Linux/WL1831MOD: AM335x - not polling wifi module on boot

Richard McAleer

Part Number: WL1831MOD

Tool/software: Linux

Hi
I am working on a project where the board is closely based on a beaglebone black.
I have recently got my hands on a new revision of our board (fixing connections to the wifi module) and I am looking to get the Wl1831MOD up and running.

I am trying to follow the instructions in
- processors.wiki.ti.com/.../WL18xx_Platform_Integration_Guide
- processors.wiki.ti.com/.../WiLink8_Linux_Getting_Started_Guide
but not having much success.

I cannot see any attempt to talk to the module at startup, or when I try and start wpa_supplicant
- there is no activity on the line I am using for the WLAN_ENABLE (GPIO1_25 - BALL U16)

I am using the pre-built binary for the kernel that shipped with the dev kit I am using.
The kernel it contains is:

root@am335x-evm:~# uname -a
Linux am335x-evm 4.4.19-gdb0b54cdad #1 PREEMPT Mon Oct 3 17:43:46 EDT 2016 armv7l GNU/Linux

I have modified our device tree based on the examples given and our schematics.

The entries I have put in my device-tree are:

wlan_en_reg: fixedregulator@2 {
compatible = "regulator-fixed";
pinctrl-names = "default";
pinctrl-0 = <&wlan_reg_gpio>;
regulator-name = "wlan-en-regulator";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
startup-delay-us = <700000>;

gpio = <&gpio1 25 GPIO_ACTIVE_HIGH>;
enable-active-high;
};

&am33xx_pinmux {
wifi_mmc_pins_default: wifi_mmc_pins_default {
pinctrl-single,pins = <
0x80 ( PIN_INPUT_PULLUP | MUX_MODE2 ) /* (U9) gpmc_csn1.mmc1_clk */
0x84 ( PIN_INPUT_PULLUP | MUX_MODE2 ) /* (V9) gpmc_csn2.mmc1_cmd */
0x0 ( PIN_INPUT_PULLUP | MUX_MODE1 ) /* (U7) gpmc_ad0.mmc1_dat0 */
0x4 ( PIN_INPUT_PULLUP | MUX_MODE1 ) /* (V7) gpmc_ad1.mmc1_dat1 */
0x8 ( PIN_INPUT_PULLUP | MUX_MODE1 ) /* (R8) gpmc_ad2.mmc1_dat2 */
0xc ( PIN_INPUT_PULLUP | MUX_MODE1 ) /* (T8) gpmc_ad3.mmc1_dat3 */
>;
};

wifi_mmc_pins_sleep: wifi_mmc_pins_sleep {
pinctrl-single,pins = <
0x80 ( PIN_INPUT_PULLDOWN | MUX_MODE7 ) /* (U9) gpmc_csn1.mmc1_clk */
0x84 ( PIN_INPUT_PULLDOWN | MUX_MODE7) /* (V9) gpmc_csn2.mmc1_cmd */
0x0 ( PIN_INPUT_PULLDOWN | MUX_MODE7) /* (U7) gpmc_ad0.mmc1_dat0 */
0x4 ( PIN_INPUT_PULLDOWN | MUX_MODE7) /* (V7) gpmc_ad1.mmc1_dat1 */
0x8 ( PIN_INPUT_PULLDOWN | MUX_MODE7) /* (R8) gpmc_ad2.mmc1_dat2 */
0xc ( PIN_INPUT_PULLDOWN | MUX_MODE7) /* (T8) gpmc_ad3.mmc1_dat3 */
>;
};

/* wl12xx/wl18xx card enable/irq GPIOs. */
wlan_pins_default: wlan_pins_default {
pinctrl-single,pins = <
0x64 (PIN_OUTPUT_PULLDOWN | MUX_MODE7) /* gpmc_a9.rgmii2_rd2 */
0x68 (PIN_INPUT | MUX_MODE7) /* gpmc_a10.rgmii2_rd1 */ 
>;
};

wlan_pins_sleep: wlan_pins_sleep {
pinctrl-single,pins = <
0x64 (PIN_OUTPUT_PULLDOWN | MUX_MODE7) /* gpmc_a9.rgmii2_rd2 */
0x68 (PIN_INPUT | MUX_MODE7) /* gpmc_a10.rgmii2_rd1 */
>;
};
wlan_reg_gpio: wlan_reg_gpio {
pinctrl-single,pins = <
0x64 (PIN_OUTPUT_PULLDOWN | MUX_MODE7) /* gpmc_a9.rgmii2_rd2 */
>;
};
};
&mmc2 {
status = "okay";
vmmc-supply = <&wlan_en_reg>;
bus-width = <4>;
pinctrl-names = "default";
pinctrl-0 = <&wifi_mmc_pins_default &wlan_pins_default>;

ti,non-removable;
ti,needs-special-hs-handling;
cap-power-off-card;
keep-power-in-suspend;

#address-cells = <1>;
#size-cells = <0>;
wlcore: wlcore@0 {
compatible = "ti,wl1831";
reg = <2>;
interrupt-parent = <&gpio1>;
interrupts = <26 IRQ_TYPE_EDGE_RISING>; 
};
};

( I have also experimented with removing the pulls on the mmc1 pinmuxes without any success)

I have attached a copy of a startup log.

