From: Victor Shih <[email protected]>
This is a sdhci version of mmc's uhs2_set_reg operation.
UHS-II interface (related registers) will be initialised here.
Signed-off-by: Ben Chuang <[email protected]>
Signed-off-by: AKASHI Takahiro <[email protected]>
Signed-off-by: Victor Shih <[email protected]>
Acked-by: Adrian Hunter <[email protected]>
---
Updates in V8:
- Reorder the definitions and lose the parentheses in
sdhci_uhs2_set_config().
- read_poll_timeout() to instead of read_poll_timeout_atomic()
in sdhci_uhs2_check_dormant().
Updates in V7:
- Remove unnecessary function.
Updates in V6:
- Remove unnecessary function.
- Remove unnecessary parameter when call the DBG().
- Cancel export state of some functions.
---
drivers/mmc/host/sdhci-uhs2.c | 88 +++++++++++++++++++++++++++++++++++
1 file changed, 88 insertions(+)
diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c
index af1b0c5e48fd..09b86fec9f7b 100644
--- a/drivers/mmc/host/sdhci-uhs2.c
+++ b/drivers/mmc/host/sdhci-uhs2.c
@@ -278,6 +278,48 @@ static void __sdhci_uhs2_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
sdhci_set_clock(host, host->clock);
}
+static void sdhci_uhs2_set_config(struct sdhci_host *host)
+{
+ u32 value;
+ u16 sdhci_uhs2_set_ptr = sdhci_readw(host, SDHCI_UHS2_SETTINGS_PTR);
+ u16 sdhci_uhs2_gen_set_reg = sdhci_uhs2_set_ptr;
+ u16 sdhci_uhs2_phy_set_reg = sdhci_uhs2_set_ptr + 4;
+ u16 sdhci_uhs2_tran_set_reg = sdhci_uhs2_set_ptr + 8;
+ u16 sdhci_uhs2_tran_set_1_reg = sdhci_uhs2_set_ptr + 12;
+
+ /* Set Gen Settings */
+ value = FIELD_PREP(SDHCI_UHS2_GEN_SETTINGS_N_LANES_MASK, host->mmc->uhs2_caps.n_lanes_set);
+ sdhci_writel(host, value, sdhci_uhs2_gen_set_reg);
+
+ /* Set PHY Settings */
+ value = FIELD_PREP(SDHCI_UHS2_PHY_N_LSS_DIR_MASK, host->mmc->uhs2_caps.n_lss_dir_set) |
+ FIELD_PREP(SDHCI_UHS2_PHY_N_LSS_SYN_MASK, host->mmc->uhs2_caps.n_lss_sync_set);
+ if (host->mmc->ios.timing == MMC_TIMING_UHS2_SPEED_B ||
+ host->mmc->ios.timing == MMC_TIMING_UHS2_SPEED_B_HD)
+ value |= SDHCI_UHS2_PHY_SET_SPEED_B;
+ sdhci_writel(host, value, sdhci_uhs2_phy_set_reg);
+
+ /* Set LINK-TRAN Settings */
+ value = FIELD_PREP(SDHCI_UHS2_TRAN_RETRY_CNT_MASK, host->mmc->uhs2_caps.max_retry_set) |
+ FIELD_PREP(SDHCI_UHS2_TRAN_N_FCU_MASK, host->mmc->uhs2_caps.n_fcu_set);
+ sdhci_writel(host, value, sdhci_uhs2_tran_set_reg);
+ sdhci_writel(host, host->mmc->uhs2_caps.n_data_gap_set, sdhci_uhs2_tran_set_1_reg);
+}
+
+static int sdhci_uhs2_check_dormant(struct sdhci_host *host)
+{
+ int timeout = 100000; /* 100ms */
+ u32 val;
+
+ if (read_poll_timeout(sdhci_readl, val, (val & SDHCI_UHS2_IN_DORMANT_STATE),
+ 100, timeout, true, host, SDHCI_PRESENT_STATE)) {
+ pr_warn("%s: UHS2 IN_DORMANT fail in 100ms.\n", mmc_hostname(host->mmc));
