how to bring up imx35 flexCAN bus

[昌清黄]

boen@boen-12:~$ sudo minicom

[sudo] password for boen:

Welcome to minicom 2.5

OPTIONS: I18n

Compiled on May  2 2011, 10:05:24.

Port /dev/ttyS0

Press CTRL-A Z for help on special keys                              

��                                                                   

U-Boot 2009.08 (Jun 25 2014 - 17:53:27)                              

CPU:   Freescale i.MX35 at 532 MHz

Board: MX35 3STACK 2.0 [POR]

I2C:   ready

DRAM:  256 MB

## Unknown FLASH on Bank 1 - Size = 0x00000000 = 0 MB

Flash:  0 kB

_bss_end:0x8786174c   addr:0x87862000

NAND:  Manufacturer      : mira (0xc8)

Device Code       : 0xd5

Cell Technology   : MLC

Chip Size         : 2 GiB

Pages per Block   : 128

Page Geometry     : 4096+128

ECC Strength      : 4 bits

ECC Size          : 512 B

Data Setup Time   : 35 ns

Data Hold Time    : 15 ns

Address Setup Time: 15 ns

GPMI Sample Delay : 6 ns

tREA              : Unknown

tRLOH             : Unknown

tRHOH             : Unknown

Description       : lanrry 3201 nand

Bad block table found at page 524160, version 0x01

Bad block table found at page 524032, version 0x01

2048 MiB

*** Warning - bad CRC or NAND, using default environment

lcd_init

In:    serial

Out:   serial

Err:   serial

vga_init,initializing CH7026

i2c_addr:chip address cycle fail(a1)

i2c_addr failed

board_late_init: read PMIC@0x08:0x7 fail

i.MX35 CPU board version 1.0

i2c_addr:chip address cycle fail(a1)

i2c_addr failed

board_late_init: read PMIC@0x69:0x20 fail

Net:   smc911x: Invalid chip endian 0x90ff90ff

FEC0 [PRIME]

Hit any key to stop autoboot:  0

NAND read: device 0 offset 0xa00000, size 0x300000

3145728 bytes read: OK

## Booting kernel from Legacy Image at 80800000 ...

   Image Name:   Linux-2.6.28-271-gec75a15

   Image Type:   ARM Linux Kernel Image (uncompressed)

   Data Size:    2463596 Bytes =  2.3 MB

   Load Address: 80008000

   Entry Point:  80008000

   Verifying Checksum ... OK

   Loading Kernel Image ... OK

OK

Starting kernel ...

lcd_disable

Uncompressing Linux................................................................................................

Linux version 2.6.28-271-gec75a15 (xw@xiaowei) (gcc version 4.1.2) #231 PREEMPT Thu Jun 26 17:09:21 CST 2014

CPU: ARMv6-compatible processor [4117b363] revision 3 (ARMv6TEJ), cr=00c5387f

CPU: VIPT nonaliasing data cache, VIPT nonaliasing instruction cache

Machine: Freescale MX35 3-Stack Board

Ignoring unrecognised tag 0x54410008

Memory policy: ECC disabled, Data cache writeback

Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 64768

Kernel command line: console=ttymxc0,115200 ubi.mtd=3 root=ubi0:rootfs rootfstype=ubifs

MXC IRQ initialized

PID hash table entries: 1024 (order: 10, 4096 bytes)

Clock input source is 24000000

Console: colour dummy device 80x30

Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)

Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)

Memory: 128MB 128MB = 256MB total

Memory: 254520KB available (4608K code, 355K data, 240K init)

SLUB: Genslabs=12, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1

Calibrating delay loop... 530.84 BogoMIPS (lpj=2654208)

Mount-cache hash table entries: 512

CPU: Testing write buffer coherency: ok

net_namespace: 288 bytes

NET: Registered protocol family 16

L2X0 cache controller enabled

CPU is i.MX35 Revision 2.1

MXC GPIO hardware

mxc_init_mmc, sd0 cd irq is:  121

mxc_cpld_init,remap ok,maped at:0xd8810000

read add:0xd8810050, value:0xd843

read add:0xd8810054, value:0x22252521

read add:0xd8810058, value:0x22220a00

read add:0xd8810060, value:0x0

read add:0xd8810050, value:0xd000

read write bak add:0xd8810054, value:0x22252321

read add:0xd8810058, value:0x22220a00

read write bak add:0xd8810058, value:0x22220a00

Using SDMA I.API

MXC DMA API initialized

SCSI subsystem initialized

CSPI: mxc_spi-0 probed

usbcore: registered new interface driver usbfs

usbcore: registered new interface driver hub

usbcore: registered new device driver usb

MXC I2C driver

clk: Unable to get requested clock: dfm_clk

Bluetooth: Core ver 2.13

NET: Registered protocol family 31

Bluetooth: HCI device and connection manager initialized

Bluetooth: HCI socket layer initialized

NET: Registered protocol family 2

IP route cache hash table entries: 2048 (order: 1, 8192 bytes)

TCP established hash table entries: 8192 (order: 4, 65536 bytes)

TCP bind hash table entries: 8192 (order: 3, 32768 bytes)

TCP: Hash tables configured (established 8192 bind 8192)

TCP reno registered

NET: Registered protocol family 1

usb: Host 2 host (serial) registered

usb: DR host (utmi) registered

usb: DR gadget (utmi) registered

NetWinder Floating Point Emulator V0.97 (double precision)

