* [PATCH] mmc: sdhci-esdhc-imx: reset the tuning logic before execute tuning
@ 2022-10-28 9:04 haibo.chen
2022-10-28 10:17 ` Fabio Estevam
` (2 more replies)
0 siblings, 3 replies; 5+ messages in thread
From: haibo.chen @ 2022-10-28 9:04 UTC (permalink / raw)
To: adrian.hunter, ulf.hansson, linux-mmc
Cc: linux-imx, haibo.chen, sherry.sun, shawnguo, s.hauer, kernel,
festevam
From: Haibo Chen <haibo.chen@nxp.com>
For standard tuning method on usdhc, the previous tuning result can
impact current tuning result, let current tuning can't set the correct
delay cell. And from the logic, this is also reasonable for manual
tuning method. So reset the tuning logic before execute tuning.
To avoid compile issue, this patch also move the esdhc_reset_tuning()
upper.
Find this issue when support SDIO WiFi in band wakeup feature. After
system resume back, will do re-tuning, but then meet data CRC error.
Do not meet this issue on SD/eMMC, because we already call
esdhc_reset_tuning() when config the legency ios, and SD/eMMC need
to re-init when system resume back, but SDIO device don't do re-init
if it has MMC_PM_KEEP_POWER pm_flags.
Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
---
drivers/mmc/host/sdhci-esdhc-imx.c | 82 ++++++++++++++++--------------
1 file changed, 44 insertions(+), 38 deletions(-)
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index b073e79dcd99..4559599d897d 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -1012,6 +1012,44 @@ static void esdhc_pltfm_set_bus_width(struct sdhci_host *host, int width)
SDHCI_HOST_CONTROL);
}
+static void esdhc_reset_tuning(struct sdhci_host *host)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
+ u32 ctrl;
+ int ret;
+
+ /* Reset the tuning circuit */
+ if (esdhc_is_usdhc(imx_data)) {
+ if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING) {
+ ctrl = readl(host->ioaddr + ESDHC_MIX_CTRL);
+ ctrl &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
+ ctrl &= ~ESDHC_MIX_CTRL_FBCLK_SEL;
+ writel(ctrl, host->ioaddr + ESDHC_MIX_CTRL);
+ writel(0, host->ioaddr + ESDHC_TUNE_CTRL_STATUS);
+ } else if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING) {
+ ctrl = readl(host->ioaddr + SDHCI_AUTO_CMD_STATUS);
+ ctrl &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
+ ctrl &= ~ESDHC_MIX_CTRL_EXE_TUNE;
+ writel(ctrl, host->ioaddr + SDHCI_AUTO_CMD_STATUS);
+ /* Make sure ESDHC_MIX_CTRL_EXE_TUNE cleared */
+ ret = readl_poll_timeout(host->ioaddr + SDHCI_AUTO_CMD_STATUS,
+ ctrl, !(ctrl & ESDHC_MIX_CTRL_EXE_TUNE), 1, 50);
+ if (ret == -ETIMEDOUT)
+ dev_warn(mmc_dev(host->mmc),
+ "Warning! clear execute tuning bit failed\n");
+ /*
+ * SDHCI_INT_DATA_AVAIL is W1C bit, set this bit will clear the
+ * usdhc IP internal logic flag execute_tuning_with_clr_buf, which
+ * will finally make sure the normal data transfer logic correct.
+ */
+ ctrl = readl(host->ioaddr + SDHCI_INT_STATUS);
+ ctrl |= SDHCI_INT_DATA_AVAIL;
+ writel(ctrl, host->ioaddr + SDHCI_INT_STATUS);
+ }
+ }
+}
+
static int usdhc_execute_tuning(struct mmc_host *mmc, u32 opcode)
{
struct sdhci_host *host = mmc_priv(mmc);
@@ -1023,6 +1061,12 @@ static int usdhc_execute_tuning(struct mmc_host *mmc, u32 opcode)
if (host->timing == MMC_TIMING_UHS_DDR50)
return 0;
+ /*
+ * Reset tuning circuit logic. If not, the previous tuning result
+ * will impact current tuning, make current tuning can't set the
+ * correct delay cell.
