Hi Sweta,
how about returning the bad board to TI and requesting a replacement unit
;-).
Sorry, but I don't have a solution.
Ciao,
Peter
On Fri, 29 Dec 2006, Sweta wrote:
> Hi Peter,
> I tried with the same code but it didn't work.
> Then I came to know that there is a slicon bug so it doesn't actually
> reset the processor through watchdog.
> Then I tried with the workaround which is the code I mentioned in
> previous mail.
> Perviously on one of the board it was working but on other board, same
> kernel image doesn't perform reboot.
> So what can be the solution ?
>
> Thanks,
> Sweta
>
> Peter Wippich wrote:
>
> Hi Sweta,
>
> here is the code from the 2.6.19 kernel. Maybe this helps :
>
> void davinci_watchdog_reset(void) {
> volatile davinci_timer_regs_t *davinci_wdt =
> (volatile davinci_timer_regs_t *)IO_ADDRESS(DAVINCI_WDOG_BASE);
>
> davinci_wdt->tcr = 0x0; /* disable timer */
> davinci_wdt->tgcr = 0x0; /* reset timer */
> davinci_wdt->tgcr = 0x8; /* configure timer2 as 64-bit */
> davinci_wdt->tgcr |= 0x3; /* release timer from reset */
> davinci_wdt->tim12 = 0; /* clear counter and period regs */
> davinci_wdt->tim34 = 0;
> davinci_wdt->prd12 = 0;
> davinci_wdt->prd34 = 0;
> davinci_wdt->wdtcr |= 0x4000; /* enable watchdog timer */
>
> /* put watchdog in pre-active state */
> davinci_wdt->wdtcr = 0xA5C64000;
>
> /* put watchdog in active state */
> davinci_wdt->wdtcr = 0xDA7E4000;
>
> /* write an invalid value to the WDKEY field to trigger
> * a watchdog reset */
> davinci_wdt->wdtcr = 0x00004000;
> }
>
>
> On Fri, 29 Dec 2006, [EMAIL PROTECTED] wrote:
>
>
>
> Hi Peter,
> I m using Montavista Linux 2.6.10 (mvl402).
> reboot code as mentioned in mail is executed properly.but then after
> this line davinci_wdt->wdtcr = 0x00004000;, it doesn't execute next
> statement (I tried with putting printk statement after it).
> Doe it mean that it resets watchdog correctly.
> But then it doesn't reset the processor & doesn't start execution of UBL
> code again.
> What can be the problem ?
> Thanks,
> Sweta
>
>
> Hi Sweta,
>
> which kernel are you using ?? It works with the 2.6.19 Kernel from GIT
> tree.
>
> Ciao,
>
> Peter
>
> On Thu, 28 Dec 2006, [EMAIL PROTECTED] wrote:
>
>
>
> Hi All,
> I want to reset the Davinci pocessor using watchdog timer.
> So when I give reboot command from kernel, it hangs & doesn't actually
> reset the processor.
> code for watchdog rest in kernel is as follows :
> void davinci_watchdog_reset(void) {
> volatile davinci_timer_regs_t *davinci_wdt = (volatile
> davinci_timer_regs_t *)IO_ADDRESS(DAVINCI_WDOG_BASE);
> davinci_wdt->tcr = 0x0; /* disable timer */
> davinci_wdt->tgcr = 0x0; /* reset timer */
> davinci_wdt->tgcr = 0x8; /* configure timer2 as 64-bit */
> davinci_wdt->tgcr |= 0x3; /* release timer from reset */
> davinci_wdt->tim12 = 0; /* clear counter and period regs
> */
> davinci_wdt->tim34 = 0;
> davinci_wdt->prd12 = 0;
> davinci_wdt->prd34 = 0;
> davinci_wdt->tcr |= 0x00000040;
> davinci_wdt->wdtcr |= 0x4000; /* enable watchdog timer */
>
> *(volatile unsigned int *)(0x01c41a20) = 0x00000000;
>
> /* put watchdog in pre-active state */
> davinci_wdt->wdtcr = 0xA5C64000;
>
> /* put watchdog in active state */
> davinci_wdt->wdtcr = 0xDA7E4000;
>
> /* write an invalid value to the WDKEY field to trigger* a
> watchdog
> reset */
> davinci_wdt->wdtcr = 0x00004000;
>
> }
>
> But it hangs & doesn't actually reset the processor.
> I tried with reset commnad from u-boot loader also. It also gives me the
> same result.
> Can anyone Help me out to debug what is wrong ?
>
> Thanks in advance,
> -Sweta
>
>
>
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