linux-kernel - Re: [RFC PATCH v1 19/19] rtw88: Add support for the SDIO based RTL8821CS chipset

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Date:   Wed, 4 Jan 2023 21:59:35 +0200
From:   Bitterblue Smith <rtl8821cerfe2@...il.com>
To:     Chris Morgan <macroalpha82@...il.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc:     linux-wireless@...r.kernel.org,
        Yan-Hsuan Chuang <tony0620emma@...il.com>,
        Kalle Valo <kvalo@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        linux-mmc@...r.kernel.org, Nitin Gupta <nitin.gupta981@...il.com>,
        Neo Jou <neojou@...il.com>, Pkshih <pkshih@...ltek.com>,
        Jernej Skrabec <jernej.skrabec@...il.com>
Subject: Re: [RFC PATCH v1 19/19] rtw88: Add support for the SDIO based
 RTL8821CS chipset

On 04/01/2023 01:01, Chris Morgan wrote:
> On Wed, Dec 28, 2022 at 12:30:20AM +0100, Martin Blumenstingl wrote:
>> Wire up RTL8821CS chipset support using the new rtw88 SDIO HCI code as
>> well as the existing RTL8821C chipset code.
>>
> 
> Unfortunately, this doesn't work for me. I applied it on top of 6.2-rc2
> master and I get errors during probe (it appears the firmware never
> loads).
> 
> Relevant dmesg logs are as follows:
> 
> [    0.989545] mmc2: new high speed SDIO card at address 0001
> [    0.989993] rtw_8821cs mmc2:0001:1: Firmware version 24.8.0, H2C version 12
> [    1.005684] rtw_8821cs mmc2:0001:1: sdio write32 failed (0x14): -110
> [    1.005737] rtw_8821cs mmc2:0001:1: sdio read32 failed (0x1080): -110
> [    1.005789] rtw_8821cs mmc2:0001:1: sdio write32 failed (0x11080): -110
> [    1.005840] rtw_8821cs mmc2:0001:1: sdio read8 failed (0x3): -110
> [    1.005920] rtw_8821cs mmc2:0001:1: sdio read8 failed (0x1103): -110
> [    1.005998] rtw_8821cs mmc2:0001:1: sdio read32 failed (0x80): -110
> [    1.006078] rtw_8821cs mmc2:0001:1: sdio read32 failed (0x1700): -110
> 
> The error of "sdio read32 failed (0x1700): -110" then repeats several
> hundred times, then I get this:
> 
> [    1.066294] rtw_8821cs mmc2:0001:1: failed to download firmware
> [    1.066367] rtw_8821cs mmc2:0001:1: sdio read16 failed (0x80): -110
> [    1.066417] rtw_8821cs mmc2:0001:1: sdio read8 failed (0x100): -110
> [    1.066697] rtw_8821cs mmc2:0001:1: failed to setup chip efuse info
> [    1.066703] rtw_8821cs mmc2:0001:1: failed to setup chip information
> [    1.066839] rtw_8821cs: probe of mmc2:0001:1 failed with error -16
> 
> The hardware I am using is an rtl8821cs that I can confirm was working
> with a previous driver.
> 
> Thank you.
> 
The USB-based RTL8811CU also doesn't work, with suspiciously similar
errors:

Dec 25 21:43:37 home kernel: rtw_8821cu 1-2:1.0: Firmware version 24.11.0, H2C version 12
Dec 25 21:43:37 home kernel: rtw_8821cu 1-2:1.0 wlp0s20f0u2: renamed from wlan0
Dec 25 21:43:40 home kernel: rtw_8821cu 1-2:1.0: read register 0x5 failed with -110
Dec 25 21:43:41 home kernel: rtw_8821cu 1-2:1.0: read register 0x20 failed with -110
Dec 25 21:44:11 home kernel: rtw_8821cu 1-2:1.0: write register 0x20 failed with -110
Dec 25 21:44:12 home kernel: rtw_8821cu 1-2:1.0: read register 0x7c failed with -110
Dec 25 21:44:43 home kernel: rtw_8821cu 1-2:1.0: write register 0x7c failed with -110
Dec 25 21:44:44 home kernel: rtw_8821cu 1-2:1.0: read register 0x1080 failed with -110
Dec 25 21:45:16 home kernel: rtw_8821cu 1-2:1.0: write register 0x1080 failed with -110


Dec 25 21:46:47 home kernel: rtw_8821cu 1-3:1.0: Firmware version 24.11.0, H2C version 12
Dec 25 21:46:47 home kernel: rtw_8821cu 1-3:1.0 wlp0s20f0u3: renamed from wlan0
Dec 25 21:46:55 home kernel: rtw_8821cu 1-3:1.0: failed to poll offset=0x5 mask=0x1 value=0x0
Dec 25 21:46:55 home kernel: rtw_8821cu 1-3:1.0: mac power on failed
Dec 25 21:46:55 home kernel: rtw_8821cu 1-3:1.0: failed to power on mac

I tested with https://github.com/lwfinger/rtw88/ which should have the
same code as wireless-next currently.