linux-toradex.git/include/linux/phy.h, branch v2.6.35-rc3

phylib: Support phy module autoloading

2010-04-02T21:30:39+00:00

We don't use the normal hotplug mechanism because it doesn't work. It will
load the module some time after the device appears, but that's not good
enough for us -- we need the driver loaded _immediately_ because otherwise
the NIC driver may just abort and then the phy 'device' goes away.

[bwh: s/phy/mdio/ in module alias, kerneldoc for struct mdio_device_id]

Signed-off-by: David Woodhouse 
Signed-off-by: Ben Hutchings 
Acked-by: Andy Fleming 
Signed-off-by: David S. Miller

NET: Support clause 45 MDIO commands at the MDIO bus level

2010-03-17T04:23:42+00:00

IEEE 802.3ae clause 45 specifies a somewhat modified MDIO protocol
for use by 10GIGE phys. The main change is a 21 bit address split into
a 5 bit device ID and a 16 bit register offset. The definition is designed
so that normal and extended devices can run on the same MDIO bus.

Extend mdio-bitbang to do the new protocol. At the MDIO bus level the
protocol is requested by or'ing MII_ADDR_C45 into the register offset.

Make phy_read/phy_write/etc pass a full 32 bit register offset.

This does not attempt to make the phy layer support C45 style PHYs, just
to provide the MDIO bus support.

Tested against a Broadcom 10GE phy with ID 0x206034, and several
Broadcom 10/100/1000 Phys in normal mode.

Signed-off-by: Jason Gunthorpe 
Signed-off-by: David S. Miller

libphy: add phy_find_first function

2010-02-04T18:23:02+00:00

Many drivers do this in them manually. Now they can use this function.

Signed-off-by: Jiri Pirko 
Signed-off-by: David S. Miller

phylib: Move workqueue initialization to a proper place

2010-01-19T09:59:02+00:00

commit 541cd3ee00a4fe975b22fac6a3bc846bacef37f7 ("phylib: Fix deadlock
on resume") caused TI DaVinci EMAC ethernet driver to oops upon resume:

 PM: resume of devices complete after 237.098 msecs
 Restarting tasks ... done.
 kernel BUG at kernel/workqueue.c:354!
 Unable to handle kernel NULL pointer dereference at virtual address 00000000
 [...]
 Backtrace:
 [] (__bug+0x0/0x2c) from [] (queue_delayed_work_on+0x74/0xf8)
 [] (queue_delayed_work_on+0x0/0xf8) from [] (queue_delayed_work+0x2c/0x30)

The oops pops up because TI DaVinci EMAC driver detaches PHY on
suspend and attaches it back on resume. Attaching makes phylib call
phy_start_machine() that initializes a workqueue. On the other hand,
PHY's resume routine will call phy_start_machine() again, and that
will cause the oops since we just destroyed the already scheduled
workqueue.

This patch fixes the issue by moving workqueue initialization to
phy_device_create().

p.s. We don't see this oops with ucc_geth and gianfar drivers because
they perform a fine-grained suspend, i.e. they just stop the PHYs
without detaching.

Reported-by: Sekhar Nori 
Signed-off-by: Anton Vorontsov 
Tested-by: Sekhar Nori 
Signed-off-by: David S. Miller

phylib: Properly reinitialize PHYs after hibernation

2009-12-31T06:03:42+00:00

Since hibernation assumes power loss, we should fully reinitialize
PHYs (including platform fixups), as if PHYs were just attached.

This patch factors phy_init_hw() out of phy_attach_direct(), then
converts mdio_bus to dev_pm_ops and adds an appropriate restore()
callback.

Signed-off-by: Anton Vorontsov 
Signed-off-by: David S. Miller

phy: Eliminate references to BUS_ID_SIZE.

2009-05-27T04:16:25+00:00

Just use the constant 20 to keep things working.

If someone is so motivated, this can be converted over to
dynamic strings.  I tried and it's a lot of work.

But for now this is good enough.

Signed-off-by: David S. Miller

phylib: add *_direct() variants of phy_connect and phy_attach functions

2009-04-27T09:53:46+00:00

Add phy_connect_direct() and phy_attach_direct() functions so that
drivers can use a pointer to the phy_device instead of trying to determine
the phy's bus_id string.

This patch is useful for OF device tree descriptions of phy devices where
the driver doesn't need or know what the bus_id value in order to get a
phy_device pointer.

Signed-off-by: Grant Likely 
Acked-by: Andy Fleming 
Signed-off-by: David S. Miller

phylib: rework to prepare for OF registration of PHYs

2009-04-27T09:53:45+00:00

This patch makes changes in preparation for supporting open firmware
device tree descriptions of MDIO busses.  Changes include:
- Cleanup handling of phy_map[] entries; they are already NULLed when
  registering and so don't need to be re-cleared, and it is good practice
  to clear them out when unregistering.
- Split phy_device registration out into a new function so that the
  OF helpers can do two stage registration (separate allocation and
  registration steps).

Signed-off-by: Grant Likely 
Acked-by: Andy Fleming 
Signed-off-by: David S. Miller

phylib: Allow early-out in phy_change

2009-04-13T21:51:23+00:00

Marvell 88E1121R Dual PHY device can be hardware-configured
to use shared interrupt pin for both PHY ports. For such
PHY configurations using shared PHY interrupt phy_interrupt()
handler will also schedule a work for PHY port which didn't
cause an interrupt.

This patch adds a possibility for PHY drivers to provide
did_interrupt() function which reports if the PHY (or a PHY
port in a multi-PHY device) generated an interrupt. This
function is called in phy_change() as phy_change() shouldn't
proceed if it is invoked for a PHY which didn't cause an
interrupt. So check for interrupt originator in phy_change()
to allow early-out.

Signed-off-by: Anatolij Gustschin 
Signed-off-by: David S. Miller

phylib: convert state_queue work to delayed_work

2009-03-13T22:41:19+00:00

It closes a race in phy_stop_machine when reprogramming of phy_timer
(from phy_state_machine) happens between del_timer_sync and cancel_work_sync.

Without this change it could lead to crash if phy_device would be freed after
phy_stop_machine (timer would fire and schedule freed work).

Signed-off-by: Marcin Slusarz 
Acked-by: Jean Delvare 
Signed-off-by: David S. Miller