+ sdhci_dumpregs(host);
+ return -EIO;
+ }
+ return 0;
+}
+
/*****************************************************************************\
* *
* MMC callbacks *
@@ -359,6 +401,51 @@ static int sdhci_uhs2_enable_clk(struct mmc_host *mmc)
return 0;
}
+static int sdhci_uhs2_do_detect_init(struct mmc_host *mmc);
+
+static int sdhci_uhs2_control(struct mmc_host *mmc, enum sd_uhs2_operation op)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+ struct mmc_ios *ios = &mmc->ios;
+ int err = 0;
+
+ DBG("Begin uhs2 control, act %d.\n", op);
+
+ switch (op) {
+ case UHS2_PHY_INIT:
+ err = sdhci_uhs2_do_detect_init(mmc);
+ break;
+ case UHS2_SET_CONFIG:
+ sdhci_uhs2_set_config(host);
+ break;
+ case UHS2_ENABLE_INT:
+ sdhci_uhs2_clear_set_irqs(host, 0, SDHCI_INT_CARD_INT);
+ break;
+ case UHS2_DISABLE_INT:
+ sdhci_uhs2_clear_set_irqs(host, SDHCI_INT_CARD_INT, 0);
+ break;
+ case UHS2_CHECK_DORMANT:
+ err = sdhci_uhs2_check_dormant(host);
+ break;
+ case UHS2_DISABLE_CLK:
+ err = sdhci_uhs2_disable_clk(mmc);
+ break;
+ case UHS2_ENABLE_CLK:
+ err = sdhci_uhs2_enable_clk(mmc);
+ break;
+ case UHS2_SET_IOS:
+ err = sdhci_uhs2_set_ios(mmc, ios);
+ break;
+ default:
+ pr_err("%s: input sd uhs2 operation %d is wrong!\n",
+ mmc_hostname(host->mmc), op);
+ err = -EIO;
+ break;
+ }
+
+ return err;
+}
+
/*****************************************************************************\
* *
* Driver init/exit *
@@ -481,6 +568,7 @@ static int sdhci_uhs2_host_ops_init(struct sdhci_host *host)
{
host->mmc_host_ops.start_signal_voltage_switch =
sdhci_uhs2_start_signal_voltage_switch;
+ host->mmc_host_ops.uhs2_control = sdhci_uhs2_control;
return 0;
}
--
2.25.1
On Fri, 15 Sept 2023 at 11:44, Victor Shih <[email protected]> wrote:
>
> From: Victor Shih <[email protected]>
>
> This is a sdhci version of mmc's uhs2_set_reg operation.
> UHS-II interface (related registers) will be initialised here.
Please clarify this. It's not entirely easy to understand what goes on
by reading the commit message above.
Again, the similar comments as I provided for patch15 applies to
$subject patch too.
>
> Signed-off-by: Ben Chuang <[email protected]>
> Signed-off-by: AKASHI Takahiro <[email protected]>
> Signed-off-by: Victor Shih <[email protected]>
> Acked-by: Adrian Hunter <[email protected]>
> ---
>
> Updates in V8:
> - Reorder the definitions and lose the parentheses in
> sdhci_uhs2_set_config().
> - read_poll_timeout() to instead of read_poll_timeout_atomic()
> in sdhci_uhs2_check_dormant().
>
> Updates in V7:
> - Remove unnecessary function.
>
> Updates in V6:
> - Remove unnecessary function.
> - Remove unnecessary parameter when call the DBG().
> - Cancel export state of some functions.
