> From: Wolfram Sang [mailto:wsa@xxxxxxxxxxxxx] > Sent: Thursday, November 10, 2016 11:29 PM > To: linux-wireless@xxxxxxxxxxxxxxx > Cc: Amitkumar Karwar; Nishant Sarmukadam; Kalle Valo > Subject: Problems getting mwifiex with sd8887 to work > > Hi, > > I am trying to get a SD8887 based SDIO card to work with my Renesas H3 > Salvator-X board. The card is either a u-blox emmy-w1-evk or a ZComax > AC-180M, I am evaluating both. I really prefer to run the upstream > driver instead of the paperwork protected and surprisingly old custom > ones. > > However, for both cards, I run into an error I cannot parse: > > [ 4.028588] mwifiex_sdio mmc2:0001:1: mwifiex_process_cmdresp: cmd > 0x242 failed during initialization > > I use a v4.9-rc2 based tree called 'renesas-drives' [1] which has a few > Renesas specific patches on top but nothing mwifiex related AFAICT. I > use the firmware from the linux-firmware tree. > > Any further use of the interface mlan0 or reading eeprom via debugfs > will result in a timeout. > > [ 18.146710] mwifiex_sdio mmc2:0001:1: mwifiex_cmd_timeout_func: > Timeout cmd id = 0x10, act = 0x1 > > I assume this is a follow-up problem so I skip the logs for these > timeouts (can easily send them, of course, in case they are > interesting). I'll attach a full debug output from mwifiex from > insertion until the initial 0x242 error. > > For full disclaimer, I am the maintainer of the underlying Renesas SD > driver and I want to use this setup to create a test scenario for SDIO > with UHS speeds. So, if there is something wrong in the SD part, I'll > happily hack on that. > > But for now, I simply would need a starting point :) 0x242 is > "HostCmd_CMD_CHAN_REGION_CFG". Could this mean it cannot load > configuration data? I did search around but couldn't find anything > useful. 0x242 command failure is expected for sd8887, as It's not supported. Driver shouldn't abort initialization in this case. You can try below change. I will prepare a patch to send this command based on firmware version/capability. ------- @ -2304,8 +2304,8 @@ int mwifiex_sta_init_cmd(struct mwifiex_private *priv, u8 first_sta, bool init) return -1; } - mwifiex_send_cmd(priv, HostCmd_CMD_CHAN_REGION_CFG, - HostCmd_ACT_GEN_GET, 0, NULL, true); +// mwifiex_send_cmd(priv, HostCmd_CMD_CHAN_REGION_CFG, +// HostCmd_ACT_GEN_GET, 0, NULL, true); } --------- Regards, Amitkumar
