* [help] PHY driver : Unable to find a PHY (unknown ID?)
@ 2013-01-04 9:09 Mylene Josserand
2013-01-04 10:18 ` Thomas Petazzoni
0 siblings, 1 reply; 7+ messages in thread
From: Mylene Josserand @ 2013-01-04 9:09 UTC (permalink / raw)
To: barebox mailist
Hi everyone !
I am new in compiling Barebox (with OE-core) and I need your help.
I am using the master branch (maybe I need to checkout a tag ?). The
ethernet of my board is a SMSC LAN8700 and the microchip is iMX27.
I have configured the new source of barebox to use the Phylib and MII
drivers. When my barebox starts, I have an error about the PHY driver :
"
Unable to find a PHY (unknown ID?)
dhcp failed: I/O error
dhcp: I/O error
"
My devinfo :
"
barebox:/ devinfo
devices:
`---- platform
`---- imx_iim0
`---- imx27-ccm0
`---- imx1-gpt0
`---- imx1-gpio0
`---- imx1-gpio1
`---- imx1-gpio2
`---- imx1-gpio3
`---- imx1-gpio4
`---- imx1-gpio5
`---- imx21-wdt0
`---- imx27-esdctl0
`---- imx21-uart0
`---- cs0
`---- mem0
`---- 0x00000000-0x07ffffff: /dev/ram0
`---- mem1
`---- 0x00000000-0xfffffffe: /dev/mem
`---- cfi_flash0
`---- 0x00000000-0x01ffffff: /dev/nor0
`---- 0x00000000-0x0003ffff: /dev/self0
`---- 0x00040000-0x0005ffff: /dev/env0
`---- 0x00000000-0x0003ffff: /dev/nor0.barebox
`---- 0x00040000-0x0005ffff: /dev/nor0.bareboxenv
`---- 0x00060000-0x002bffff: /dev/nor0.kernel
`---- 0x002c0000-0x01ffffff: /dev/nor0.root
`---- cfi_flash1
`---- 0x00000000-0x01ffffff: /dev/nor1
`---- imx_nand
`---- nand0
`---- 0x00000000-0x1fffffff: /dev/nand0
`---- 0x00000000-0x00ffffff: /dev/nand_oob0
`---- i2c-fsl0
`---- i2c0
`---- lp39720
`---- 0x00000000-0x000000ff: /dev/lp3972
`---- ds133x0
`---- 0x00000000-0x000000ff: /dev/ds133x
`---- pca95350
`---- 0x00000000-0x000000ff: /dev/pca9535
`---- i2c-fsl1
`---- i2c1
`---- imxfb
`---- imx27-fec
`---- miibus0
`---- eth0
`---- mdio_bus
`---- i2c
`---- fb
`---- fb0
`---- 0x00000000-0x000bb7ff: /dev/fb0
`---- fs
`---- ramfs0
`---- devfs0
`---- net
`---- global
drivers:
imx27-ccm
imx_serial
imx-esdctl
ramfs
devfs
tftp
imx-gpt
imx-gpio
SMSC LAN83C185
SMSC LAN8187
SMSC LAN8700
SMSC LAN911x Internal PHY
SMSC LAN8710/LAN8720
fec_imx
Generic PHY
imx_nand
cfi_flash
i2c-gpio
i2c-fsl
fb
imxfb
lp3972
ds133x
pca9535
imx-watchdog
mem
"
The SMSC LAN8700 is here but I can not make it work !
I have added some prints on the phy.c and the problem is in the fonction
"mdiobus_scan" :
if (!edev->phydev) {
if (addr >= 0) {
dev = mdiobus_scan(bus, addr);
if (!dev) { << Failed here
ret = -EIO;
goto fail;
}
Did I miss something ?
Did I have to specify something in the board info ?
Is it correct to use the master branch ? I tried the v2012.12.1 tag but
I get some errors before starting barebox ("no stack data available" and
other errors).
Thank you in advance for any help and happy new year !
--
Mylène JOSSERAND
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [help] PHY driver : Unable to find a PHY (unknown ID?)
2013-01-04 9:09 [help] PHY driver : Unable to find a PHY (unknown ID?) Mylene Josserand
@ 2013-01-04 10:18 ` Thomas Petazzoni
2013-01-04 11:03 ` Mylene Josserand
0 siblings, 1 reply; 7+ messages in thread
From: Thomas Petazzoni @ 2013-01-04 10:18 UTC (permalink / raw)
To: Mylene Josserand; +Cc: barebox mailist
Dear Mylene Josserand,
Good to see some developers from Toulouse using Barebox! I'm close, in
Colomiers.
