lkml.org 
[lkml]   [2015]   [Nov]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v5] net: ethernet: add driver for Aurora VLSI NB8800 Ethernet controller
From
Date
[ CCing a few knowledgeable people ]

Despite the subject, this is about an Atheros 8035 PHY :-)

On 12/11/2015 15:04, Måns Rullgård wrote:

> Mason wrote:
>
>> BTW, you're not using the PHY IRQ, right? I think I remember you saying
>> it didn't work reliably?
>
> It doesn't seem to be wired up on any of my boards, or there's some
> magic required to activate it that I'm unaware of.

Weird. The board schematics for the 1172 show Tango ETH0_MDINT# pin
properly connected to AR8035 INT pin (pin 20).

<Thinking out loud>

http://www.redeszone.net/app/uploads/2014/04/AR8035.pdf

INT pin 20
I/O, D, PD
Interrupt Signal to System; default OD-gate, needs an external
10Kohm pull-up, active low; can be configured to I/O by register,
active high.


4.1.17 Interrupt Enable
Offset: 0x12
Mode: Read/Write
Hardware Reset: 0


Strange... it looks like AT803X_INER and AT803X_INTR_ENABLE refer to
the same "Interrupt Enable" register?

In fact, AT803X_INER_INIT == 0xec00 makes sense for register 0x12:
link success/fail, speed/duplex changed, autoneg error

Looks like at803x_config_intr() is used for 8031, but not for 8035...

Relevant commit:
77a9939426f7a "phy/at8031: enable at8031 to work on interrupt mode"

If I add .config_intr and .ack_interrupt to the 8035 struct, then I get
(also added some traces)

[ 0.883517] *** at803x_config_intr: ENABLE
[ 1.576108] *** at803x_config_intr: DISABLE
[ 1.580467] *** at803x_config_intr: ENABLE
[ 1.584959] *** at803x_config_intr: DISABLE
[ 1.589297] *** at803x_config_intr: ENABLE
[ 4.321722] *** at803x_config_intr: DISABLE
[ 4.326054] *** at803x_config_intr: ENABLE
[ 4.330489] nb8800 26000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx
[ 4.338335] *** at803x_config_intr: ENABLE

(Are all the ENABLE/DISABLE events expected?)

And if I unplug/replug the Ethernet cable,

[ 71.903051] *** at803x_config_intr: DISABLE
[ 71.907410] *** at803x_config_intr: ENABLE
[ 71.912232] nb8800 26000.ethernet eth0: Link is Down
[ 71.917309] *** at803x_config_intr: ENABLE
[ 78.008972] *** at803x_config_intr: DISABLE
[ 78.013375] *** at803x_config_intr: ENABLE
[ 78.017797] nb8800 26000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx
[ 78.025702] *** at803x_config_intr: ENABLE

(Are all the ENABLE/DISABLE events expected there too?)

# cat /proc/interrupts
CPU0 CPU1
18: 107 0 irq0 1 Level serial
54: 5 0 irq0 37 Edge phy_interrupt
55: 4953 0 irq0 38 Level eth0
211: 1147 254 GIC 29 Edge twd


Questions:

Can't at803x_ack_interrupt() just return phy_read(phydev, AT803X_INSR);
Can at803x_config_intr() be used with the 8035
What about AT803X_INER/AT803X_INTR_ENABLE and AT803X_INSR/AT803X_INTR_STATUS

Regards.



\
 
 \ /
  Last update: 2015-11-12 17:41    [W:0.074 / U:0.224 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site