Problem with i.MX6ULL and Murata WiFi 1CK

[polyvection]

Hi,

on our custom design with i.MX6ULL we are using the Murata 1CK WiFi/BT module.

Unfortunately we are not able to get the driver loading correctly.

According to the imx6ul-evk-btwifi.dtsi we have added the following to our devicetree:

regulators {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <0>;

wlreg_on: fixedregulator@100 {
compatible = "regulator-fixed";
regulator-min-microvolt = <5000000>;
regulator-max-microvolt = <5000000>;
regulator-name = "wlreg_on";
gpio = <&gpio1 2 0>;
startup-delay-us = <100>;
enable-active-high;
};
};

bcmdhd_wlan_0: bcmdhd_wlan@0 {
compatible = "android,bcmdhd_wlan";
wlreg_on-supply = <&wlreg_on>;
};

...

&usdhc1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_usdhc1 &pinctrl_wifi>;
no-1-8-v;
non-removable;
cd-post;
pm-ignore-notify;
wifi-host; /* add hook for SD card detect mechanism for BCMDHD driver */
};

...

&iomuxc {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_hog_1>;

imx6ul-evk-murata-v2 {
pinctrl_wifi: wifigrp {
fsl,pins = <
MX6UL_PAD_GPIO1_IO02__GPIO1_IO02 0x03029 /* WL-REG-ON */
>;
};
};

imx6ul-evk {

...

pinctrl_usdhc1: usdhc1grp {
fsl,pins = <
MX6UL_PAD_SD1_CMD__USDHC1_CMD 0x17059
MX6UL_PAD_SD1_CLK__USDHC1_CLK 0x10071
MX6UL_PAD_SD1_DATA0__USDHC1_DATA0 0x17059
MX6UL_PAD_SD1_DATA1__USDHC1_DATA1 0x17059
MX6UL_PAD_SD1_DATA2__USDHC1_DATA2 0x17059
MX6UL_PAD_SD1_DATA3__USDHC1_DATA3 0x17059
>;
};

...

The following problem occurs on our own image as well as on the prebuild fsl-imx-x11 (with our DTB in place):

cpu cpu0: dev_pm_opp_get_opp_count: device OPP not found (-19)

dhd_module_init in

Power-up adapter 'DHD generic adapter'

wifi_platform_bus_enumerate device present 1

------------[ cut here ]------------

WARNING: CPU: 0 PID: 1 at /home/bamboo/build/4.1.X-2.0.0_ga/fsl-imx-x11/temp_build_dir/build_fsl-imx-x11/tmp/work-shared/imx6ull14x14evk/kernel-source/drivers/mmc/host/sdhci-esdhc-imx.c:160 wifi_card_detect+0x54/0x5c()

Modules linked in:

CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.1.15-2.0.1+gb63f3f5 #1

Hardware name: Freescale i.MX6 Ultralite (Device Tree)

[<80015d78>] (unwind_backtrace) from [<8001271c>] (show_stack+0x10/0x14)

[<8001271c>] (show_stack) from [<807f54a0>] (dump_stack+0x84/0xc4)

[<807f54a0>] (dump_stack) from [<800357e0>] (warn_slowpath_common+0x80/0xb0)

[<800357e0>] (warn_slowpath_common) from [<800358ac>] (warn_slowpath_null+0x1c/0x24)

[<800358ac>] (warn_slowpath_null) from [<80587634>] (wifi_card_detect+0x54/0x5c)

[<80587634>] (wifi_card_detect) from [<80498e34>] (wifi_platform_bus_enumerate+0x5c/0x98)

[<80498e34>] (wifi_platform_bus_enumerate) from [<80499044>] (dhd_wifi_platform_load+0x138/0x39c)

[<80499044>] (dhd_wifi_platform_load) from [<803870a0>] (platform_drv_probe+0x44/0xac)

[<803870a0>] (platform_drv_probe) from [<8038593c>] (driver_probe_device+0x174/0x2b4)

[<8038593c>] (driver_probe_device) from [<80385b4c>] (__driver_attach+0x8c/0x90)

[<80385b4c>] (__driver_attach) from [<80383fc8>] (bus_for_each_dev+0x68/0x9c)

[<80383fc8>] (bus_for_each_dev) from [<803850cc>] (bus_add_driver+0x148/0x1f0)

[<803850cc>] (bus_add_driver) from [<8038614c>] (driver_register+0x78/0xf8)

