FAQ: [#6647] bf561-ezkit SMP kernel sometimes can't wake up from standby mode through uart(2011)

Document created by Aaronwu Employee on Sep 11, 2013
Version 1Show Document
  • View in full screen mode

[#6647] bf561-ezkit SMP kernel sometimes can't wake up from standby mode through uart

Submitted By: Vivi Li

Open Date

2011-06-15 06:33:52     Close Date

2011-07-24 23:10:27

Priority:

Medium     Assignee:

steven miao

Status:

Closed     Fixed In Release:

N/A

Found In Release:

2011R1     Release:

Category:

N/A     Board:

N/A

Processor:

BF561     Silicon Revision:

Is this bug repeatable?:

Yes     Resolution:

Out of Date

Uboot version or rev.:

    Toolchain version or rev.:

gcc4.3-2010_Dec_09

App binary format:

N/A     

Summary: bf561-ezkit SMP kernel sometimes can't wake up from standby mode through uart

Details:

 

On bf561-ezkit SMP kernel, can't wake up from standby mode through uart sometimes.

 

--

Linux version 2.6.39.1-ADI-2011R1-pre-svn9931 (test@uclinux65-561-SMP) (gcc version 4.3.5 (ADI-trunk/svn-5013) ) #6 SMP Tue Jun 1

register early platform devices

bootconsole [early_shadow0] enabled

bootconsole [early_BFuart0] enabled

early printk enabled on early_BFuart0

Board Memory: 64MB

Kernel Managed Memory: 60MB

Memory map:

  fixedcode = 0x00000400-0x00000490

  text      = 0x00001000-0x001313f0

  rodata    = 0x00131400-0x0018c5d4

  bss       = 0x0018d000-0x0019f288

  data      = 0x0019f2a0-0x001b2000

    stack   = 0x001b0000-0x001b2000

  init      = 0x001b2000-0x00707000

  available = 0x00707000-0x03b00000

  DMA Zone  = 0x03b00000-0x03c00000

Hardware Trace active and enabled

Boot Mode: 0

Blackfin support (C) 2004-2010 Analog Devices, Inc.

Compiled for ADSP-BF561 Rev 0.5

Blackfin Linux support by http://blackfin.uclinux.org/

Processor Speed: 600 MHz core clock and 100 MHz System Clock

NOMPU: setting up cplb tables

NOMPU: setting up cplb tables

Instruction Cache Enabled for CPU0

  External memory: cacheable in instruction cache

  L2 SRAM        : uncacheable in instruction cache

Data Cache Enabled for CPU0

  External memory: cacheable (write-through) in data cache

  L2 SRAM        : uncacheable in data cache

PERCPU: Embedded 7 pages/cpu @0078c000 s4480 r8192 d16000 u32768

Built 1 zonelists in Zone order, mobility grouping off.  Total pages: 14986

Kernel command line: root=/dev/mtdblock0 rw clkin_hz=30000000 earlyprintk=serial,uart0,57600 console=ttyBF0,57600 mem=60M max_mef

PID hash table entries: 256 (order: -2, 1024 bytes)

Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)

Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)

Memory available: 52580k/61440k RAM, (5460k init code, 1216k kernel code, 516k data, 1024k dma, 644k reserved)

Hierarchical RCU implementation.

NR_IRQS:153

Configuring Blackfin Priority Driven Interrupts

console [ttyBF0] enabled, bootconsole disabled

console [ttyBF0] enabled, bootconsole disabled

Calibrating delay loop... 1185.79 BogoMIPS (lpj=2371584)

pid_max: default: 32768 minimum: 301

Mount-cache hash table entries: 512

Booting Core B.

Brought up 2 CPUs

Instruction Cache Enabled for CPU1

  External memory: cacheable in instruction cache

  L2 SRAM        : uncacheable in instruction cache

Data Cache Enabled for CPU1

  External memory: cacheable (write-through) in data cache

  L2 SRAM        : uncacheable in data cache

SMP: Total of 2 processors activated (0.00 BogoMIPS).

Blackfin Scratchpad data SRAM: 4 KB

Blackfin Scratchpad data SRAM: 4 KB

Blackfin L1 Data A SRAM: 16 KB (16 KB free)

Blackfin L1 Data A SRAM: 16 KB (16 KB free)

Blackfin L1 Data B SRAM: 16 KB (16 KB free)

Blackfin L1 Data B SRAM: 16 KB (16 KB free)

Blackfin L1 Instruction SRAM: 16 KB (15 KB free)

Blackfin L1 Instruction SRAM: 16 KB (15 KB free)

Blackfin L2 SRAM: 128 KB (127 KB free)

NET: Registered protocol family 16

Blackfin DMA Controller

ezkit_init(): registering device resources

bio: create slab <bio-0> at 0

bfin-spi bfin-spi.0: Blackfin on-chip SPI Controller Driver, Version 1.0, regs_base@ffc00500, dma channel@16

NET: Registered protocol family 2

IP route cache hash table entries: 1024 (order: 0, 4096 bytes)

TCP established hash table entries: 2048 (order: 2, 16384 bytes)

TCP bind hash table entries: 2048 (order: 2, 16384 bytes)

TCP: Hash tables configured (established 2048 bind 2048)

TCP reno registered

UDP hash table entries: 128 (order: 0, 4096 bytes)

