linux-kernel - Re: [PATCH] usb driver for intellon based PLC like devolo dlan duo

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Message-ID: <a3ca03e82d9afad72346dc5b4ae251c7.squirrel@webmail.it-technology.at>
Date:	Sat, 18 Apr 2009 08:48:22 +0200 (CEST)
From:	"Peter Holik" <peter@...ik.at>
To:	"Florian Fainelli" <florian@...nwrt.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb driver for intellon based PLC like devolo dlan duo

> Hi Peter,
>
> Nice to see such a driver coming up!

thanks

> Le Friday 17 April 2009 16:10:24 Peter Holik, vous avez écrit :
>> Signed-off-by: Peter Holik <peter@...ik.at>
>> ---
>>  drivers/net/usb/Kconfig    |    7 +
>>  drivers/net/usb/Makefile   |    2 +-
>>  drivers/net/usb/intellon.c |  273
>> ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 281
>> insertions(+), 1 deletions(-)
>>  create mode 100644 drivers/net/usb/intellon.c
>>
>> diff --git a/drivers/net/usb/Kconfig b/drivers/net/usb/Kconfig
>> index 8ee2103..068faa5 100644
>> --- a/drivers/net/usb/Kconfig
>> +++ b/drivers/net/usb/Kconfig
>> @@ -345,4 +345,11 @@ config USB_HSO
>>  	  To compile this driver as a module, choose M here: the
>>  	  module will be called hso.
>>
>> +config USB_NET_INTELLON
>> +	tristate "Intellon PLC based usb adapter"
>> +	depends on USB_USBNET
>> +	help
>> +	  Choose this option if you're using a PLC (Powerline Communications)
>> +	  solution with an Intellon chip, like the "devolo dLan duo".
>> +
>
> Please be more specific, i.e: using a USB-based PLC (...) solution.

> There might be support for PLC PHYs connected to a MII-bus in a near future, even
> though they will not reside in drivers/net/usb/.

What do you mean with the last sentence?

>>  endmenu
>> diff --git a/drivers/net/usb/Makefile b/drivers/net/usb/Makefile
>> index 88a87ee..0fccfe9 100644
>> --- a/drivers/net/usb/Makefile
>> +++ b/drivers/net/usb/Makefile
>> @@ -19,4 +19,4 @@ obj-$(CONFIG_USB_NET_CDC_SUBSET)	+= cdc_subset.o
>>  obj-$(CONFIG_USB_NET_ZAURUS)	+= zaurus.o
>>  obj-$(CONFIG_USB_NET_MCS7830)	+= mcs7830.o
>>  obj-$(CONFIG_USB_USBNET)	+= usbnet.o
>> -
>> +obj-$(CONFIG_USB_NET_INTELLON)	+= intellon.o
>
> I would not name this intellon for the same reasons as explained below, but
> rather int51x1.c since this driver will for instance not work with HomePlug
> AV designs which use different Intellon integrated chips like the 6000 and
> 6300 series.

work in progress...

>> diff --git a/drivers/net/usb/intellon.c b/drivers/net/usb/intellon.c
>> new file mode 100644
>> index 0000000..c9fcc38
>> --- /dev/null
>> +++ b/drivers/net/usb/intellon.c
>> @@ -0,0 +1,273 @@
>> +/*
>> + * Copyright (c) 2009 Peter Holik
>> + *
>> + * Intellon PLC (Powerline Communications) usb net driver
>
> Intellon INT51x1 PLC ...
> [snip]
>
>> +
>> +static u8 nibble(unsigned char c)
>> +{
>> +	if (likely(isdigit(c)))
>> +		return c - '0';
>> +	c = toupper(c);
>> +	if (likely(isxdigit(c)))
>> +		return 10 + c - 'A';
>> +	return 0;
>> +}
>
> Please prefix this with intellon_ (or int51x1_) for instance to avoid any
> possible namespace clash.
>
>> +
>> +static inline int get_ethernet_addr(struct usbnet *dev)
>> +{
>> +	int             tmp, i;
>> +	unsigned char   buf [13];
>> +
>> +	tmp = usb_string(dev->udev, 3, buf, sizeof buf);
>> +	if (tmp != 12) {
>> +		devdbg(dev, "bad MAC string fetch, %d\n", tmp);
>> +		if (tmp >= 0)
>> +			tmp = -EINVAL;
>> +		return tmp;
>> +	}
>> +	for (i = tmp = 0; i < 6; i++, tmp += 2)
>> +		dev->net->dev_addr [i] =
>> +			(nibble(buf [tmp]) << 4) + nibble(buf [tmp + 1]);
>> +	return 0;
>> +}
>
> Same here.

Disagree, because i've taken "nibble" and "get_ethernet_addr" from cdc_ether.c
to have the same code (the version of Jan was different).

> Please fix the intellon prefixing with something more specific to the driver
> like int51x1_ and I am ok with that driver.

ok

cu Peter

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