[PATCH] mci: sdhci: Add and use common sdhci_wait_for_done()
Rouven Czerwinski
r.czerwinski at pengutronix.de
Mon Mar 27 06:01:31 PDT 2023
Hi,
On Tue, 2023-03-21 at 10:50 +0100, Sascha Hauer wrote:
> We have different driver specific variants of functions polling for the
> device ready in the tree. Add a common sdhci_wait_for_done() and use
> it where appropriate. This fixes a few deficiencies with the driver
> specific variants.
>
> rk_sdhci_wait_for_done() didn't check the SDHCI_INT_TIMEOUT bit and
> returned -EPERM instead when it ought to return -ETIMEDOUT. The core
> tries to detect a SD card first and expects a -ETIMEDOUT for the setup
> command when really a eMMC is connected. Only with a -ETIMEDOUT the core
> tries to detect a eMMC next.
>
> at91_sdhci_wait_for_done() returned the status instead of the expected
> 0 value for success.
I had to revert this commit to run barebox_update on the CM3 RK3566.
Otherwise writes to the boot partition would hang indefinitely.
Best regards,
Rouven Czerwinski
>
> Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
> ---
> drivers/mci/arasan-sdhci.c | 29 +---------------------------
> drivers/mci/atmel-sdhci-common.c | 28 +--------------------------
> drivers/mci/rockchip-dwcmshc-sdhci.c | 25 +-----------------------
> drivers/mci/sdhci.c | 27 ++++++++++++++++++++++++++
> drivers/mci/sdhci.h | 1 +
> 5 files changed, 31 insertions(+), 79 deletions(-)
>
> diff --git a/drivers/mci/arasan-sdhci.c b/drivers/mci/arasan-sdhci.c
> index 00a8ceed68..650de22b69 100644
> --- a/drivers/mci/arasan-sdhci.c
> +++ b/drivers/mci/arasan-sdhci.c
> @@ -133,33 +133,6 @@ static void arasan_sdhci_set_ios(struct mci_host *mci, struct mci_ios *ios)
> sdhci_write8(&host->sdhci, SDHCI_HOST_CONTROL, val);
> }
>
> -static int arasan_sdhci_wait_for_done(struct arasan_sdhci_host *host, u32 mask)
> -{
> - u64 start = get_time_ns();
> - u32 stat;
> -
> - do {
> - stat = sdhci_read32(&host->sdhci, SDHCI_INT_STATUS);
> -
> - if (stat & SDHCI_INT_TIMEOUT)
> - return -ETIMEDOUT;
> -
> - if (stat & SDHCI_INT_ERROR) {
> - dev_err(host->mci.hw_dev, "SDHCI_INT_ERROR: 0x%08x\n",
> - stat);
> - return -EPERM;
> - }
> -
> - if (is_timeout(start, 1000 * MSECOND)) {
> - dev_err(host->mci.hw_dev,
> - "SDHCI timeout while waiting for done\n");
> - return -ETIMEDOUT;
> - }
> - } while ((stat & mask) != mask);
> -
> - return 0;
> -}
> -
> static void print_error(struct arasan_sdhci_host *host, int cmdidx, int ret)
> {
> if (ret == -ETIMEDOUT)
> @@ -213,7 +186,7 @@ static int arasan_sdhci_send_cmd(struct mci_host *mci, struct mci_cmd *cmd,
> sdhci_write32(&host->sdhci, SDHCI_ARGUMENT, cmd->cmdarg);
> sdhci_write16(&host->sdhci, SDHCI_COMMAND, command);
>
> - ret = arasan_sdhci_wait_for_done(host, mask);
> + ret = sdhci_wait_for_done(&host->sdhci, mask);
> if (ret)
> goto error;
>
> diff --git a/drivers/mci/atmel-sdhci-common.c b/drivers/mci/atmel-sdhci-common.c
> index 05a019beb6..58ba0b9b3d 100644
> --- a/drivers/mci/atmel-sdhci-common.c
> +++ b/drivers/mci/atmel-sdhci-common.c
> @@ -89,32 +89,6 @@ exit:
> return is_inserted;
> }
>
> -static int at91_sdhci_wait_for_done(struct at91_sdhci *host, u32 mask)
> -{
> - struct sdhci *sdhci = &host->sdhci;
> - u32 status;
> - int ret;
> -
> - ret = sdhci_read32_poll_timeout(sdhci, SDHCI_INT_STATUS, status,
> - (status & mask) == mask || (status & SDHCI_INT_ERROR),
> - USEC_PER_SEC);
> -
> - if (ret < 0) {
> - dev_err(host->dev, "SDHCI timeout while waiting for done\n");
> - return ret;
> - }
> -