full_dmesg.txt

root@am335x-evm:~# dmesg
[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Initializing cgroup subsys cpuacct
[    0.000000] Linux version 4.4.19-gdb0b54cdad (gtbldadm@ubuntu-16) (gcc version 5.3.1 20160113 (Linaro GCC 5.3-2016.02) ) #1 PREEMPT Mon Oct 3 17:43:46 EDT 2016
[    0.000000] CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=10c5387d
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[    0.000000] Machine model: Compumedics Argo
[    0.000000] cma: Reserved 24 MiB at 0x8d000000
[    0.000000] Memory policy: Data cache writeback
[    0.000000] On node 0 totalpages: 65536
[    0.000000] free_area_init_node: node 0, pgdat c09546d4, node_mem_map cfdad000
[    0.000000]   Normal zone: 576 pages used for memmap
[    0.000000]   Normal zone: 0 pages reserved
[    0.000000]   Normal zone: 65536 pages, LIFO batch:15
[    0.000000] CPU: All CPU(s) started in SVC mode.
[    0.000000] AM335X ES2.1 (neon )
[    0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
[    0.000000] pcpu-alloc: [0] 0 
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 64960
[    0.000000] Kernel command line: console=ttyO0,115200n8 root=PARTUUID=1eb3b9b3-02 rw rootfstype=ext4 rootwait
[    0.000000] PID hash table entries: 1024 (order: 0, 4096 bytes)
[    0.000000] Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
[    0.000000] Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
[    0.000000] Memory: 224976K/262144K available (6551K kernel code, 314K rwdata, 2396K rodata, 264K init, 265K bss, 12592K reserved, 24576K cma-reserved, 0K highmem)
[    0.000000] Virtual kernel memory layout:
                   vector  : 0xffff0000 - 0xffff1000   (   4 kB)
                   fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
                   vmalloc : 0xd0800000 - 0xff800000   ( 752 MB)
                   lowmem  : 0xc0000000 - 0xd0000000   ( 256 MB)
                   pkmap   : 0xbfe00000 - 0xc0000000   (   2 MB)
                   modules : 0xbf000000 - 0xbfe00000   (  14 MB)
                     .text : 0xc0008000 - 0xc08c5004   (8949 kB)
                     .init : 0xc08c6000 - 0xc0908000   ( 264 kB)
                     .data : 0xc0908000 - 0xc0956b10   ( 315 kB)
                      .bss : 0xc0956b10 - 0xc0999258   ( 266 kB)
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.000000] Preemptible hierarchical RCU implementation.
[    0.000000]  Build-time adjustment of leaf fanout to 32.
[    0.000000] NR_IRQS:16 nr_irqs:16 16
[    0.000000] IRQ: Found an INTC at 0xfa200000 (revision 5.0) with 128 interrupts
[    0.000000] OMAP clockevent source: timer2 at 25000000 Hz
[    0.000020] sched_clock: 32 bits at 25MHz, resolution 40ns, wraps every 85899345900ns
[    0.000052] clocksource: timer1: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 76450417870 ns
[    0.000067] OMAP clocksource: timer1 at 25000000 Hz
[    0.000289] clocksource_probe: no matching clocksources found
[    0.000523] Console: colour dummy device 80x30
[    0.000558] WARNING: Your 'console=ttyO0' has been replaced by 'ttyS0'
[    0.000567] This ensures that you still see kernel messages. Please
[    0.000574] update your kernel commandline.
[    0.000598] Calibrating delay loop... 597.60 BogoMIPS (lpj=2988032)
[    0.118784] pid_max: default: 32768 minimum: 301
[    0.118953] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[    0.118969] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[    0.119877] Initializing cgroup subsys io
[    0.119920] Initializing cgroup subsys memory
[    0.119970] Initializing cgroup subsys devices
[    0.119990] Initializing cgroup subsys freezer
[    0.120009] Initializing cgroup subsys perf_event
[    0.120026] Initializing cgroup subsys pids
[    0.120062] CPU: Testing write buffer coherency: ok
[    0.120589] Setting up static identity map for 0x80008200 - 0x80008258
[    0.123472] devtmpfs: initialized
[    0.139797] VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 3
[    0.158910] omap_hwmod: debugss: _wait_target_disable failed
[    0.216239] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[    0.219174] pinctrl core: initialized pinctrl subsystem
[    0.220863] NET: Registered protocol family 16
[    0.223661] DMA: preallocated 256 KiB pool for atomic coherent allocations
[    0.248794] cpuidle: using governor ladder
[    0.278780] cpuidle: using governor menu
[    0.284387] gpiochip_add: registered GPIOs 0 to 31 on device: gpio
[    0.284807] OMAP GPIO hardware version 0.1
[    0.285802] gpiochip_add: registered GPIOs 32 to 63 on device: gpio
[    0.286844] gpiochip_add: registered GPIOs 64 to 95 on device: gpio
[    0.287850] gpiochip_add: registered GPIOs 96 to 127 on device: gpio
[    0.298899] hw-breakpoint: debug architecture 0x4 unsupported.
[    0.340107] edma 49000000.edma: TI EDMA DMA engine driver
[    0.340603] of_get_named_gpiod_flags: can't parse 'gpio' property of node '/fixedregulator@0[0]'
[    0.341094] of_get_named_gpiod_flags: parsed 'gpio' property of node '/fixedregulator@2[0]' - status (0)
[    0.345413] omap_i2c 44e0b000.i2c: could not find pctldev for node /ocp/l4_wkup@44c00000/scm@210000/pinmux@800/pinmux_i2c0_pins, deferring probe
[    0.345604] media: Linux media interface: v0.10
[    0.345684] Linux video capture interface: v2.00
[    0.345762] pps_core: LinuxPPS API ver. 1 registered
[    0.345773] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
[    0.345812] PTP clock support registered
[    0.345881] EDAC MC: Ver: 3.0.0
[    0.347430] omap-mailbox 480c8000.mailbox: omap mailbox rev 0x400
[    0.347858] Advanced Linux Sound Architecture Driver Initialized.
[    0.349562] clocksource: Switched to clocksource timer1
[    0.364182] NET: Registered protocol family 2
[    0.365229] TCP established hash table entries: 2048 (order: 1, 8192 bytes)
[    0.365279] TCP bind hash table entries: 2048 (order: 1, 8192 bytes)
[    0.365316] TCP: Hash tables configured (established 2048 bind 2048)
[    0.365418] UDP hash table entries: 256 (order: 0, 4096 bytes)
[    0.365444] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[    0.365647] NET: Registered protocol family 1
[    0.366176] RPC: Registered named UNIX socket transport module.
[    0.366197] RPC: Registered udp transport module.
[    0.366206] RPC: Registered tcp transport module.
[    0.366215] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    0.366247] PCI: CLS 0 bytes, default 64
[    0.367452] hw perfevents: enabled with armv7_cortex_a8 PMU driver, 5 counters available
[    0.370301] futex hash table entries: 256 (order: -1, 3072 bytes)
[    0.381394] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[    0.382620] NFS: Registering the id_resolver key type
[    0.382717] Key type id_resolver registered
[    0.382729] Key type id_legacy registered
[    0.382836] ntfs: driver 2.1.32 [Flags: R/O].
[    0.387632] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 248)
[    0.387677] io scheduler noop registered
[    0.387698] io scheduler deadline registered
[    0.387915] io scheduler cfq registered (default)
[    0.389968] pinctrl-single 44e10800.pinmux: 142 pins at pa f9e10800 size 568
[    0.474623] Serial: 8250/16550 driver, 10 ports, IRQ sharing disabled
[    0.480292] 44e09000.serial: ttyS0 at MMIO 0x44e09000 (irq = 158, base_baud = 3000000) is a 8250
[    1.073908] console [ttyS0] enabled
[    1.079112] 48022000.serial: ttyS1 at MMIO 0x48022000 (irq = 159, base_baud = 3000000) is a 8250
[    1.089672] 48024000.serial: ttyS2 at MMIO 0x48024000 (irq = 160, base_baud = 3000000) is a 8250