>
> ---
>
> drivers/mmc/host/sdhci-uhs2.c | 88 +++++++++++++++++++++++++++++++++++
> 1 file changed, 88 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c
> index af1b0c5e48fd..09b86fec9f7b 100644
> --- a/drivers/mmc/host/sdhci-uhs2.c
> +++ b/drivers/mmc/host/sdhci-uhs2.c
> @@ -278,6 +278,48 @@ static void __sdhci_uhs2_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
> sdhci_set_clock(host, host->clock);
> }
>
> +static void sdhci_uhs2_set_config(struct sdhci_host *host)
> +{
> + u32 value;
> + u16 sdhci_uhs2_set_ptr = sdhci_readw(host, SDHCI_UHS2_SETTINGS_PTR);
> + u16 sdhci_uhs2_gen_set_reg = sdhci_uhs2_set_ptr;
> + u16 sdhci_uhs2_phy_set_reg = sdhci_uhs2_set_ptr + 4;
> + u16 sdhci_uhs2_tran_set_reg = sdhci_uhs2_set_ptr + 8;
> + u16 sdhci_uhs2_tran_set_1_reg = sdhci_uhs2_set_ptr + 12;
> +
> + /* Set Gen Settings */
> + value = FIELD_PREP(SDHCI_UHS2_GEN_SETTINGS_N_LANES_MASK, host->mmc->uhs2_caps.n_lanes_set);
> + sdhci_writel(host, value, sdhci_uhs2_gen_set_reg);
> +
> + /* Set PHY Settings */
> + value = FIELD_PREP(SDHCI_UHS2_PHY_N_LSS_DIR_MASK, host->mmc->uhs2_caps.n_lss_dir_set) |
> + FIELD_PREP(SDHCI_UHS2_PHY_N_LSS_SYN_MASK, host->mmc->uhs2_caps.n_lss_sync_set);
> + if (host->mmc->ios.timing == MMC_TIMING_UHS2_SPEED_B ||
> + host->mmc->ios.timing == MMC_TIMING_UHS2_SPEED_B_HD)
> + value |= SDHCI_UHS2_PHY_SET_SPEED_B;
> + sdhci_writel(host, value, sdhci_uhs2_phy_set_reg);
> +
> + /* Set LINK-TRAN Settings */
> + value = FIELD_PREP(SDHCI_UHS2_TRAN_RETRY_CNT_MASK, host->mmc->uhs2_caps.max_retry_set) |
> + FIELD_PREP(SDHCI_UHS2_TRAN_N_FCU_MASK, host->mmc->uhs2_caps.n_fcu_set);
> + sdhci_writel(host, value, sdhci_uhs2_tran_set_reg);
> + sdhci_writel(host, host->mmc->uhs2_caps.n_data_gap_set, sdhci_uhs2_tran_set_1_reg);
> +}
> +
> +static int sdhci_uhs2_check_dormant(struct sdhci_host *host)
> +{
> + int timeout = 100000; /* 100ms */
Define.
> + u32 val;
> +
> + if (read_poll_timeout(sdhci_readl, val, (val & SDHCI_UHS2_IN_DORMANT_STATE),
> + 100, timeout, true, host, SDHCI_PRESENT_STATE)) {
> + pr_warn("%s: UHS2 IN_DORMANT fail in 100ms.\n", mmc_hostname(host->mmc));
> + sdhci_dumpregs(host);
> + return -EIO;
> + }
> + return 0;
> +}
> +
> /*****************************************************************************\
> * *
> * MMC callbacks *
> @@ -359,6 +401,51 @@ static int sdhci_uhs2_enable_clk(struct mmc_host *mmc)
> return 0;
> }
>
> +static int sdhci_uhs2_do_detect_init(struct mmc_host *mmc);
Please re-order the code so this declaration isn't needed. And make it
part of the patch that introduced the function, not in the $subject
patch.
> +
> +static int sdhci_uhs2_control(struct mmc_host *mmc, enum sd_uhs2_operation op)
> +{
> + struct sdhci_host *host = mmc_priv(mmc);
> + struct mmc_ios *ios = &mmc->ios;
> + int err = 0;
> +
> + DBG("Begin uhs2 control, act %d.\n", op);
> +
> + switch (op) {
> + case UHS2_PHY_INIT:
> + err = sdhci_uhs2_do_detect_init(mmc);
> + break;
> + case UHS2_SET_CONFIG:
> + sdhci_uhs2_set_config(host);
> + break;
> + case UHS2_ENABLE_INT:
> + sdhci_uhs2_clear_set_irqs(host, 0, SDHCI_INT_CARD_INT);
> + break;
> + case UHS2_DISABLE_INT:
> + sdhci_uhs2_clear_set_irqs(host, SDHCI_INT_CARD_INT, 0);
> + break;
> + case UHS2_CHECK_DORMANT:
> + err = sdhci_uhs2_check_dormant(host);
> + break;
> + case UHS2_DISABLE_CLK:
> + err = sdhci_uhs2_disable_clk(mmc);
> + break;
> + case UHS2_ENABLE_CLK:
> + err = sdhci_uhs2_enable_clk(mmc);
> + break;
> + case UHS2_SET_IOS:
> + err = sdhci_uhs2_set_ios(mmc, ios);
> + break;
> + default:
> + pr_err("%s: input sd uhs2 operation %d is wrong!\n",
> + mmc_hostname(host->mmc), op);
> + err = -EIO;
> + break;
> + }
> +
> + return err;
> +}
> +
> /*****************************************************************************\
> * *
> * Driver init/exit *
> @@ -481,6 +568,7 @@ static int sdhci_uhs2_host_ops_init(struct sdhci_host *host)
> {
> host->mmc_host_ops.start_signal_voltage_switch =
> sdhci_uhs2_start_signal_voltage_switch;
> + host->mmc_host_ops.uhs2_control = sdhci_uhs2_control;
>
> return 0;
> }
Kind regards
Uffe
On Tue, Oct 3, 2023 at 7:20 PM Ulf Hansson <[email protected]> wrote:
>
> On Fri, 15 Sept 2023 at 11:44, Victor Shih <[email protected]> wrote:
> >
> > From: Victor Shih <[email protected]>
> >
> > This is a sdhci version of mmc's uhs2_set_reg operation.