[<8038614c>] (driver_register) from [<8049982c>] (dhd_wifi_platform_register_drv+0x1ac/0x1f8)

[<8049982c>] (dhd_wifi_platform_register_drv) from [<80009718>] (do_one_initcall+0x8c/0x1d4)

[<80009718>] (do_one_initcall) from [<80b18dbc>] (kernel_init_freeable+0x144/0x1e4)

[<80b18dbc>] (kernel_init_freeable) from [<807f1704>] (kernel_init+0x8/0xe8)

[<807f1704>] (kernel_init) from [<8000f528>] (ret_from_fork+0x14/0x2c)

---[ end trace 2c0c48362feb13e9 ]---

Unable to handle kernel NULL pointer dereference at virtual address 000001b8

pgd = 80004000

[000001b8] *pgd=00000000

Internal error: Oops: 5 [#1] PREEMPT SMP ARM

Modules linked in:

CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W       4.1.15-2.0.1+gb63f3f5 #1

Hardware name: Freescale i.MX6 Ultralite (Device Tree)

task: 88048000 ti: 8804c000 task.ti: 8804c000

PC is at _mmc_detect_change.constprop.13+0x8/0x68

LR is at wifi_platform_bus_enumerate+0x5c/0x98

pc : [<8056e84c>]    lr : [<80498e34>]    psr: 20000113

sp : 8804de08  ip : 00000000  fp : 00000000

r10: 00000000  r9 : 00000000  r8 : 80bbe114

r7 : 8804de38  r6 : 00000000  r5 : 00000001  r4 : 00000000

r3 : 00000000  r2 : 00000200  r1 : 00000000  r0 : 00000000

Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel

Control: 10c53c7d  Table: 8000406a  DAC: 00000015

Process swapper/0 (pid: 1, stack limit = 0x8804c210)

Stack: (0x8804de08 to 0x8804e000)

de00:                   00000000 80498e34 883c2f80 00000003 00000000 80499044

de20: 00000000 00000000 80c45a8c 80c4f5a4 00000000 00000000 8804de38 8804de38

de40: 880a1d28 80c4ad18 880f3210 80bbff50 fffffdfb 00000002 00000000 80b7d058

de60: 00000000 803870a0 80c4ad18 880f3210 80bbff50 00000000 00000002 8038593c

de80: 880f3210 80bbff50 880f3244 80bafec8 00000000 80385b4c 00000000 80bbff50

dea0: 80385ac0 80383fc8 8803095c 880ef5b4 80bbff50 883f8680 00000000 803850cc

dec0: 80a5370c 00000000 883c2f80 80bbff50 00000000 883c2f80 80c3b8f0 8038614c

dee0: 80c4f5a4 00000000 883c2f80 8049982c 80b89720 80b89720 883c2f80 80b57a4c

df00: 00000000 80b70514 80b7d058 80009718 80b704f0 80140f34 00000000 88031c00

df20: 00000000 80b91468 60000113 00000000 8bfffab6 8bfffab4 80828aa4 8004d564

df40: 00000000 809d7e0c 00000007 00000007 80b91450 00000134 00000007 80bf3000

df60: 00000134 00000007 80bf3000 80bf3000 80b70510 80b18dbc 00000007 00000007

df80: 80b18594 80051c24 00000000 807f16fc 00000000 00000000 00000000 00000000

dfa0: 00000000 807f1704 00000000 8000f528 00000000 00000000 00000000 00000000

dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000

dfe0: 00000000 00000000 00000000 00000000 00000013 00000000 fc9d77e7 7dd77faf

[<8056e84c>] (_mmc_detect_change.constprop.13) from [<00000003>] (0x3)

Code: eb0a12ef eaffffeb e92d4010 e1a03001 (e59021b8)

---[ end trace 2c0c48362feb13ea ]---

Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b

---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b

Looks like there is a problem with the card detect mechanism.

Any idea what we are doing wrong?

Many thanks,

Philip.

[amitkulkarni]

Hi Philip,

were you able to solve this problem ? 
I am also facing the same issue. Same error!

If you have solved it please let me know how!

[polyvection]

Hi Amit,

no, unfortunately not. 

Ended up using a different WiFi module.

Best,

Philip.

[amitkulkarni]

Oops! okay.. Thanks for the reply!

[igorpadykov]

Hi Philip

please try to get vendor support described on

wireless.murata.com/eng/products/rf-modules-1/wi-fi-bluetooth-for-freescale-i-mx.html

Best regards
igor
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