[    1.099993] [drm] Initialized drm 1.1.0 20060810
[    1.106104] panel panel: GPIO lookup for consumer enable
[    1.106123] panel panel: using device tree for GPIO lookup
[    1.106141] of_get_named_gpiod_flags: can't parse 'enable-gpios' property of node '/panel[0]'
[    1.106156] of_get_named_gpiod_flags: can't parse 'enable-gpio' property of node '/panel[0]'
[    1.106169] panel panel: using lookup tables for GPIO lookup
[    1.106183] panel panel: lookup for GPIO enable failed
[    1.115347] loop: module loaded
[    1.124656] libphy: Fixed MDIO Bus: probed
[    1.189661] davinci_mdio 4a101000.mdio: davinci mdio revision 1.6
[    1.195814] davinci_mdio 4a101000.mdio: no live phy, scanning all
[    1.202359] davinci_mdio: probe of 4a101000.mdio failed with error -5
[    1.223637] cpsw 4a100000.ethernet: Detected MACID = 98:5d:ad:4e:d2:5e
[    1.246493] mousedev: PS/2 mouse device common for all mice
[    1.253171] i2c /dev entries driver
[    1.258050] cpuidle: enable-method property 'ti,am3352' found operations
[    1.266012] omap_hsmmc 48060000.mmc: GPIO lookup for consumer cd
[    1.266037] omap_hsmmc 48060000.mmc: using device tree for GPIO lookup
[    1.266078] of_get_named_gpiod_flags: parsed 'cd-gpios' property of node '/ocp/mmc@48060000[0]' - status (0)
[    1.266179] omap_hsmmc 48060000.mmc: Got CD GPIO
[    1.270963] omap_hsmmc 48060000.mmc: GPIO lookup for consumer wp
[    1.270980] omap_hsmmc 48060000.mmc: using device tree for GPIO lookup
[    1.270997] of_get_named_gpiod_flags: can't parse 'wp-gpios' property of node '/ocp/mmc@48060000[0]'
[    1.271011] of_get_named_gpiod_flags: can't parse 'wp-gpio' property of node '/ocp/mmc@48060000[0]'
[    1.271025] omap_hsmmc 48060000.mmc: using lookup tables for GPIO lookup
[    1.271040] omap_hsmmc 48060000.mmc: lookup for GPIO wp failed
[    1.310475] omap_hsmmc 481d8000.mmc: GPIO lookup for consumer cd
[    1.310504] omap_hsmmc 481d8000.mmc: using device tree for GPIO lookup
[    1.310522] of_get_named_gpiod_flags: can't parse 'cd-gpios' property of node '/ocp/mmc@481d8000[0]'
[    1.310537] of_get_named_gpiod_flags: can't parse 'cd-gpio' property of node '/ocp/mmc@481d8000[0]'
[    1.310550] omap_hsmmc 481d8000.mmc: using lookup tables for GPIO lookup
[    1.310565] omap_hsmmc 481d8000.mmc: lookup for GPIO cd failed
[    1.310582] omap_hsmmc 481d8000.mmc: GPIO lookup for consumer wp
[    1.310594] omap_hsmmc 481d8000.mmc: using device tree for GPIO lookup
[    1.310607] of_get_named_gpiod_flags: can't parse 'wp-gpios' property of node '/ocp/mmc@481d8000[0]'
[    1.310620] of_get_named_gpiod_flags: can't parse 'wp-gpio' property of node '/ocp/mmc@481d8000[0]'
[    1.310633] omap_hsmmc 481d8000.mmc: using lookup tables for GPIO lookup
[    1.310645] omap_hsmmc 481d8000.mmc: lookup for GPIO wp failed
[    1.346969] mmc0: host does not support reading read-only switch, assuming write-enable
[    1.357094] mmc0: new high speed SDHC card at address 59b4
[    1.363510] mmcblk0: mmc0:59b4       1.84 GiB 
[    1.369962]  mmcblk0: p1 p2
[    1.430476] of_get_named_gpiod_flags: parsed 'gpios' property of node '/leds/led@2[0]' - status (0)
[    1.430821] of_get_named_gpiod_flags: parsed 'gpios' property of node '/leds/led@3[0]' - status (0)
[    1.431019] of_get_named_gpiod_flags: parsed 'gpios' property of node '/leds/led@4[0]' - status (0)
[    1.431202] of_get_named_gpiod_flags: parsed 'gpios' property of node '/leds/led@5[0]' - status (0)
[    1.431851] ledtrig-cpu: registered to indicate activity on CPUs
[    1.452174] NET: Registered protocol family 10
[    1.470751] sit: IPv6 over IPv4 tunneling driver
[    1.476495] NET: Registered protocol family 17
[    1.489983] Key type dns_resolver registered
[    1.494507] omap_voltage_late_init: Voltage driver support not added
[    1.547669] tps65217 0-0024: TPS65217 ID 0xe version 1.2
[    1.559936] at24 0-0050: 32768 byte 24c256 EEPROM, writable, 1 bytes/write
[    1.566890] omap_i2c 44e0b000.i2c: bus 0 rev0.11 at 400 kHz
[    1.591994] hctosys: unable to open rtc device (rtc0)
[    1.612048] ALSA device list:
[    1.615071]   No soundcards found.
[    1.670631] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
[    1.678888] VFS: Mounted root (ext4 filesystem) on device 179:2.
[    1.707888] devtmpfs: mounted
[    1.720054] Freeing unused kernel memory: 264K (c08c6000 - c0908000)
[    1.726439] This architecture does not have kernel memory protection.
[    2.022458] systemd[1]: System time before build time, advancing clock.
[    2.107648] random: systemd: uninitialized urandom read (16 bytes read, 13 bits of entropy available)
[    2.136851] random: systemd: uninitialized urandom read (16 bytes read, 13 bits of entropy available)
[    2.183694] systemd[1]: systemd 229 running in system mode. (+PAM -AUDIT -SELINUX +IMA -APPARMOR +SMACK +SYSVINIT +UTMP -LIBCRYPTSETUP -GCRYPT +GNUTLS +ACL +
XZ -LZ4 -SECCOMP +BLKID -ELFUTILS +KMOD -IDN)
[    2.230555] systemd[1]: Detected architecture arm.
[    2.261482] systemd[1]: Set hostname to <am335x-evm>.
[    2.386996] random: systemd-sysv-ge: uninitialized urandom read (16 bytes read, 16 bits of entropy available)
[    2.439065] random: systemd-gpt-aut: uninitialized urandom read (16 bytes read, 16 bits of entropy available)
[    2.478635] random: systemd-sysv-ge: uninitialized urandom read (16 bytes read, 17 bits of entropy available)
[    2.499714] random: systemd-gpt-aut: uninitialized urandom read (16 bytes read, 17 bits of entropy available)
[    2.529135] random: systemd-sysv-ge: uninitialized urandom read (16 bytes read, 18 bits of entropy available)
[    2.660404] random: systemd: uninitialized urandom read (16 bytes read, 22 bits of entropy available)
[    2.680355] random: systemd: uninitialized urandom read (16 bytes read, 22 bits of entropy available)
[    2.701633] random: systemd: uninitialized urandom read (16 bytes read, 22 bits of entropy available)
[    3.020458] systemd[1]: [/etc/systemd/system/gadget-init.service:15] Unknown lvalue 'ExecStopPre' in section 'Service'
[    3.435451] systemd[1]: sysinit.target: Found ordering cycle on sysinit.target/start
[    3.443481] systemd[1]: sysinit.target: Found dependency on alignment.service/start
[    3.451335] systemd[1]: sysinit.target: Found dependency on basic.target/start
[    3.458617] systemd[1]: sysinit.target: Found dependency on sockets.target/start
[    3.466098] systemd[1]: sysinit.target: Found dependency on avahi-daemon.socket/start
[    3.474005] systemd[1]: sysinit.target: Found dependency on sysinit.target/start
[    3.481475] systemd[1]: sysinit.target: Breaking ordering cycle by deleting job alignment.service/start
[    3.490955] systemd[1]: alignment.service: Job alignment.service/start deleted to break ordering cycle starting with sysinit.target/start
[    3.540974] systemd[1]: Created slice System Slice.
[    3.572056] systemd[1]: Created slice system-getty.slice.
[    3.601965] systemd[1]: Created slice system-serial\x2dgetty.slice.
[    3.630191] systemd[1]: Reached target Remote File Systems.
[    3.660888] systemd[1]: Listening on Network Service Netlink Socket.
[    3.690482] systemd[1]: Listening on udev Control Socket.
[    3.721697] systemd[1]: Created slice User and Session Slice.
[    3.750086] systemd[1]: Reached target Slices.
[    3.770484] systemd[1]: Started Forward Password Requests to Wall Directory Watch.
[    3.800646] systemd[1]: Listening on Journal Socket.
[    3.835825] systemd[1]: Starting Remount Root and Kernel File Systems...
[    3.897707] systemd[1]: Starting Setup Virtual Console...
[    3.928005] EXT4-fs (mmcblk0p2): re-mounted. Opts: (null)