JFFS2 version 2.2. (NAND) (SUMMARY)  �© 2001-2006 Red Hat, Inc.

msgmni has been set to 497

alg: No test for stdrng (krng)

io scheduler noop registered

io scheduler anticipatory registered

io scheduler deadline registered

io scheduler cfq registered (default)

mxcfb,mxcfb_probe

mxc_ipu mxc_ipu: Channel already uninitialized 14

Console: switching to colour frame buffer device 30x20

mxc_ipu mxc_ipu: Channel already uninitialized 15

mxcfb: fb registered, using mode <NULL>

claa_lcd_init

ch7026_init

ch7026_probe

lcd_probe

lcd_init,initializing CH7026

lcd_init, read id = 0x54

Serial: 8250/16550 driver6 ports, IRQ sharing disabled

serial8250_probe,irq:102 

serial8250.0: ttyS0 at MMIO 0xb6000000 (irq = 0) is a 16550A

serial8250_probe,irq:103 

serial8250.0: ttyS1 at MMIO 0xb6000008 (irq = 0) is a 16550A

serial8250_probe,irq:105 

serial8250.0: ttyS2 at MMIO 0xb6000010 (irq = 0) is a 16550A

serial8250_probe,irq:104 

serial8250.0: ttyS3 at MMIO 0xb6000018 (irq = 0) is a 16550A

serial8250_probe,irq:106 

serial8250.0: ttyS4 at MMIO 0xb6000020 (irq = 0) is a 16550A

serial8250_probe,irq:107 

serial8250.0: ttyS5 at MMIO 0xb6000028 (irq = 0) is a 16550A

Serial: MXC Internal UART driver

mxcintuart.0: ttymxc0 at MMIO 0x43f90000 (irq = 45) is a Freescale MXC

console [ttymxc0] enabled

mxcintuart.1: ttymxc1 at MMIO 0x43f94000 (irq = 32) is a Freescale MXC

mxcintuart.2: ttymxc2 at MMIO 0x5000c000 (irq = 18) is a Freescale MXC

loop: module loaded

vcan: Virtual CAN interface driver

FEC ENET Version 0.2

read id value:0x15

read MAC:0x15

read id value:0x1d

read MAC:0x1d

read id value:0x61

read MAC:0x61

read id value:0xaa

read MAC:0xaa

read id value:0xc9

read MAC:0xc9

read id value:0x72

read MAC:0x72

fec: PHY @ 0x19, ID 0x82018201 -- LAN8700

eth0: ethernet 00:1d:61:aa:c9:72

Linux video capture interface: v2.00

MXC Video Output MXC Video Output.0: Registered device video1

Driver 'sd' needs updating - please use bus_type methods

Driver 'sr' needs updating - please use bus_type methods

MXC MTD nor Driver 2.0

mxc_nor_flash: probe of mxc_nor_flash.0 failed with error -5

MXC MTD nand Driver 2.5

mxc_nd2.c

mxcnd_probe

before nand_scan

chip->cellinfo:0x14

extid:0x29

NAND device: Manufacturer ID: 0xc8, Chip ID: 0xd5 (MIRA NAND 2GiB 3,3V 8-bit)

nand_scan_tail before

chip->ecc.layout:0xc04e4ec8,mtd->oobsize:128

chip->ecc.mode:2

nand_scan_tail after

before add_mtd_device

enter CONFIG_MTD_PARTITIONS

RedBoot partition parsing not available

Creating 4 MTD partitions on "NAND 2GiB 3,3V 8-bit":

0x00000000-0x00a00000 : "nand.bootloader"

0x00a00000-0x01400000 : "nand.kernel"

0x01400000-0x03200000 : "nand.rootfs1"

0x03200000-0x80000000 : "nand.rootfs2"

add_mtd_device done

UBI: attaching mtd3 to ubi0

UBI: physical eraseblock size:   524288 bytes (512 KiB)

UBI: logical eraseblock size:    516096 bytes

UBI: smallest flash I/O unit:    4096

UBI: VID header offset:          4096 (aligned 4096)

UBI: data offset:                8192

UBI: attached mtd3 to ubi0

UBI: MTD device name:            "nand.rootfs2"

UBI: MTD device size:            1998 MiB

UBI: number of good PEBs:        3992

UBI: number of bad PEBs:         4

UBI: max. allowed volumes:       128

UBI: wear-leveling threshold:    4096

UBI: number of internal volumes: 1

UBI: number of user volumes:     1

UBI: available PEBs:             0

UBI: total number of reserved PEBs: 3992

UBI: number of PEBs reserved for bad PEB handling: 39

UBI: max/mean erase counter: 183/1

usbmon: debugfs is not available

Initializing USB Mass Storage driver...

