| Message ID | 20240626132341.342963-4-prabhakar.mahadev-lad.rj@bp.renesas.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | Add SD/MMC support for Renesas RZ/V2H(P) SoC | expand |
Hi Wolfram and Prabhakar, > -----Original Message----- > From: Prabhakar <prabhakar.csengg@gmail.com> > Sent: Wednesday, June 26, 2024 2:24 PM > Subject: [PATCH v4 3/3] mmc: renesas_sdhi: Add support for RZ/V2H(P) SoC > > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> > > The SDHI/eMMC IPs found in the RZ/V2H(P) (a.k.a. r9a09g057) are very similar to those found in R- > Car Gen3. However, they are not identical, necessitating an SoC-specific compatible string for > fine-tuning driver support. > > Key features of the RZ/V2H(P) SDHI/eMMC IPs include: > - Voltage level control via the IOVS bit. > - PWEN pin support via SD_STATUS register. > - Lack of HS400 support. > - Fixed address mode operation. > > internal regulator support is added to control the voltage levels of SD pins via sd_iovs/sd_pwen > bits in SD_STATUS register. > > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> > Tested-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com> # on RZ/G3S > --- > v3->v4 > - Dropped using 'renesas,sdhi-use-internal-regulator' property > - Now using of_device_is_available() to check if regulator is available and enabled > - Dropped extra spaces during operations > - Included tested by tag from Claudiu > - Rebased patch on top of https://patchwork.kernel.org/project/linux-renesas- > soc/patch/20240626085015.32171-2-wsa+renesas@sang-engineering.com/ > > v2->v3 > - Moved regulator info to renesas_sdhi_of_data instead of quirks > - Added support to configure the init state of regulator > - Added function pointers to configure regulator > - Added REGULATOR_CHANGE_VOLTAGE mask > > v1->v2 > - Now controlling PWEN bit get/set_voltage > --- > drivers/mmc/host/renesas_sdhi.h | 13 ++ > drivers/mmc/host/renesas_sdhi_core.c | 98 ++++++++++++ > drivers/mmc/host/renesas_sdhi_internal_dmac.c | 147 ++++++++++++++++++ > drivers/mmc/host/tmio_mmc.h | 5 + > 4 files changed, 263 insertions(+) > > diff --git a/drivers/mmc/host/renesas_sdhi.h b/drivers/mmc/host/renesas_sdhi.h index > f12a87442338..cd509e7142ba 100644 > --- a/drivers/mmc/host/renesas_sdhi.h > +++ b/drivers/mmc/host/renesas_sdhi.h > @@ -11,6 +11,8 @@ > > #include <linux/dmaengine.h> > #include <linux/platform_device.h> > +#include <linux/regulator/driver.h> > +#include <linux/regulator/machine.h> > #include <linux/workqueue.h> > #include "tmio_mmc.h" > > @@ -36,6 +38,12 @@ struct renesas_sdhi_of_data { > unsigned int max_blk_count; > unsigned short max_segs; > unsigned long sdhi_flags; > + struct regulator_desc *rdesc; > + struct regulator_init_data *reg_init_data; > + bool regulator_init_state; > + unsigned int regulator_init_voltage; > + int (*regulator_force_endis)(struct regulator_dev *rdev, bool enable); > + int (*regulator_force_voltage)(struct regulator_dev *rdev, unsigned > +int voltage); > }; > > #define SDHI_CALIB_TABLE_MAX 32 > @@ -95,6 +103,11 @@ struct renesas_sdhi { > > struct reset_control *rstc; > struct tmio_mmc_host *host; > + > + bool use_internal_regulator; > + struct regulator_dev *internal_regulator; > + int (*regulator_force_endis)(struct regulator_dev *rdev, bool enable); > + int (*regulator_force_voltage)(struct regulator_dev *rdev, unsigned > +int