[    4.016441] systemd[1]: Starting Load Kernel Modules...
[    4.065687] cryptodev: driver 1.8 loaded.
[    4.076713] systemd[1]: Mounting POSIX Message Queue File System...
[    4.140802] systemd[1]: Started Dispatch Password Requests to Console Directory Watch.
[    4.170425] systemd[1]: Listening on Syslog Socket.
[    4.217643] systemd[1]: Listening on Journal Socket (/dev/log).
[    4.257009] systemd[1]: Mounting Temporary Directory...
[    4.296063] systemd[1]: Mounting Debug File System...
[    4.366697] systemd[1]: Starting Journal Service...
[    4.400345] systemd[1]: Reached target Swap.
[    4.430652] systemd[1]: Reached target Paths.
[    4.476713] systemd[1]: Starting Create list of required static device nodes for the current kernel...
[    4.560622] systemd[1]: Listening on /dev/initctl Compatibility Named Pipe.
[    4.600716] systemd[1]: Listening on udev Kernel Socket.
[    4.674052] systemd[1]: Mounted POSIX Message Queue File System.
[    4.700442] systemd[1]: Mounted Debug File System.
[    4.730290] systemd[1]: Mounted Temporary Directory.
[    4.761069] systemd[1]: Started Journal Service.
[    6.968418] systemd-journald[96]: Received request to flush runtime journal from PID 1
[    9.037363] am335x-phy-driver 47401300.usb-phy: GPIO lookup for consumer reset
[    9.037409] am335x-phy-driver 47401300.usb-phy: using device tree for GPIO lookup
[    9.037437] of_get_named_gpiod_flags: can't parse 'reset-gpios' property of node '/ocp/usb@47400000/usb-phy@47401300[0]'
[    9.037453] of_get_named_gpiod_flags: can't parse 'reset-gpio' property of node '/ocp/usb@47400000/usb-phy@47401300[0]'
[    9.037468] am335x-phy-driver 47401300.usb-phy: using lookup tables for GPIO lookup
[    9.037483] am335x-phy-driver 47401300.usb-phy: lookup for GPIO reset failed
[    9.037500] am335x-phy-driver 47401300.usb-phy: GPIO lookup for consumer vbus-detect
[    9.037512] am335x-phy-driver 47401300.usb-phy: using device tree for GPIO lookup
[    9.037526] of_get_named_gpiod_flags: can't parse 'vbus-detect-gpios' property of node '/ocp/usb@47400000/usb-phy@47401300[0]'
[    9.037540] of_get_named_gpiod_flags: can't parse 'vbus-detect-gpio' property of node '/ocp/usb@47400000/usb-phy@47401300[0]'
[    9.037553] am335x-phy-driver 47401300.usb-phy: using lookup tables for GPIO lookup
[    9.037567] am335x-phy-driver 47401300.usb-phy: lookup for GPIO vbus-detect failed
[    9.037657] 47401300.usb-phy supply vcc not found, using dummy regulator
[    9.239270] omap_wdt: OMAP Watchdog Timer Rev 0x01: initial timeout 60 sec
[    9.322866] rtc rtc0: 44e3e000.rtc: dev (254:0)
[    9.322934] omap_rtc 44e3e000.rtc: rtc core: registered 44e3e000.rtc as rtc0
[    9.821462] omap_rng 48310000.rng: OMAP Random Number Generator ver. 20
[   10.353805] omap-sham 53100000.sham: hw accel on OMAP rev 4.3
[   10.626145]  remoteproc0: wkup_m3 is available
[   10.698768]  remoteproc0: Note: remoteproc is still under development and considered experimental.
[   10.789133]  remoteproc0: THE BINARY FORMAT IS NOT YET FINALIZED, and backward compatibility isn't yet guaranteed.
[   11.149815]  remoteproc0: powering up wkup_m3
[   11.155842]  remoteproc0: Booting fw image am335x-pm-firmware.elf, size 217148
[   11.279106] omap-aes 53500000.aes: OMAP AES hw accel rev: 3.2
[   11.285585]  remoteproc0: remote processor wkup_m3 is now up
[   11.285612] wkup_m3_ipc 44e11324.wkup_m3_ipc: CM3 Firmware Version = 0x191
[   11.707872] omap_hwmod: pruss: _wait_target_ready failed: -16
[   11.803420] ti-pruss 4a300000.pruss: couldn't enable pruss
[   11.809106] ti-pruss: probe of 4a300000.pruss failed with error -16
[   11.957815] omap_hwmod: gfx: failed to hardreset
[   12.151582] pvrsrvkm 56000000.sgx: Unable to reset SGX!
[   12.232214] omap_hwmod: gfx: _wait_target_ready failed: -16
[   12.283693] PVR_K:(Error): EnableSGXClocks: pm_runtime_get_sync failed (16)
[   12.352684] PVR_K:(Error): SysInitialise: Failed to Enable system clocks (175)
[   12.572015] PM: bootloader does not support rtc-only!
[   13.717434] FAT-fs (mmcblk0p1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
[   16.526393] usbcore: registered new interface driver usbfs
[   16.624338] usbcore: registered new interface driver hub
[   16.681407] usbcore: registered new device driver usb
[   16.824580] musb-hdrc: ConfigData=0xde (UTMI-8, dyn FIFOs, bulk combine, bulk split, HB-ISO Rx, HB-ISO Tx, SoftConn)
[   16.824624] musb-hdrc: MHDRC RTL version 2.0 
[   16.824638] musb-hdrc: setup fifo_mode 4
[   16.824666] musb-hdrc: 28/31 max ep, 16384/16384 memory
[   16.824884] musb-hdrc musb-hdrc.0.auto: MUSB HDRC host driver
[   16.871339] musb-hdrc musb-hdrc.0.auto: new USB bus registered, assigned bus number 1
[   16.931679] hub 1-0:1.0: USB hub found
[   16.951210] hub 1-0:1.0: 1 port detected
[   19.037453] net eth0: initializing cpsw version 1.12 (0)
[   19.101316] net eth0: initialized cpsw ale version 1.4
[   19.106513] net eth0: ALE Table size 1024
[   19.253425] libphy: PHY 4a101000.mdio:00 not found
[   19.340858] net eth0: phy "4a101000.mdio:00" not found on slave 0, err -19
[   19.432536] libphy: PHY 4a101000.mdio:01 not found
[   19.520814] net eth0: phy "4a101000.mdio:01" not found on slave 1, err -19
[   19.608129] Bluetooth: Core ver 2.21
[   19.666628] NET: Registered protocol family 31
[   19.688898] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[   19.724037] using random self ethernet address
[   19.728547] using random host ethernet address
[   19.735278] Bluetooth: HCI device and connection manager initialized
[   19.790569] using host ethernet address: 98:5D:AD:4E:D2:60
[   19.797418] Bluetooth: HCI socket layer initialized
[   19.834327] using random self ethernet address
[   19.838840] using random host ethernet address
[   19.844344] Bluetooth: L2CAP socket layer initialized
[   19.850802] random: nonblocking pool is initialized
[   19.876519] Bluetooth: SCO socket layer initialized
[   19.916176] using host ethernet address: 98:5D:AD:4E:D2:60
[   19.956607] NET: Registered protocol family 15
[   19.983016] usb0: HOST MAC 98:5d:ad:4e:d2:60
[   20.052708] usb0: MAC 7e:63:da:cc:21:96
[   20.165094] Mass Storage Function, version: 2009/09/11
[   20.191889] LUN: removable file: (no medium)
[   20.196669] LUN: removable read only file: /dev/mmcblk0p1
[   20.281035] Number of LUNs=1
[   20.318838] g_multi gadget: Multifunction Composite Gadget
[   20.367169] g_multi gadget: g_multi ready
[   20.622445] IPv6: ADDRCONF(NETDEV_UP): usb0: link is not ready
[   20.672176] g_multi gadget: high-speed config #1: Multifunction with RNDIS
[   20.681092] IPv6: ADDRCONF(NETDEV_CHANGE): usb0: link becomes ready
[   21.150188] Initializing XFRM netlink socket
[   45.011902] cfg80211: World regulatory domain updated:
[   45.017161] cfg80211:  DFS Master region: unset
[   45.028247] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[   45.048136] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[   45.066611] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[   45.075764] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm), (N/A)
[   45.089999] cfg80211:   (5170000 KHz - 5250000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (N/A)
[   45.107075] cfg80211:   (5250000 KHz - 5330000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (0 s)
[   45.122411] cfg80211:   (5490000 KHz - 5730000 KHz @ 160000 KHz), (N/A, 2000 mBm), (0 s)
[   45.137091] cfg80211:   (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A)
[   45.149770] cfg80211:   (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm), (N/A)