UBI: background thread "ubi_bgt0d" started, PID 958

usbcore: registered new interface driver usb-storage

USB Mass Storage support registered.

mice: PS/2 mouse device common for all mice

MXC keypad loaded

tsc2007_driver_register: Registering Touchscreen device

input: tsc2007 as /class/input/input0

rtc-isl1208 0-006f: chip found, driver version 0.3

rtc-isl1208 0-006f: rtc core: registered rtc-isl1208 as rtc0

i2c /dev entries driver

MXC WatchDog Driver 2.0

MXC Watchdog # 0 Timer: initial timeout 60 sec

Bluetooth: HCI UART driver ver 2.2

Bluetooth: HCI H4 protocol initialized

Bluetooth: HCI BCSP protocol initialized

Bluetooth: HCILL protocol initialized

IPU Post-filter loading

ioctl pointer: c02be734.  mmap pointer: c02be174

RNG Driver: Loading

mxc_asrc registered

Freescale: Register to MMC/SDIO driver

mxsdhci: MXC Secure Digital Host Controller Interface driver

mxsdhci: MXC SDHCI Controller Driver.

mmc0: SDHCI detect irq 121 irq 7 INTERNAL DMA

mxsdhci: MXC SDHCI Controller Driver.

mmc1: SDHCI detect irq 0 irq 8 INTERNAL DMA

usbcore: registered new interface driver usbhid

usbhid: v2.6:USB HID core driver

Advanced Linux Sound Architecture Driver Version 1.0.18rc3.

ASoC version 0.13.2

sgtl5000-i2c 0-000a: SGTL5000 revision 17

DMA Sound Buffers Allocated:UseIram=1 buf->addr=10000000 buf->area=d8aa0000 size=65536

DMA Sound Buffers Allocated:UseIram=1 buf->addr=97dc0000 buf->area=fde01000 size=65536

asoc: SGTL5000 <-> imx-ssi-1 mapping ok

WM8580 Audio Codec 0.1

wm8580device rev:0

DMA Sound Buffers Allocated:UseIram=1 buf->addr=10000000 buf->area=d8ac0000 size=65536

asoc: WM8580 PAIFRX <-> imx-esai-tx mapping ok

DMA Sound Buffers Allocated:UseIram=1 buf->addr=97de0000 buf->area=fde11000 size=65536

DMA Sound Buffers Allocated:UseIram=1 buf->addr=97df0000 buf->area=fde21000 size=65536

asoc: bluetooth <-> imx-ssi-3 mapping ok

ALSA device list:

  #0: imx-3stack (SGTL5000)

  #1: imx-3stack (WM8580)

  #2: imx-3stack (bluetooth)

oprofile: using arm/armv6

TCP cubic registered

NET: Registered protocol family 17

can: controller area network core (rev 20081130 abi 8)

NET: Registered protocol family 29

can: raw protocol (rev 20081130)

can: broadcast manager protocol (rev 20081130)

Bluetooth: L2CAP ver 2.11

Bluetooth: L2CAP socket layer initialized

Bluetooth: SCO (Voice Link) ver 0.6

Bluetooth: SCO socket layer initialized

RPC: Registered udp transport module.

RPC: Registered tcp transport module.

ieee80211: 802.11 data/management/control stack, git-1.1.13

ieee80211: Copyright (C) 2004-2005 Intel Corporation <jketreno@linux.intel.com>

Static Power Management for Freescale i.MX35

VFP support v0.3: implementor 41 architecture 1 part 20 variant b rev 3

MXC Backlight Device mxc_ipu_bl.0 Initialized.

ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver

fsl-ehci fsl-ehci.0: Freescale On-Chip EHCI Host Controller

fsl-ehci fsl-ehci.0: new USB bus registered, assigned bus number 1

fsl-ehci fsl-ehci.0: irq 35, io mem 0x53ff4400

fsl-ehci fsl-ehci.0: USB 2.0 started, EHCI 1.00

usb usb1: configuration #1 chosen from 1 choice

hub 1-0:1.0: USB hub found

hub 1-0:1.0: 1 port detected

fsl-ehci fsl-ehci.1: Freescale On-Chip EHCI Host Controller

fsl-ehci fsl-ehci.1: new USB bus registered, assigned bus number 2

fsl-ehci fsl-ehci.1: irq 37, io mem 0x53ff4000

fsl-ehci fsl-ehci.1: USB 2.0 started, EHCI 1.00

usb usb2: configuration #1 chosen from 1 choice

hub 2-0:1.0: USB hub found

hub 2-0:1.0: 1 port detected

rtc-isl1208 0-006f: setting system clock to 2014-10-22 07:48:47 UTC (1413964127)

UBIFS: recovery needed

UBIFS: recovery completed

UBIFS: mounted UBI device 0, volume 0, name "rootfs"

UBIFS: file system size:   1956003840 bytes (1910160 KiB, 1865 MiB, 3790 LEBs)

UBIFS: journal size:       10452992 bytes (10208 KiB, 9 MiB, 21 LEBs)

UBIFS: media format:       4 (latest is 4)

UBIFS: default compressor: LZO

UBIFS: reserved for root:  0 bytes (0 KiB)

VFS: Mounted root (ubifs filesystem).

Freeing init memory: 240K

usb 1-1: new full speed USB device using fsl-ehci and address 2

init started: BusyBox v1.11.2 ()

starting pid 1049, tty '': '/etc/rc.d/rcS'

Mounting /proc and /sys

usb 1-1: not running at top speed; connect to a high speed hub

usb 1-1: configuration #1 chosen from 1 choice

hub 1-1:1.0: USB hub found

hub 1-1:1.0: 4 ports detected

Starting the hotplug events dispatcher udevd

Synthesizing initial hotplug events

Setting the hostname to freescale

Mounting filesystems

Running sysctl

Setting up networking on loopback device:

Setting up networking on eth0:

udhcpc (v1.11.2) started

eth0: config: auto-negotiation on, 100FDX, 100HDX, 10FDX, 10HDX.

