I share a document to access HW on L4 Linux.
Thank you L4 Hackers. You have help me in securing Ethernet on L4 Linux. So, I succeeded it. I’m particularly grateful to Martin Schröder, Wei jin, Adam Lackorzynski, Matthias Lange. Although there is already a document 'L4 Runtime Environments : Io, the Io server' a link of which is http://os.inf.tu-dresden.de/L4Re/doc/io.html, I made a guide document for accessing HW on L4 Linux because of ethernet example. (I've used ARM platform Freescale i.MX6 Quad SABRESD ) This document is https://www.dropbox.com/s/abj9ao5uk9r3w72/The_Guide_to_access_HW_on_L4Linux_... I don’t know whether this document can help someone in accessing HW on L4Linux. But I want to share this document in order to repay for l4hackers's kindness. - Taeung -
On Tue, 2014-05-20 at 13:59 +0900, Taeung wrote:
Thank you L4 Hackers.
You have help me in securing Ethernet on L4 Linux. So, I succeeded it. I’m particularly grateful to Martin Schröder, Wei jin, Adam Lackorzynski, Matthias Lange.
Although there is already a document 'L4 Runtime Environments : Io, the Io server' a link of which is http://os.inf.tu-dresden.de/L4Re/doc/io.html, I made a guide document for accessing HW on L4 Linux because of ethernet example. (I've used ARM platform Freescale i.MX6 Quad SABRESD )
This document is https://www.dropbox.com/s/abj9ao5uk9r3w72/The_Guide_to_access_HW_on_L4Linux_...
I don’t know whether this document can help someone in accessing HW on L4Linux.
I thought I'd let you know I found the document useful. The webpage you reference above only really describes the basics of how the IO sever works. And although I don't think there's anything in your document that I couldn't have (eventually) extracted from the existing code, having it listed in a step-by-step fashion was a great help for cross-checking what I was doing.
But I want to share this document in order to repay for l4hackers's kindness.
If you're interested, I have some feedback on the document; contact me off-list. -- Peter Howard <pjh@northern-ridge.com.au>
hi, L4 hackers and Taeung, I am a newbie of L4Linux ,and I appreciate you share The_Guide_to_access_HW_on_L4Linux_v1.0.pdf through the following thread. https://os.inf.tu-dresden.de/pipermail/l4-hackers/2014/006463.html I followed the guide to access my i2c HW on Freescale i.MX6 Quad SABRE SD board. Got some progress, but still I can not have imx-i2c driver probe function called. This is what I have achieved from the log. The I2C device is registered to IO server IO | P6Device: l4linux "" IO | P6Device: (noname) "L40009" IO | P6Device: imx-i2c.dev "imx-i2c.2" IO | <0x145d0> IOMEM [000000021a8000-000000021a8fff 1000] non-pref (3) IO | <0x14628> IRQ [0000000000002e-0000000000002e 1] none (32bit) () IO | Real Hardware ----------------------------------- IO | P6Device: System Bus "" IO | Hw::Device[System Bus] IO | P6Device: i2c "imx-i2c.2" IO | Hw::Device[i2c] IO | <0x145d0> IOMEM [000000021a8000-000000021a8fff 1000] non-pref (3) IO | <0x14628> IRQ [0000000000002e-0000000000002e 1] none (32bit) () and the device is scaned by L4Linux l4linux | Device scan: l4linux | Device: (noname) l4linux | Device: imx-i2c.dev l4linux | MEM: 021a8000 - 021a8fff l4linux | IRQ: 0000002e - 0000002e l4linux | Device scan done. This is what I have modified. 1. Modified mach_setup.c file and double check device name is identical to that defined. which is "imx-i2c". 2. Also checked argument in l4x_register_platform_device_callback() function are same as 'imx-i2c.dev', which mentioned on page 10 of the guide. 3. Added i2c driver ./l4linux/drivers/i2c/busses/i2c-imx.c Anything else I am missing? I appreciate any help from you guys. -Yunchuan
Hi, I realized I have make a mistake on i2c memory map and irq number. I corrected them, but still the same. Just update the infomation. IO | P6Device: l4linux "" IO | P6Device: (noname) "L40009" IO | P6Device: imx-i2c.dev "imx-i2c.2" IO | <0x145d0> IOMEM [000000021a8000-000000021abfff 4000] non-pref (3) IO | <0x14628> IRQ [00000000000046-00000000000046 1] none (32bit) () IO | Real Hardware ----------------------------------- IO | P6Device: System Bus "" IO | Hw::Device[System Bus] IO | P6Device: i2c "imx-i2c.2" IO | Hw::Device[i2c] IO | <0x145d0> IOMEM [000000021a8000-000000021abfff 4000] non-pref (3) IO | <0x14628> IRQ [00000000000046-00000000000046 1] none (32bit) () ..................... l4linux | Device scan: l4linux | Device: (noname) l4linux | Device: imx-i2c.dev l4linux | MEM: 021a8000 - 021abfff l4linux | IRQ: 00000046 - 00000046 l4linux | Device scan done. --yunchuan On 08/06/2014 12:43 PM, Yunchuan Geng wrote:
hi, L4 hackers and Taeung,
I am a newbie of L4Linux ,and I appreciate you share The_Guide_to_access_HW_on_L4Linux_v1.0.pdf through the following thread.
https://os.inf.tu-dresden.de/pipermail/l4-hackers/2014/006463.html
I followed the guide to access my i2c HW on Freescale i.MX6 Quad SABRE SD board. Got some progress, but still I can not have imx-i2c driver probe function called.