I can see mention of the fixedregulator

[ 0.341094] of_get_named_gpiod_flags: parsed 'gpio' property of node '/fixedregulator@2[0]' - status (0)

However the only mentions of mmc2 in the logs are indirect:

[ 1.310436] omap_hsmmc 481d8000.mmc: GPIO lookup for consumer cd
[ 1.310464] omap_hsmmc 481d8000.mmc: using device tree for GPIO lookup
[ 1.310484] of_get_named_gpiod_flags: can't parse 'cd-gpios' property of node '/ocp/mmc@481d8000[0]'
[ 1.310499] of_get_named_gpiod_flags: can't parse 'cd-gpio' property of node '/ocp/mmc@481d8000[0]'
[ 1.310512] omap_hsmmc 481d8000.mmc: using lookup tables for GPIO lookup
[ 1.310525] omap_hsmmc 481d8000.mmc: lookup for GPIO cd failed
[ 1.310543] omap_hsmmc 481d8000.mmc: GPIO lookup for consumer wp
[ 1.310555] omap_hsmmc 481d8000.mmc: using device tree for GPIO lookup
[ 1.310568] of_get_named_gpiod_flags: can't parse 'wp-gpios' property of node '/ocp/mmc@481d8000[0]'
[ 1.310581] of_get_named_gpiod_flags: can't parse 'wp-gpio' property of node '/ocp/mmc@481d8000[0]'
[ 1.311674] omap_hsmmc 481d8000.mmc: using lookup tables for GPIO lookup
[ 1.311690] omap_hsmmc 481d8000.mmc: lookup for GPIO wp failed

if I try and bring up the wifi using

wpa_supplicant -Dnl80211 -iwlan0 -cwpa_supplicant.conf

I get

Successfully initialized wpa_supplicant
Could not read interface wlan0 flags: No such device
nl80211: Driver does not support authentication/association or connect commands
nl80211: deinit ifname=wlan0 disabled_11b_rates=0
Could not read interface wlan0 flags: No such device
wlan0: Failed to initialize driver interface
root@am335x-evm:~# [ 45.725153] cfg80211: World regulatory domain updated:
[ 45.730603] cfg80211: DFS Master region: unset
[ 45.735083] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 45.752698] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 45.770200] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 45.778290] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm), (N/A)
[ 45.805108] cfg80211: (5170000 KHz - 5250000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (N/A)
[ 45.826734] cfg80211: (5250000 KHz - 5330000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (0 s)
[ 45.836554] cfg80211: (5490000 KHz - 5730000 KHz @ 160000 KHz), (N/A, 2000 mBm), (0 s)
[ 45.849775] cfg80211: (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A)
[ 45.857868] cfg80211: (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm), (N/A)

I found mention in a previous post of checking the mmc clock control; it looks as though the value I have in this register is the default.

root@am335x-evm:~# devmem2 0x44E000F4 w
/dev/mem opened.
Memory mapped at address 0xb6f11000.
Read at address 0x44E000F4 (0xb6f110f4): 0x00030000

would this be preventing the probe of the module?

where should I be setting this? does it need done explicitly in u-boot? - or should it be done as part of the probe?

