| Message ID | 20220422170920.401914-11-sebastian.reichel@collabora.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Basic RK3588 Support | expand |
On 22/04/22 20:09, Sebastian Reichel wrote: > From: Yifeng Zhao <yifeng.zhao@rock-chips.com> > > Add support for RK3588's DWCMSHC controller, which is used for > providing the rootfs on the RK3588 evaluation board. > > Signed-off-by: Yifeng Zhao <yifeng.zhao@rock-chips.com> > [port from vendor BSP] > Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com> One comment otherwise: Acked-by: Adrian Hunter <adrian.hunter@intel.com> > --- > drivers/mmc/host/sdhci-of-dwcmshc.c | 113 +++++++++++++++++++++++----- > 1 file changed, 96 insertions(+), 17 deletions(-) > > diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c > index 54ae0268e002..bc365767e66c 100644 > --- a/drivers/mmc/host/sdhci-of-dwcmshc.c > +++ b/drivers/mmc/host/sdhci-of-dwcmshc.c > @@ -31,6 +31,7 @@ > /* Offset inside the vendor area 1 */ > #define DWCMSHC_HOST_CTRL3 0x8 > #define DWCMSHC_EMMC_CONTROL 0x2c > +#define DWCMSHC_CARD_IS_EMMC BIT(0) > #define DWCMSHC_ENHANCED_STROBE BIT(8) > #define DWCMSHC_EMMC_ATCTRL 0x40 > > @@ -39,7 +40,7 @@ > #define DWCMSHC_EMMC_DLL_RXCLK 0x804 > #define DWCMSHC_EMMC_DLL_TXCLK 0x808 > #define DWCMSHC_EMMC_DLL_STRBIN 0x80c > -#define DLL_STRBIN_TAPNUM_FROM_SW BIT(24) > +#define DECMSHC_EMMC_DLL_CMDOUT 0x810 > #define DWCMSHC_EMMC_DLL_STATUS0 0x840 > #define DWCMSHC_EMMC_DLL_START BIT(0) > #define DWCMSHC_EMMC_DLL_LOCKED BIT(8) > @@ -48,11 +49,21 @@ > #define DWCMSHC_EMMC_DLL_START_POINT 16 > #define DWCMSHC_EMMC_DLL_INC 8 > #define DWCMSHC_EMMC_DLL_DLYENA BIT(27) > -#define DLL_TXCLK_TAPNUM_DEFAULT 0x8 > -#define DLL_STRBIN_TAPNUM_DEFAULT 0x8 > +#define DLL_TXCLK_TAPNUM_DEFAULT 0x10 > +#define DLL_TXCLK_TAPNUM_90_DEGREES 0xA > #define DLL_TXCLK_TAPNUM_FROM_SW BIT(24) > +#define DLL_STRBIN_TAPNUM_DEFAULT 0x8 > +#define DLL_STRBIN_TAPNUM_FROM_SW BIT(24) > +#define DLL_STRBIN_DELAY_NUM_SEL BIT(26) > +#define DLL_STRBIN_DELAY_NUM_OFFSET 16 > +#define DLL_STRBIN_DELAY_NUM_DEFAULT 0x16 > #define DLL_RXCLK_NO_INVERTER 1 > #define DLL_RXCLK_INVERTER 0 > +#define DLL_CMDOUT_TAPNUM_90_DEGREES 0x8 > +#define DLL_CMDOUT_TAPNUM_FROM_SW BIT(24) > +#define DLL_CMDOUT_SRC_CLK_NEG BIT(28) > +#define DLL_CMDOUT_EN_SRC_CLK_NEG BIT(29) > + > #define DLL_LOCK_WO_TMOUT(x) \ > ((((x) & DWCMSHC_EMMC_DLL_LOCKED) == DWCMSHC_EMMC_DLL_LOCKED) && \ > (((x) & DWCMSHC_EMMC_DLL_TIMEOUT) == 0)) > @@ -61,10 +72,16 @@ > #define BOUNDARY_OK(addr, len) \ > ((addr | (SZ_128M - 1)) == ((addr + len - 1) | (SZ_128M - 1))) > > +enum dwcmshc_rk_type { > + DWCMSHC_RK3568, > + DWCMSHC_RK3588, > +}; > + > struct rk35xx_priv { > /* Rockchip specified optional clocks */ > struct clk_bulk_data rockchip_clks[RK35xx_MAX_CLKS]; > struct reset_control *reset; > + enum dwcmshc_rk_type devtype; > u8 txclk_tapnum; > }; > > @@ -133,7 +150,9 @@ static void dwcmshc_request(struct mmc_host *mmc, struct mmc_request *mrq) > static void dwcmshc_set_uhs_signaling(struct sdhci_host *host, > unsigned int timing) > { > - u16 ctrl_2; > + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); > + struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host); > + u16 