On Wed, 2016-08-24 at 15:52 +0200, Alban Bedel wrote:
> Implement the .set_eeprom callback to allow setting the MAC address
> as well as a few other parameters. Note that the EEPROM must have a
> correct PID/VID checksum set otherwise the SROM is used and reads
> return the SROM content.
>
> Signed-off-by: Alban Bedel <alban.bedel@xxxxxxxxxxxxxxxxx>
> ---
> drivers/net/usb/ax88179_178a.c | 57
> ++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 57 insertions(+)
>
> diff --git a/drivers/net/usb/ax88179_178a.c
> b/drivers/net/usb/ax88179_178a.c
> index e6338c16081a..e6a986303dad 100644
> --- a/drivers/net/usb/ax88179_178a.c
> +++ b/drivers/net/usb/ax88179_178a.c
> @@ -28,6 +28,7 @@
>
> #define AX88179_PHY_ID 0x03
> #define AX_EEPROM_LEN 0x100
> +#define AX_EEPROM_BLOCK 0x40u
> #define AX88179_EEPROM_MAGIC 0x17900b95
> #define AX_MCAST_FLTSIZE 8
> #define AX_MAX_MCAST 64
> @@ -43,6 +44,7 @@
> #define AX_ACCESS_PHY 0x02
> #define AX_ACCESS_EEPROM 0x04
> #define AX_ACCESS_EFUS 0x05
> +#define AX_RELOAD_EEPROM 0x06
> #define AX_PAUSE_WATERLVL_HIGH 0x54
> #define AX_PAUSE_WATERLVL_LOW 0x55
>
> @@ -620,6 +622,60 @@ ax88179_get_eeprom(struct net_device *net, struct
> ethtool_eeprom *eeprom,
> return 0;
> }
>
> +static int
> +ax88179_set_eeprom(struct net_device *net, struct ethtool_eeprom
> *eeprom,
> + u8 *data)
> +{
> + struct usbnet *dev = netdev_priv(net);
> + unsigned int offset = eeprom->offset;
> + unsigned int len = eeprom->len;
> + int i, err = 0;
> + u8 *block;
> +
> + /* The EEPROM data must be aligned on blocks of 64 bytes */
> + if ((offset % AX_EEPROM_BLOCK) || (len % AX_EEPROM_BLOCK)) {
> + offset = eeprom->offset / AX_EEPROM_BLOCK *
> AX_EEPROM_BLOCK;
> + len = eeprom->len + eeprom->offset - offset;
> + len = DIV_ROUND_UP(len, AX_EEPROM_BLOCK) *
> AX_EEPROM_BLOCK;
> +
> + block = kmalloc(len, GFP_KERNEL);
> + if (!block)
> + return -ENOMEM;
> +
> + /* Copy the current data, we could skip some but KISS
> */
> + for (i = 0; i < len; i += AX_EEPROM_BLOCK) {
> + err = __ax88179_read_cmd(dev,
> AX_ACCESS_EEPROM,
> + (offset + i) >> 1,
> + AX_EEPROM_BLOCK >> 1,
> + AX_EEPROM_BLOCK,
> + &block[i], 0);
> + if (err < 0) {
> + kfree(block);
> + return err;
> + }
> + }
> + memcpy(block + eeprom->offset - offset, data,
> eeprom->len);
> + } else {
> + block = data;
> + }
> +
> + for (i = 0; err >= 0 && i < len; i += AX_EEPROM_BLOCK) {
> + err = ax88179_write_cmd(dev, AX_ACCESS_EEPROM,
> + (offset + i) >> 1,
> + AX_EEPROM_BLOCK >> 1,
> + AX_EEPROM_BLOCK, &block[i]);
> + }
> +
> + if (block != data)
> + kfree(block);
And if block == dta, what frees the memory?
Regards
Oliver
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