+ */
+ esdhc_reset_tuning(host);
return sdhci_execute_tuning(mmc, opcode);
}
@@ -1196,44 +1240,6 @@ static void esdhc_set_strobe_dll(struct sdhci_host *host)
"warning! HS400 strobe DLL status REF/SLV not lock in 50us, STROBE DLL status is %x!\n", v);
}
-static void esdhc_reset_tuning(struct sdhci_host *host)
-{
- struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
- struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
- u32 ctrl;
- int ret;
-
- /* Reset the tuning circuit */
- if (esdhc_is_usdhc(imx_data)) {
- if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING) {
- ctrl = readl(host->ioaddr + ESDHC_MIX_CTRL);
- ctrl &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
- ctrl &= ~ESDHC_MIX_CTRL_FBCLK_SEL;
- writel(ctrl, host->ioaddr + ESDHC_MIX_CTRL);
- writel(0, host->ioaddr + ESDHC_TUNE_CTRL_STATUS);
- } else if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING) {
- ctrl = readl(host->ioaddr + SDHCI_AUTO_CMD_STATUS);
- ctrl &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
- ctrl &= ~ESDHC_MIX_CTRL_EXE_TUNE;
- writel(ctrl, host->ioaddr + SDHCI_AUTO_CMD_STATUS);
- /* Make sure ESDHC_MIX_CTRL_EXE_TUNE cleared */
- ret = readl_poll_timeout(host->ioaddr + SDHCI_AUTO_CMD_STATUS,
- ctrl, !(ctrl & ESDHC_MIX_CTRL_EXE_TUNE), 1, 50);
- if (ret == -ETIMEDOUT)
- dev_warn(mmc_dev(host->mmc),
- "Warning! clear execute tuning bit failed\n");
- /*
- * SDHCI_INT_DATA_AVAIL is W1C bit, set this bit will clear the
- * usdhc IP internal logic flag execute_tuning_with_clr_buf, which
- * will finally make sure the normal data transfer logic correct.
- */
- ctrl = readl(host->ioaddr + SDHCI_INT_STATUS);
- ctrl |= SDHCI_INT_DATA_AVAIL;
- writel(ctrl, host->ioaddr + SDHCI_INT_STATUS);
- }
- }
-}
-
static void esdhc_set_uhs_signaling(struct sdhci_host *host, unsigned timing)
{
u32 m;
--
2.34.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH] mmc: sdhci-esdhc-imx: reset the tuning logic before execute tuning
2022-10-28 9:04 [PATCH] mmc: sdhci-esdhc-imx: reset the tuning logic before execute tuning haibo.chen
@ 2022-10-28 10:17 ` Fabio Estevam
2022-10-28 11:05 ` Bough Chen
2022-11-02 10:16 ` Adrian Hunter
2022-11-07 20:13 ` Ulf Hansson
2 siblings, 1 reply; 5+ messages in thread
From: Fabio Estevam @ 2022-10-28 10:17 UTC (permalink / raw)
To: haibo.chen
Cc: adrian.hunter, ulf.hansson, linux-mmc, linux-imx, sherry.sun,
shawnguo, s.hauer, kernel
Hi Haibo,
On Fri, Oct 28, 2022 at 6:25 AM <haibo.chen@nxp.com> wrote:
>
> From: Haibo Chen <haibo.chen@nxp.com>
>
> For standard tuning method on usdhc, the previous tuning result can
> impact current tuning result, let current tuning can't set the correct
> delay cell. And from the logic, this is also reasonable for manual
> tuning method. So reset the tuning logic before execute tuning.
> To avoid compile issue, this patch also move the esdhc_reset_tuning()
> upper.
>
> Find this issue when support SDIO WiFi in band wakeup feature. After
> system resume back, will do re-tuning, but then meet data CRC error.
>
> Do not meet this issue on SD/eMMC, because we already call
> esdhc_reset_tuning() when config the legency ios, and SD/eMMC need
> to re-init when system resume back, but SDIO device don't do re-init
> if it has MMC_PM_KEEP_POWER pm_flags.
Fixes tag missing?