UDP-Lite hash table entries: 128 (order: 0, 4096 bytes)

NET: Registered protocol family 1

debug-mmrs: setting up Blackfin MMR debugfs

msgmni has been set to 102

io scheduler noop registered (default)

bfin-uart: Blackfin serial driver

bfin-uart.0: ttyBF0 at MMIO 0xffc00400 (irq = 35) is a BFIN-UART

brd: module loaded

physmap platform flash device: 00800000 at 20000000

physmap-flash.0: Found 1 x16 devices at 0x0 in 16-bit bank. Manufacturer ID 0x000020 Chip ID 0x0022ed

Amd/Fujitsu Extended Query Table at 0x0040

  Amd/Fujitsu Extended Query version 1.3.

physmap-flash.0: Swapping erase regions for top-boot CFI table.

number of CFI chips: 1

RedBoot partition parsing not available

Using physmap partition information

Creating 5 MTD partitions on "physmap-flash.0":

0x000000000000-0x000000040000 : "bootloader(nor)"

0x000000040000-0x000000200000 : "linux kernel(nor)"

0x000000200000-0x0000007f0000 : "file system(nor)"

0x0000007f0000-0x0000007fe000 : "config(nor)"

0x0000007fe000-0x000000800000 : "u-boot env(nor)"

smc91x.c: v1.1, sep 22 2004 by Nicolas Pitre <nico@fluxnic.net>

eth0: SMC91C11xFD (rev 2) at 2c010300 IRQ 82 [nowait]

eth0: Ethernet addr: 00:e0:22:fe:ba:2a

bfin-wdt: initialized: timeout=20 sec (nowayout=0)

TCP cubic registered

NET: Registered protocol family 17

smc91x smc91x.0: eth0: link down

IP-Config: Complete:

     device=eth0, addr=10.100.4.50, mask=255.255.255.0, gw=10.100.4.174,

     host=bf561-ezkit, domain=, nis-domain=(none),

     bootserver=10.100.4.174, rootserver=10.100.4.174, rootpath=

Freeing unused kernel memory: 5460k freed

smc91x smc91x.0: eth0: link up, 100Mbps, full-duplex, lpa 0x41E1

                           _____________________________________

        a8888b.           / Welcome to the uClinux distribution \

       d888888b.         /       _     _                         \

       8P"YP"Y88        /       | |   |_|            __  __ (TM)  |

       8|o||o|88  _____/        | |    _ ____  _   _ \ \/ /       |

       8'    .88       \        | |   | |  _ \| | | | \  /        |

       8`._.' Y8.       \       | |__ | | | | | |_| | /  \        |

      d/      `8b.       \      \____||_|_| |_|\____|/_/\_\       |

     dP   .    Y8b.       \   For embedded processors including   |

    d8:'  "  `::88b        \    the Analog Devices Blackfin      /

   d8"         'Y88b        \___________________________________/

  :8P    '      :888

   8a.   :     _a88P         For further information, check out:

._/"Yaa_:   .| 88P|            - http://blackfin.uclinux.org/

\    YP"    `| 8P  `.          - http://docs.blackfin.uclinux.org/

/     \.___.d|    .'           - http://www.uclinux.org/

`--..__)8888P`._.'  jgs/a:f    - http://www.analog.com/blackfin

 

Have a lot of fun...

 

 

BusyBox v1.18.4 (2011-06-14 15:58:16 GMT) hush - the humble shell

 

root:/> echo enabled > /sys/class/tty/ttyBF0/power/wakeup

root:/> cat /sys/class/tty/ttyBF0/power/wakeup

enabled

root:/> echo standby > /sys/power/state

PM: Syncing filesystems ... done.

Freezing user space processes ... (elapsed 0.01 seconds) done.

Freezing remaining freezable tasks ... (elapsed 0.01 seconds) done.

Suspending console(s) (use no_console_suspend to debug)

PM: suspend of devices complete after 4.000 msecs

PM: late suspend of devices complete after 0.001 msecs

Disabling non-boot CPUs ...

Enabling non-boot CPUs ...

Booting Core B.

Instruction Cache Enabled for CPU1

  External memory: cacheable in instruction cache

  L2 SRAM        : uncacheable in instruction cache

Data Cache Enabled for CPU1

  External memory: cacheable (write-through) in data cache

  L2 SRAM        : uncacheable in data cache

CPU1 is up

PM: early resume of devices complete after 0.001 msecs

smc91x smc91x.0: eth0: link down

PM: resume of devices complete after 56.000 msecs

Restarting tasks ... done.

root:/>

root:/> smc91x smc91x.0: eth0: link up, 100Mbps, full-duplex, lpa 0x41E1

 

root:/>

root:/> echo standby > /sys/power/state

PM: Syncing filesystems ... done.

Freezing user space processes ... (elapsed 0.01 seconds) done.

Freezing remaining freezable tasks ... (elapsed 0.02 seconds) done.

Suspending console(s) (use no_console_suspend to debug)

 

--

 

Follow-ups

 

--- Vivi Li                                                  2011-07-24 23:05:25

In recent trunk, this bug has disappeared.

Close it.

 

 

 

    Files

    Changes

    Commits

    Dependencies

    Duplicates

    Associations

    Tags

 

File Name     File Type     File Size     Posted By

config.linux.uart_wakeup    application/octet-stream    29442    Vivi Li

Outcomes