I notice from the other wlcore capable DTS in the code that there are differences between how the fixed regulators are defined with respect to having a pinctrl-0 element.
Should this be present?

Thanks for any help that anyone can provide: I suspect there is something obvious I have missed.

In the meantime I'll keep digging.

All the best,
Richard

over 6 years ago

0 Hari Nagalla over 6 years ago

TI__Mastermind 27080 points

I suppose, the wlcore, wl18xx drivers are built as modules.. You can, try to uninstall and install the modules.
# cd /usr/share/wl18xx
#./unload_wlcore.sh
#./load_wlcore.sh

Do, a lsmod and see, if the modules are loaded..

0 Richard McAleer over 6 years ago in reply to Hari Nagalla

Expert 1485 points

Hi Hari

Thanks for the advice.

I've tried as you suggest; here's what I see. (I've not worked though the significance of these results yet)

It appears as though the drivers are not loaded at boot.

calling the load script I see:

root@am335x-evm:/usr/share/wl18xx# ./load_wlcore.sh 
root@am335x-evm:/usr/share/wl18xx# [  134.111508] cfg80211: World regulatory domain updated:
[  134.116741] cfg80211:  DFS Master region: unset
[  134.147531] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[  134.179820] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[  134.187939] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[  134.229845] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm), (N/A)
[  134.237963] cfg80211:   (5170000 KHz - 5250000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (N/A)
[  134.286510] cfg80211:   (5250000 KHz - 5330000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (0 s)
[  134.321927] cfg80211:   (5490000 KHz - 5730000 KHz @ 160000 KHz), (N/A, 2000 mBm), (0 s)
[  134.356387] cfg80211:   (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A)
[  134.388376] cfg80211:   (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm), (N/A)

after which the list of modules reported by lsmod has changed

Before

After

root@am335x-evm:~# lsmod
Module Size Used by
sha512_generic 9903 0
sha512_arm 12079 0
drbg 13425 1
des_generic 17736 0
cbc 2324 0
xfrm_user 22606 2
xfrm4_tunnel 2040 0
ipcomp 2257 0
xfrm_ipcomp 4311 1 ipcomp
esp4 6466 0
ah4 5627 0
bluetooth 327425 2
af_key 26406 0
xfrm_algo 6970 5 ah4,esp4,af_key,xfrm_user,xfrm_ipcomp
usb_f_acm 5404 1
u_serial 11555 3 usb_f_acm
usb_f_ecm 6620 1
g_multi 6330 0
usb_f_mass_storage 37916 2 g_multi
usb_f_rndis 15406 2 g_multi
u_ether 13577 3 usb_f_ecm,usb_f_rndis,g_multi
libcomposite 44392 5 usb_f_acm,usb_f_ecm,usb_f_rndis,g_multi,usb_f_mass_storage
configfs 26917 6 usb_f_acm,usb_f_ecm,usb_f_rndis,libcomposite,usb_f_mass_storage
musb_dsps 8235 0
musb_hdrc 71550 1 musb_dsps
udc_core 12063 2 musb_hdrc,libcomposite
usbcore 195125 1 musb_hdrc
pm33xx 5577 0
pru_rproc 11582 0
pruss_intc 7163 1 pru_rproc
ecb 1909 0
wkup_m3_ipc 7715 1 pm33xx
sha256_generic 9503 1
hmac 2735 1
wkup_m3_rproc 3669 1
ti_emif_sram 6242 1 pm33xx
md5 1897 0
sha1_generic 2621 0
sha1_arm_neon 6261 0
sha1_arm 3862 1 sha1_arm_neon
pvrsrvkm 406903 0
pruss 10892 1 pru_rproc
omap_aes_driver 19430 0
remoteproc 26901 4 pruss,wkup_m3_rproc,pru_rproc,wkup_m3_ipc
omap_sham 21513 0
virtio 7742 1 remoteproc
virtio_ring 12035 1 remoteproc
omap_rng 4482 0
rng_core 7794 1 omap_rng
musb_am335x 1426 0
rtc_omap 8272 1
omap_wdt 4634 0
sch_fq_codel 8289 3
cryptodev 38007 1

root@am335x-evm:/usr/share/wl18xx# lsmod
Module Size Used by
wlcore_sdio 6771 0
wl18xx 85364 0
wlcore 183907 1 wl18xx
mac80211 359061 2 wl18xx,wlcore
cfg80211 221299 3 mac80211,wl18xx,wlcore
sha512_generic 9903 0
sha512_arm 12079 0
drbg 13425 1
des_generic 17736 0
cbc 2324 0
xfrm_user 22606 2
xfrm4_tunnel 2040 0
ipcomp 2257 0
xfrm_ipcomp 4311 1 ipcomp
esp4 6466 0
usb_f_acm 5404 1
u_serial 11555 3 usb_f_acm
ah4 5627 0
bluetooth 327425 2
af_key 26406 0
xfrm_algo 6970 5 ah4,esp4,af_key,xfrm_user,xfrm_ipcomp
usb_f_ecm 6620 1
g_multi 6330 0
usb_f_mass_storage 37916 2 g_multi
usb_f_rndis 15406 2 g_multi
u_ether 13577 3 usb_f_ecm,usb_f_rndis,g_multi
libcomposite 44392 5 usb_f_acm,usb_f_ecm,usb_f_rndis,g_multi,usb_f_mass_storage
configfs 26917 6 usb_f_acm,usb_f_ecm,usb_f_rndis,libcomposite,usb_f_mass_storage
musb_dsps 8235 0
musb_hdrc 71550 1 musb_dsps
udc_core 12063 2 musb_hdrc,libcomposite
usbcore 195125 1 musb_hdrc
pm33xx 5577 0
pru_rproc 11582 0
pruss_intc 7163 1 pru_rproc
ecb 1909 0
ti_emif_sram 6242 1 pm33xx
wkup_m3_ipc 7715 1 pm33xx
sha256_generic 9503 1
hmac 2735 1
md5 1897 0
wkup_m3_rproc 3669 1
sha1_generic 2621 0
sha1_arm_neon 6261 0
sha1_arm 3862 1 sha1_arm_neon
pvrsrvkm 406903 0
pruss 10892 1 pru_rproc
omap_aes_driver 19430 0
omap_sham 21513 0
remoteproc 26901 4 pruss,wkup_m3_rproc,pru_rproc,wkup_m3_ipc
virtio 7742 1 remoteproc
virtio_ring 12035 1 remoteproc
omap_rng 4482 0
rng_core 7794 1 omap_rng
musb_am335x 1426 0
rtc_omap 8272 1
omap_wdt 4634 0
sch_fq_codel 8289 3
cryptodev 38007 1

