cat problem in tiny_tty driver (the source included)

I tried to check cat operations for tiny_tty driver from LDD book. What is wrong with cat operation here? Here is the output from strace cat hello > /dev/my_tty1 [EMAIL PROTECTED]:/home# strace cat hello > /dev/my_tty1 execve("/bin/cat", ["cat", "hello"], [/* 12 vars */]) = 0 brk(0)

Re: cat problem in tiny_tty driver (the source included)

Thank you very much for you help. BTW, for cat < /dev/my_tty1 can see here something wrong? as I understand tiny_timer function sends data to tty level by calling tty_flip_buffer_push(tty). Is this enough to support cat < /dev/my_tty1? >On Wed, Feb 21, 2007 at 06:03:16PM +0300, Mock

Re: cat problem in tiny_tty driver (the source included)

cat < /dev/my_tty does nothing, just stopped for reading. I tried to send a data, but there was no respond, just waiting. >On Wed, Feb 21, 2007 at 10:33:52PM +0300, Mockern wrote: >> Thank you very much for you help. >> >> BTW, for cat < /dev/my_tty1 can see he

cat reading problem

Hello, I tried to cat < /dev/mytty/ttyS3, but cat shows nothing. I attached here strace cat < /dev/mytty/ttyS3 and cat < hello. Hello is just a file. As you can see the result of strace cat is identical, but in tty case I can't see nothing. Why does cat write nothing at my console? Thank y

Re: bloc_til_ready in tty driver

Thanx for your respond, I did not implement this function in my tty driver. Does it help to work my driver with cat Linux operation? (e.g. cat < ttyS10) >Mockern napsal(a): >> What for is "bloc_til_ready" function in tty drivers? > >Most drivers waits for hardwa

Re: cat, cp operations for tty driver (like for char one)

Thanx for your respond. Does it mean I have to change nothing in my tty driver (based on serial_core.c) to use: cat and cp? No "nonstandard " special functions to implement? > >On Thu, 15 Feb 2007, Mockern wrote: > >> I have a question about linux tty driver >

Re: cat, cp operations for tty driver (like for char one)

Thank you very much >On Fri, 16 Feb 2007, Mockern wrote: > >> Thanx for your respond. >> >> Does it mean I have to change nothing in my tty driver >> (based on serial_core.c) to use: cat and cp? No "nonstandard " special >> functions to implement

Re: bloc_til_ready in tty driver

Thank you very much >Mockern napsal(a): >> Thanx for your respond, >> >> I did not implement this function in my tty driver. >> >> Does it help to work my driver with cat Linux operation? >> (e.g. cat < ttyS10) > >Help in which way? If you hav

Linux tty driver question

Hi, I'm working on Linux tty driver (based on tiny_tty). How can I provide in my driver Linux cat operation (e.g.cat < ttyS3)? What should I implement exactly? Thankx - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More maj

Re: Linux tty driver question

Thank you, I have no problem with my tty driver, except one thing: it does not work with cat (but there are no problems to write,read from user space application). I'll try to follow your adwise to support cat. >Mockern napsal(a): >> Hi, >> >> I'm workin

Re: Linux tty driver question

The problem is (probably???) that I did not implement ready_til_block in my driver. OK, thank you, i need to investigate it with strace. >Mockern napsal(a): >> Thank you, >> >> I have no problem with my tty driver, except one thing: it does not work >> with cat (b

Re: buffer overflows in the tty flip buffer in 2.6.17

Thanx for your respond. Could you please inform me what patches exactly you have grabbed? >On Sat, Feb 17, 2007 at 03:29:31PM +0300, Mockern wrote: >> When data is received from the hardware, it needs to be placed into the tty >> device's flip buffer. This can be done with

Re: Analog-to-Digital Converter (ADC) driver

AD7994 4 Channel, 12-Bit ADC with I2C Compatible Interface in 16-Lead TSSOP, I think it could be I2C driver >>On 2/17/07, Mockern <[EMAIL PROTECTED]> wrote: >>> Hello, >>> >>> Where I can find any ADC driver example? >>> >> >>D

Re: Analog-to-Digital Converter (ADC) driver

AD7994 4 Channel, 12-Bit ADC with I2C Compatible Interface in 16-Lead TSSOP, I think it could be I2C driver >On 2/17/07, Mockern <[EMAIL PROTECTED]> wrote: >> Hello, >> >> Where I can find any ADC driver example? >> > >Depending on what kind of ADC and

