[Letux-kernel] [PATCH 2/5] DTS: MIPS: JZ4780: add USB PHY&OTG

[H. Nikolaus Schaller]

Hi,

> Am 21.09.2020 um 19:08 schrieb Zhou Yanjie <zhouyanjie at wanyeetech.com>:
> 
> 在 2020/9/22 上午12:58, H. Nikolaus Schaller 写道:
>> Hi,
>> 
>>> Am 21.09.2020 um 18:36 schrieb Zhou Yanjie <zhouyanjie at wanyeetech.com>:
>>> 
>>>> What *is* working is connecting the USB port to a host PC and running
>>>> the CI20 in client mode (e.g. g_ether).
>>>> 
>>>> That is already good progress!
>>> 
>>> Maybe you can try this patch. I tested it on CU1000-Neo and CU1830-Neo, and it can works in host mode, but I haven't tested it on CI20. My CI20 won't be able to come back to me until the weekend.
>>> 
>>> Thanks and best regards!
>> Mayby it was scrubbed somewhere... Please can you send it again?
> 
> 
> Ah, my fault, I forgot to add attachments.

Thanks! It is a new generic-PHY driver, that is nice!

Unfortunately:

[   10.961565] dwc2 13500000.usb: supply vusb_a not found, using dummy regulator
[   10.994543] dwc2_lowlevel_hw_init: 8
[   10.998163] dwc2_driver_probe: 2
[   11.001509] dwc2_driver_probe: 3
[   11.007437] dwc2 13500000.usb: registering common handler for irq21
[   11.025963] dwc2_driver_probe: 4
[   11.030817] dwc2 13500000.usb: Looking up vbus-supply from device tree
[   11.043473] dwc2 13500000.usb: Looking up vbus-supply property in node /usb at 13500000 failed
[   11.052065] dwc2_driver_probe: 5
[   11.058226] CPU 0 Unable to handle kernel paging request at virtual address 00000014, epc == 8045b054, ra == 8045b05c
[   10.986077] Oops[#1]:
[   10.988413] CPU: 0 PID: 1298 Comm: systemd-udevd Not tainted 5.9.0-rc5-letux-l400+ #3478
[   10.996555] $ 0   : 00000000 00000001 8045b044 8fa3c820
[   11.001819] $ 4   : 8fae6200 00000000 00000000 fffffffd
[   11.007079] $ 8   : 00000000 00000c00 00000000 fefefeff
[   11.012339] $12   : 8eb05448 77d45dc0 00000000 7fc02d54
[   11.017599] $16   : 00000000 fffffdf4 8fae63b8 8fa35410
[   11.022859] $20   : c0390000 00000000 00000000 c0390000
[   11.028121] $24   : 556f4af8 8006a47c                  
[   11.033379] $28   : 8ec4c000 8ec4dad0 c0380000 8045b05c
[   11.038637] Hi    : 00000000
[   11.041542] Lo    : 000005dc
[   11.044459] epc   : 8045b054 ingenic_usb_phy_power_on+0x10/0x4c
[   11.050418] ra    : 8045b05c ingenic_usb_phy_power_on+0x18/0x4c
[   11.056363] Status: 10000c03 KERNEL EXL IE 
[   11.060575] Cause : 80800008 (ExcCode 02)
[   10.977233] BadVA : 00000014
[   10.980139] PrId  : 3ee1024f (Ingenic XBurst)
[   10.984519] Modules linked in: ingenic_drm(+) dw_hdmi dm9000 gpio_ir_recv drm_kms_helper dwc2(+) gpio_keys mii pvrsrvkm_jz4780_sgx540_130 syscopyarea nvmem_jz4780_efuse rtc_pcf8563 sysfillrect sysimgblt fb_sys_fops drm drm_panel_orientation_quirks ipv6 autofs4
[   11.007710] Process systemd-udevd (pid: 1298, threadinfo=d81e60f6, task=be49d30b, tls=77e84790)
[   11.016463] Stack : 8ed66080 00000001 00000000 00000000 00000001 00000000 8fae6200 8045a7b8
[   11.024879]         8ed66080 8048eb04 8ed66080 8f829500 00000000 8ed66080 8ecb7700 c036e894
[   11.033302]         c0390000 80087a44 c0380000 c036f084 8ed66080 8ed66080 80087a10 8fa35400
[   11.041718]         c0380000 c036f0a0 8eb9e210 c0385d98 00000024 00000000 00000080 8fa39880
[   11.050133]         8ed66080 80a0f0c0 00000001 00000001 8fa39980 31c729d8 8fa35410 c038b354
[   11.058551]         ...
[   11.061025] Call Trace:
[   10.976129] [<8045b054>] ingenic_usb_phy_power_on+0x10/0x4c
[   10.981743] [<8045a7b8>] phy_power_on+0x94/0x114
[   10.986519] [<c036e894>] dwc2_lowlevel_hw_enable+0xf0/0x130 [dwc2]
[   10.992902] [<c036f0a0>] dwc2_driver_probe+0x514/0x9f4 [dwc2]
[   10.998799] [<804e3a6c>] platform_drv_probe+0x58/0xb4
[   11.003891] [<804e2380>] really_probe+0x1f0/0x470
[   11.008630] [<804e1b14>] driver_probe_device+0x1d8/0x224
[   11.013977] [<804e1dc8>] device_driver_attach+0x6c/0x94
[   11.019237] [<804e1f0c>] __driver_attach+0x11c/0x138
[   11.024250] [<804df818>] bus_for_each_dev+0x70/0xc0
[   11.029162] [<804e0ac0>] bus_add_driver+0x110/0x1f0
[   11.034067] [<804e2a30>] driver_register+0xcc/0x120
[   11.038974] [<80010e30>] do_one_initcall+0xb8/0x298
[   11.043882] [<800c7910>] do_init_module+0x74/0x204
[   11.048701] [<800c61e4>] load_module+0x139c/0x1934
[   11.053519] [<800c6974>] sys_finit_module+0xb0/0xe0
[   11.058429] [<80022498>] syscall_common+0x34/0x58
[   10.975779] Code: afbf001c  afb00018  8c900040 <0c1285b7> 8e040014  10400009  8fbf001c  3c05809e  8e040008 
[   10.985591] 
[   10.989159] ---[ end trace 3424477db7f6dae6 ]---
[   10.997115] Kernel panic - not syncing: Fatal exception
[   11.002439] Rebooting in 10 seconds..

Do we have to specify some power controller in DTS for using ingenic_usb_phy_power_on()?

BR and thanks,
Nikolaus