^ permalink raw reply [flat|nested] 5+ messages in thread
* RE: [PATCH] mmc: sdhci-esdhc-imx: reset the tuning logic before execute tuning
2022-10-28 10:17 ` Fabio Estevam
@ 2022-10-28 11:05 ` Bough Chen
0 siblings, 0 replies; 5+ messages in thread
From: Bough Chen @ 2022-10-28 11:05 UTC (permalink / raw)
To: Fabio Estevam
Cc: adrian.hunter@intel.com, ulf.hansson@linaro.org,
linux-mmc@vger.kernel.org, dl-linux-imx, Sherry Sun,
shawnguo@kernel.org, s.hauer@pengutronix.de,
kernel@pengutronix.de
> -----Original Message-----
> From: Fabio Estevam <festevam@gmail.com>
> Sent: 2022年10月28日 18:18
> To: Bough Chen <haibo.chen@nxp.com>
> Cc: adrian.hunter@intel.com; ulf.hansson@linaro.org;
> linux-mmc@vger.kernel.org; dl-linux-imx <linux-imx@nxp.com>; Sherry Sun
> <sherry.sun@nxp.com>; shawnguo@kernel.org; s.hauer@pengutronix.de;
> kernel@pengutronix.de
> Subject: Re: [PATCH] mmc: sdhci-esdhc-imx: reset the tuning logic before
> execute tuning
>
> Hi Haibo,
>
> On Fri, Oct 28, 2022 at 6:25 AM <haibo.chen@nxp.com> wrote:
> >
> > From: Haibo Chen <haibo.chen@nxp.com>
> >
> > For standard tuning method on usdhc, the previous tuning result can
> > impact current tuning result, let current tuning can't set the correct
> > delay cell. And from the logic, this is also reasonable for manual
> > tuning method. So reset the tuning logic before execute tuning.
> > To avoid compile issue, this patch also move the esdhc_reset_tuning()
> > upper.
> >
> > Find this issue when support SDIO WiFi in band wakeup feature. After
> > system resume back, will do re-tuning, but then meet data CRC error.
> >
> > Do not meet this issue on SD/eMMC, because we already call
> > esdhc_reset_tuning() when config the legency ios, and SD/eMMC need to
> > re-init when system resume back, but SDIO device don't do re-init if
> > it has MMC_PM_KEEP_POWER pm_flags.
>
> Fixes tag missing?
Hi Fabio,
This is a bug fix patch, but hard to find a fix tag.
In this patch, I just add the tuning reset in function usdhc_execute_tuning(), but for this usdhc_execute_tuning(),
it is involve in the commit de3e1dd09b72 ("mmc: sdhci: usdhc: do not do tuning for DDR50 mode.").
if fix tag point to this commit number, logically, seem incorrect. But if point to an older commit, like
d9370424c948 ("mmc: sdhci-esdhc-imx: reset tuning circuit when power on mmc card"), it's hard to port
current patch to the linux version between these two commit number, because no usdhc_execute_tuning() there.
So I just not add the fix tag here.
Best Regards
Haibo Chen
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] mmc: sdhci-esdhc-imx: reset the tuning logic before execute tuning
2022-10-28 9:04 [PATCH] mmc: sdhci-esdhc-imx: reset the tuning logic before execute tuning haibo.chen
2022-10-28 10:17 ` Fabio Estevam
@ 2022-11-02 10:16 ` Adrian Hunter
2022-11-07 20:13 ` Ulf Hansson
2 siblings, 0 replies; 5+ messages in thread
From: Adrian Hunter @ 2022-11-02 10:16 UTC (permalink / raw)
To: haibo.chen, ulf.hansson, linux-mmc
Cc: linux-imx, sherry.sun, shawnguo, s.hauer, kernel, festevam
On 28/10/22 12:04, haibo.chen@nxp.com wrote:
> From: Haibo Chen <haibo.chen@nxp.com>
>
> For standard tuning method on usdhc, the previous tuning result can
> impact current tuning result, let current tuning can't set the correct
> delay cell. And from the logic, this is also reasonable for manual
> tuning method. So reset the tuning logic before execute tuning.
> To avoid compile issue, this patch also move the esdhc_reset_tuning()
> upper.
>
> Find this issue when support SDIO WiFi in band wakeup feature. After
> system resume back, will do re-tuning, but then meet data CRC error.
>
> Do not meet this issue on SD/eMMC, because we already call
> esdhc_reset_tuning() when config the legency ios, and SD/eMMC need
> to re-init when system resume back, but SDIO device don't do re-init
> if it has MMC_PM_KEEP_POWER pm_flags.