Sending discover...

Sending discover...

Sending discover...

No lease, forking to background

Starting inetd:

Starting the dropbear ssh server:

mkdir: cannot create directory '/mnt/udisk': File exists

Start Qt-4.7.0

Do not need start ts_calibrate!

starting pid 1950, tty '': '/sbin/getty -L ttymxc0 115200 vt100'

arm-none-linux-gnueabi-gcc (GCC) 4.1.2

root filesystem built on Sat, 20 Jun 2009 16:18:46 +0800

Freescale Semiconductor, Inc.

freescale login: Error opening mouse device '/dev/input/mouse0': No such file or directory

Cannot open keyboard input device '/dev/input/keyboard1': No such file or directory

arm-none-linux-gnueabi-gcc (GCC) 4.1.2

root filesystem built on Sat, 20 Jun 2009 16:18:46 +0800

Freescale Semiconductor, Inc.

freescale login: root

login[1950]: root login on 'ttymxc0'

BusyBox v1.11.2 () built-in shell (ash)

Enter 'help' for a list of built-in commands.

~ # cat /proc/net/can/

/proc/net/can/rcvlist_all  /proc/net/can/rcvlist_sff

/proc/net/can/rcvlist_eff  /proc/net/can/reset_stats

/proc/net/can/rcvlist_err  /proc/net/can/stats

/proc/net/can/rcvlist_fil  /proc/net/can/version

/proc/net/can/rcvlist_inv

~ # cat /proc/net/can/rcvlist_all

receive list 'rx_all':

  (any: no entry)

~ # ls /sys/devices/

/sys/devices/platform/  /sys/devices/system/

~ # ls /sys/devices/platform/

/sys/devices/platform/FlexCAN.0/

/sys/devices/platform/FlexCAN.1/

/sys/devices/platform/MXC Video Output.0/

/sys/devices/platform/fsl-ehci.0/

/sys/devices/platform/fsl-ehci.1/

/sys/devices/platform/fsl-usb2-udc/

/sys/devices/platform/gps_ioctrl.0/

/sys/devices/platform/i2c-adapter:i2c-0/

/sys/devices/platform/imx-3stack-bt.0/

/sys/devices/platform/imx-3stack-sgtl5000/

/sys/devices/platform/imx-3stack-wm8580.0/

~ # ls /sys/devices/platform/FlexCAN.0/

/sys/devices/platform/FlexCAN.0/bus/

/sys/devices/platform/FlexCAN.0/modalias

/sys/devices/platform/FlexCAN.0/power/

/sys/devices/platform/FlexCAN.0/subsystem/

/sys/devices/platform/FlexCAN.0/uevent

~ # ls /sys/devices/platform/FlexCAN.0/

[adamhuang]

i.MX6UL has similar issue when accessing to CAN bus. `ifconfig -a` can get CAN0 interface info, and `dmesg | grep can` also shows that the driver is loaded successfully. However, executing `canfdtest can0` or `candump can0` will get the message of "Network is down".

Attempt to activate the CAN0 interface with `ifconfig  can0  up`, the following message obtained:
ifconfig: SIOCSIFFLAGS:  Invalid argument

[igorpadykov]

Hi 昌清

first one needs to set the proper baud rate configuration, you need to set different time

parameters, for example you can type the following commands:

modprobe flexcan

echo "19" > br_presdiv

echo "5" > br_propseg

echo "5" > br_pseg1

echo "3" > br_pseg2

ifconfig can0 up

These commands assign values of 19 for the prescaler divider, 5 for the

propagation segment and so forth.

Install and use cantest (note one needs to connect can device to

i.MX35, can tests requires two devices to be used), run LTIB as follows:

./ltib -m prep -p cantest.spec

./ltib -m scbuild -p cantest.spec

./ltib -m scdeploy -p cantest.spec

One can use CAN protocol analyzer such as KVASER CAN.

Also refer to attached files.

Best regards

igor

[昌清黄]

Hi:

thanks!

please check attach file!

but i don't find linux kernel in L2.6.31_09.12.01_SDK_source

where is kernel?

[igorpadykov]

install ltib, please read AN3984

i.MX35 Board Initialization and Memory Mapping Using the Linux Target Image Builder (LTIB)

i.MX35 Product Development Kit (PDK)|Freescale

L2.6.31_09.12.01_SDK_SOURCE : Linux 2.6.31 Source Code Files 2009.12 Release support i.MX23, i.MX25, i.MX35

[昌清黄]

hi igropadykov

              kernel .config file

CONFIG_CAN=y
CONFIG_CAN_RAW=y
CONFIG_CAN_BCM=y

#
# CAN Device Drivers
#
CONFIG_CAN_VCAN=y
CONFIG_CAN_DEBUG_DEVICES=y
CONFIG_CAN_FLEXCAN=y
# CONFIG_IRDA is not set
CONFIG_BT=y
CONFIG_BT_L2CAP=y
CONFIG_BT_SCO=y

      why boot kernel, but CAN_FLEXCAN don't run?