voltage); > }; > > #define host_to_priv(host) \ > diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c > index 0fc159b52fa9..6f8e745477b5 100644 > --- a/drivers/mmc/host/renesas_sdhi_core.c > +++ b/drivers/mmc/host/renesas_sdhi_core.c > @@ -581,12 +581,50 @@ static void renesas_sdhi_reset(struct tmio_mmc_host *host, bool preserve) > > if (!preserve) { > if (priv->rstc) { > + bool regulator_enabled; > + > + /* to restore back the internal regulator after reset make a copy of it */ > + if (priv->use_internal_regulator) > + regulator_enabled = regulator_is_enabled(host->mmc->supply.vqmmc); On all other SoCs, SD power enable is GPIO and we define this as GPIO hog, so that It always supply Vmmc(3.3V) to the card for Card detection. In this case, the SoC dedicated pin(PWEN) provides VMMC(3.3V). By reset this value is always 1 (3.3V). So should we implement handling of PWEN bit as part of vqmmc regulator as it serves different functionality? If I understand correctly, VMMC(Always on 3.3V) for card detection -->PWEN pin Vqmmc(1.8v-3.3V) for UHS operation for voltage switch-->IOVS pin So according to me to implementing both the stuff in single regulator is not correct? Like GPIO hog, PWEN bit should always on, so that it always supply VMMC. What is your thoughts on this? Please correct me if I am wrong. Cheers, Biju
> If I understand correctly, > VMMC(Always on 3.3V) for card detection -->PWEN pin > Vqmmc(1.8v-3.3V) for UHS operation for voltage switch-->IOVS pin If these assumptions are correct, then I am sorry to have missed it. I thougaht PWEN is for vqmmc. If it is not, then we need two regulators, one for vmmc and one for vqmmc. This is what the TMIO core expects and already handles correctly on its own, or? Except for the reset handling where we need to preserve some value in the SDHI core.
Hi Prabhakar, On Wed, Jun 26, 2024 at 02:23:41PM +0100, Prabhakar wrote: > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> > > The SDHI/eMMC IPs found in the RZ/V2H(P) (a.k.a. r9a09g057) are very > similar to those found in R-Car Gen3. However, they are not identical, > necessitating an SoC-specific compatible string for fine-tuning driver > support. > > Key features of the RZ/V2H(P) SDHI/eMMC IPs include: > - Voltage level control via the IOVS bit. > - PWEN pin support via SD_STATUS register. > - Lack of HS400 support. > - Fixed address mode operation. > > internal regulator support is added to control the voltage levels of SD > pins via sd_iovs/sd_pwen bits in SD_STATUS register. > > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> > Tested-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com> # on RZ/G3S > --- > v3->v4 > - Dropped using 'renesas,sdhi-use-internal-regulator' property > - Now using of_device_is_available() to check if regulator is available and enabled > - Dropped extra spaces during operations > - Included tested by tag from Claudiu > - Rebased patch on top of https://patchwork.kernel.org/project/linux-renesas-soc/patch/20240626085015.32171-2-wsa+renesas@sang-engineering.com/ > > v2->v3 > - Moved regulator info to renesas_sdhi_of_data instead of quirks > - Added support to configure the init state of regulator > - Added function pointers to configure regulator > - Added REGULATOR_CHANGE_VOLTAGE mask > > v1->v2 > - Now controlling PWEN bit get/set_voltage > --- > drivers/mmc/host/renesas_sdhi.h | 13 ++ > drivers/mmc/host/renesas_sdhi_core.c | 98 ++++++++++++ > drivers/mmc/host/renesas_sdhi_internal_dmac.c | 147 ++++++++++++++++++ > drivers/mmc/host/tmio_mmc.h | 5 + > 4 files changed, 263 insertions(+) > > diff --git a/drivers/mmc/host/renesas_sdhi.h b/drivers/mmc/host/renesas_sdhi.h > index f12a87442338..cd509e7142ba 100644 > --- a/drivers/mmc/host/renesas_sdhi.h > +++ b/drivers/mmc/host/renesas_sdhi.h > @@ -11,6 +11,8 @@ > > #include <linux/dmaengine.h> > #include <linux/platform_device.h> > +#include <linux/regulator/driver.h> > +#include <linux/regulator/machine.h> > #include <linux/workqueue.h> > #include "tmio_mmc.h" > > @@ -36,6 +38,12 @@ struct renesas_sdhi_of_data { > unsigned int max_blk_count; > unsigned short max_segs; > unsigned long sdhi_flags; > + struct regulator_desc *rdesc; > + struct regulator_init_data *reg_init_data; > + bool regulator_init_state; > + unsigned int regulator_init_voltage; > + int (*regulator_force_endis)(struct regulator_dev *rdev, bool enable); > + int (*regulator_force_voltage)(struct regulator_dev *rdev, unsigned int voltage); I am open for discussing this but maybe here only + struct renesas_sdhi_regulator *internal_regulator or something and create the new struct with the additions above? > + int (*regulator_force_endis)(struct regulator_dev *rdev, bool enable); > + int (*regulator_force_voltage)(struct regulator_dev *rdev, unsigned int voltage); Do we need these functions because the regulator framework cannot force these actions because it caches the old state? I wonder if we can avoid these functions... And the questions from the other threads need further discussions as well. But in general, I still like this approach. Thank you, Wolfram
Hi Wolfram, Thanks for the feedback. > -----Original Message----- > From: Wolfram Sang <wsa+renesas@sang-engineering.com> > Sent: Wednesday, July 3, 2024 10:36 AM > Subject: Re: [PATCH v4 3/3] mmc: renesas_sdhi: Add support for RZ/V2H(P) SoC > > > > If I understand correctly, > > VMMC(Always on 3.3V) for card detection -->PWEN pin > > Vqmmc(1.8v-3.3V) for UHS operation for voltage switch-->IOVS pin > > If these assumptions are correct, then I am sorry to have missed it. I thougaht PWEN is for vqmmc. The assumptions are correct. PWEN is basically vmmc, which needs to be on always for the card detection. > If it is not, then we need two regulators, one for vmmc and one for vqmmc. This is what the TMIO core > expects and already handles correctly on its own, or? Except for the reset handling where we need to > preserve some value in the SDHI core. Yes, probably for PWEN, vmmc regulator with "always on" and "boot on" property enabled in regulator node. So that it will be always on. Cheers, Biju
Hi Wolfram, Thank you for the review. On Wed, Jul 3, 2024 at 10:43 AM Wolfram Sang <wsa+renesas@sang-engineering.com> wrote: > > Hi Prabhakar, > > On Wed, Jun 26, 2024 at 02:23:41PM +0100, Prabhakar wrote: > > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> > > > > The SDHI/eMMC IPs found in the RZ/V2H(P) (a.k.a. r9a09g057) are very > > similar to those found in R-Car Gen3. However, they are not identical, > > necessitating an SoC-specific compatible string for fine-tuning driver > > support. > > > > Key features of the RZ/V2H(P) SDHI/eMMC IPs include: > > - Voltage level control via the IOVS bit. > > - PWEN pin support via SD_STATUS