ctrl, ctrl_2; > > ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2); > /* Select Bus Speed Mode for host */ > @@ -151,8 +170,15 @@ static void dwcmshc_set_uhs_signaling(struct sdhci_host *host, > else if ((timing == MMC_TIMING_UHS_DDR50) || > (timing == MMC_TIMING_MMC_DDR52)) > ctrl_2 |= SDHCI_CTRL_UHS_DDR50; > - else if (timing == MMC_TIMING_MMC_HS400) > + else if (timing == MMC_TIMING_MMC_HS400) { > + /* set CARD_IS_EMMC bit to enable Data Strobe for HS400 */ > + ctrl = sdhci_readw(host, priv->vendor_specific_area1 + DWCMSHC_EMMC_CONTROL); > + ctrl |= DWCMSHC_CARD_IS_EMMC; > + sdhci_writew(host, ctrl, priv->vendor_specific_area1 + DWCMSHC_EMMC_CONTROL); > + > ctrl_2 |= DWCMSHC_CTRL_HS400; > + } > + > sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2); > } > > @@ -185,17 +211,11 @@ static void dwcmshc_rk3568_set_clock(struct sdhci_host *host, unsigned int clock > > host->mmc->actual_clock = 0; > > - /* > - * DO NOT TOUCH THIS SETTING. RX clk inverter unit is enabled > - * by default, but it shouldn't be enabled. We should anyway > - * disable it before issuing any cmds. > - */ > - extra = DWCMSHC_EMMC_DLL_DLYENA | > - DLL_RXCLK_NO_INVERTER << DWCMSHC_EMMC_DLL_RXCLK_SRCSEL; > - sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_RXCLK); > - > - if (clock == 0) > + if (clock == 0) { > + /* Disable interface clock at initial state. */ > + sdhci_set_clock(host, clock); > return; > + } > > /* Rockchip platform only support 375KHz for identify mode */ > if (clock <= 400000) > @@ -213,9 +233,21 @@ static void dwcmshc_rk3568_set_clock(struct sdhci_host *host, unsigned int clock > extra &= ~BIT(0); > sdhci_writel(host, extra, reg); > > - if (clock <= 400000) { > - /* Disable DLL to reset sample clock */ > + if (clock <= 52000000) { > + /* Disable DLL and reset both of sample and drive clock */ > sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_CTRL); > + sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_RXCLK); > + sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_TXCLK); > + sdhci_writel(host, 0, DECMSHC_EMMC_DLL_CMDOUT); > + /* > + * Before switching to hs400es mode, the driver will enable > + * enhanced strobe first. PHY needs to configure the parameters > + * of enhanced strobe first. > + */ > + extra = DWCMSHC_EMMC_DLL_DLYENA | > + DLL_STRBIN_DELAY_NUM_SEL | > + DLL_STRBIN_DELAY_NUM_DEFAULT << DLL_STRBIN_DELAY_NUM_OFFSET; > + sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_STRBIN); > return; > } > > @@ -224,6 +256,15 @@ static void dwcmshc_rk3568_set_clock(struct sdhci_host *host, unsigned int clock > udelay(1); > sdhci_writel(host, 0x0, DWCMSHC_EMMC_DLL_CTRL); > > + /* > + * We shouldn't set DLL_RXCLK_NO_INVERTER for identify mode but > + * we must set it in higher speed mode. > + */ > + extra = DWCMSHC_EMMC_DLL_DLYENA; > + if (priv->devtype == DWCMSHC_RK3568) > + extra |= DLL_RXCLK_NO_INVERTER << DWCMSHC_EMMC_DLL_RXCLK_SRCSEL; > + sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_RXCLK); > + > /* Init DLL settings */ > extra = 0x5 << DWCMSHC_EMMC_DLL_START_POINT | > 0x2 << DWCMSHC_EMMC_DLL_INC | > @@ -246,8 +287,20 @@ static void dwcmshc_rk3568_set_clock(struct sdhci_host *host, unsigned