however there is still no wlan0 after running this

root@am335x-evm:/usr/share/wl18xx# ip link show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN mode DEFAULT group default qlen 1000
    link/ether 98:5d:ad:4e:d2:5e brd ff:ff:ff:ff:ff:ff
3: sit0@NONE: <NOARP> mtu 1480 qdisc noop state DOWN mode DEFAULT group default qlen 1
    link/sit 0.0.0.0 brd 0.0.0.0
4: usb0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
    link/ether b2:50:8d:0b:1f:46 brd ff:ff:ff:ff:ff:ff

and I do not see the WLAN_ENABLE line throw that I expected the fixed regulator to control

Trying to start wpa_supplicant gives the same issue seen previously

root@am335x-evm:~# wpa_supplicant -Dnl80211 -iwlan0 -c/usr/share/wl18xx/wpa_supplicant.conf
Successfully initialized wpa_supplicant
Could not read interface wlan0 flags: No such device
nl80211: Driver does not support authentication/association or connect commands
nl80211: deinit ifname=wlan0 disabled_11b_rates=0
Could not read interface wlan0 flags: No such device
wlan0: Failed to initialize driver interface

calling the unload shell script complains about two missing drivers:

root@am335x-evm:~# /usr/share/wl18xx/unload_wlcore.sh 
rmmod: ERROR: Module wl12xx is not currently loaded
rmmod: ERROR: Module compat is not currently loaded
killall: wpa_supplicant: no process killed
killall: hostapd: no process killed

I imaging that the wl12xx might not matter if I have wl18xx loaded?
However a missing compat driver might be significant?

From the documentation I have found on the TI wiki I expected that this wifi module should work with the pre-built binaries and filesystem:
- do you know why it appears to require this compat driver which is not there?

Thanks for your help; I'll keep digging

All the best

Richard

0 Eyal Reizer over 6 years ago in reply to Richard McAleer

TI__Mastermind 20285 points

Hi Richard,

Are you using a custom made am335x board which is based on the am335x-evm.
You need to make sure that during kernel boot you see a message indicating that the wl18xx was detected on the sdio bus.
You didn't include a full kernel boot log but I guess this is not the case here.

The module is probably not probed during boot (I wlan_enable pin turning on?) so the module are not probed automatically as they should.

In addition, What is:
wlan_reg_gpio: wlan_reg_gpio {
pinctrl-single,pins = <
0x64 (PIN_OUTPUT_PULLDOWN | MUX_MODE7) /* gpmc_a9.rgmii2_rd2 */

Seems like you already have it as part of:
wlan_pins_default: wlan_pins_default {
..

Doesn't seem like it is needed.

Best Regards,
Eyal

0 Richard McAleer over 6 years ago in reply to Eyal Reizer

Expert 1485 points

Hi Eyal

yes you are right our custom board has taken influences from both the beagle bone black and the EVM.

I thought I had attached a boot log file to my original post.
I will attach another here as I have recompiled the kernel with dynamic debug and there is quite a lot more information.

I removed the reference to the pinmux in the fixedregulator that you mentioned: i noticed that there was a complaint by the kernel when unflattening the tree

You are correct that I cannot at present see the wl18xx being detected at boot (or at anypoint after e.g. when loading the modules)

The most salient clue I think I have found from my digging thus far is:

[   15.678840] mmc1: error -16 whilst initialising SDIO card

which would appear to indicate that it is busy - why I am not yet sure

The current kernel boot log should be attached here >>

of_debug_kernel_init.txt

I would be grateful for any insight that might give.

I will try and dig further - probably concentrating on the mmc module logging

Thanks for any advice.

All the best,

Richard

0 Richard McAleer over 6 years ago in reply to Eyal Reizer

Expert 1485 points

Hi Eyal

I tried to reply with a boot log attached - it was probably sufficiently large to run foul of moderation?
I will be more brief here!
you are right, our custom board has taken influences from both the beagle bone black and the EVM.

There was a log attached to my original post (e2e.ti.com/.../full_5F00_dmesg.txt) that might show something

Since then I have removed the reference to the pinmux in the fixedregulator that you mentioned: (i noticed that there was a complaint by the kernel when unflattening the tree)

You are correct that I cannot at present see the wl18xx being detected at boot (or at anypoint after e.g. when loading the modules)

The most salient clue I think I have found from my digging thus far is:

[ 15.678840] mmc1: error -16 whilst initialising SDIO card

I will concentrate on enabling the logging in this area to see what I can find: hopefully my delayed post will turn up shortly with a link to the verbose start up, this might show something.

All the best,
Richard

0 Eyal Reizer over 6 years ago in reply to Richard McAleer

TI__Mastermind 20285 points

Hi Richard,

[ 15.678840] mmc1: error -16 whilst initialising SDIO card

I suggest trying to start with a slow sdio clock (1Mhz) and see is the issue is related to the sdio bus hardware setup.
Add:
max-frequency = <1000000>;

to the mmc node in your .dts file and see if it helps.

best regards,
eyal

0 Richard McAleer over 6 years ago in reply to Eyal Reizer

Expert 1485 points

Hi Eyal

I will try that as soon as I am next with the hardware.

Would that would be preventing the Enable line (as configured in the fixedregulator gpio property) from throwing?

I can imagine having the bus too fast causing errors but given I do not see an attempt to enable the module I thought the problem might be more fundamental than that (though I am the first to admit I am new to this stack)

Thanks for the suggestion - I will report back as soon as I can

Best regards,

Richard

0 Eyal Reizer over 6 years ago in reply to Richard McAleer

TI__Mastermind 20285 points

Hi Richard,

It seems like wlan_enable was high as it started probing.
Something went wring during the probe and you got the " mmc1: error -16 whilst initialising SDIO card" error and it stopped probing.

Let's see if lowering the bus speed helps here or not.

