On Sun, 12 Dec 2021 at 16:00, Martin Blumenstingl
<martin.blumenstingl@xxxxxxxxxxxxxx> wrote:
>
> The vendor driver implements special handling for multi-block
> SD_IO_RW_DIRECT and SD_IO_RW_EXTENDED commands. It sets the MANUAL_STOP
> bit in the MESON_SDHC_MISC register for these commands. In All other
> cases this bit is cleared.
>
> This fixes SDIO wifi using the brcmfmac driver which reported the
> following error without this change on a Netxeon S82 board using a
> Meson8 (S802) SoC:
> brcmf_fw_alloc_request: using brcm/brcmfmac43362-sdio for chip
> BCM43362/1
> brcmf_sdiod_ramrw: membytes transfer failed
> brcmf_sdio_download_code_file: error -110 on writing 219557 membytes
> at 0x00000000
> brcmf_sdio_download_firmware: dongle image file download failed
>
> And with this change:
> brcmf_fw_alloc_request: using brcm/brcmfmac43362-sdio for chip
> BCM43362/1
> brcmf_c_process_clm_blob: no clm_blob available (err=-2), device may
> have limited channels available
> brcmf_c_preinit_dcmds: Firmware: BCM43362/1 wl0: Apr 22 2013 14:50:00
> version 5.90.195.89.6 FWID 01-b30a427d
>
> Fixes: e4bf1b0970ef96 ("mmc: host: meson-mx-sdhc: new driver for the Amlogic Meson SDHC host")
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx>
> ---
> drivers/mmc/host/meson-mx-sdhc-mmc.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/drivers/mmc/host/meson-mx-sdhc-mmc.c b/drivers/mmc/host/meson-mx-sdhc-mmc.c
> index 7cd9c0ec2fcf..a89190d479cf 100644
> --- a/drivers/mmc/host/meson-mx-sdhc-mmc.c
> +++ b/drivers/mmc/host/meson-mx-sdhc-mmc.c
> @@ -135,6 +135,7 @@ static void meson_mx_sdhc_start_cmd(struct mmc_host *mmc,
> struct mmc_command *cmd)
> {
> struct meson_mx_sdhc_host *host = mmc_priv(mmc);
> + bool manual_stop = false;
> u32 ictl, send;
> int pack_len;
>
> @@ -172,12 +173,20 @@ static void meson_mx_sdhc_start_cmd(struct mmc_host *mmc,
> else
> /* software flush: */
> ictl |= MESON_SDHC_ICTL_DATA_XFER_OK;
> +
Maybe add a comment to explain a bit about this workaround here?
> + manual_stop = cmd->data->blocks > 1 &&
> + (cmd->opcode == SD_IO_RW_DIRECT ||
SD_IO_RW_DIRECT doesn't have cmd->data, so checking for that command
doesn't make sense.
> + cmd->opcode == SD_IO_RW_EXTENDED);
> } else {
> pack_len = 0;
>
> ictl |= MESON_SDHC_ICTL_RESP_OK;
> }
>
> + regmap_update_bits(host->regmap, MESON_SDHC_MISC,
> + MESON_SDHC_MISC_MANUAL_STOP,
> + manual_stop ? MESON_SDHC_MISC_MANUAL_STOP : 0);
> +
> if (cmd->opcode == MMC_STOP_TRANSMISSION)
> send |= MESON_SDHC_SEND_DATA_STOP;
>
> --
> 2.34.1
>
Kind regards
Uffe