code

static __init int flexcan_init(void)
{
        pr_info("Freescale FlexCAN Driver \n");
        printk("%s: Freescale FlexCAN Driver \n", __func__);
        return platform_driver_register(&flexcan_driver);
}

static __exit void flexcan_exit(void)
{
        return platform_driver_unregister(&flexcan_driver);
}

module_init(flexcan_init);
module_exit(flexcan_exit);

boot log:

~ # dmesg | grep Driver
Driver 'sd' needs updating - please use bus_type methods
Driver 'sr' needs updating - please use bus_type methods
MXC MTD nor Driver 2.0
MXC MTD nand Driver 2.5
MXC WatchDog Driver 2.0
RNG Driver: Loading
mxsdhci: MXC SDHCI Controller Driver.
mxsdhci: MXC SDHCI Controller Driver.
Advanced Linux Sound Architecture Driver Version 1.0.18rc3.
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
~ # mod
modeline2fb  modprobe
~ # modprobe flexcan
flexcan: Unknown symbol regulator_enable
flexcan: Unknown symbol regulator_get
flexcan: Unknown symbol regulator_put
flexcan: Unknown symbol regulator_disable
insmod: cannot insert '/lib/modules/2.6.28-271-gec75a15/kernel/drivers/net/can/flexcan/flexcan.ko': unknown symboe
modprobe: failed to load module flexcan
~ #

flexcan module don't work

[igorpadykov]

you can try Demo image

L2.6.31_MX35_SDK_0912_IMAGE : Linux 2.6.31 Binary Demo Files 2009.12 Release.

[昌清黄]

hi igropadykov;

               I'm very sorry so long didn't reply to you。

               I compared the differences between 2.6.28 and 2.6.31（can bus module code） ，their modification is not much。

               Now our customers eager to use the product，I can't to modify all of the code。

               I can only be modified in the current version。

               So I can only modify the CAN bus related parts。

               Please provide some guidance related professionals

thanks

[igorpadykov]

Hi 昌清

I am afraid 2.6.28 can not be supported since this is preliminary

BSP, not fully tested. Please migrate to official release

L2.6.31_09.12.01_SDK_SOURCE : Linux 2.6.31 Source Code Files 2009.12

Release support i.MX23, i.MX25, i.MX35, i.MX51..

Size (K): 604060 Format: gz Rev #: 2009.12 Modified: 2/17/2010

~igor

[昌清黄]

Hi    igorpadykov   :

      Now the driver has a normal load, i can see the flexcan sys information, I have test tool when sending data of two target board, will be in error,

      display interrupt a problem, the other can not receive data

     i I refer to Socket-CAN Users - Re: How to test flexcan driver

BOARD A：

     ~ # ifconfig -a
can0      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 
          NOARP  MTU:16  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:64
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

can1      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 
          NOARP  MTU:16  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:64
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

eth0      Link encap:Ethernet  HWaddr 00:2B:41:AA:C9:72 
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:3 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1038 (1.0 KiB)  TX bytes:2360 (2.3 KiB)
          Base address:0x8000

lo        Link encap:Local Loopback 
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

~ # ifconfig can0 up
changqing: func:flexcan_open start!
gpio_can_active, id:0
file:arch/arm/mach-mx35/mx35_3stack.c,func:flexcan_xcvr_enable,line:1243
file:arch/arm/mach-mx35/mx35_3stack.c,func:flexcan_xcvr_enable,line:1250
file:arch/arm/mach-mx35/mx35_3stack.c,func:flexcan_xcvr_enable,line:1256
file:drivers/net/can/flexcan/drv.c,func:flexcan_hw_open,line:308 start!
file:drivers/net/can/flexcan/drv.c,func:flexcan_hw_reset,line:107
file:drivers/net/can/flexcan/drv.c,func:flexcan_hw_open,line:316
file:drivers/net/can/flexcan/drv.c,func:flexcan_mcr_setup,line:118 start
file:drivers/net/can/flexcan/drv.c,func:flexcan_mcr_setup,line:170 OK!
file:drivers/net/can/flexcan/drv.c,func:flexcan_ctrl_setup,line:176 start
file:drivers/net/can/flexcan/drv.c,func:flexcan_ctrl_setup,line:219 OK!
file:drivers/net/can/flexcan/drv.c,func:flexcan_hw_open,line:331 ok!
file:drivers/net/can/flexcan/drv.c,func:flexcan_open,line:541
changqing: flexcan_mbm_init start!
changqing: flexcan_mbm_init ok!
file:drivers/net/can/flexcan/drv.c,func:flexcan_hw_start,line:46
file:drivers/net/can/flexcan/drv.c,func:flexcan_hw_start,line:65  ,CAN_HW_REG_MCR:0x4dc3023f
file:drivers/net/can/flexcan/drv.c,func:flexcan_open,line:549 ok
~ # cd /sys/devices/
/sys/devices/platform/  /sys/devices/system/
~ # cd /sys/devices/platform/FlexCAN.0/
/sys/devices/platform/FlexCAN.0 # ls
abort           br_rjw          local_priority  subsystem
bcc             bus             loopback        tsyn
bitrate         driver          maxmb           uevent
boff_rec        dump_reg        modalias        wak_src
br_clksrc       dump_rx_mb      power           wakeup
br_presdiv      dump_xmit_mb    smp             xmit_maxmb
br_propseg      ext_msg         srx_dis
br_pseg1        fifo            state
br_pseg2        listen          std_msg
/sys/devices/platform/FlexCAN.0 # cat bitrate
changqing: flexcan_show_attr start! the line: 248
500000
/sys/devices/platform/FlexCAN.0 # cat state
changqing: flexcan_show_attr start! the line: 248
Start::normal
/sys/devices/platform/FlexCAN.0 # candump can0 
interface = can0, family = 29, type = 3, proto = 1