BR,
Eyal

0 Richard McAleer over 6 years ago in reply to Eyal Reizer

Expert 1485 points

Thanks Eyal

I've added the frequency cap.

I can see the enable line throw
I can see activity on both the CLK and CMD lines; on both sides of the level translator we are using (a TXB0108DQS with awkwardly small pitch for probing!) .

The error on boot is the same:

[ 3.935631] mmc1: error -16 whilst initialising SDIO card

I will try and dig in the code as to why this is being reported

The mmc node on the device tree at present looks like:

root@am335x-evm:/proc/device-tree/ocp/mmc@481d8000# find . -type f -print -exec hexdump -C {} \;
./reg
00000000  48 1d 80 00 00 00 10 00                           |H.......|
00000008
./dmas
00000000  00 00 00 2d 00 00 00 02  00 00 00 00 00 00 00 2d  |...-...........-|
00000010  00 00 00 03 00 00 00 00                           |........|
00000018
./name
00000000  6d 6d 63 00                                       |mmc.|
00000004
./interrupts
00000000  00 00 00 1c                                       |....|
00000004
./vmmc-supply
00000000  00 00 00 3b                                       |...;|
00000004
./pinctrl-0
00000000  00 00 00 3c 00 00 00 3d                           |...<...=|
00000008
./compatible
00000000  74 69 2c 6f 6d 61 70 34  2d 68 73 6d 6d 63 00     |ti,omap4-hsmmc.|
0000000f
./ti,non-removable
./clock-frequency
00000000  01 c9 c3 80                                       |....|
00000004
./bus-width
00000000  00 00 00 04                                       |....|
00000004
./ti,needs-special-hs-handling
./status
00000000  6f 6b 61 79 00                                    |okay.|
00000005
./cap-power-off-card
./max-frequency
00000000  00 0f 42 40                                       |..B@|
00000004
./#address-cells
00000000  00 00 00 01                                       |....|
00000004
./keep-power-in-suspend
./ti,hwmods
00000000  6d 6d 63 32 00                                    |mmc2.|
00000005
./#size-cells
00000000  00 00 00 00                                       |....|
00000004
./wlcore@0/reg
00000000  00 00 00 02                                       |....|
00000004
./wlcore@0/name
00000000  77 6c 63 6f 72 65 00                              |wlcore.|
00000007
./wlcore@0/interrupts
00000000  00 00 00 1a 00 00 00 01                           |........|
00000008
./wlcore@0/compatible
00000000  74 69 2c 77 6c 31 38 33  31 00                    |ti,wl1831.|
0000000a
./wlcore@0/interrupt-parent
00000000  00 00 00 3e                                       |...>|
00000004
./dma-names
00000000  74 78 00 72 78 00                                 |tx.rx.|
00000006
./pinctrl-names
00000000  64 65 66 61 75 6c 74 00                           |default.|
00000008
./ti,needs-special-reset
./interrupt-parent
00000000  00 00 00 01                                       |....|
00000004
root@am335x-evm:/proc/device-tree/ocp/mmc@481d8000#

I'll keep on digging; thanks for any suggestions

Best regards,

Richard

0 Richard McAleer over 6 years ago in reply to Richard McAleer

Expert 1485 points

I am surprised by what I see for mmc1 under the debugfs

mmc0

mmc1

root@am335x-evm:/sys/kernel/debug/mmc0# find -type f -print -exec cat {} \;
./mmc0:59b4/status
00000900
./mmc0:59b4/state
0x00000005
./regs
mmc0:
sdio irq mode polling
ctx_loss: 1

regs:
CON: 0x00000600
PSTATE: 0x01f20000
HCTL: 0x00000d06
SYSCTL: 0x000e0087
IE: 0x00000000
ISE: 0x00000000
CAPA: 0x06e10080
./clock
50000000
./ios
clock: 50000000 Hz
vdd: 21 (3.3 ~ 3.4 V)
bus mode: 2 (push-pull)
chip select: 0 (don't care)
power mode: 2 (on)
bus width: 2 (4 bits)
timing spec: 2 (sd high-speed)
signal voltage: 0 (3.30 V)
driver type: 0 (driver type B)

root@am335x-evm:/sys/kernel/debug/mmc1# find -type f -print -exec cat {} \;
./regs
mmc1:
sdio irq mode polling
ctx_loss: 1

regs:
CON: 0x00000600
PSTATE: 0x01070000
HCTL: 0x00000b00
SYSCTL: 0x000e0007
IE: 0x00000000
ISE: 0x00000000
CAPA: 0x04e10080
./clock
0
./ios
clock: 0 Hz
vdd: 0 (invalid)
bus mode: 2 (push-pull)
chip select: 0 (don't care)
power mode: 0 (off)
bus width: 0 (1 bits)
timing spec: 0 (legacy)
signal voltage: 0 (1.80 V)
driver type: 0 (driver type B)
root@am335x-evm:/sys/kernel/debug/mmc1#

I'm guess that the contents of mmc1 here have reverted after the probing at boot? as they do not match the values in the device tree under /proc

Best regards

- Richard

0 Eyal Reizer over 6 years ago in reply to Richard McAleer

TI__Mastermind 20285 points

hi Richard,

You can't get any meaningful data from this proc entry as when the initialization stops the mmc interface is turned off...

Best Regards,

Eyal

0 Richard McAleer over 6 years ago in reply to Eyal Reizer

Expert 1485 points

Thanks Eyal

that's pretty much what i suspected

I can see that the error is being thrown in __mmc_start_request as host->ops->card_busy(host) is always true
- just need to work out why

All the best,
- Richard

0 Richard McAleer over 6 years ago in reply to Richard McAleer

Expert 1485 points

I have managed to find the module at boot by modifying the node as below

&mmc2 {
status = "okay";
vmmc-supply = <&wlan_en_reg>;
bus-width = <4>;
pinctrl-names = "default";//,"sleep";
pinctrl-0 = <&wifi_mmc_pins_default &wlan_pins_default>;
//pinctrl-1 = <&wifi_mmc_pins_sleep &wlan_pins_sleep>;
ti,non-removable;
//ti,needs-special-hs-handling;
cap-power-off-card;
keep-power-in-suspend;
max-frequency = <1000000>;

#address-cells = <1>;
#size-cells = <0>;

wlcore: wlcore@2 {
compatible = "ti,wl1831";
reg = <2>;
interrupt-parent = <&gpio1>;
interrupts = <26 IRQ_TYPE_EDGE_RISING>; 
};
};

- as far as I can see it is really only the ti,needs-special-hs-handling; parameter that has changed

I had lifted this from the definition in the am335x-evm.dts

When would this be required?

Thanks for the help.

Best regards

Richard

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