> - if (status & SDHCI_INT_TIMEOUT)
> - return -ETIMEDOUT;
> -
> - if (status & SDHCI_INT_ERROR) {
> - dev_err(host->dev, "SDHCI_INT_STATUS: 0x%08x\n", status);
> - return -EPERM;
> - }
> -
> - return status & 0xFFFF;
> -}
> -
> int at91_sdhci_send_command(struct at91_sdhci *host, struct mci_cmd *cmd,
> struct mci_data *data)
> {
> @@ -158,7 +132,7 @@ int at91_sdhci_send_command(struct at91_sdhci *host, struct mci_cmd *cmd,
> sdhci_write32(sdhci, SDHCI_ARGUMENT, cmd->cmdarg);
> sdhci_write16(sdhci, SDHCI_COMMAND, command);
>
> - status = at91_sdhci_wait_for_done(host, mask);
> + status = sdhci_wait_for_done(&host->sdhci, mask);
> if (status < 0)
> goto error;
>
> diff --git a/drivers/mci/rockchip-dwcmshc-sdhci.c b/drivers/mci/rockchip-dwcmshc-sdhci.c
> index 4b4e8b7bd6..e055a8ea71 100644
> --- a/drivers/mci/rockchip-dwcmshc-sdhci.c
> +++ b/drivers/mci/rockchip-dwcmshc-sdhci.c
> @@ -216,29 +216,6 @@ static void rk_sdhci_set_ios(struct mci_host *mci, struct mci_ios *ios)
> sdhci_write8(&host->sdhci, SDHCI_HOST_CONTROL, val);
> }
>
> -static int rk_sdhci_wait_for_done(struct rk_sdhci_host *host, u32 mask)
> -{
> - u64 start = get_time_ns();
> - u16 stat;
> -
> - do {
> - stat = sdhci_read16(&host->sdhci, SDHCI_INT_NORMAL_STATUS);
> - if (stat & SDHCI_INT_ERROR) {
> - dev_dbg(host->mci.hw_dev, "SDHCI_INT_ERROR: 0x%08x\n",
> - sdhci_read16(&host->sdhci, SDHCI_INT_ERROR_STATUS));
> - return -EPERM;
> - }
> -
> - if (is_timeout(start, 1000 * MSECOND)) {
> - dev_err(host->mci.hw_dev,
> - "SDHCI timeout while waiting for done\n");
> - return -ETIMEDOUT;
> - }
> - } while ((stat & mask) != mask);
> -
> - return 0;
> -}
> -
> static void print_error(struct rk_sdhci_host *host, int cmdidx)
> {
> dev_dbg(host->mci.hw_dev,
> @@ -285,7 +262,7 @@ static int rk_sdhci_send_cmd(struct mci_host *mci, struct mci_cmd *cmd,
> sdhci_write32(&host->sdhci, SDHCI_ARGUMENT, cmd->cmdarg);
> sdhci_write16(&host->sdhci, SDHCI_COMMAND, command);
>
> - ret = rk_sdhci_wait_for_done(host, SDHCI_INT_CMD_COMPLETE);
> + ret = sdhci_wait_for_done(&host->sdhci, SDHCI_INT_CMD_COMPLETE);
> if (ret == -EPERM)
> goto error;
> else if (ret)
> diff --git a/drivers/mci/sdhci.c b/drivers/mci/sdhci.c
> index 2cdd3c3c8f..635884e2a2 100644
> --- a/drivers/mci/sdhci.c
> +++ b/drivers/mci/sdhci.c
> @@ -124,6 +124,33 @@ void sdhci_set_bus_width(struct sdhci *host, int width)
>
> #endif
>
> +int sdhci_wait_for_done(struct sdhci *sdhci, u32 mask)
> +{
> + u64 start = get_time_ns();
> + u32 stat;
> +
> + do {
> + stat = sdhci_read32(sdhci, SDHCI_INT_STATUS);
> +
> + if (stat & SDHCI_INT_TIMEOUT)
> + return -ETIMEDOUT;
> +
> + if (stat & SDHCI_INT_ERROR) {
> + dev_err(sdhci->mci->hw_dev, "SDHCI_INT_ERROR: 0x%08x\n",
> + stat);
> + return -EPERM;
> + }
> +
> + if (is_timeout(start, 1000 * MSECOND)) {
> + dev_err(sdhci->mci->hw_dev,
> + "SDHCI timeout while waiting for done\n");
> + return -ETIMEDOUT;
> + }
> + } while ((stat & mask) != mask);
> +
> + return 0;
> +}
> +
> void sdhci_setup_data_pio(struct sdhci *sdhci, struct mci_data *data)
> {
> if (!data)
> diff --git a/drivers/mci/sdhci.h b/drivers/mci/sdhci.h
> index c538385939..fe8c25cb9c 100644
> --- a/drivers/mci/sdhci.h
> +++ b/drivers/mci/sdhci.h
> @@ -257,6 +257,7 @@ static inline void sdhci_write8(struct sdhci *host, int reg, u32 val)
> }
>
> #define SDHCI_NO_DMA DMA_ERROR_CODE
> +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,
> struct mci_data *data, bool dma, u32 *command,
More information about the barebox
mailing list