register. > > - Lack of HS400 support. > > - Fixed address mode operation. > > > > internal regulator support is added to control the voltage levels of SD > > pins via sd_iovs/sd_pwen bits in SD_STATUS register. > > > > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> > > Tested-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com> # on RZ/G3S > > --- > > v3->v4 > > - Dropped using 'renesas,sdhi-use-internal-regulator' property > > - Now using of_device_is_available() to check if regulator is available and enabled > > - Dropped extra spaces during operations > > - Included tested by tag from Claudiu > > - Rebased patch on top of https://patchwork.kernel.org/project/linux-renesas-soc/patch/20240626085015.32171-2-wsa+renesas@sang-engineering.com/ > > > > v2->v3 > > - Moved regulator info to renesas_sdhi_of_data instead of quirks > > - Added support to configure the init state of regulator > > - Added function pointers to configure regulator > > - Added REGULATOR_CHANGE_VOLTAGE mask > > > > v1->v2 > > - Now controlling PWEN bit get/set_voltage > > --- > > drivers/mmc/host/renesas_sdhi.h | 13 ++ > > drivers/mmc/host/renesas_sdhi_core.c | 98 ++++++++++++ > > drivers/mmc/host/renesas_sdhi_internal_dmac.c | 147 ++++++++++++++++++ > > drivers/mmc/host/tmio_mmc.h | 5 + > > 4 files changed, 263 insertions(+) > > > > diff --git a/drivers/mmc/host/renesas_sdhi.h b/drivers/mmc/host/renesas_sdhi.h > > index f12a87442338..cd509e7142ba 100644 > > --- a/drivers/mmc/host/renesas_sdhi.h > > +++ b/drivers/mmc/host/renesas_sdhi.h > > @@ -11,6 +11,8 @@ > > > > #include <linux/dmaengine.h> > > #include <linux/platform_device.h> > > +#include <linux/regulator/driver.h> > > +#include <linux/regulator/machine.h> > > #include <linux/workqueue.h> > > #include "tmio_mmc.h" > > > > @@ -36,6 +38,12 @@ struct renesas_sdhi_of_data { > > unsigned int max_blk_count; > > unsigned short max_segs; > > unsigned long sdhi_flags; > > + struct regulator_desc *rdesc; > > + struct regulator_init_data *reg_init_data; > > + bool regulator_init_state; > > + unsigned int regulator_init_voltage; > > + int (*regulator_force_endis)(struct regulator_dev *rdev, bool enable); > > + int (*regulator_force_voltage)(struct regulator_dev *rdev, unsigned int voltage); > > I am open for discussing this but maybe here only > > + struct renesas_sdhi_regulator *internal_regulator > > or something and create the new struct with the additions above? > > > + int (*regulator_force_endis)(struct regulator_dev *rdev, bool enable); > > + int (*regulator_force_voltage)(struct regulator_dev *rdev, unsigned int voltage); > > Do we need these functions because the regulator framework cannot force > these actions because it caches the old state? I wonder if we can avoid > these functions... > Yes, for the voltage setting, it caches the values. However, for the regulator enable/disable, we can use is_enabled(), which probes the hardware. The reset value for PWEN is 1. The regulator_force_endis() callback is mainly added for a scenario where, consider a code flow where the regulator is disabled (using regulator_disable()) and now we land in the reset callback (i.e., renesas_sdhi_reset()). Here, after issuing the reset, the PWEN value will be 1, but we need to restore it back. Hence, this callback is necessary. Note that is_enabled() cannot be used, as it probes the hardware