int clock > host->mmc->ios.timing == MMC_TIMING_MMC_HS400) > txclk_tapnum = priv->txclk_tapnum; > > + if ((priv->devtype == DWCMSHC_RK3588) && host->mmc->ios.timing == MMC_TIMING_MMC_HS400) { > + txclk_tapnum = DLL_TXCLK_TAPNUM_90_DEGREES; > + > + extra = DLL_CMDOUT_SRC_CLK_NEG | > + DLL_CMDOUT_EN_SRC_CLK_NEG | > + DWCMSHC_EMMC_DLL_DLYENA | > + DLL_CMDOUT_TAPNUM_90_DEGREES | > + DLL_CMDOUT_TAPNUM_FROM_SW; > + sdhci_writel(host, extra, DECMSHC_EMMC_DLL_CMDOUT); > + } > + > extra = DWCMSHC_EMMC_DLL_DLYENA | > DLL_TXCLK_TAPNUM_FROM_SW | > + DLL_RXCLK_NO_INVERTER << DWCMSHC_EMMC_DLL_RXCLK_SRCSEL | > txclk_tapnum; > sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_TXCLK); > > @@ -347,7 +400,25 @@ static int dwcmshc_rk35xx_init(struct sdhci_host *host, struct dwcmshc_priv *dwc > return 0; > } > > +static void dwcmshc_rk35xx_postinit(struct sdhci_host *host, struct dwcmshc_priv *dwc_priv) > +{ > + /* > + * Don't support highspeed bus mode with low clk speed as we > + * cannot use DLL for this condition. > + */ > + if (host->mmc->f_max <= 52000000) { > + dev_info(mmc_dev(host->mmc), "Disabling HS200/HS400, frequency too low (%d)\n", > + host->mmc->f_max); > + host->mmc->caps2 &= ~(MMC_CAP2_HS200 | MMC_CAP2_HS400); > + host->mmc->caps &= ~(MMC_CAP_3_3V_DDR | MMC_CAP_1_8V_DDR); Ideally, this should be done before mmc_add_host(), for example by using sdhci_setup_host() + __sdhci_add_host() instead of sdhci_add_host(), and putting dwcmshc_rk35xx_postinit() between sdhci_setup_host() and __sdhci_add_host(). > + } > +} > + > static const struct of_device_id sdhci_dwcmshc_dt_ids[] = { > + { > + .compatible = "rockchip,rk3588-dwcmshc", > + .data = &sdhci_dwcmshc_rk35xx_pdata, > + }, > { > .compatible = "rockchip,rk3568-dwcmshc", > .data = &sdhci_dwcmshc_rk35xx_pdata, > @@ -435,6 +506,11 @@ static int dwcmshc_probe(struct platform_device *pdev) > goto err_clk; > } > > + if (of_device_is_compatible(pdev->dev.of_node, "rockchip,rk3588-dwcmshc")) > + rk_priv->devtype = DWCMSHC_RK3588; > + else > + rk_priv->devtype = DWCMSHC_RK3568; > + > priv->priv = rk_priv; > > err = dwcmshc_rk35xx_init(host, priv); > @@ -448,6 +524,9 @@ static int dwcmshc_probe(struct platform_device *pdev) > if (err) > goto err_clk; > > + if (rk_priv) > + dwcmshc_rk35xx_postinit(host, priv); > + > return 0; > > err_clk:
diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c index 54ae0268e002..bc365767e66c 100644 --- a/drivers/mmc/host/sdhci-of-dwcmshc.c +++ b/drivers/mmc/host/sdhci-of-dwcmshc.c @@ -31,6 +31,7 @@ /* Offset inside the vendor area 1 */ #define DWCMSHC_HOST_CTRL3 0x8 #define DWCMSHC_EMMC_CONTROL 0x2c +#define DWCMSHC_CARD_IS_EMMC BIT(0) #define DWCMSHC_ENHANCED_STROBE BIT(8) #define DWCMSHC_EMMC_ATCTRL 0x40 @@ -39,7 +40,7 @@ #define DWCMSHC_EMMC_DLL_RXCLK 0x804 #define DWCMSHC_EMMC_DLL_TXCLK 0x808 #define DWCMSHC_EMMC_DLL_STRBIN 0x80c -#define DLL_STRBIN_TAPNUM_FROM_SW BIT(24) +#define DECMSHC_EMMC_DLL_CMDOUT 0x810 #define DWCMSHC_EMMC_DLL_STATUS0 0x840 #define DWCMSHC_EMMC_DLL_START BIT(0) #define DWCMSHC_EMMC_DLL_LOCKED BIT(8) @@ -48,11 +49,21 @@ #define DWCMSHC_EMMC_DLL_START_POINT 16 #define DWCMSHC_EMMC_DLL_INC 8 #define DWCMSHC_EMMC_DLL_DLYENA