> > UHS-II interface (related registers) will be initialised here.
>
> Please clarify this. It's not entirely easy to understand what goes on
> by reading the commit message above.
>
> Again, the similar comments as I provided for patch15 applies to
> $subject patch too.
>
Hi, Ulf
I will merge patch#15, patch#16 and patch#17 into one patch(patch#15)
for version 13.
Thanks, Victor Shih
> >
> > Signed-off-by: Ben Chuang <[email protected]>
> > Signed-off-by: AKASHI Takahiro <[email protected]>
> > Signed-off-by: Victor Shih <[email protected]>
> > Acked-by: Adrian Hunter <[email protected]>
> > ---
> >
> > Updates in V8:
> > - Reorder the definitions and lose the parentheses in
> > sdhci_uhs2_set_config().
> > - read_poll_timeout() to instead of read_poll_timeout_atomic()
> > in sdhci_uhs2_check_dormant().
> >
> > Updates in V7:
> > - Remove unnecessary function.
> >
> > Updates in V6:
> > - Remove unnecessary function.
> > - Remove unnecessary parameter when call the DBG().
> > - Cancel export state of some functions.
> >
> > ---
> >
> > drivers/mmc/host/sdhci-uhs2.c | 88 +++++++++++++++++++++++++++++++++++
> > 1 file changed, 88 insertions(+)
> >
> > diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c
> > index af1b0c5e48fd..09b86fec9f7b 100644
> > --- a/drivers/mmc/host/sdhci-uhs2.c
> > +++ b/drivers/mmc/host/sdhci-uhs2.c
> > @@ -278,6 +278,48 @@ static void __sdhci_uhs2_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
> > sdhci_set_clock(host, host->clock);
> > }
> >
> > +static void sdhci_uhs2_set_config(struct sdhci_host *host)
> > +{
> > + u32 value;
> > + u16 sdhci_uhs2_set_ptr = sdhci_readw(host, SDHCI_UHS2_SETTINGS_PTR);
> > + u16 sdhci_uhs2_gen_set_reg = sdhci_uhs2_set_ptr;
> > + u16 sdhci_uhs2_phy_set_reg = sdhci_uhs2_set_ptr + 4;
> > + u16 sdhci_uhs2_tran_set_reg = sdhci_uhs2_set_ptr + 8;
> > + u16 sdhci_uhs2_tran_set_1_reg = sdhci_uhs2_set_ptr + 12;
> > +
> > + /* Set Gen Settings */
> > + value = FIELD_PREP(SDHCI_UHS2_GEN_SETTINGS_N_LANES_MASK, host->mmc->uhs2_caps.n_lanes_set);
> > + sdhci_writel(host, value, sdhci_uhs2_gen_set_reg);
> > +
> > + /* Set PHY Settings */
> > + value = FIELD_PREP(SDHCI_UHS2_PHY_N_LSS_DIR_MASK, host->mmc->uhs2_caps.n_lss_dir_set) |
> > + FIELD_PREP(SDHCI_UHS2_PHY_N_LSS_SYN_MASK, host->mmc->uhs2_caps.n_lss_sync_set);
> > + if (host->mmc->ios.timing == MMC_TIMING_UHS2_SPEED_B ||
> > + host->mmc->ios.timing == MMC_TIMING_UHS2_SPEED_B_HD)
> > + value |= SDHCI_UHS2_PHY_SET_SPEED_B;
> > + sdhci_writel(host, value, sdhci_uhs2_phy_set_reg);
> > +
> > + /* Set LINK-TRAN Settings */
> > + value = FIELD_PREP(SDHCI_UHS2_TRAN_RETRY_CNT_MASK, host->mmc->uhs2_caps.max_retry_set) |
> > + FIELD_PREP(SDHCI_UHS2_TRAN_N_FCU_MASK, host->mmc->uhs2_caps.n_fcu_set);
> > + sdhci_writel(host, value, sdhci_uhs2_tran_set_reg);
> > + sdhci_writel(host, host->mmc->uhs2_caps.n_data_gap_set, sdhci_uhs2_tran_set_1_reg);
> > +}
> > +
> > +static int sdhci_uhs2_check_dormant(struct sdhci_host *host)
> > +{
> > + int timeout = 100000; /* 100ms */
>
> Define.