BOARD B:
~ # ifconfig can0 up
changqing: func:flexcan_open start!
gpio_can_active, id:0
file:arch/arm/mach-mx35/mx35_3stack.c,func:flexcan_xcvr_enable,line:1243
file:arch/arm/mach-mx35/mx35_3stack.c,func:flexcan_xcvr_enable,line:1250
file:arch/arm/mach-mx35/mx35_3stack.c,func:flexcan_xcvr_enable,line:1256
file:drivers/net/can/flexcan/drv.c,func:flexcan_hw_open,line:308 start!
file:drivers/net/can/flexcan/drv.c,func:flexcan_hw_reset,line:107
file:drivers/net/can/flexcan/drv.c,func:flexcan_hw_open,line:316
file:drivers/net/can/flexcan/drv.c,func:flexcan_mcr_setup,line:118 start
file:drivers/net/can/flexcan/drv.c,func:flexcan_mcr_setup,line:170 OK!
file:drivers/net/can/flexcan/drv.c,func:flexcan_ctrl_setup,line:176 start
file:drivers/net/can/flexcan/drv.c,func:flexcan_ctrl_setup,line:219 OK!
file:drivers/net/can/flexcan/drv.c,func:flexcan_hw_open,line:331 ok!
file:drivers/net/can/flexcan/drv.c,func:flexcan_open,line:541
changqing: flexcan_mbm_init start!
changqing: flexcan_mbm_init ok!
file:drivers/net/can/flexcan/drv.c,func:flexcan_hw_start,line:46
file:drivers/net/can/flexcan/drv.c,func:flexcan_hw_start,line:65  ,CAN_HW_REG_MCR:0x4dc3023f
file:drivers/net/can/flexcan/drv.c,func:flexcan_open,line:549 ok
~ # cansend can0 46846946+3
interface = can0, family = 29, tfile:drivers/net/can/flexcan/drv.c,func:flexcan_start_xmit,line:470
ype = 3, proto = 1
file:drivers/net/can/flexcan/drv.c,func:flexcan_start_xmit,line:477
file:drivers/net/can/flexcan/drv.c,func:flexcan_start_xmit,line:482
file:drivers/net/can/flexcan/drv.c,func:flexcan_irq_handler,line:438
file:drivers/net/can/flexcan/drv.c,func:flexcan_irq_handler,line:444
file:drivers/net/can/flexcan/drv.c,func:flexcan_irq_handler,CAN_HW_REG_ESR:16438
file:drivers/net/can/flexcan/drv.c,func:flexcan_err_handler,line:345
file:drivers/net/can/flexcan/drv.c,func:flexcan_err_handler,line:361
file:drivers/net/can/flexcan/drv.c,func:flexcan_hw_busoff,line:287
file:drivers/net/can/flexcan/drv.c,func:flexcan_err_handler,line:423
NOHZ: local_softirq_pending 08

I have a question, how to configure arch/arm/mach-mx35/mx35_3stack.c  （flexcan）

I find flexcan module requires a power supply, how to allocate the power？

#if defined(CONFIG_CAN_FLEXCAN) || defined(CONFIG_CAN_FLEXCAN_MODULE)
static void flexcan_xcvr_enable(int id, int en)
{
    static int pwdn;

    #ifdef  DEBUG_DZY 
    printk(KERN_ERR "file:%s,func:%s,line:%d\n",__FILE__,__func__,__LINE__);
    #endif

    if (id < 0 || id > 1)
        return;

    #ifdef  DEBUG_DZY 
    printk(KERN_ERR "file:%s,func:%s,line:%d\n",__FILE__,__func__,__LINE__);
    #endif
  

#ifdef CONFIG_MACH_MX35_MDK
    #ifdef DEBUG_DZY 
    printk(KERN_ERR "file:%s,func:%s,line:%d\n",__FILE__,__func__,__LINE__);
    #endif
   
#else
    if (en) {
   
        #ifdef DEBUG_DZY 
        printk(KERN_ERR "file:%s,func:%s,line:%d\n",__FILE__,__func__,__LINE__);
        #endif
   
        if (!(pwdn++))
            pmic_gpio_set_bit_val(MCU_GPIO_REG_GPIO_CONTROL_2,
                          1, 0);
    } else {
        if (!(--pwdn))
            pmic_gpio_set_bit_val(MCU_GPIO_REG_GPIO_CONTROL_2,
                          1, 1);
    }
#endif
}

#if 0  //by dengzy

struct flexcan_platform_data flexcan_data[] = {
    {
     .core_reg = "GPO2",
     .io_reg = NULL,
     .xcvr_enable = flexcan_xcvr_enable,
     .active = gpio_can_active,
     .inactive = gpio_can_inactive,},
    {
     .core_reg = "GPO2",
     .io_reg = NULL,
     .xcvr_enable = flexcan_xcvr_enable,
     .active = gpio_can_active,
     .inactive = gpio_can_inactive,},
};
#else
struct flexcan_platform_data flexcan_data[] = {
    {
     .core_reg =NULL,
     .io_reg = NULL,
     .xcvr_enable = flexcan_xcvr_enable,
     .active = gpio_can_active,
     .inactive = gpio_can_inactive,},
    {
     .core_reg = NULL,
     .io_reg = NULL,
     .xcvr_enable = flexcan_xcvr_enable,
     .active = gpio_can_active,
     .inactive = gpio_can_inactive,},
};