>
> Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
> ---
> drivers/mmc/host/sdhci-esdhc-imx.c | 82 ++++++++++++++++--------------
> 1 file changed, 44 insertions(+), 38 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
> index b073e79dcd99..4559599d897d 100644
> --- a/drivers/mmc/host/sdhci-esdhc-imx.c
> +++ b/drivers/mmc/host/sdhci-esdhc-imx.c
> @@ -1012,6 +1012,44 @@ static void esdhc_pltfm_set_bus_width(struct sdhci_host *host, int width)
> SDHCI_HOST_CONTROL);
> }
>
> +static void esdhc_reset_tuning(struct sdhci_host *host)
> +{
> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> + struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
> + u32 ctrl;
> + int ret;
> +
> + /* Reset the tuning circuit */
> + if (esdhc_is_usdhc(imx_data)) {
> + if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING) {
> + ctrl = readl(host->ioaddr + ESDHC_MIX_CTRL);
> + ctrl &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
> + ctrl &= ~ESDHC_MIX_CTRL_FBCLK_SEL;
> + writel(ctrl, host->ioaddr + ESDHC_MIX_CTRL);
> + writel(0, host->ioaddr + ESDHC_TUNE_CTRL_STATUS);
> + } else if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING) {
> + ctrl = readl(host->ioaddr + SDHCI_AUTO_CMD_STATUS);
> + ctrl &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
> + ctrl &= ~ESDHC_MIX_CTRL_EXE_TUNE;
> + writel(ctrl, host->ioaddr + SDHCI_AUTO_CMD_STATUS);
> + /* Make sure ESDHC_MIX_CTRL_EXE_TUNE cleared */
> + ret = readl_poll_timeout(host->ioaddr + SDHCI_AUTO_CMD_STATUS,
> + ctrl, !(ctrl & ESDHC_MIX_CTRL_EXE_TUNE), 1, 50);
> + if (ret == -ETIMEDOUT)
> + dev_warn(mmc_dev(host->mmc),
> + "Warning! clear execute tuning bit failed\n");
> + /*
> + * SDHCI_INT_DATA_AVAIL is W1C bit, set this bit will clear the
> + * usdhc IP internal logic flag execute_tuning_with_clr_buf, which
> + * will finally make sure the normal data transfer logic correct.
> + */
> + ctrl = readl(host->ioaddr + SDHCI_INT_STATUS);
> + ctrl |= SDHCI_INT_DATA_AVAIL;
> + writel(ctrl, host->ioaddr + SDHCI_INT_STATUS);
> + }
> + }
> +}
> +
> static int usdhc_execute_tuning(struct mmc_host *mmc, u32 opcode)
> {
> struct sdhci_host *host = mmc_priv(mmc);
> @@ -1023,6 +1061,12 @@ static int usdhc_execute_tuning(struct mmc_host *mmc, u32 opcode)
> if (host->timing == MMC_TIMING_UHS_DDR50)
> return 0;
>
> + /*
> + * Reset tuning circuit logic. If not, the previous tuning result
> + * will impact current tuning, make current tuning can't set the
> + * correct delay cell.
> + */
> + esdhc_reset_tuning(host);
> return sdhci_execute_tuning(mmc, opcode);
> }
>
> @@ -1196,44 +1240,6 @@ static void esdhc_set_strobe_dll(struct sdhci_host *host)
> "warning! HS400 strobe DLL status REF/SLV not lock in 50us, STROBE DLL status is %x!\n", v);
> }
>
> -static void esdhc_reset_tuning(struct sdhci_host *host)
> -{
> - struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> - struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
> - u32 ctrl;
> - int ret;
> -
> - /* Reset the tuning circuit */
> - if (esdhc_is_usdhc(imx_data)) {
> - if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING) {
> - ctrl = readl(host->ioaddr + ESDHC_MIX_CTRL);
> - ctrl &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
> - ctrl &= ~ESDHC_MIX_CTRL_FBCLK_SEL;
> - writel(ctrl, host->ioaddr + ESDHC_MIX_CTRL);
> - writel(0, host->ioaddr + ESDHC_TUNE_CTRL_STATUS);
> - } else if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING) {
> - ctrl = readl(host->ioaddr + SDHCI_AUTO_CMD_STATUS);
> - ctrl &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
> - ctrl &= ~ESDHC_MIX_CTRL_EXE_TUNE;
> - writel(ctrl, host->ioaddr + SDHCI_AUTO_CMD_STATUS);
> - /* Make sure ESDHC_MIX_CTRL_EXE_TUNE cleared */
> - ret = readl_poll_timeout(host->ioaddr + SDHCI_AUTO_CMD_STATUS,
> - ctrl, !(ctrl & ESDHC_MIX_CTRL_EXE_TUNE), 1, 50);
> - if (ret == -ETIMEDOUT)
> - dev_warn(mmc_dev(host->mmc),
> - "Warning! clear execute tuning bit failed\n");
> - /*
> - * SDHCI_INT_DATA_AVAIL is W1C bit, set this bit will clear the
> - * usdhc IP internal logic flag execute_tuning_with_clr_buf, which
> - * will finally make sure the normal data transfer logic correct.