when it switches states after a reset. The reset value for IOVS is 3.3V. Below is the scenario for which regulator_force_voltage() is added: -----> Current value: 1.8V (cached by the regulator) --------------> After reset: ------------------> Hardware has 3.3V, but the regulator core cache still has 1.8V. ----------------------> When requested to switch to 1.8V from MMC core: The regulator core returns success, as it sees 1.8V in the cached state. ----------------------------> As a result, the SD card won't work. Cheers, Prabhakar
diff --git a/drivers/mmc/host/renesas_sdhi.h b/drivers/mmc/host/renesas_sdhi.h index f12a87442338..cd509e7142ba 100644 --- a/drivers/mmc/host/renesas_sdhi.h +++ b/drivers/mmc/host/renesas_sdhi.h @@ -11,6 +11,8 @@ #include <linux/dmaengine.h> #include <linux/platform_device.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/machine.h> #include <linux/workqueue.h> #include "tmio_mmc.h" @@ -36,6 +38,12 @@ struct renesas_sdhi_of_data { unsigned int max_blk_count; unsigned short max_segs; unsigned long sdhi_flags; + struct regulator_desc *rdesc; + struct regulator_init_data *reg_init_data; + bool regulator_init_state; + unsigned int regulator_init_voltage; + int (*regulator_force_endis)(struct regulator_dev *rdev, bool enable); + int (*regulator_force_voltage)(struct regulator_dev *rdev, unsigned int voltage); }; #define SDHI_CALIB_TABLE_MAX 32 @@ -95,6 +103,11 @@ struct renesas_sdhi { struct reset_control *rstc; struct tmio_mmc_host *host; + + bool use_internal_regulator; + struct regulator_dev *internal_regulator; + int (*regulator_force_endis)(struct regulator_dev *rdev, bool enable); + int (*regulator_force_voltage)(struct regulator_dev *rdev, unsigned int voltage); }; #define host_to_priv(host) \ diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c index 0fc159b52fa9..6f8e745477b5 100644 --- a/drivers/mmc/host/renesas_sdhi_core.c +++ b/drivers/mmc/host/renesas_sdhi_core.c @@ -581,12 +581,50 @@ static void renesas_sdhi_reset(struct tmio_mmc_host *host, bool preserve) if (!preserve) { if (priv->rstc) { + bool regulator_enabled; + + /* to restore back the internal regulator after reset make a copy of it */ + if (priv->use_internal_regulator) + regulator_enabled = regulator_is_enabled(host->mmc->supply.vqmmc); + reset_control_reset(priv->rstc); /* Unknown why but without polling reset status, it will hang */ read_poll_timeout(reset_control_status, ret, ret == 0, 1, 100, false, priv->rstc); /* At least SDHI_VER_GEN2_SDR50 needs manual release of reset */ sd_ctrl_write16(host, CTL_RESET_SD, 0x0001); + if (priv->use_internal_regulator) { + int voltage; + + /* + * HW reset might have toggled the regulator state in HW + * which regulator core might be unaware of so restore + * back the regulator state in HW bypassing the regulator + * core. + */ + if (regulator_enabled != + regulator_is_enabled(host->mmc->supply.vqmmc)) { + ret = priv->regulator_force_endis(priv->internal_regulator, + regulator_enabled); + if (ret) + dev_err(&host->pdev->dev, + "Failed to %s internal regulator\n", + regulator_enabled ? "enable" : "disable"); + } + + /* restore back voltage on vqmmc supply */ + voltage = regulator_get_voltage(host->mmc->supply.vqmmc); + if (voltage != host->mmc->ios.signal_voltage) { + voltage = host->mmc->ios.signal_voltage == + MMC_SIGNAL_VOLTAGE_330 ? 