Hello Steffen,
On 08.03.24 12:17, Steffen Trumtrar wrote:
> To support HS200 mode, the arasan needs a differernt sdhci_wait_idle
> function. Remove the default CMD_INHIBIT_DATA, otherwise the sdhci hs200
> tuning will timeout.
AFAICS, this new sdhci_wait_idle2 is what Linux does by default. Given
that we will want to replace existing sdhci_wait_idle with the new
version, I think you should rename the old one to sdhci_wait_idle_data()
or similar and add sdhci_wait_idle2 without the 2.
> + mask = SDHCI_CMD_INHIBIT_CMD;
> +
> + if (data || (cmd->resp_type & MMC_RSP_BUSY))
> + mask |= SDHCI_CMD_INHIBIT_DATA;
Here cmd is de-referenced unconditionally.
> +
> + if (cmd && cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
> + mask &= ~SDHCI_CMD_INHIBIT_DATA;
Here, it's checked after the fact. Can you add a cmd && check in the hunk
before too?
Cheers,
Ahmad
> +
> + ret = wait_on_timeout(10 * MSECOND,
> + !(sdhci_read32(host, SDHCI_PRESENT_STATE) & mask));
> +
> + if (ret) {
> + dev_err(host->mci->hw_dev,
> + "SDHCI timeout while waiting for idle\n");
> + return -EBUSY;
> + }
> +
> + return 0;
> +}
> +
> int sdhci_wait_idle(struct sdhci *host, struct mci_cmd *cmd)
> {
> u32 mask;
> diff --git a/drivers/mci/sdhci.h b/drivers/mci/sdhci.h
> index 80916e670f..80c3f98c9c 100644
> --- a/drivers/mci/sdhci.h
> +++ b/drivers/mci/sdhci.h
> @@ -307,6 +307,7 @@ static inline void sdhci_write8(struct sdhci *host, int
> reg, u32 val)
> #define SDHCI_NO_DMA DMA_ERROR_CODE
> int sdhci_execute_tuning(struct sdhci *sdhci, u32 opcode);
> int sdhci_wait_idle(struct sdhci *host, struct mci_cmd *cmd);
> +int sdhci_wait_idle2(struct sdhci *host, struct mci_cmd *cmd, struct
> mci_data *data);
> int sdhci_wait_for_done(struct sdhci *host, u32 mask);
> void sdhci_read_response(struct sdhci *host, struct mci_cmd *cmd);
> void sdhci_set_cmd_xfer_mode(struct sdhci *host, struct mci_cmd *cmd,
>
--
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