#endif  // by dengzy

#endif

[igorpadykov]

2.6.28 kernel is very old and not supported.Please migrate to official release

L2.6.31_09.12.01_SDK_SOURCE : Linux 2.6.31 Source Code Files 2009.12

[昌清黄]

Hi igorpad:

          i porting to linux 2.6.31

          board A:

          ~ # ifconfig -a
can0      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 
          NOARP  MTU:16  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:64
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

can1      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 
          NOARP  MTU:16  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:64
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

lo        Link encap:Local Loopback 
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

~ # ifconfig can0 up
changqing: func:flexcan_open start!
i2c-adapter i2c-0: ACK not received
i2c-adapter i2c-0: ACK not received
file:drivers/net/can/flexcan/drv.c,func:flexcan_hw_open,line:301 start!
file:drivers/net/can/flexcan/drv.c,func:flexcan_hw_reset,line:107
file:drivers/net/can/flexcan/drv.c,func:flexcan_hw_open,line:309
file:drivers/net/can/flexcan/drv.c,func:flexcan_mcr_setup,line:118 start
file:drivers/net/can/flexcan/drv.c,func:flexcan_mcr_setup,line:163 OK!
file:drivers/net/can/flexcan/drv.c,func:flexcan_ctrl_setup,line:169 start
file:drivers/net/can/flexcan/drv.c,func:flexcan_ctrl_setup,line:212 OK!
file:drivers/net/can/flexcan/drv.c,func:flexcan_hw_open,line:324 ok!
file:drivers/net/can/flexcan/drv.c,func:flexcan_open,line:527
file:drivers/net/can/flexcan/drv.c,func:flexcan_hw_start,line:46
file:drivers/net/can/flexcan/drv.c,func:flexcan_hw_start,line:65  ,CAN_HW_REG_MCR:0x4987023f
file:drivers/net/can/flexcan/drv.c,func:flexcan_open,line:535 ok
~ # uname -a
Linux freescale 2.6.31-207-g7286c01 #9 PREEMPT Mon Nov 24 09:27:19 CST 2014 armv6l unknown
~ # cd /sys/devices/platform/FlexCAN.0
/sys/devices/platform/FlexCAN.0 # ls
abort           br_rjw          local_priority  subsystem
bcc             bus             loopback        tsyn
bitrate         driver          maxmb           uevent
boff_rec        dump_reg        modalias        wak_src
br_clksrc       dump_rx_mb      power           wakeup
br_presdiv      dump_xmit_mb    smp             xmit_maxmb
br_propseg      ext_msg         srx_dis
br_pseg1        fifo            state
br_pseg2        listen          std_msg
/sys/devices/platform/FlexCAN.0 # cat state
Start::normal
/sys/devices/platform/FlexCAN.0 # candump can0
interface = can0, family = 29, type = 3, proto = 1

board B

MXC Backlight Device mxc_ipu_bl.0 Initialized.
mxc_rtc mxc_rtc.0: setting system clock to 1970-01-01 00:05:02 UTC (302)
UBIFS: recovery needed
UBIFS: recovery completed
UBIFS: mounted UBI device 0, volume 0, name "rootfs"
UBIFS: file system size:   2032902144 bytes (1985256 KiB, 1938 MiB, 3939 LEBs)
UBIFS: journal size:       10452992 bytes (10208 KiB, 9 MiB, 21 LEBs)
UBIFS: media format:       w4/r0 (latest is w4/r0)
UBIFS: default compressor: lzo
UBIFS: reserved for root:  0 bytes (0 KiB)
VFS: Mounted root (ubifs filesystem) on device 0:11.
Freeing init memory: 128K
init started: BusyBox v1.11.2 ()
starting pid 970, tty '': '/etc/rc.d/rcS'
Mounting /proc and /sys
Starting the hotplug events dispatcher udevd
Synthesizing initial hotplug events
Setting the hostname to freescale
Mounting filesystems
Running sysctl
Setting up networking on loopback device:
Setting up networking on eth0:
udhcpc: SIOCGIFINDEX: No such device
Starting inetd:
Starting the dropbear ssh server:
mkdir: cannot create directory '/mnt/udisk': File exists
starting pid 1887, tty '': '/sbin/getty -L ttymxc0 115200 vt100'
Start Qt-4.6
Do not need start ts_calibrate!

arm-none-linux-gnueabi-gcc (GCC) 4.1.2
root filesystem built on Sat, 20 Jun 2009 16:18:46 +0800
Freescale Semiconductor, Inc.

freescale login: Error opening mouse device '/dev/input/mouse0': No such file or directory
QWSTslibMouseHandlerPrivate: ts_open() failed with error: 'No such file or directory'
Please check your tslib installation!

arm-none-linux-gnueabi-gcc (GCC) 4.1.2
root filesystem built on Sat, 20 Jun 2009 16:18:46 +0800
Freescale Semiconductor, Inc.

freescale login: root
login[1887]: root login on 'ttymxc0'

BusyBox v1.11.2 () built-in shell (ash)
Enter 'help' for a list of built-in commands.