ADC driver with I2C interface

Hello, Where I can grab an example of ADC driver with I2C interface? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.or

Re: serial and tty driver

-0600, Paul Fulghum wrote: >> Mockern wrote: >> >I have a question, what is really difference between serial and tty >> >drivers? >> > >> >As I understand tty is high level and communicates with user space. >> >> The serial core implements many

Re: ADC driver with I2C interface

Thank you, I'll take a look. > >did you tried www.comedi.org ? > >Am Sunday 18 February 2007 00:18 schrieb Mockern: >> Hello, >> >> Where I can grab an example of ADC driver with I2C interface? >> - >> To unsubscribe from this list: send the line

APM driver

Hello, I need to send a battery info status from my driver to Linux APM driver. How can I do it? Thank you - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html P

apm_get_power_status question

Hello, I need to send data from my driver to apm driver, I want to use apm_get_power_status function for getting here my battery ststus info. But I have found this function has no implementation. thank you - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a

Re: how to limit flip buffer size in tty driver?

300 (MSK) >"Mockern" <[EMAIL PROTECTED]> wrote: > >> Hello, >> >> how to limit flip buffer size in tty driver? > >You don't. > >See Documentation/tty.txt and throttle/unthrottle > >Alan -- Сегодня удачный день, чтобы завести почту на Я

block_til_ready

Hi, What is the simpliest implementation of block_til_ready for tty driver? Thanks, Andy - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ

Problem: cat < /dev/my_ttyS0 is not blocked

Hi, I have a problem with cat < /dev/my_ttyS0 (see strace output below). cat function is not blocked. I don't understand why it is not stopped at read(0, __ and terminated? Thank you -- execve("/bin/cat", ["cat"], [/

Question: Where tty layer keeps termios data?

Hi, Could someone please to help with next question: Where Linux (or maybe tty layer) keeps termios data? If I run stty command, where stty gets current termios settings? Thank you - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTE

problem: init_termios = tty_std_termios;

Hi, I just added "mydriver_tty_driver->init_termios = tty_std_termios" to my init driver function. Problem: But now I can't see data at user level application. It looks like flip_buffer needs to get termination character(or new line character) to push data to high level. Which character sho

Question: half-duplex and full-duplex serial driver

Hi, Could you help me please, how can my serial driver to work in half-duplex and full-duplex mode? Thank you - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.htm

Question: 20 microseconds delay

Hi, I have a question. I need to use 20 microsecond delay in my driver. What exact jiffies value I should define to get 20 microseconds? Thank you - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http:

Re: Question: 20 microseconds delay

The problem is that I need to use wait_event_timeout function. >Mockern napsal(a): >> Hi, >> >> I have a question. >> >> I need to use 20 microsecond delay in my driver. >> What exact jiffies value I should define to get 20 microseconds? > >It

Re: Question: 20 microseconds delay

The problem is that I need to use wait_event_timeout function >Am Samstag 03 Mдrz 2007 15:20 schrieb Mockern: >> Hi, >> >> I have a question. >> >> I need to use 20 microsecond delay in my driver. >> What exact jiffies value I should define to get 20 micros

kernel threads locking data

hi, how is better to lock data (a buffer) which is used by 2 kernel threads? thank you - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at

Problem: Kernel oops

Hi, I have the Linux kernel oops problem sometime. How can I fix it? Thank you - Unable to handle kernel NULL pointer dereference at virtual address 0004 pgd = c0004000 [0004] *pgd= Internal error: Oop

Question: Watchdog driver for the SA11x0/PXA2xx

hi, Could someone explain me please, do I need sa1100_wdt.c in my Linux box? What is the main goal of this driver? Thank you - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/ma

timeout = 1 millisecond for wait_event_timeout

Hi, I have a question. How can I make timeout = 1 millisecond for wait_event_timeout function? Something like (HZ/1000)*x? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majord

Problem: how to make kernel thread more faster?

hi, Is there a way how to make kernel thread more faster? I put some of my code to the kthread, but I noticed that kthread sends data more slow than original driver without kthread. Thank you - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to

Question: schedule()

Hi, What does schedule() function do? I want to make my kthread preemptive. Thanks - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at htt