> - */
> - ctrl = readl(host->ioaddr + SDHCI_INT_STATUS);
> - ctrl |= SDHCI_INT_DATA_AVAIL;
> - writel(ctrl, host->ioaddr + SDHCI_INT_STATUS);
> - }
> - }
> -}
> -
> static void esdhc_set_uhs_signaling(struct sdhci_host *host, unsigned timing)
> {
> u32 m;
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] mmc: sdhci-esdhc-imx: reset the tuning logic before execute tuning
2022-10-28 9:04 [PATCH] mmc: sdhci-esdhc-imx: reset the tuning logic before execute tuning haibo.chen
2022-10-28 10:17 ` Fabio Estevam
2022-11-02 10:16 ` Adrian Hunter
@ 2022-11-07 20:13 ` Ulf Hansson
2 siblings, 0 replies; 5+ messages in thread
From: Ulf Hansson @ 2022-11-07 20:13 UTC (permalink / raw)
To: haibo.chen
Cc: adrian.hunter, linux-mmc, linux-imx, sherry.sun, shawnguo,
s.hauer, kernel, festevam
On Fri, 28 Oct 2022 at 11:25, <haibo.chen@nxp.com> wrote:
>
> From: Haibo Chen <haibo.chen@nxp.com>
>
> For standard tuning method on usdhc, the previous tuning result can
> impact current tuning result, let current tuning can't set the correct
> delay cell. And from the logic, this is also reasonable for manual
> tuning method. So reset the tuning logic before execute tuning.
> To avoid compile issue, this patch also move the esdhc_reset_tuning()
> upper.
>
> Find this issue when support SDIO WiFi in band wakeup feature. After
> system resume back, will do re-tuning, but then meet data CRC error.
>
> Do not meet this issue on SD/eMMC, because we already call
> esdhc_reset_tuning() when config the legency ios, and SD/eMMC need
> to re-init when system resume back, but SDIO device don't do re-init
> if it has MMC_PM_KEEP_POWER pm_flags.
>
> Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Applied for next, thanks!
Kind regards
Uffe
> ---
> drivers/mmc/host/sdhci-esdhc-imx.c | 82 ++++++++++++++++--------------
> 1 file changed, 44 insertions(+), 38 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
> index b073e79dcd99..4559599d897d 100644
> --- a/drivers/mmc/host/sdhci-esdhc-imx.c
> +++ b/drivers/mmc/host/sdhci-esdhc-imx.c
> @@ -1012,6 +1012,44 @@ static void esdhc_pltfm_set_bus_width(struct sdhci_host *host, int width)
> SDHCI_HOST_CONTROL);
> }
>
> +static void esdhc_reset_tuning(struct sdhci_host *host)
> +{
> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> + struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
> + u32 ctrl;
> + int ret;
> +
> + /* Reset the tuning circuit */
> + if (esdhc_is_usdhc(imx_data)) {
> + if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING) {
> + ctrl = readl(host->ioaddr + ESDHC_MIX_CTRL);
> + ctrl &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
> + ctrl &= ~ESDHC_MIX_CTRL_FBCLK_SEL;
> + writel(ctrl, host->ioaddr + ESDHC_MIX_CTRL);
> + writel(0, host->ioaddr + ESDHC_TUNE_CTRL_STATUS);
> + } else if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING) {
> + ctrl = readl(host->ioaddr + SDHCI_AUTO_CMD_STATUS);
> + ctrl &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
> + ctrl &= ~ESDHC_MIX_CTRL_EXE_TUNE;
> + writel(ctrl, host->ioaddr + SDHCI_AUTO_CMD_STATUS);
> + /* Make sure ESDHC_MIX_CTRL_EXE_TUNE cleared */
> + ret = readl_poll_timeout(host->ioaddr + SDHCI_AUTO_CMD_STATUS,
> + ctrl, !(ctrl & ESDHC_MIX_CTRL_EXE_TUNE), 1, 50);
> + if (ret == -ETIMEDOUT)
> + dev_warn(mmc_dev(host->mmc),
> + "Warning! clear execute tuning bit failed\n");
> + /*
> + * SDHCI_INT_DATA_AVAIL is W1C bit, set this bit will clear the
> + * usdhc IP internal logic flag execute_tuning_with_clr_buf, which
> + * will finally make sure the normal data transfer logic correct.