>
Hi, Ulf
I will update this in version 13.
Thanks, Victor Shih
> > + u32 val;
> > +
> > + if (read_poll_timeout(sdhci_readl, val, (val & SDHCI_UHS2_IN_DORMANT_STATE),
> > + 100, timeout, true, host, SDHCI_PRESENT_STATE)) {
> > + pr_warn("%s: UHS2 IN_DORMANT fail in 100ms.\n", mmc_hostname(host->mmc));
> > + sdhci_dumpregs(host);
> > + return -EIO;
> > + }
> > + return 0;
> > +}
> > +
> > /*****************************************************************************\
> > * *
> > * MMC callbacks *
> > @@ -359,6 +401,51 @@ static int sdhci_uhs2_enable_clk(struct mmc_host *mmc)
> > return 0;
> > }
> >
> > +static int sdhci_uhs2_do_detect_init(struct mmc_host *mmc);
>
> Please re-order the code so this declaration isn't needed. And make it
> part of the patch that introduced the function, not in the $subject
> patch.
>
Hi, Ulf
I will update this in version 13.
Thanks, Victor Shih
> > +
> > +static int sdhci_uhs2_control(struct mmc_host *mmc, enum sd_uhs2_operation op)
> > +{
> > + struct sdhci_host *host = mmc_priv(mmc);
> > + struct mmc_ios *ios = &mmc->ios;
> > + int err = 0;
> > +
> > + DBG("Begin uhs2 control, act %d.\n", op);
> > +
> > + switch (op) {
> > + case UHS2_PHY_INIT:
> > + err = sdhci_uhs2_do_detect_init(mmc);
> > + break;
> > + case UHS2_SET_CONFIG:
> > + sdhci_uhs2_set_config(host);
> > + break;
> > + case UHS2_ENABLE_INT:
> > + sdhci_uhs2_clear_set_irqs(host, 0, SDHCI_INT_CARD_INT);
> > + break;
> > + case UHS2_DISABLE_INT:
> > + sdhci_uhs2_clear_set_irqs(host, SDHCI_INT_CARD_INT, 0);
> > + break;
> > + case UHS2_CHECK_DORMANT:
> > + err = sdhci_uhs2_check_dormant(host);
> > + break;
> > + case UHS2_DISABLE_CLK:
> > + err = sdhci_uhs2_disable_clk(mmc);
> > + break;
> > + case UHS2_ENABLE_CLK:
> > + err = sdhci_uhs2_enable_clk(mmc);
> > + break;
> > + case UHS2_SET_IOS:
> > + err = sdhci_uhs2_set_ios(mmc, ios);
> > + break;
> > + default:
> > + pr_err("%s: input sd uhs2 operation %d is wrong!\n",
> > + mmc_hostname(host->mmc), op);
> > + err = -EIO;
> > + break;
> > + }
> > +
> > + return err;
> > +}
> > +
> > /*****************************************************************************\
> > * *
> > * Driver init/exit *
> > @@ -481,6 +568,7 @@ static int sdhci_uhs2_host_ops_init(struct sdhci_host *host)
> > {
> > host->mmc_host_ops.start_signal_voltage_switch =
> > sdhci_uhs2_start_signal_voltage_switch;
> > + host->mmc_host_ops.uhs2_control = sdhci_uhs2_control;
> >
> > return 0;
> > }
>
> Kind regards
> Uffe