Dan Howell
I am getting the following trace when using the enc28J60. Can anyone help me figure out why?
Thanx
beaglebone login: OPOP[ 115.791804] Unable to handle kernel NULL pointer dereference at virtual address 0000005c
[ 115.799996] pgd = c0004000
[ 115.802752] [0000005c] *pgd=00000000
[ 115.806357] Internal error: Oops: 17 [#1] THUMB2
[ 115.810995] Modules linked in: pvrsrvkm(O) sg ftdi_sio usbserial evdev uio_pdrv_genirq uio usb_f_mass_storage usb_f_acm u_serial usb_f_ecm usb_f_rndis u_ether libcomposite spidev tieqep ip_tables x_tables uas
[ 115.829722] CPU: 0 PID: 89 Comm: kworker/0:2 Tainted: G O 4.4.115-bone21 #1
[ 115.837846] Hardware name: Generic AM33XX (Flattened Device Tree)
[ 115.843990] Workqueue: events enc28j60_tx_work_handler
[ 115.849154] task: dc3126c0 ti: dc33a000 task.ti: dc33a000
[ 115.854579] PC is at enc28j60_tx_work_handler+0x34/0xe0
[ 115.859834] LR is at process_one_work+0xed/0x29c
[ 115.864472] pc : [<c047ef6c>] lr : [<c003bbd9>] psr: 00000033
[ 115.864472] sp : dc33bef8 ip : 00000000 fp : 00000000
[ 115.875998] r10: ddaba4dc r9 : 00000000 r8 : de344100
[ 115.881244] r7 : ddaba4c8 r6 : c0b639c8 r5 : ddaba4c0 r4 : ddaba4d8
[ 115.887798] r3 : 00000000 r2 : c0b639d8 r1 : 01b00000 r0 : ddaba4c8
[ 115.894355] Flags: nzcv IRQs on FIQs on Mode SVC_32 ISA Thumb Segment none
[ 115.901695] Control: 50c5387d Table: 9dbd8019 DAC: 00000051
[ 115.907464] Process kworker/0:2 (pid: 89, stack limit = 0xdc33a210)
[ 115.913758] Stack: (0xdc33bef8 to 0xdc33c000)
[ 115.918134] bee0: ddaba4d8 dc2f5400
[ 115.926353] bf00: c0b639c8 00000000 de344100 c003bbd9 dc33a000 c0b639c8 dc33bf30 dc2f5400
[ 115.934572] bf20: dc2f5418 c0b639c8 00000008 c0b639d8 dc33a000 c0b639c8 00000000 c003c5ef
[ 115.942790] bf40: dc33a000 ffffe000 dc33bf60 00000000 dc323cc0 dc33a000 dc2f5400 c003c539
[ 115.951008] bf60: 00000000 00000000 00000000 c003fba1 00000000 dc323cc0 dc2f5400 00000000
[ 115.959227] bf80: dc33bf80 dc33bf80 00000000 dc33bf8c dc33bf8c 01e6d284 dc323cc0 c003fae9
[ 115.967445] bfa0: 00000000 00000000 00000000 c000eac5 00000000 00000000 00000000 00000000
[ 115.975663] bfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 115.983881] bfe0: 00000000 00000000 00000000 00000000 00000013 00000000 efbff35b 6f7fdfff
[ 115.992111] [<c047ef6c>] (enc28j60_tx_work_handler) from [<c003bbd9>] (process_one_work+0xed/0x29c)
[ 116.001206] [<c003bbd9>] (process_one_work) from [<c003c5ef>] (worker_thread+0xb7/0x374)
[ 116.009342] [<c003c5ef>] (worker_thread) from [<c003fba1>] (kthread+0xb9/0xcc)
[ 116.016610] [<c003fba1>] (kthread) from [<c000eac5>] (ret_from_fork+0x11/0x2c)
[ 116.023870] Code: 3c04 f1a4 0710 4638 (6dde) f8d3
[ 116.028753] ---[ end trace 794b457ee9aa6f3c ]---
.
.
. Fixing recursive fault but reboot is needed!