3300000 : 1800000; + ret = regulator_set_voltage(host->mmc->supply.vqmmc, + voltage, voltage); + if (ret) + dev_err(&host->pdev->dev, + "Failed to set voltage on internal regulator\n"); + } + } + priv->needs_adjust_hs400 = false; renesas_sdhi_set_clock(host, host->clk_cache); @@ -904,12 +942,36 @@ static void renesas_sdhi_enable_dma(struct tmio_mmc_host *host, bool enable) renesas_sdhi_sdbuf_width(host, enable ? width : 16); } +static int renesas_sdhi_internal_dmac_register_regulator(struct platform_device *pdev, + const struct renesas_sdhi_of_data *of_data) +{ + struct tmio_mmc_host *host = platform_get_drvdata(pdev); + struct renesas_sdhi *priv = host_to_priv(host); + struct regulator_config rcfg = { + .dev = &pdev->dev, + .driver_data = host, + .init_data = of_data->reg_init_data, + }; + const char *devname; + + devname = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s-vqmmc-regulator", + dev_name(&pdev->dev)); + if (!devname) + return -ENOMEM; + + of_data->rdesc->name = devname; + priv->internal_regulator = devm_regulator_register(&pdev->dev, of_data->rdesc, &rcfg); + + return PTR_ERR_OR_ZERO(priv->internal_regulator); +} + int renesas_sdhi_probe(struct platform_device *pdev, const struct tmio_mmc_dma_ops *dma_ops, const struct renesas_sdhi_of_data *of_data, const struct renesas_sdhi_quirks *quirks) { struct tmio_mmc_data *mmd = pdev->dev.platform_data; + struct device_node *internal_regulator; struct tmio_mmc_data *mmc_data; struct renesas_sdhi_dma *dma_priv; struct tmio_mmc_host *host; @@ -972,6 +1034,14 @@ int renesas_sdhi_probe(struct platform_device *pdev, priv->host = host; + if (pdev->dev.of_node) { + internal_regulator = of_get_child_by_name(pdev->dev.of_node, "vqmmc-regulator"); + if (internal_regulator) { + priv->use_internal_regulator = of_device_is_available(internal_regulator); + of_node_put(internal_regulator); + } + } + if (of_data) { mmc_data->flags |= of_data->tmio_flags; mmc_data->ocr_mask = of_data->tmio_ocr_mask; @@ -982,6 +1052,18 @@ int renesas_sdhi_probe(struct platform_device *pdev, mmc_data->max_segs = of_data->max_segs; dma_priv->dma_buswidth = of_data->dma_buswidth; host->bus_shift = of_data->bus_shift; + if (priv->use_internal_regulator) { + if (!of_data->regulator_force_endis) + return dev_err_probe(&pdev->dev, -EINVAL, + "missing function pointer to force regulator enable/disable"); + priv->regulator_force_endis = + of_data->regulator_force_endis; + if (!of_data->regulator_force_voltage) + return dev_err_probe(&pdev->dev, -EINVAL, + "missing function pointer to force regulator voltage"); + priv->regulator_force_voltage = + of_data->regulator_force_voltage; + } /* Fallback for old DTs */ if (!priv->clkh && of_data->sdhi_flags & SDHI_FLAG_NEED_CLKH_FALLBACK) priv->clkh = clk_get_parent(clk_get_parent(priv->clk)); @@ -1053,6 +1135,22 @@ int renesas_sdhi_probe(struct platform_device *pdev, if (ret) goto efree; + if (priv->use_internal_regulator && of_data) { + ret = renesas_sdhi_internal_dmac_register_regulator(pdev, of_data); + if (ret) + goto efree; + + /* Set the default init state for regulator in the HW */ + ret = priv->regulator_force_endis(priv->internal_regulator, + of_data->regulator_init_state); + if (ret) + goto efree; + ret = priv->regulator_force_voltage(priv->internal_regulator, + of_data->regulator_init_voltage); + if (ret) + goto efree; + } + ver = sd_ctrl_read16(host, CTL_VERSION); /* GEN2_SDR104 is first known SDHI to use 32bit block count */ if (ver < SDHI_VER_GEN2_SDR104 && mmc_data->max_blk_count > U16_MAX) diff --git a/drivers/mmc/host/renesas_sdhi_internal_dmac.c b/drivers/mmc/host/renesas_sdhi_internal_dmac.c index d4b66daeda66..991e832821af 100644 --- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c +++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c @@ -89,6 +89,147 @@ static struct renesas_sdhi_scc rcar_gen3_scc_taps[] = { }, }; +static const unsigned int r9a09g057_vqmmc_voltages[] = { + 1800000, 3300000, +}; + +static int r9a09g057_regulator_disable(struct regulator_dev *rdev) +{ + struct tmio_mmc_host *host = rdev_get_drvdata(rdev); + u32 sd_status; + + sd_ctrl_read32_rep(host, CTL_SD_STATUS, &sd_status, 1); + sd_status &= ~SD_STATUS_PWEN; + sd_ctrl_write32(host, CTL_SD_STATUS, sd_status); + + return 0; +} + +static int r9a09g057_regulator_enable(struct regulator_dev *rdev) +{ + struct tmio_mmc_host *host = rdev_get_drvdata(rdev); + u32 sd_status; + + sd_ctrl_read32_rep(host, CTL_SD_STATUS, &sd_status, 1); + sd_status |= SD_STATUS_PWEN; + sd_ctrl_write32(host, CTL_SD_STATUS, sd_status); + + return 0; +} + +static int r9a09g057_regulator_force_endis(struct regulator_dev *rdev, bool enable) +{ + if (enable) + return r9a09g057_regulator_enable(rdev); + + return r9a09g057_regulator_disable(rdev); +} + +static int r9a09g057_regulator_is_enabled(struct regulator_dev *rdev) +{ + struct tmio_mmc_host *host = rdev_get_drvdata(rdev); + u32 sd_status; + + sd_ctrl_read32_rep(host, CTL_SD_STATUS, &sd_status, 1); + return !!(sd_status & SD_STATUS_PWEN); +} + +static int r9a09g057_regulator_get_voltage(struct regulator_dev *rdev) +{ + struct tmio_mmc_host *host = rdev_get_drvdata(rdev); + u32 sd_status; + + sd_ctrl_read32_rep(host, CTL_SD_STATUS, &sd_status, 1); + if (sd_status & SD_STATUS_IOVS) + return 1800000; + + return 3300000; +} + +static int r9a09g057_regulator_set_voltage(struct regulator_dev *rdev, + int min_uV, int max_uV, + unsigned int *selector) +{ + struct tmio_mmc_host *host = rdev_get_drvdata(rdev); + u32 sd_status; + + sd_ctrl_read32_rep(host, CTL_SD_STATUS, &sd_status, 1); + if (min_uV >= 1700000 && max_uV <= 1950000) { + sd_status |= SD_STATUS_IOVS; + *selector = 0; + } else { + sd_status &= ~SD_STATUS_IOVS; + *selector = 1; + } + sd_ctrl_write32(host, CTL_SD_STATUS, sd_status); + + return 0; +} + +static int r9a09g057_regulator_force_voltage(struct regulator_dev *rdev, + unsigned int voltage) +{ + unsigned int selector = 0; + + return r9a09g057_regulator_set_voltage(rdev, voltage, voltage, &selector); +} + +static int r9a09g057_regulator_list_voltage(struct regulator_dev *rdev, + unsigned int selector) +{ + if (selector >= ARRAY_SIZE(r9a09g057_vqmmc_voltages)) + return -EINVAL; + + return r9a09g057_vqmmc_voltages[selector]; +} + +static struct regulator_init_data r9a09g057_regulator_init_data = { + .constraints = { + .valid_ops_mask = REGULATOR_CHANGE_STATUS | REGULATOR_CHANGE_VOLTAGE, + }, +}; + +static const struct regulator_ops r9a09g057_regulator_voltage_ops = { + .enable = r9a09g057_regulator_enable, + .disable = r9a09g057_regulator_disable, + .is_enabled = r9a09g057_regulator_is_enabled, + .list_voltage = r9a09g057_regulator_list_voltage, + .get_voltage = r9a09g057_regulator_get_voltage, + .set_voltage = r9a09g057_regulator_set_voltage, + .map_voltage = regulator_map_voltage_ascend, +}; + +static struct regulator_desc r9a09g057_vqmmc_regulator = { + .of_match = of_match_ptr("vqmmc-r9a09g057-regulator"), + .owner = THIS_MODULE, + .type = REGULATOR_VOLTAGE, + .ops = &r9a09g057_regulator_voltage_ops, + .volt_table = r9a09g057_vqmmc_voltages, + .n_voltages = ARRAY_SIZE(r9a09g057_vqmmc_voltages), +}; + +static const struct renesas_sdhi_of_data of_data_r9a09g057 = { + .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_CLK_ACTUAL | + TMIO_MMC_HAVE_CBSY | TMIO_MMC_MIN_RCAR2, + .capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ | + MMC_CAP_CMD23 | MMC_CAP_WAIT_WHILE_BUSY, + .capabilities2 = MMC_CAP2_NO_WRITE_PROTECT | MMC_CAP2_MERGE_CAPABLE, + .bus_shift = 2, + .scc_offset = 0x1000, + .taps = rcar_gen3_scc_taps, + .taps_num = ARRAY_SIZE(rcar_gen3_scc_taps), + /* DMAC can handle 32bit blk count but only 1 segment */ + .max_blk_count = UINT_MAX / TMIO_MAX_BLK_SIZE, + .max_segs = 1, + .sdhi_flags = SDHI_FLAG_NEED_CLKH_FALLBACK, + .rdesc = &r9a09g057_vqmmc_regulator, + .reg_init_data = &r9a09g057_regulator_init_data, + .regulator_init_state = false, + .regulator_init_voltage = 3300000, + .regulator_force_endis = r9a09g057_regulator_force_endis, + .regulator_force_voltage = r9a09g057_regulator_force_voltage, +}; + static const struct renesas_sdhi_of_data of_data_rza2 = { .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_CLK_ACTUAL | TMIO_MMC_HAVE_CBSY, @@ -260,6 +401,11 @@ static const struct renesas_sdhi_of_data_with_quirks of_rzg2l_compatible = { .quirks = &sdhi_quirks_rzg2l, }; +static const struct renesas_sdhi_of_data_with_quirks of_r9a09g057_compatible = { + .of_data = &of_data_r9a09g057, + .quirks = &sdhi_quirks_rzg2l, +}; + static const struct renesas_sdhi_of_data_with_quirks of_rcar_gen3_compatible = { .of_data = &of_data_rcar_gen3, }; @@ -284,6 +430,7 @@ static const struct of_device_id renesas_sdhi_internal_dmac_of_match[] = { { .compatible = "renesas,sdhi-r8a77990", .data = &of_r8a77990_compatible, }, { .compatible = "renesas,sdhi-r8a77995", .data = &of_rcar_gen3_nohs400_compatible, }, { .compatible = "renesas,sdhi-r9a09g011", .data = &of_rzg2l_compatible, }, + { .compatible = "renesas,sdhi-r9a09g057", .data = &of_r9a09g057_compatible, }, { .compatible = "renesas,rzg2l-sdhi", .data = &of_rzg2l_compatible, }, { .compatible = "renesas,rcar-gen3-sdhi", .data = &of_rcar_gen3_compatible, }, { .compatible = "renesas,rcar-gen4-sdhi", .data = &of_rcar_gen3_compatible, }, diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h index 63000d9c7030..2648f444daa2 100644 --- a/drivers/mmc/host/tmio_mmc.h +++ b/drivers/mmc/host/tmio_mmc.h @@ -44,6 +44,7 @@ #define CTL_RESET_SD 0xe0 #define CTL_VERSION 0xe2 #define CTL_SDIF_MODE 0xe6 /* only known on R-Car 2+ */ +#define CTL_SD_STATUS 0xf2 /* only known on RZ/G2L and RZ/V2H(P) */ /* Definitions for values the CTL_STOP_INTERNAL_ACTION register can take */ #define TMIO_STOP_STP BIT(0) @@ -103,6 +104,10 @@ /* Definitions for values the CTL_SDIF_MODE register can take */ #define SDIF_MODE_HS400 BIT(0) /* only known on R-Car 2+ */ +/* Definitions for values the CTL_SD_STATUS register can take */ +#define SD_STATUS_PWEN BIT(0) /* only known on RZ/V2H(P) */ +#define SD_STATUS_IOVS BIT(16) /* only known on RZ/V2H(P) */ + /* Define some IRQ masks */ /* This is the mask used at reset by the chip */ #define TMIO_MASK_ALL 0x837f031d