On Fri, 4 Jan 2013 10:09:05 +0100, Mylene Josserand wrote:
> I am using the master branch (maybe I need to checkout a tag ?). The
> ethernet of my board is a SMSC LAN8700 and the microchip is iMX27.
>
> I have configured the new source of barebox to use the Phylib and MII
> drivers. When my barebox starts, I have an error about the PHY driver :
Which board are you targeting?
> The SMSC LAN8700 is here but I can not make it work !
>
> I have added some prints on the phy.c and the problem is in the fonction
> "mdiobus_scan" :
>
> if (!edev->phydev) {
> if (addr >= 0) {
> dev = mdiobus_scan(bus, addr);
> if (!dev) { << Failed here
> ret = -EIO;
> goto fail;
> }
>
> Did I miss something ?
Do you have a correct PHY address in the fec_platform_data structure in
your board file?
Best regards,
Thomas
--
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [help] PHY driver : Unable to find a PHY (unknown ID?)
2013-01-04 10:18 ` Thomas Petazzoni
@ 2013-01-04 11:03 ` Mylene Josserand
2013-01-04 11:23 ` Thomas Petazzoni
0 siblings, 1 reply; 7+ messages in thread
From: Mylene Josserand @ 2013-01-04 11:03 UTC (permalink / raw)
To: Thomas Petazzoni; +Cc: barebox mailist
Dear Thomas,
Thank you for your quick answer !
Le 04/01/2013 11:18, Thomas Petazzoni a écrit :
> Dear Mylene Josserand,
>
> Good to see some developers from Toulouse using Barebox! I'm close, in
> Colomiers.
Yes ! We are neighbour :)
Free Electrons, I know you by name. And the kernel sources on your web
site help me a lot !
>
> On Fri, 4 Jan 2013 10:09:05 +0100, Mylene Josserand wrote:
>
>> I am using the master branch (maybe I need to checkout a tag ?). The
>> ethernet of my board is a SMSC LAN8700 and the microchip is iMX27.
>>
>> I have configured the new source of barebox to use the Phylib and MII
>> drivers. When my barebox starts, I have an error about the PHY driver :
>
> Which board are you targeting?
It is a "home-made" board with a iMX27.
>
>> The SMSC LAN8700 is here but I can not make it work !
>>
>> I have added some prints on the phy.c and the problem is in the fonction
>> "mdiobus_scan" :
>>
>> if (!edev->phydev) {
>> if (addr>= 0) {
>> dev = mdiobus_scan(bus, addr);
>> if (!dev) {<< Failed here
>> ret = -EIO;
>> goto fail;
>> }
>>
>> Did I miss something ?
>
> Do you have a correct PHY address in the fec_platform_data structure in
> your board file?
Hum, I did not configured it myself. I used a previous configuration of
the board which was :
"
static struct fec_platform_data fec_info = {
.xcv_type = MII100,
.phy_addr = 1,
};"
How can I know which address I need to put ?
Sorry for, maybe, "newbie" question but I am self-taught in kernel
development.
>
> Best regards,
>
> Thomas
Best regards,
--
Mylène JOSSERAND
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [help] PHY driver : Unable to find a PHY (unknown ID?)
2013-01-04 11:03 ` Mylene Josserand
@ 2013-01-04 11:23 ` Thomas Petazzoni
2013-01-04 12:46 ` Mylene Josserand
0 siblings, 1 reply; 7+ messages in thread
From: Thomas Petazzoni @ 2013-01-04 11:23 UTC (permalink / raw)
To: Mylene Josserand; +Cc: barebox mailist
Dear Mylene Josserand,
On Fri, 4 Jan 2013 12:03:17 +0100, Mylene Josserand wrote:
> > Good to see some developers from Toulouse using Barebox! I'm close, in
> > Colomiers.
>
> Yes ! We are neighbour :)
Indeed :)
> Free Electrons, I know you by name. And the kernel sources on your web
> site help me a lot !
Good to know this is useful.
> > Which board are you targeting?
>
> It is a "home-made" board with a iMX27.
Ok.
> Hum, I did not configured it myself. I used a previous configuration of
> the board which was :
> "
> static struct fec_platform_data fec_info = {
> .xcv_type = MII100,
> .phy_addr = 1,
> };"
>
> How can I know which address I need to put ?
Look at chapter "4.11 PHY Address strapping and LED Output Polarity
Selection" of the LAN8700 manual. It says the PHY address is selected
according to the value on pins PHYAD[0:4] during PHY reset. So you
should check your board schematics and see how these pins are wired to
find out what is the PHY address.
Best regards,
Thomas
--
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [help] PHY driver : Unable to find a PHY (unknown ID?)
