topic Re: BSP 13.4.1.04 android boot up issue in i.MX Processors

BSP 13.4.1.04 android boot up issue

johnhuang808 — Fri, 25 Oct 2013 12:50:29 GMT

I have created my own board based on imx6q. I downloaded BSP 13.4.1 from freescale, after that i pached the newest patch (13.4.1.04). My board boot up from eMMC. At the end of android booting up, my board printed out as bellow:

.......

init: starting 'dhcpcd_eth0'

eth0: Freescale FEC PHY driver [Generic PHY] (mii_bus:phy_addr=1:00, irq=-1)

ADDRCONF(NETDEV_UP): eth0: link is not ready

acc_open

acc_release

mtp_open

init: processing action 0x2c978 (property:sys.boot_completed=1)

init: command 'write' r=0

init: command 'write' r=-2

CPU3: shutdown

CPU2: shutdown

init: service 'bootanim' is being killed

init: waitpid returned pid 2385, status = 00000009

init: process 'bootanim', pid 2385 exited

init: waitpid returned pid 2453, status = 00000100

init: process 'dhcpcd_eth0', pid 2453 exited

request_suspend_state: sleep (0->3) at 87805217345 (1970-01-02 01:00:24.988134344 UTC)

US 921600

..............

it repeats the parrten "US 921600" again and again. My board connect to the computer through the usb port. On the computer's console terminal, i have the result as follow:

1. lsusb --> the result is: 18d1 : 2d02

2. adb devices --> the result is: the devices list attached is blank

So because I don't have adb access. I don't know how to continue debugging. Hope community can help me out. Thanks!!!

P/S: I also attached full console log with the thread.

Original Attachment has been moved to: 25Otc_3.txt.zip

Re: BSP 13.4.1.04 android boot up issue

raymondwang — Sat, 26 Oct 2013 08:47:30 GMT

It seems serial console does not display properly. You can add my patch in

kernel_imx/driver/tty/serial.imx.c . It rounded the possible baudrate to replace original

calculated baudrate because that may cause inaccurate baudrate which can cause serial

console display improperly.

static void __init

imx_console_get_options(struct imx_port *sport, int *baud,

int *parity, int *bits)

{

...

{

	* The next code provides exact computation of
	* baud_raw = round(((uartclk/16) * (ubir + 1)) / (ubmr + 1))
	* without need of float support or long long division,
	* which would be required to prevent 32bit arithmetic overflow
	*/
	unsigned int mul = ubir + 1;
	unsigned int div = 16 * (ubmr + 1);
	unsigned int rem = uartclk % div;

	baud_raw = (uartclk / div) * mul;
	baud_raw += (rem * mul + div / 2) / div;
	baud = (baud_raw + 50) / 100 100;

//mapping to nearest baudrate to reduce bad output
{
	int i,count;
	unsigned left,cur,compared;
	unsigned baud_maps[]={
		50, 75, 110,134,150,200,300,600,1200,1800,2400,
		4800,9600,19200,38400,57600,115200,230400,460800,
		500000,576000,921600,1000000,1152000,1500000,2000000,
		2500000,3000000,3500000,4000000,
	};
	count = (sizeof(baud_maps)/sizeof(baud_maps[0]));
	compared = *baud;
	for(i=0;i<count;i++){
		if(baud_maps[i]>compared)
			break;
	}
	//only cover we wanted baudrate
	if(i<count){
		unsigned delta1,delta2;
		left = baud_maps[i-1];
		cur = baud_maps[i];
		delta1 = compared-left;
		delta2 = cur-compared;
		compared = (delta1>delta2)?cur:left;
		*baud=compared;
	}
}

}

BTW,you can add below command to enable adbd in default.

# Dsiable adb security for JB4.2.2

setprop ro.adb.secure 0

Re: BSP 13.4.1.04 android boot up issue

johnhuang808 — Sat, 26 Oct 2013 09:03:54 GMT

Thanks raymond

In the console log, after the kernel starting, i found that my board printed out as bellow:

......

NR_IRQS:496

MXC GPIO hardware

sched_clock: 32 bits at 3000kHz, resolution 333ns, wraps every 1431655ms

Set periph_clk's parent to pll2_pfd_400M!

....

So periph change to 400M instead of defaut 528MHz. Perhaps it cause my problem. I will try to apply your patch and report the result soon.

Re: BSP 13.4.1.04 android boot up issue

johnhuang808 — Fri, 01 Nov 2013 05:43:09 GMT

Hi raymond,

I just try to apply your patch, and the issue still occur. Now i still have no clue for this issue.

About the adb, i change my default.prop in ramdisk as bellow:

# ADDITIONAL_DEFAULT_PROPERTIES

ro.secure=0

ro.allow.mock.location=1

ro.debuggable=1

persist.sys.usb.config=mtp,adb

Now i can access my board via adb fine.