BIT(27) -#define DLL_TXCLK_TAPNUM_DEFAULT 0x8 -#define DLL_STRBIN_TAPNUM_DEFAULT 0x8 +#define DLL_TXCLK_TAPNUM_DEFAULT 0x10 +#define DLL_TXCLK_TAPNUM_90_DEGREES 0xA #define DLL_TXCLK_TAPNUM_FROM_SW BIT(24) +#define DLL_STRBIN_TAPNUM_DEFAULT 0x8 +#define DLL_STRBIN_TAPNUM_FROM_SW BIT(24) +#define DLL_STRBIN_DELAY_NUM_SEL BIT(26) +#define DLL_STRBIN_DELAY_NUM_OFFSET 16 +#define DLL_STRBIN_DELAY_NUM_DEFAULT 0x16 #define DLL_RXCLK_NO_INVERTER 1 #define DLL_RXCLK_INVERTER 0 +#define DLL_CMDOUT_TAPNUM_90_DEGREES 0x8 +#define DLL_CMDOUT_TAPNUM_FROM_SW BIT(24) +#define DLL_CMDOUT_SRC_CLK_NEG BIT(28) +#define DLL_CMDOUT_EN_SRC_CLK_NEG BIT(29) + #define DLL_LOCK_WO_TMOUT(x) \ ((((x) & DWCMSHC_EMMC_DLL_LOCKED) == DWCMSHC_EMMC_DLL_LOCKED) && \ (((x) & DWCMSHC_EMMC_DLL_TIMEOUT) == 0)) @@ -61,10 +72,16 @@ #define BOUNDARY_OK(addr, len) \ ((addr | (SZ_128M - 1)) == ((addr + len - 1) | (SZ_128M - 1))) +enum dwcmshc_rk_type { + DWCMSHC_RK3568, + DWCMSHC_RK3588, +}; + struct rk35xx_priv { /* Rockchip specified optional clocks */ struct clk_bulk_data rockchip_clks[RK35xx_MAX_CLKS]; struct reset_control *reset; + enum dwcmshc_rk_type devtype; u8 txclk_tapnum; }; @@ -133,7 +150,9 @@ static void dwcmshc_request(struct mmc_host *mmc, struct mmc_request *mrq) static void dwcmshc_set_uhs_signaling(struct sdhci_host *host, unsigned int timing) { - u16 ctrl_2; + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host); + u16 ctrl, ctrl_2; ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2); /* Select Bus Speed Mode for host */ @@ -151,8 +170,15 @@ static void dwcmshc_set_uhs_signaling(struct sdhci_host *host, else if ((timing == MMC_TIMING_UHS_DDR50) || (timing == MMC_TIMING_MMC_DDR52)) ctrl_2 |= SDHCI_CTRL_UHS_DDR50; - else if (timing == MMC_TIMING_MMC_HS400) + else if (timing == MMC_TIMING_MMC_HS400) { + /* set CARD_IS_EMMC bit to enable Data Strobe for HS400 */ + ctrl = sdhci_readw(host, priv->vendor_specific_area1 + DWCMSHC_EMMC_CONTROL); + ctrl |= DWCMSHC_CARD_IS_EMMC; + sdhci_writew(host, ctrl, priv->vendor_specific_area1 + DWCMSHC_EMMC_CONTROL); + ctrl_2 |= DWCMSHC_CTRL_HS400; + } + sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2); } @@ -185,17 +211,11 @@ static void dwcmshc_rk3568_set_clock(struct sdhci_host *host, unsigned int clock host->mmc->actual_clock = 0; - /* - * DO NOT TOUCH THIS SETTING. RX clk inverter unit is enabled - * by default, but it shouldn't be enabled. We should anyway - * disable it before issuing any cmds. - */ - extra = DWCMSHC_EMMC_DLL_DLYENA | - DLL_RXCLK_NO_INVERTER << DWCMSHC_EMMC_DLL_RXCLK_SRCSEL; - sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_RXCLK); - - if (clock == 0) + if (clock == 0) { + /* Disable interface clock at initial state. */ + sdhci_set_clock(host, clock); return; + } /* Rockchip platform only support 375KHz for identify mode */ if (clock <= 400000) @@ -213,9 +233,21 @@ static void dwcmshc_rk3568_set_clock(struct sdhci_host *host, unsigned int clock extra &= ~BIT(0); sdhci_writel(host, extra, reg); - if (clock <= 400000) { - /* Disable DLL to reset sample clock */ + if (clock <= 52000000) { + /* Disable DLL and reset both of sample and drive clock */ sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_CTRL); + sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_RXCLK); + sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_TXCLK); + sdhci_writel(host, 0, DECMSHC_EMMC_DLL_CMDOUT); + /* + * Before switching to hs400es mode, the driver will enable + * enhanced strobe first. PHY needs to configure the parameters + * of enhanced strobe first. + */ + extra = DWCMSHC_EMMC_DLL_DLYENA | + DLL_STRBIN_DELAY_NUM_SEL | + DLL_STRBIN_DELAY_NUM_DEFAULT << DLL_STRBIN_DELAY_NUM_OFFSET; + sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_STRBIN); return; } @@ -224,6 +256,15 @@ static void dwcmshc_rk3568_set_clock(struct sdhci_host *host, unsigned int clock udelay(1); sdhci_writel(host, 0x0, DWCMSHC_EMMC_DLL_CTRL); + /* + * We shouldn't set DLL_RXCLK_NO_INVERTER for identify mode but + * we must set it in higher speed mode. + */ + extra = DWCMSHC_EMMC_DLL_DLYENA; + if (priv->devtype == DWCMSHC_RK3568) + extra |= DLL_RXCLK_NO_INVERTER << DWCMSHC_EMMC_DLL_RXCLK_SRCSEL; + sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_RXCLK); + /* Init DLL settings */ extra = 0x5 << DWCMSHC_EMMC_DLL_START_POINT | 0x2 << DWCMSHC_EMMC_DLL_INC | @@ -246,8 +287,20 @@ static void dwcmshc_rk3568_set_clock(struct sdhci_host *host, unsigned int clock host->mmc->ios.timing == MMC_TIMING_MMC_HS400) txclk_tapnum = priv->txclk_tapnum; + if ((priv->devtype == DWCMSHC_RK3588) && host->mmc->ios.timing == MMC_TIMING_MMC_HS400) { + txclk_tapnum = DLL_TXCLK_TAPNUM_90_DEGREES; + + extra = DLL_CMDOUT_SRC_CLK_NEG | + DLL_CMDOUT_EN_SRC_CLK_NEG | + DWCMSHC_EMMC_DLL_DLYENA | + DLL_CMDOUT_TAPNUM_90_DEGREES | + DLL_CMDOUT_TAPNUM_FROM_SW; + sdhci_writel(host, extra, DECMSHC_EMMC_DLL_CMDOUT); + } + extra = DWCMSHC_EMMC_DLL_DLYENA | DLL_TXCLK_TAPNUM_FROM_SW | + DLL_RXCLK_NO_INVERTER << DWCMSHC_EMMC_DLL_RXCLK_SRCSEL | txclk_tapnum; sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_TXCLK); @@ -347,7 +400,25 @@ static int dwcmshc_rk35xx_init(struct sdhci_host *host, struct dwcmshc_priv *dwc return 0; } +static void dwcmshc_rk35xx_postinit(struct sdhci_host *host, struct dwcmshc_priv *dwc_priv) +{ + /* + * Don't support highspeed bus mode with low clk speed as we + * cannot use DLL for this condition. + */ + if (host->mmc->f_max <= 52000000) { + dev_info(mmc_dev(host->mmc), "Disabling HS200/HS400, frequency too low (%d)\n", + host->mmc->f_max); + host->mmc->caps2 &= ~(MMC_CAP2_HS200 | MMC_CAP2_HS400); + host->mmc->caps &= ~(MMC_CAP_3_3V_DDR | MMC_CAP_1_8V_DDR); + } +} + static const struct of_device_id sdhci_dwcmshc_dt_ids[] = { + { + .compatible = "rockchip,rk3588-dwcmshc", + .data = &sdhci_dwcmshc_rk35xx_pdata, + }, { .compatible = "rockchip,rk3568-dwcmshc", .data = &sdhci_dwcmshc_rk35xx_pdata, @@ -435,6 +506,11 @@ static int dwcmshc_probe(struct platform_device *pdev) goto err_clk; } + if (of_device_is_compatible(pdev->dev.of_node, "rockchip,rk3588-dwcmshc")) + rk_priv->devtype = DWCMSHC_RK3588; + else + rk_priv->devtype = DWCMSHC_RK3568; + priv->priv = rk_priv; err = dwcmshc_rk35xx_init(host, priv); @@ -448,6 +524,9 @@ static int dwcmshc_probe(struct platform_device *pdev) if (err) goto err_clk; + if (rk_priv) + dwcmshc_rk35xx_postinit(host, priv); + return 0; err_clk: