About module priority
Hi folks, I am writing a kernel module for a sd card, but when I insert a sd card into my box, the default sd driver will probe before my driver, and my driver will never have chance to probe. Is there any method to make my driver probe the sd card before the default sd driver? Thanks in advance.
Hi Geraint, On Thu, Apr 19, 2012 at 2:05 PM, Geraint Yang <geraint0923@gmail.com> wrote:
Hi folks, I am writing a kernel module for a sd card, but when I insert a sd card into my box, the default sd driver will probe before my driver, and my driver will never have chance to probe. Is there any method to make my driver probe the sd card before the default sd driver?
Why can't you disable the default sd card driver in your .config? Thanks in advance.
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Hi Arun, Thanks for your reply. I have ever thought about this method, but my sd driver is only for my own special sd card which is not the common sd card and my driver could not deal with the common sd card. So I need the default sd driver for other common sd cards. I hope that mmc core could let my driver probe first, if the sd card is my special one, my driver will operate it in my own way, otherwise mmc core will call the prob function of the default sd driver then. On Thu, Apr 19, 2012 at 9:50 PM, Arun KS <getarunks@gmail.com> wrote:
Hi Geraint,
On Thu, Apr 19, 2012 at 2:05 PM, Geraint Yang <geraint0923@gmail.com>wrote:
Hi folks, I am writing a kernel module for a sd card, but when I insert a sd card into my box, the default sd driver will probe before my driver, and my driver will never have chance to probe. Is there any method to make my driver probe the sd card before the default sd driver?
Why can't you disable the default sd card driver in your .config?
Thanks in advance.
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-- Geraint Yang Tsinghua University Department of Computer Science and Technology
Hi, For what platform are you building this. Don't u have access to build the whole kernel for the same? If so, then u can follow what Arun said. While building the kernel, just do not build sd card in built driver that will ensure to call ur module. Sent from my iPhone On 19-Apr-2012, at 7:46 PM, Geraint Yang <geraint0923@gmail.com> wrote:
Hi Arun,
Thanks for your reply.
I have ever thought about this method, but my sd driver is only for my own special sd card which is not the common sd card and my driver could not deal with the common sd card. So I need the default sd driver for other common sd cards.
I hope that mmc core could let my driver probe first, if the sd card is my special one, my driver will operate it in my own way, otherwise mmc core will call the prob function of the default sd driver then.
On Thu, Apr 19, 2012 at 9:50 PM, Arun KS <getarunks@gmail.com> wrote: Hi Geraint,
On Thu, Apr 19, 2012 at 2:05 PM, Geraint Yang <geraint0923@gmail.com> wrote: Hi folks, I am writing a kernel module for a sd card, but when I insert a sd card into my box, the default sd driver will probe before my driver, and my driver will never have chance to probe. Is there any method to make my driver probe the sd card before the default sd driver?
Why can't you disable the default sd card driver in your .config?
Thanks in advance.
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-- Geraint Yang Tsinghua University Department of Computer Science and Technology
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Sorry missed ur whole details. In that case, u modify the existing driver and call ur part of ur code from common probe depending on ur special condition otherwise keep the existing flow. Sent from my iPhone On 19-Apr-2012, at 7:46 PM, Geraint Yang <geraint0923@gmail.com> wrote:
Hi Arun,
Thanks for your reply.
I have ever thought about this method, but my sd driver is only for my own special sd card which is not the common sd card and my driver could not deal with the common sd card. So I need the default sd driver for other common sd cards.
I hope that mmc core could let my driver probe first, if the sd card is my special one, my driver will operate it in my own way, otherwise mmc core will call the prob function of the default sd driver then.
On Thu, Apr 19, 2012 at 9:50 PM, Arun KS <getarunks@gmail.com> wrote: Hi Geraint,
On Thu, Apr 19, 2012 at 2:05 PM, Geraint Yang <geraint0923@gmail.com> wrote: Hi folks, I am writing a kernel module for a sd card, but when I insert a sd card into my box, the default sd driver will probe before my driver, and my driver will never have chance to probe. Is there any method to make my driver probe the sd card before the default sd driver?
Why can't you disable the default sd card driver in your .config?
Thanks in advance.
_______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
-- Geraint Yang Tsinghua University Department of Computer Science and Technology
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To modify the common prob, I need to rebuild the common driver, but the driver I am develop is not just for myself, I could ask everyone who will use this specail sd card to rebuild their driver(or kernel). So is it possible to modify the priority of prob just calling some existing kernel APIs? On Thu, Apr 19, 2012 at 10:40 PM, Tirtha Ghosh <gtirtha@gmail.com> wrote:
Sorry missed ur whole details. In that case, u modify the existing driver and call ur part of ur code from common probe depending on ur special condition otherwise keep the existing flow.
Sent from my iPhone
On 19-Apr-2012, at 7:46 PM, Geraint Yang <geraint0923@gmail.com> wrote:
Hi Arun,
Thanks for your reply.
I have ever thought about this method, but my sd driver is only for my own special sd card which is not the common sd card and my driver could not deal with the common sd card. So I need the default sd driver for other common sd cards.
I hope that mmc core could let my driver probe first, if the sd card is my special one, my driver will operate it in my own way, otherwise mmc core will call the prob function of the default sd driver then.
On Thu, Apr 19, 2012 at 9:50 PM, Arun KS <getarunks@gmail.com> wrote:
Hi Geraint,
On Thu, Apr 19, 2012 at 2:05 PM, Geraint Yang <geraint0923@gmail.com>wrote:
Hi folks, I am writing a kernel module for a sd card, but when I insert a sd card into my box, the default sd driver will probe before my driver, and my driver will never have chance to probe. Is there any method to make my driver probe the sd card before the default sd driver?
Why can't you disable the default sd card driver in your .config?
Thanks in advance.
_______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
-- Geraint Yang Tsinghua University Department of Computer Science and Technology
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-- Geraint Yang Tsinghua University Department of Computer Science and Technology
I doubt if this is possible between built-in drivers and modules. The way u r thinking might not work properly as even if ur driver probed first how would u stop probing the common one. Once that will be probed it will mess with ur settings. As these drivers are for same devices u must have common logic to separate these out. I m not familiar with mmc drivers, might have some other way to implement. Sent from my iPhone On 19-Apr-2012, at 8:38 PM, Geraint Yang <geraint0923@gmail.com> wrote:
To modify the common prob, I need to rebuild the common driver, but the driver I am develop is not just for myself, I could ask everyone who will use this specail sd card to rebuild their driver(or kernel).
So is it possible to modify the priority of prob just calling some existing kernel APIs?
On Thu, Apr 19, 2012 at 10:40 PM, Tirtha Ghosh <gtirtha@gmail.com> wrote: Sorry missed ur whole details. In that case, u modify the existing driver and call ur part of ur code from common probe depending on ur special condition otherwise keep the existing flow.
Sent from my iPhone
On 19-Apr-2012, at 7:46 PM, Geraint Yang <geraint0923@gmail.com> wrote:
Hi Arun,
Thanks for your reply.
I have ever thought about this method, but my sd driver is only for my own special sd card which is not the common sd card and my driver could not deal with the common sd card. So I need the default sd driver for other common sd cards.
I hope that mmc core could let my driver probe first, if the sd card is my special one, my driver will operate it in my own way, otherwise mmc core will call the prob function of the default sd driver then.
On Thu, Apr 19, 2012 at 9:50 PM, Arun KS <getarunks@gmail.com> wrote: Hi Geraint,
On Thu, Apr 19, 2012 at 2:05 PM, Geraint Yang <geraint0923@gmail.com> wrote: Hi folks, I am writing a kernel module for a sd card, but when I insert a sd card into my box, the default sd driver will probe before my driver, and my driver will never have chance to probe. Is there any method to make my driver probe the sd card before the default sd driver?
Why can't you disable the default sd card driver in your .config?
Thanks in advance.
_______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
-- Geraint Yang Tsinghua University Department of Computer Science and Technology
_______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
-- Geraint Yang Tsinghua University Department of Computer Science and Technology
Hi, On Thu, 2012-04-19 at 20:10 +0530, Tirtha Ghosh wrote:
Sorry missed ur whole details. In that case, u modify the existing driver and call ur part of ur code from common probe depending on ur special condition otherwise keep the existing flow.
There could be couple of ways: 1. If you have access to the kernel and going to flash the same on your mobile, then you can modify the common probe of the SD card subsystem and let it call your driver depending on the card and default driver in case of other card. This will hold true if you can differentiate between the cards. 2. If you dont have kernel sources then you can remove the default driver temporarily while your SD card is in place and load it later. You may need another module to do this. This will work in a scenario where you just have one slot for SD Card.
Sent from my iPhone
On 19-Apr-2012, at 7:46 PM, Geraint Yang <geraint0923@gmail.com> wrote:
Hi Arun,
Thanks for your reply.
I have ever thought about this method, but my sd driver is only for my own special sd card which is not the common sd card and my driver could not deal with the common sd card. So I need the default sd driver for other common sd cards.
I hope that mmc core could let my driver probe first, if the sd card is my special one, my driver will operate it in my own way, otherwise mmc core will call the prob function of the default sd driver then.
On Thu, Apr 19, 2012 at 9:50 PM, Arun KS <getarunks@gmail.com> wrote: Hi Geraint,
On Thu, Apr 19, 2012 at 2:05 PM, Geraint Yang <geraint0923@gmail.com> wrote: Hi folks, I am writing a kernel module for a sd card, but when I insert a sd card into my box, the default sd driver will probe before my driver, and my driver will never have chance to probe. Is there any method to make my driver probe the sd card before the default sd driver?
Why can't you disable the default sd card driver in your .config?
Thanks in advance.
_______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
-- Geraint Yang Tsinghua University Department of Computer Science and Technology
_______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
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participants (4)
-
Abhijit Pawar -
Arun KS -
Geraint Yang -
Tirtha Ghosh