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    SubjectRe: [PATCH] atmel_serial: Fix break handling
    On Tue, 5 Jun 2007 13:23:36 +0200
    Haavard Skinnemoen wrote:

    > On Tue, 5 Jun 2007 14:07:20 +0300
    > Ivan Kuten <ivan.kuten@promwad.com> wrote:
    >
    > > I tried to test your patch on AT91RM9200 with Magic SysRq sequence, unfortunately without
    > > success - SysRq still does not work. You mention "break count increments" where do you check it ? I have
    > > cat /proc/tty/driver/atmel_serial
    > > serinfo:1.0 driver revision:
    > > 0: uart:ATMEL_SERIAL mmio:0xFEFFF200 irq:1 tx:8554 rx:623 fe:25 RTS|CTS|DTR|DSR|CD|RI
    > > 1: uart:ATMEL_SERIAL mmio:0xFFFC0000 irq:6 tx:0 rx:0 CTS|DSR|CD|RI
    > > 2: uart:ATMEL_SERIAL mmio:0xFFFC4000 irq:7 tx:0 rx:0 RI
    > > 3: uart:ATMEL_SERIAL mmio:0xFFFC8000 irq:8 tx:0 rx:0 DSR|CD|RI
    > > 4: uart:ATMEL_SERIAL mmio:0xFFFCC000 irq:9 tx:0 rx:0 CTS|DSR|CD|RI
    > >
    > > no any break counter.
    >
    > Andrew Victor pointed out that the RM9200 DBGU doesn't support break at
    > all, and the data sheet seems to agree. The break counter seems to show
    > up after the first break has been received and you're probably not
    > receiving any.
    >
    > Is it possible for you to try a different USART as console?
    >
    > Haavard

    Hi Haavard,

    I tried /dev/ttyAT3, break appeared but not the way I expected, after: stty -F /dev/ttyAT3 brkint
    I get:

    cat /proc/tty/driver/atmel_serial
    serinfo:1.0 driver revision:
    0: uart:ATMEL_SERIAL mmio:0xFEFFF200 irq:1 tx:0 rx:0 CTS|DSR|CD|RI
    1: uart:ATMEL_SERIAL mmio:0xFFFC0000 irq:6 tx:0 rx:0 CTS|DSR|CD|RI
    2: uart:ATMEL_SERIAL mmio:0xFFFC4000 irq:7 tx:0 rx:0 RI
    3: uart:ATMEL_SERIAL mmio:0xFFFC8000 irq:8 tx:1530 rx:115 brk:1 RTS|DTR|DSR|CD|RI
    4: uart:ATMEL_SERIAL mmio:0xFFFCC000 irq:9 tx:0 rx:0 DSR|CD|RI

    brk is 1 not depending on how many breaks was sent. May be I missunderstood "break" meaning?
    I use from minicom: Main Functions : send break.........F .

    I inserted printk:

    /*
    * Control the transmission of a break signal
    */
    static void atmel_break_ctl(struct uart_port *port, int break_state)
    {
    printk(KERN_EMERG "atmel_break_ctl break_state %d", break_state);
    if (break_state != 0)
    UART_PUT_CR(port, ATMEL_US_STTBRK); /* start break */
    else
    UART_PUT_CR(port, ATMEL_US_STPBRK); /* stop break */
    }

    it's also not shown.

    BR,
    Ivan
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