[ 142.445214] Kernel panic - not syncing: corrupted stack end detected inside scheduler
[ 142.445214]
[ 144.650075] ---[ end Kernel panic - not syncing: corrupted stack end detected inside scheduler
I am using Linux beaglebone 4.4.115-bone21
/boot/uEnv.txt is as follows:
#Docs: http://elinux.org/Beagleboard:U-boot_partitioning_layout_2.0
uname_r=4.4.115-bone21
#uuid=
#dtb=
###U-Boot Overlays###
###Documentation: http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#U-Boot_Overlays
###Master Enable
enable_uboot_overlays=1
###
###Overide capes with eeprom
#uboot_overlay_addr0=/lib/firmware/<file0>.dtbo
uboot_overlay_addr1=/lib/firmware/BB-UART2-00A0.dtbo
###
###Additional custom capes
uboot_overlay_addr4=/lib/firmware/enc28j60-00A0.dtbo
uboot_overlay_addr6=/lib/firmware/BB-I2C1-00A0.dtbo
###
###Custom Cape
###
###Disable auto loading of virtual capes (emmc/video/wireless/adc)
disable_uboot_overlay_video=1
disable_uboot_overlay_audio=1
cmdline=coherent_pool=1M net.ifnames=0 quiet
#In the event of edid real failures, uncomment this next line:
#cmdline=coherent_pool=1M net.ifnames=0 quiet video=HDMI-A-1:1024x768@60e
##Example v4.1.x
cape_enable=bone_capemgr.enable_partno=BB-I2C1-00A0,BB-UART2,enc28j60
dmesg output:
root@beaglebone:~# dmesg | grep spi
[ 3.905875] omap2_mcspi 481a0000.spi: chipselect 0 already in use
[ 3.912063] spi_master spi1: spi_device register error /ocp/spi@481a0000/chan
nel@0
[ 3.919689] spi_master spi1: Failed to create SPI device for /ocp/spi@481a000
0/channel@0
[ 3.920887] enc28j60 spi1.0: enc28j60 Ethernet driver 1.01 loaded
enc28j60.dts:
/*
* Copyright (C) 2017 Robert Nelson <robert...@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/dts-v1/;
/plugin/;
#include <dt-bindings/board/am335x-bbw-bbb-base.h>
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/pinctrl/am33xx.h>
#include <dt-bindings/interrupt-controller/irq.h>
/ {
/* state the resources this cape uses */
exclusive-use =
/* the pin header uses */
"P9.25", /* INT */
"P9.27", /* RESET */
/* D1 <==> MOSI output and D0 <==> MISO input - as corrected by Chris on 4 Apr 2018 */
"P9.31", /* spi1_sclk */
"P9.29", /* spi1_d0 */
"P9.30", /* spi1_d1 */
"P9.28", /* spi1_cs0 */
// "P9.42", /* spi1_cs1 */
/* the hardware ip uses */
"spi1";
fragment@0 {
target = <&am33xx_pinmux>;
__overlay__ {
enc28j60_pins: pinmux_enc28j60_pins {
pinctrl-single,pins = <
AM33XX_IOPAD(0x09ac, PIN_INPUT_PULLUP | MUX_MODE7 ) /* aka P9_25 GPIO3[21], INPUT_PULLUP | MODE7 INT */
AM33XX_IOPAD(0x09a4, PIN_INPUT_PULLUP | MUX_MODE7 ) /* aka P9_27 GPIO3[19], INPUT_PULLUP | MODE7 RESET */
>;
};
bb_spi1_pins: pinmux_bb_spi1_pins {
pinctrl-single,pins = <
AM33XX_IOPAD(0x0990, PIN_INPUT_PULLUP | MUX_MODE3 )/* aka P9_31 mcasp0_aclkx.spi1_sclk, INPUT_PULLUP | MODE3 */
AM33XX_IOPAD(0x0994, PIN_INPUT_PULLUP | MUX_MODE3 )/* aka P9_29 mcasp0_fsx.spi1_d0, INPUT_PULLUP | MODE3 */
AM33XX_IOPAD(0x0998, PIN_OUTPUT_PULLUP | MUX_MODE3 )/* aka P9_30 mcasp0_axr0.spi1_d1, OUTPUT_PULLUP | MODE3 */
AM33XX_IOPAD(0x099c, PIN_OUTPUT_PULLUP | MUX_MODE3 )/* aka P9_28 mcasp0_ahclkr.spi1_cs0, OUTPUT_PULLUP | MODE3 */
>;
};
};
};
fragment@1 {
target = <&spi1>;
__overlay__ {
#address-cells = <1>;
#size-cells = <0>;
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&bb_spi1_pins>;
/* may not need this */
ti,pio-mode; /* disable dma when used as an overlay, dma gets stuck at 160 bits... */
channel@0 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "spidev";
reg = <0>;
spi-max-frequency = <16000000>;
spi-cpha;
};
channel@1 {
status = "disabled";
};
enc28j60: ethernet@1 {
compatible = "microchip,enc28j60";
pinctrl-names = "default";
pinctrl-0 = <&enc28j60_pins>;
reg = <0x0>;
interrupt-parent = <&gpio3>;
interrupts = <21 IRQ_TYPE_EDGE_FALLING>;
spi-max-frequency = <16000000>;
};
};
};
};