2013-01-04 11:23 ` Thomas Petazzoni
@ 2013-01-04 12:46 ` Mylene Josserand
2013-01-04 13:28 ` Eric Bénard
0 siblings, 1 reply; 7+ messages in thread
From: Mylene Josserand @ 2013-01-04 12:46 UTC (permalink / raw)
To: Thomas Petazzoni; +Cc: barebox mailist
Dear Thomas,
Le 04/01/2013 12:23, Thomas Petazzoni a écrit :
> Dear Mylene Josserand,
>
> On Fri, 4 Jan 2013 12:03:17 +0100, Mylene Josserand wrote:
>
>>> Good to see some developers from Toulouse using Barebox! I'm close, in
>>> Colomiers.
>>
>> Yes ! We are neighbour :)
>
> Indeed :)
>
>> Free Electrons, I know you by name. And the kernel sources on your web
>> site help me a lot !
>
> Good to know this is useful.
>
>>> Which board are you targeting?
>>
>> It is a "home-made" board with a iMX27.
>
> Ok.
>
>> Hum, I did not configured it myself. I used a previous configuration of
>> the board which was :
>> "
>> static struct fec_platform_data fec_info = {
>> .xcv_type = MII100,
>> .phy_addr = 1,
>> };"
>>
>> How can I know which address I need to put ?
>
> Look at chapter "4.11 PHY Address strapping and LED Output Polarity
> Selection" of the LAN8700 manual. It says the PHY address is selected
> according to the value on pins PHYAD[0:4] during PHY reset. So you
> should check your board schematics and see how these pins are wired to
> find out what is the PHY address.
Ok, thank you for the explanation.
I have checked and it is the good phy address.
I will search deeper in the code the possible problem but if you have an
idea of it, do not hesitate !
>
> Best regards,
>
> Thomas
Best regards,
--
Mylène JOSSERAND
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [help] PHY driver : Unable to find a PHY (unknown ID?)
2013-01-04 12:46 ` Mylene Josserand
@ 2013-01-04 13:28 ` Eric Bénard
2013-01-07 13:56 ` Mylene Josserand
0 siblings, 1 reply; 7+ messages in thread
From: Eric Bénard @ 2013-01-04 13:28 UTC (permalink / raw)
To: Mylene Josserand; +Cc: barebox mailist
Hi Mylène,
Le Fri, 4 Jan 2013 13:46:15 +0100,
"Mylene Josserand" <Mylene.Josserand@navocap.com> a écrit :
> I will search deeper in the code the possible problem but if you have an
> idea of it, do not hesitate !
>
did you check :
- the pin mux is properly configured for MII operations (on the right
pins connected to the PHY of course),
- the reset pin is deasserted before probing the PHY,
- the FEC's clock is enabled,
Last thing, if you set phy_addr = -1, then IIRC the PHY address will be
probed automatically.
Best regards,
Eric
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [help] PHY driver : Unable to find a PHY (unknown ID?)
2013-01-04 13:28 ` Eric Bénard
@ 2013-01-07 13:56 ` Mylene Josserand
0 siblings, 0 replies; 7+ messages in thread
From: Mylene Josserand @ 2013-01-07 13:56 UTC (permalink / raw)
To: Eric Bénard; +Cc: barebox mailist
Hi Eric Bénard,
Thank you very much for your answer and your help !
Le 04/01/2013 14:28, Eric Bénard a écrit :
> Hi Mylène,
>
> Le Fri, 4 Jan 2013 13:46:15 +0100,
> "Mylene Josserand"<Mylene.Josserand@navocap.com> a écrit :
>> I will search deeper in the code the possible problem but if you have an
>> idea of it, do not hesitate !
>>
> did you check :
> - the pin mux is properly configured for MII operations (on the right
> pins connected to the PHY of course),
I will check that !
> - the reset pin is deasserted before probing the PHY,
> - the FEC's clock is enabled,
I checked and the clock is enabled.
>
> Last thing, if you set phy_addr = -1, then IIRC the PHY address will be
> probed automatically.
I tried it and it fixes the problem ! Maybe the phy_adress was not 1 as
Thomas Petazonni indicated but according to LAN8700 documentation, it
should. I will search which phy_address is currently the good one.
Anyway, thank you Thomas Petazonni and Eric Bénard for your help !
>
> Best regards,
> Eric
Best regards,
--
Mylène JOSSERAND
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
^ permalink raw reply [flat|nested] 7+ messages in thread
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2013-01-04 9:09 [help] PHY driver : Unable to find a PHY (unknown ID?) Mylene Josserand
2013-01-04 10:18 ` Thomas Petazzoni
2013-01-04 11:03 ` Mylene Josserand
2013-01-04 11:23 ` Thomas Petazzoni
2013-01-04 12:46 ` Mylene Josserand
2013-01-04 13:28 ` Eric Bénard
2013-01-07 13:56 ` Mylene Josserand
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