> + */
> + ctrl = readl(host->ioaddr + SDHCI_INT_STATUS);
> + ctrl |= SDHCI_INT_DATA_AVAIL;
> + writel(ctrl, host->ioaddr + SDHCI_INT_STATUS);
> + }
> + }
> +}
> +
> static int usdhc_execute_tuning(struct mmc_host *mmc, u32 opcode)
> {
> struct sdhci_host *host = mmc_priv(mmc);
> @@ -1023,6 +1061,12 @@ static int usdhc_execute_tuning(struct mmc_host *mmc, u32 opcode)
> if (host->timing == MMC_TIMING_UHS_DDR50)
> return 0;
>
> + /*
> + * Reset tuning circuit logic. If not, the previous tuning result
> + * will impact current tuning, make current tuning can't set the
> + * correct delay cell.
> + */
> + esdhc_reset_tuning(host);
> return sdhci_execute_tuning(mmc, opcode);
> }
>
> @@ -1196,44 +1240,6 @@ static void esdhc_set_strobe_dll(struct sdhci_host *host)
> "warning! HS400 strobe DLL status REF/SLV not lock in 50us, STROBE DLL status is %x!\n", v);
> }
>
> -static void esdhc_reset_tuning(struct sdhci_host *host)
> -{
> - struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> - struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
> - u32 ctrl;
> - int ret;
> -
> - /* Reset the tuning circuit */
> - if (esdhc_is_usdhc(imx_data)) {
> - if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING) {
> - ctrl = readl(host->ioaddr + ESDHC_MIX_CTRL);
> - ctrl &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
> - ctrl &= ~ESDHC_MIX_CTRL_FBCLK_SEL;
> - writel(ctrl, host->ioaddr + ESDHC_MIX_CTRL);
> - writel(0, host->ioaddr + ESDHC_TUNE_CTRL_STATUS);
> - } else if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING) {
> - ctrl = readl(host->ioaddr + SDHCI_AUTO_CMD_STATUS);
> - ctrl &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
> - ctrl &= ~ESDHC_MIX_CTRL_EXE_TUNE;
> - writel(ctrl, host->ioaddr + SDHCI_AUTO_CMD_STATUS);
> - /* Make sure ESDHC_MIX_CTRL_EXE_TUNE cleared */
> - ret = readl_poll_timeout(host->ioaddr + SDHCI_AUTO_CMD_STATUS,
> - ctrl, !(ctrl & ESDHC_MIX_CTRL_EXE_TUNE), 1, 50);
> - if (ret == -ETIMEDOUT)
> - dev_warn(mmc_dev(host->mmc),
> - "Warning! clear execute tuning bit failed\n");
> - /*
> - * SDHCI_INT_DATA_AVAIL is W1C bit, set this bit will clear the
> - * usdhc IP internal logic flag execute_tuning_with_clr_buf, which
> - * will finally make sure the normal data transfer logic correct.
> - */
> - ctrl = readl(host->ioaddr + SDHCI_INT_STATUS);
> - ctrl |= SDHCI_INT_DATA_AVAIL;
> - writel(ctrl, host->ioaddr + SDHCI_INT_STATUS);
> - }
> - }
> -}
> -
> static void esdhc_set_uhs_signaling(struct sdhci_host *host, unsigned timing)
> {
> u32 m;
> --
> 2.34.1
>
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2022-11-07 20:14 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2022-10-28 9:04 [PATCH] mmc: sdhci-esdhc-imx: reset the tuning logic before execute tuning haibo.chen
2022-10-28 10:17 ` Fabio Estevam
2022-10-28 11:05 ` Bough Chen
2022-11-02 10:16 ` Adrian Hunter
2022-11-07 20:13 ` Ulf Hansson
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