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Revision 810198bc9c109489dfadc57131c5183ce6ad2d7d authored by Rajashekhara, Sudhakar on 12 July 2011, 10:28:53 UTC, committed by Sekhar Nori on 07 September 2011, 08:53:01 UTC 
ARM: davinci: da850 EVM: read mac address from SPI flash
 
DA850/OMAP-L138 EMAC driver uses random mac address instead of
a fixed one because the mac address is not stuffed into EMAC
platform data.

This patch provides a function which reads the mac address
stored in SPI flash (registered as MTD device) and populates the
EMAC platform data. The function which reads the mac address is
registered as a callback which gets called upon addition of MTD
device.

NOTE: In case the MAC address stored in SPI flash is erased, follow
the instructions at [1] to restore it.

[1] http://processors.wiki.ti.com/index.php/GSG:_OMAP-L138_DVEVM_Additional_Procedures#Restoring_MAC_address_on_SPI_Flash

Modifications in v2:
Guarded registering the mtd_notifier only when MTD is enabled.
Earlier this was handled using mtd_has_partitions() call, but
this has been removed in Linux v3.0.

Modifications in v3:
a. Guarded da850_evm_m25p80_notify_add() function and
   da850evm_spi_notifier structure with CONFIG_MTD macros.
b. Renamed da850_evm_register_mtd_user() function to
   da850_evm_setup_mac_addr() and removed the struct mtd_notifier
   argument to this function.
c. Passed the da850evm_spi_notifier structure to register_mtd_user()
   function.

Modifications in v4:
Moved the da850_evm_setup_mac_addr() function within the first
CONFIG_MTD ifdef construct.

Signed-off-by: Rajashekhara, Sudhakar <sudhakar.raj@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Cc: stable@kernel.org
1 parent ddf2835
Raw File
README.hfc-pci 
The driver for the HFC-PCI and HFC-PCI-A chips from CCD may be used
for many OEM cards using this chips.
Additionally the driver has a special feature which makes it possible
to read the echo-channel of the isdn bus. So all frames in both directions
may be logged.
When the echo logging feature is used the number of available B-channels
for a HFC-PCI card is reduced to 1. Of course this is only relevant to
the card, not to the isdn line.
To activate the echo mode the following ioctls must be entered:

hisaxctrl <driver/cardname> 10 1

This reduces the available channels to 1. There must not be open connections
through this card when entering the command.
And then:

hisaxctrl <driver/cardname> 12 1

This enables the echo mode. If Hex logging is activated the isdnctrlx 
devices show a output with a line beginning of HEX: for the providers
exchange and ECHO: for isdn devices sending to the provider.

If more than one HFC-PCI cards are installed, a specific card may be selected
at the hisax module load command line. Supply the load command with the desired
IO-address of the desired card. 
Example:
There tree cards installed in your machine at IO-base addresses 0xd000, 0xd400 
and 0xdc00
If you want to use the card at 0xd400 standalone you should supply the insmod
or depmod with type=35 io=0xd400.
If you want to use all three cards, but the order needs to be at 0xdc00,0xd400,
0xd000 you may give the parameters type=35,35,35 io=0xdc00,0xd400,0xd00 
Then the desired card will be the initialised in the desired order.
If the io parameter is used the io addresses of all used cards should be 
supplied else the parameter is assumed 0 and a auto search for a free card is
invoked which may not give the wanted result. 

Comments and reports to werner@isdn4linux.de or werner@isdn-development.de
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