~ # ifconfig -a
can0      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
          NOARP  MTU:16  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:64
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

can1      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
          NOARP  MTU:16  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:64
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

~ # ifconfig can0 up
changqing: func:flexcan_open start!
i2c-adapter i2c-0: ACK not received
i2c-adapter i2c-0: ACK not received
file:drivers/net/can/flexcan/drv.c,func:flexcan_hw_open,line:301 start!
file:drivers/net/can/flexcan/drv.c,func:flexcan_hw_reset,line:107
file:drivers/net/can/flexcan/drv.c,func:flexcan_hw_open,line:309
file:drivers/net/can/flexcan/drv.c,func:flexcan_mcr_setup,line:118 start
file:drivers/net/can/flexcan/drv.c,func:flexcan_mcr_setup,line:163 OK!
file:drivers/net/can/flexcan/drv.c,func:flexcan_ctrl_setup,line:169 start
file:drivers/net/can/flexcan/drv.c,func:flexcan_ctrl_setup,line:212 OK!
file:drivers/net/can/flexcan/drv.c,func:flexcan_hw_open,line:324 ok!
file:drivers/net/can/flexcan/drv.c,func:flexcan_open,line:527
file:drivers/net/can/flexcan/drv.c,func:flexcan_hw_start,line:46
file:drivers/net/can/flexcan/drv.c,func:flexcan_hw_start,line:65  ,CAN_HW_REG_MCR:0x4987023f
file:drivers/net/can/flexcan/drv.c,func:flexcan_open,line:535 ok
~ # uname -a
Linux freescale 2.6.31-207-g7286c01 #9 PREEMPT Mon Nov 24 09:27:19 CST 2014 armv6l unknown
~ # cd /sys/devices/platform/FlexCAN.0
/sys/devices/platform/FlexCAN.0 # ls
abort           br_rjw          local_priority  subsystem
bcc             bus             loopback        tsyn
bitrate         driver          maxmb           uevent
boff_rec        dump_reg        modalias        wak_src
br_clksrc       dump_rx_mb      power           wakeup
br_presdiv      dump_xmit_mb    smp             xmit_maxmb
br_propseg      ext_msg         srx_dis
br_pseg1        fifo            state
br_pseg2        listen          std_msg
/sys/devices/platform/FlexCAN.0 # cat state
Start::normal
/sys/devices/platform/FlexCAN.0 # cansend can0 123456789
interface = can0, family = 29, tfile:drivers/net/can/flexcan/drv.c,func:flexcan_start_xmit,line:463
ype = 3, proto = 1
file:drivers/net/can/flexcan/drv.c,func:flexcan_start_xmit,line:470
file:drivers/net/can/flexcan/drv.c,func:flexcan_start_xmit,line:475
file:drivers/net/can/flexcan/drv.c,func:flexcan_irq_handler,line:431
file:drivers/net/can/flexcan/drv.c,func:flexcan_irq_handler,line:437
file:drivers/net/can/flexcan/drv.c,func:flexcan_irq_handler,CAN_HW_REG_ESR:16438
file:drivers/net/can/flexcan/drv.c,func:flexcan_err_handler,line:338
file:drivers/net/can/flexcan/drv.c,func:flexcan_err_handler,line:354
file:drivers/net/can/flexcan/drv.c,func:flexcan_hw_busoff,line:280
file:drivers/net/can/flexcan/drv.c,func:flexcan_err_handler,line:416
/sys/devices/platform/FlexCAN.0 #

[昌清黄]

But the workload will be very large, because the time is tight, I can only modify part of the code 发自网易邮箱 在2014年11月17日 21:05 ，igorpadykov写道： how to bring up imx35 flexCAN bus reply from igorpadykov in i.MX Community - View the full discussion Hi 昌清 I am afraid 2.6.28 can not be supported since this is preliminary BSP, not fully tested. Please migrate to official release L2.6.31_09.12.01_SDK_SOURCE http://www.freescale.com/files/graphic/SECURITYINFOIMAGE.gif : Linux 2.6.31 Source Code Files 2009.12 Release support i.MX23, i.MX25, i.MX35, i.MX51.. Size (K): 604060 Format: gz Rev #: 2009.12 Modified: 2/17/2010 ~igor Did your question get answered? If so, say thanks by clicking Correct Answer in the community thread! Reply to this message by replying to this email, or go to the message on Freescale Community Start a new discussion in i.MX Community by email or at Freescale Community Following how to bring up imx35 flexCAN bus in these streams: Inbox

[昌清黄]

Hi freescale:

but have this issue

~ # modprobe flexcan

flexcan: Unknown symbol regulator_enable

flexcan: Unknown symbol regulator_get

flexcan: Unknown symbol regulator_put

flexcan: Unknown symbol regulator_disable

insmod: cannot insert

'/lib/modules/2.6.28-271-gec75a15/kernel/drivers/net/can/flexcan/flexcan.ko':

unknown symbole

modprobe: failed to load module flexcan

~ #

[igorpadykov]

Hi 昌清

2.6.28 kernel is outdated, please use latest:

L2.6.31_09.12.01_SDK_SOURCE : Linux 2.6.31 Source Code Files 2009.12 Release support i.MX23, i.MX25, i.MX35

~igor