This is what I have achieved from the log.
The I2C device is registered to IO server IO | P6Device: l4linux "" IO | P6Device: (noname) "L40009" IO | P6Device: imx-i2c.dev "imx-i2c.2" IO | <0x145d0> IOMEM [000000021a8000-000000021a8fff 1000] non-pref (3) IO | <0x14628> IRQ [0000000000002e-0000000000002e 1] none (32bit) () IO | Real Hardware ----------------------------------- IO | P6Device: System Bus "" IO | Hw::Device[System Bus] IO | P6Device: i2c "imx-i2c.2" IO | Hw::Device[i2c] IO | <0x145d0> IOMEM [000000021a8000-000000021a8fff 1000] non-pref (3) IO | <0x14628> IRQ [0000000000002e-0000000000002e 1] none (32bit) ()
and the device is scaned by L4Linux
l4linux | Device scan: l4linux | Device: (noname) l4linux | Device: imx-i2c.dev l4linux | MEM: 021a8000 - 021a8fff l4linux | IRQ: 0000002e - 0000002e l4linux | Device scan done.
This is what I have modified. 1. Modified mach_setup.c file and double check device name is identical to that defined. which is "imx-i2c". 2. Also checked argument in l4x_register_platform_device_callback() function are same as 'imx-i2c.dev', which mentioned on page 10 of the guide. 3. Added i2c driver ./l4linux/drivers/i2c/busses/i2c-imx.c
Anything else I am missing?
I appreciate any help from you guys.
-Yunchuan
_______________________________________________ l4-hackers mailing list l4-hackers@os.inf.tu-dresden.de http://os.inf.tu-dresden.de/mailman/listinfo/l4-hackers
Hi L4 hackers, Finally, solved this problem myself. The device name should use that declared in platform_device_id in driver source. it was "imx1-i2c" or "imx21-i2c" rather than "imx-i2c". -Yunchuan On 08/06/2014 01:04 PM, Yunchuan Geng wrote:
Hi,
I realized I have make a mistake on i2c memory map and irq number. I corrected them, but still the same.
Just update the infomation.
IO | P6Device: l4linux "" IO | P6Device: (noname) "L40009" IO | P6Device: imx-i2c.dev "imx-i2c.2" IO | <0x145d0> IOMEM [000000021a8000-000000021abfff 4000] non-pref (3) IO | <0x14628> IRQ [00000000000046-00000000000046 1] none (32bit) () IO | Real Hardware ----------------------------------- IO | P6Device: System Bus "" IO | Hw::Device[System Bus] IO | P6Device: i2c "imx-i2c.2" IO | Hw::Device[i2c] IO | <0x145d0> IOMEM [000000021a8000-000000021abfff 4000] non-pref (3) IO | <0x14628> IRQ [00000000000046-00000000000046 1] none (32bit) ()
.....................
l4linux | Device scan: l4linux | Device: (noname) l4linux | Device: imx-i2c.dev l4linux | MEM: 021a8000 - 021abfff l4linux | IRQ: 00000046 - 00000046 l4linux | Device scan done.
--yunchuan
On 08/06/2014 12:43 PM, Yunchuan Geng wrote:
hi, L4 hackers and Taeung,
I am a newbie of L4Linux ,and I appreciate you share The_Guide_to_access_HW_on_L4Linux_v1.0.pdf through the following thread.
https://os.inf.tu-dresden.de/pipermail/l4-hackers/2014/006463.html
I followed the guide to access my i2c HW on Freescale i.MX6 Quad SABRE SD board. Got some progress, but still I can not have imx-i2c driver probe function called.
This is what I have achieved from the log.
The I2C device is registered to IO server IO | P6Device: l4linux "" IO | P6Device: (noname) "L40009" IO | P6Device: imx-i2c.dev "imx-i2c.2" IO | <0x145d0> IOMEM [000000021a8000-000000021a8fff 1000] non-pref (3) IO | <0x14628> IRQ [0000000000002e-0000000000002e 1] none (32bit) () IO | Real Hardware ----------------------------------- IO | P6Device: System Bus "" IO | Hw::Device[System Bus] IO | P6Device: i2c "imx-i2c.2" IO | Hw::Device[i2c] IO | <0x145d0> IOMEM [000000021a8000-000000021a8fff 1000] non-pref (3) IO | <0x14628> IRQ [0000000000002e-0000000000002e 1] none (32bit) ()
and the device is scaned by L4Linux
l4linux | Device scan: l4linux | Device: (noname) l4linux | Device: imx-i2c.dev l4linux | MEM: 021a8000 - 021a8fff l4linux | IRQ: 0000002e - 0000002e l4linux | Device scan done.
