, &dev_attr_lbs_boot2))
> >> +             lbs_pr_err("cannot register lbs_boot2 attribute\n");
> >> +
> >>       return 0;
> >>
> >>  err_start_card:
> >> @@ -288,6 +356,9 @@ static void if_usb_disconnect(struct usb_interface *intf)
> >>
> >>       lbs_deb_enter(LBS_DEB_MAIN);
> >>
> >> +     device_remove_file(&priv->dev->dev, &dev_attr_lbs_boot2);
> >> +     device_remove_file(&priv->dev->dev, &dev_attr_lbs_fw);
> >> +
> >>       cardp->surprise_removed = 1;
> >>
> >>       if (priv) {
> >
> >