This is what I have modified. 1. Modified mach_setup.c file and double check device name is identical to that defined. which is "imx-i2c". 2. Also checked argument in l4x_register_platform_device_callback() function are same as 'imx-i2c.dev', which mentioned on page 10 of the guide. 3. Added i2c driver ./l4linux/drivers/i2c/busses/i2c-imx.c
Anything else I am missing?
I appreciate any help from you guys.
-Yunchuan
_______________________________________________ l4-hackers mailing list l4-hackers@os.inf.tu-dresden.de http://os.inf.tu-dresden.de/mailman/listinfo/l4-hackers
_______________________________________________ l4-hackers mailing list l4-hackers@os.inf.tu-dresden.de http://os.inf.tu-dresden.de/mailman/listinfo/l4-hackers
Hi, Taeung I find this document is very useful. https://www.dropbox.com/s/abj9ao5uk9r3w72/The_Guide_to_access_HW_on_L4Linux_... However it seems been removed from the link. Could you please check it or send me a copy privately? -Yunchuan On 08/06/2014 01:42 PM, Yunchuan Geng wrote:
Hi L4 hackers,
Finally, solved this problem myself. The device name should use that declared in platform_device_id in driver source. it was "imx1-i2c" or "imx21-i2c" rather than "imx-i2c".
-Yunchuan
On 08/06/2014 01:04 PM, Yunchuan Geng wrote:
Hi,
I realized I have make a mistake on i2c memory map and irq number. I corrected them, but still the same.
Just update the infomation.
IO | P6Device: l4linux "" IO | P6Device: (noname) "L40009" IO | P6Device: imx-i2c.dev "imx-i2c.2" IO | <0x145d0> IOMEM [000000021a8000-000000021abfff 4000] non-pref (3) IO | <0x14628> IRQ [00000000000046-00000000000046 1] none (32bit) () IO | Real Hardware ----------------------------------- IO | P6Device: System Bus "" IO | Hw::Device[System Bus] IO | P6Device: i2c "imx-i2c.2" IO | Hw::Device[i2c] IO | <0x145d0> IOMEM [000000021a8000-000000021abfff 4000] non-pref (3) IO | <0x14628> IRQ [00000000000046-00000000000046 1] none (32bit) ()
.....................
l4linux | Device scan: l4linux | Device: (noname) l4linux | Device: imx-i2c.dev l4linux | MEM: 021a8000 - 021abfff l4linux | IRQ: 00000046 - 00000046 l4linux | Device scan done.
--yunchuan
On 08/06/2014 12:43 PM, Yunchuan Geng wrote:
hi, L4 hackers and Taeung,
I am a newbie of L4Linux ,and I appreciate you share The_Guide_to_access_HW_on_L4Linux_v1.0.pdf through the following thread.
https://os.inf.tu-dresden.de/pipermail/l4-hackers/2014/006463.html
I followed the guide to access my i2c HW on Freescale i.MX6 Quad SABRE SD board. Got some progress, but still I can not have imx-i2c driver probe function called.
This is what I have achieved from the log.
The I2C device is registered to IO server IO | P6Device: l4linux "" IO | P6Device: (noname) "L40009" IO | P6Device: imx-i2c.dev "imx-i2c.2" IO | <0x145d0> IOMEM [000000021a8000-000000021a8fff 1000] non-pref (3) IO | <0x14628> IRQ [0000000000002e-0000000000002e 1] none (32bit) () IO | Real Hardware ----------------------------------- IO | P6Device: System Bus "" IO | Hw::Device[System Bus] IO | P6Device: i2c "imx-i2c.2" IO | Hw::Device[i2c] IO | <0x145d0> IOMEM [000000021a8000-000000021a8fff 1000] non-pref (3) IO | <0x14628> IRQ [0000000000002e-0000000000002e 1] none (32bit) ()
and the device is scaned by L4Linux
l4linux | Device scan: l4linux | Device: (noname) l4linux | Device: imx-i2c.dev l4linux | MEM: 021a8000 - 021a8fff l4linux | IRQ: 0000002e - 0000002e l4linux | Device scan done.
This is what I have modified. 1. Modified mach_setup.c file and double check device name is identical to that defined. which is "imx-i2c". 2. Also checked argument in l4x_register_platform_device_callback() function are same as 'imx-i2c.dev', which mentioned on page 10 of the guide. 3. Added i2c driver ./l4linux/drivers/i2c/busses/i2c-imx.c
Anything else I am missing?
I appreciate any help from you guys.
-Yunchuan
_______________________________________________ l4-hackers mailing list l4-hackers@os.inf.tu-dresden.de http://os.inf.tu-dresden.de/mailman/listinfo/l4-hackers
_______________________________________________ l4-hackers mailing list l4-hackers@os.inf.tu-dresden.de http://os.inf.tu-dresden.de/mailman/listinfo/l4-hackers
participants (3)
-
Peter Howard -
Taeung -
Yunchuan Geng